A compilation of sulphur dioxide and carbon dioxide emission-rate data from Cook Inlet volcanoes (Redoubt, Spurr, Illiamna, and Augustine), Alaska during the period from 1990 to 1994
This report contains all of the available daily sulfur dioxide and carbon dioxide emission rates from Cook Inlet volcanoes as determined by the U.S. Geological Survey (USGS) from March 1990 through July 1994. Airborne sulfur dioxide gas sampling of the |
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Bedrock Geologic Map of the Yucca Mountain Area, Nye County, Nevada
Yucca Mountain, Nye County, Nevada, has been identified as a potential site for underground storage of high-level radioactive nuclear waste. Detailed bedrock geologic maps form an integral part of the site characterization program by providing the fundam |
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Digital Compilation of "Preliminary Map of Landslide Deposits in Santa Cruz County, California, By Cooper-Clark and Associates, 1975": A Digital Map Database
A 1:62,500-scale black-and-white map identifying some 2,000 landslides of various types in Santa Cruz County, California, has been converted to a digital-map database that can be acquired from the U.S. Geological Survey over the Internet or on magnetic ta |
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Digital Compilation of Landslide Overview Map of the Conterminous United States
This dataset consists of polygons enclosing areas of landslide incidence and susceptibility for the conterminous United States. |
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Digital Geologic Map Database of the Nevada Test Site Area, Nevada
Forty years of geologic investigations at the Nevada Test Site (NTS) have been digitized. These data include all geologic information that: (1) has been collected, and (2) can be represented on a map within the map borders at the map scale is included in |
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Digital geologic map and database of the Frederick 30 X 60 minute quadrangle, Maryland, Virginia, and West Virginia
The geology of the Frederick 30 by 60 minute quadrangle, Maryland, Virginia, and West Virginia, was mapped on 1:24,000-scale base maps from 1989 to 1994. The geologic data were manually compiled at 1:100,000-scale in 1997 and were digitized and converted |
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Digital geologic map and map database of parts of Marin, San Francisco, Alameda, Contra Costa, and Sonoma Counties, California
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area. Together with the accompanying text file (mageo.t |
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Digital map showing faults, lineaments, and earthquake epicenters in the Pahute Mesa 30' x 60' quadrangle, Nevada, in Arc/Info ASCII generate and Arc/Info export formats
This digital map compilation incorporates fault, air photo lineament, and earthquake epicenter data from within the Pahute Mesa 30' by 60' quadrangle, southern Nye County, Nevada (fig. 1). The compilation contributes to the U.S. Department of Energy's |
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Digital spatial data for the map "Earthquakes in and near the northeastern United States, 1638-1998"
The data are those used to make a large-format, colored map of earthquakes in the northeastern United States and adjacent parts of Canada and the Atlantic Ocean (Wheeler, 2000; Wheeler and others, 2001; references in Data_Quality_Information, Lineage). Th |
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Dust Deposition in Southern Nevada and California, 1984- 1989: Relations to climate, source area, and lithology
Dust samples taken annually for five years from 55 sites in southern Nevada and California provide an unparalleled source of information on modern rates of dust deposition, grain size, and mineralogical and chemical composition. The relations of modern d |
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Elements of infrastructure and seismic hazard in the central United States - Database
This digital map database consists of the ESRI ARC/INFO Version 7.0.2 coverages used to generate the plates in Professional Paper 1538-M (1994). Base-data is from 1:2,000,000-scale Digital Line Graph (DLG) data (roads, railroads, streams, water bodies, |
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Evaluation of faults and their effect on ground-water flow southwest of Frenchman Flat, Nye and Clark Counties, Nevada: A Digital Database
Ground-water flow through the region south and west of Frenchman Flat, in the Ash Meadows subbasin of the Death Valley ground-water flow system, is controlled mostly by faults which arrange the distribution of permeable and impermeable rocks. In addition, |
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GIS Coverages of the Castle Mountain Fault, South Central Alaska
This data set represents GIS coverages of the Castle Mountain Fault captured from three maps representing portions of the fault in south central Alaska. |
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Generalized Surficial Geologic Map of the Denver 1°x2° Quadrangle, Colorado
Thirty-nine types of surficial geologic deposits and residual materials of Quaternary age are described and mapped in the greater Denver area, in part of the Front Range, and in the piedmont and plains east of Denver, Boulder, and Castle Rock. Description |
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Generalized Surficial Geologic Map of the Pueblo 1° x 2° Quadrangle, Colorado
Fifty-three types of surficial geologic deposits and residual materials of Quaternary age are described in a pamphlet and located on a map of the greater Pueblo area, in part of the Front Range, in the Wet and Sangre de Cristo Mountains, and on the plains |
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Geologic Map Database of the Washington DC Area Featuring Data From Three 30 X 60 Minute Quadrangles: Frederick, Washington West, and Fredericksburg
The Washington DC Area geologic map database (DCDB) provides geologic map information of areas to the NW, W, and SW of Washington, DC to various professionals and private citizens who have uses for geologic data. Digital, geographically referenced, geolo |
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Geologic Map and Digital Database of the Upper Parashant Canyon and Vicinity, Mohave County, Northwestern Arizona
This digital map database is compiled from unpublished data and new mapping by the authors, represents the general distribution of surficial and bedrock geology in the mapped area. Together with the accompanying pamphlet, it provides current information |
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Geologic Map of Colorado National Monument and Adjacent Areas, Mesa County, Colorado
New 1:24,000-scale geologic mapping in the Colorado National Monument Quadrangle and adjacent areas, in support of the USGS Western Colorado I-70 Corridor Cooperative Geologic Mapping Project, provides new interpretations of and data for the stratigraphy, |
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Geologic Map of the Challis 1°x2° Quadrangle, Idaho
The paper version of The geology of the Challis 1°x2° quadrangle, was compiled by Fred Fisher, Dave McIntyre and Kate Johnson in 1992. The geology was compiled on a 1:250,000 scale topographic base map. TechniGraphic System, Inc. of Fort Collins Color |
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Geologic Map of the Clifton Quadrangle, Mesa County, Colorado
1:24,000-scale geologic mapping in the Clifton 7.5' quadrangle, in support of the USGS Colorado River/I-70 Corridor Cooperative Geologic Mapping Project, provides interpretations of the Quaternary stratigraphy and geologic hazards in this area of the Gran |
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Geologic Map of the Death Valley Ground-Water Model Area, Nevada and California
This digital geologic and tectonic database of the Death Valley ground-water model area, as well as its accompanying geophysical maps, are compiled at 1:250,000 scale. The map compilation presents new polygon, line, and point vector data for the Death Va |
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Geologic Map of the Eminence Quadrangle, Shannon County, Missouri
The geology of the Eminence 7 1/2-minute quadrangle , Shannon County, Missouri was mapped from 1996 through 1997 as part of the Midcontinent Karst Systems and Geologic Mapping Project, Eastern Earth Surface Processes Team. The map supports the production |
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Geologic Map of the Hogback Mountain Quadrangle, Lewis and Clark and Meagher Counties, Montana
The geologic map of the Hogback Mountain quadrangle, scale 1:24,000, was made as part of the Montana Investigations Project to provide new information on the stratigraphy, structure, and geologic history of an area in the geologically complex southern par |
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Geologic Map of the Salmon National Forest and Vicinity, East-Central Idaho
The geology of the Salmon National Forest, Idaho, was compiled from published and unpublished sources and new field mapping by Evans, Lund, Tysdal, and Winkler between 1997 and 2001. The geology was compiled onto 1:100,000-scale topographic base maps for |
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Geologic Map of the Silt Quadrangle, Garfield County, Colorado
New 1:24,000-scale geologic mapping in the Silt 7.5' quadrangle, in support of the USGS Western Colorado I-70 Corridor Cooperative Geologic Mapping Project, provides new interpretations of the stratigraphy, structure, and geologic hazards in the area of t |
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Geologic Map of the Tularosa Mountains 30´ × 60´ Quadrangle, Catron County, New Mexico
This digital map database was compiled from previously published and unpublished data by the author and USGS colleagues, and from published maps by others, as indicated in figure 3 on the map sheet. A pamphlet included with the map provides a brief discu |
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Geologic Map of the eastern part of the Challis National Forest and vicinity, Idaho
The paper version of the Geologic Map of the eastern part of the Challis National Forest and vicinity, Idaho was compiled by Anna Wilson and Betty Skipp in 1994. The geology was compiled on a 1:250,000 scale topographic base map. TechniGraphic System, I |
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Geologic and structure maps of the Kalispell 1:250,000 quadrangle, Montana, and Alberta and British Columbia: a digital database.
This dataset was digitized by the U.S. Geological Survey EROS Data Center and U.S. Geological Survey Spokane Field Office for input into an Arc/Info geographic information systsem (GIS). The digital geologic map database can be queried in many ways to pro |
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Geologic and structure maps of the Wallace 1°x2° quadrangle, Montana and Idaho: A digital database
This dataset was digitized by the U.S. Geological Survey EROS Data Center and U.S. Geological Survey Spokane Field Office for input into an Arc/Info geographic information systsem (GIS) The digital geologic map database can be queried in many ways to pro |
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Geologic map and digital database of the Porcupine Wash 7.5 minute quadrangle, Riverside County, California
This data set maps and describes the geology of the Porcupine Wash 7.5 minute quadrangle, Riverside County, southern California. The quadrangle, situated in Joshua Tree National Park in the eastern Transverse Ranges physiographic and structural province, |
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Geologic map and digital database of the Redlands 7.5' quadrangle, San Bernardino and Riverside Counties, California
The Redlands 7.5' quadrangle is located in the southeastern margin of the San Bernardino Basin, an extensional region situated in a right-step-over zone within the San Andreas Fault system. The quadrangle is traversed by several important fault zones, in |
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Geologic map and digital database of the Yucaipa 7.5' quadrangle, San Bernardino and Riverside Counties, California
The Yucaipa 7.5' quadrangle is located at the southeastern margin of the San Bernardino Basin, an extensional region situated within a right-step-over zone between the San Jacinto and San Andreas Fault zones. The quadrangle is traversed by several faults |
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Geologic map and map database of northeastern San Francisco Bay region, California; Most of Solano County and parts of Napa, Marin, Contra Costa, San Joaquin, Sacramento, Yolo, and Sonoma Counties
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area. Together with the accompanying text file (nesfmf |
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Geologic map and map database of the Oakland metropolitan area, Alameda, Contra Costa, and San Francisco Counties, California
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area. Together with the accompanying text file (oakmf. |
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Geologic map and map database of the Palo Alto 30' X 60' quadrangle, California
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area. Together with the accompanying text file (pamf.p |
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Geologic map and map database of the Spreckels 7.5-minute quadrangle, Monterey County, California
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area. Together with the accompanying text file (skmf.tx |
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Geologic map of the Battle Ground 7.5-minute quadrangle, Clarke County, Washington
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits of the Battle Ground 7.5 minute quadrangle. The database delineates m |
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Geologic map of the Cape Mendocino, Eureka, Garberville, and southwestern part of the Hayfork 30 X 60 Quadrangles and Adjacent Offshore Area, Northern California
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area. Together with the accompanying text file (ceghmf |
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Geologic map of the Deer Island quadrangle, Columbia County, Oregon and Cowlitz County, Washington
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits of the Deer Island 7.5-minute quadrangle. The database delineates ma |
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Geologic map of the Dillon 1°x2° quadrangle, Idaho and Montana
The digital ARC/INFO databases included in this website provide a GIS database for the geologic map of the Dillon 1 degree by 2 degree quadrangle of southwest Montana and east-central Idaho. The geologic map was orginally published as U.S. Geological Sur |
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Geologic map of the Eagle quadrangle, Eagle County, Colorado
The Eagle quadrangle covers an area that straddles the Eagle River and Interstate 70 (I-70) and it includes the town of Eagle, Colo., which is located in the southwestern part of the quadrangle, just south of I-70 and the Eagle River, about 37 km west of |
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Geologic map of the Ennis 30' X 60' quadrangle, Madison and Gallatin Counties, Montana, and Park County, Wyoming
The Ennis 1:100,000 quadrangle lies within both the Laramide (Late Cretaceous to early Tertiary) foreland province of southwestern Montana and the northeastern margin of the middle to late Tertiary Basin and Range province. The oldest rocks in the quadran |
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Geologic map of the Frisco quadrangle, Summit County, Colorado
New 1:24,000-scale geologic mapping along the Interstate-70 urban corridor in western Colorado, in support of the USGS Central Region State/USGS Cooperative Geologic Mapping Project, is contributing to a more complete understanding of the stratigraphy, st |
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Geologic map of the Grand Junction quadrangle, Mesa County, Colorado
This 1:24,000-scale geologic map of the Grand Junction 7.5' quadrangle, in support of the USGS Western Colorado I-70 Corridor Cooperative Geologic Mapping Project, provides new interpretations of the stratigraphy, structure, and geologic hazards in the ar |
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Geologic map of the Jasper quadrangle, Newton and Boone Counties, Arkansas
This digital geologic map compilation presents new polygon (i.e., geologic map unit contacts), line (i.e., fault, fold axis, and structure contour), and point (i.e., structural attitude, contact elevations) vector data for the Jasper 7 1/2' quadrangle in |
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Geologic map of the Palisade Quadrangle, Mesa County, Colorado
The Palisade 1:24,000 quadrangle is in Mesa County in western Colorado. Because the map area is dominated by various surficial deposits, the map depicts 22 different Quaternary units. Two prominent river terraces are present in the quadrangle containing g |
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Geologic map of the Rifle Falls quadrangle, Garfield County, Colorado
New 1:24,000-scale geologic map of the Rifle Falls 7.5' quadrangle, in support of the USGS Western Colorado I-70 Corridor Cooperative Geologic Mapping Project, provides new interpretations of the stratigraphy, structure, and geologic hazards in the area o |
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Geologic map of the Rio Puerco quadrangle, Bernalillo and Valencia Counties, New Mexico
The Rio Puerco quadrangle is located southwest of Albuquerque in central New Mexico and covers part of the western part of the Isleta Reservation. The U.S. Geological Survey, the New Mexico Bureau of Geology and Mineral Resources, and the University of Ne |
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Geologic map of the Santa Ana Pueblo quadrangle, Sandoval County, New Mexico
The Santa Ana Pueblo quadrangle is located in the northern part of the Albuquerque basin, which is the largest basin or graben within the Rio Grande rift. The quadrangle is underlain by poorly consolidated sedimentary rocks of the Santa Fe Group and is d |
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Geologic map of the Sawmill Mountain quadrangle, Kern and Ventura Counties, California
The Sawmill Mountain quadrangle is located in the western Transverse Ranges of California, about 10 km west of Frazier Park. It includes Mt. Pinos, Mt. Abel (Cerro Noroeste), a part of the southern San Emigdio Mountains, and straddles an eleven-kilometer |
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Geologic map of the Sedan quadrangle, Gallatin and Park Counties, Montana
This quadrangle lies 6.4 km (4 mi) northeast of Bozeman, Mont., in southwestern Montana. Metamorphic, sedimentary, and volcanic rocks of Precambrian to Tertiary age are exposed in the Bridger Range and southwestern margin of the Crazy Mountains Basin in |
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Geologic map of the Silver Lake quadrangle, Cowlitz County, Washington
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits of the Silver lake 7.5 minute quadrangle. The database delineates ma |
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Geologic map of the Vail East quadrangle, Eagle County, Colorado
New 1:24,000-scale geologic mapping along the Interstate-70 urban corridor in western Colorado, in support of the State/ USGS Cooperative Geologic Mapping Project, is contributing to a more complete understanding of the stratigraphy, structure, tectonic e |
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Geologic map of the Yucca Mountain region, Nye County, Nevada
Yucca Mountain, Nye County, Nevada, has been identified as a potential site for underground storage of high-level radioactive waste. This geologic map compilation, including all of Yucca Mountain and Crater Flat, most of the Calico Hills, western Jackass |
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Geologic maps and structure sections of the southwestern Santa Clara Valley and southern Santa Cruz Mountains, Santa Clara and Santa Cruz Counties, California
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area. Together with the accompanying text file (scvmf. |
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Geology of the onshore part of San Mateo County, California: A digital database
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in San Mateo County. Together with the accompanying text, it provide |
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Geology of the southernmost part of Santa Clara County, California: A digital database
The area of study for this report is the southern portion of Santa Clara County that lies within the Monterey 30 by 60 minute quadrangle, consisting of parts of the Watsonville East, Chittenden, San Felipe, Three Sisters, and Mariposa Peak 7.5 minute qu |
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Hazard maps of the U.S.
The coverages were created using the gridded data available from this ftp site. Most of the gridded data for the United States is at a spacing of 0.1 degrees latitude and longitude. The higher resolution data available for California, Nevada, and part of |
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Hydrostructural Maps of the Death Valley Regional Flow System, Nevada and California--Map A: Structural Framework, Neogene Basins, and Potentiometric Surface; Map B: Structural Framework, Earthquake Epicenters, and Potential Zones of Enhanced Hydraulic Conductivity
The locations of principal faults and structural zones that may influence ground-water flow were compiled in support of a three-dimensional ground-water model for the Death Valley regional flow system (DVRFS), which covers 80,000 square km in southwestern |
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Inventory of landslides triggered by the 1994 Northridge, California earthquake
The 17 January 1994 Northridge, California, earthquake (M=6.7) triggered more than 11,000 landslides over an area of about 10,000 km². Most of the landslides were concentrated in a 1,000-km² area that includes the Santa Susana Mountains and the mountain |
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Karst Map of Puerto Rico
This map is a digital update of The karst landforms of Puerto Rico (Monroe, 1976). In this new version the karst areas on the islands of Mona and Monito have been added from Briggs and Seiders (1972). This map will serve as the basis for the Puerto Rico |
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Landslide initiation locations in Caquipec quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls21622. |
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Landslide initiation locations in Castillo San Felipe quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls23622. |
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Landslide initiation locations in Cerro Caral quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls23622. |
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Landslide initiation locations in Cobán quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls21623. |
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Landslide initiation locations in Entre Ríos quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls23622. |
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Landslide initiation locations in Gualán quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls23613. |
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Landslide initiation locations in Juyamá quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls23622. |
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Landslide initiation locations in La Tinta quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls21614. |
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Landslide initiation locations in La Unión quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls23604. |
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Landslide initiation locations in Los Amates quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls23611. |
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Landslide initiation locations in Mariscos quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls23622. |
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Landslide initiation locations in Morales quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls23622. |
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Landslide initiation locations in Nicaragua
We present an inventory of the initiation locations of landslides triggered by the passage of Hurricane Mitch, October 21-31, 1998 in seven study areas in Nicaragua. The inventory was compiled from aerial photographs and field mapping. Most (perhaps 95% |
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Landslide initiation locations in Panzós quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls22622. |
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Landslide initiation locations in Pueblo Viejo quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls22611. |
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Landslide initiation locations in Río Hondo quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls21623. |
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Landslide initiation locations in Senahú quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls22623. |
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Landslide initiation locations in Sierra de las Minas quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls23614. |
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Landslide initiation locations in Tactic quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls21614. |
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Landslide initiation locations in Tucurú quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls21621. |
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Landslide initiation locations in Zacapa quadrangle, Guatemala
This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls22601. |
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Landslides in Alameda County, California, A Digital Database Extracted from Preliminary Photointerpretation Maps of Surficial Deposits by T.H. Nilsen in USGS Open-File Report 75-277
All or part of 25 7.5-minute quadrangles identifying 8465 Landslides largely slow-moving slides and earth flows in Alameda County, California, have been converted to a digital-map database, compiled at 1:24,000 scale and plotted at 1:62,500 scale, that ca |
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Landslides in Caquipec quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Castillo San Felipe quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Cerro Caral quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Cobán quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Entre Ríos quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Gualán quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Juyamá quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in La Tinta quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in La Unión quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Los Amates quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Mariscos quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Morales quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Panzós quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Pueblo Viejo quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Río Hondo quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Senahú quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Sierra de las Minas quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Tactic quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Tucurú quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides in Zacapa quadrangle, Guatemala
This cover contains the outlines of landslides formed during Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides and related effects in and adjacent to downstream drainages. Most landslides were mapped using |
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Landslides triggered by Hurricane Mitch in El Salvador
This cover contains the outlines of landslides and debris flows caused by heavy rainfall associated with Hurricane Mitch in October-November 1998. The landslides and debris flows shown in this coverage were mapped using 1:40,00-scale and 1:15,000-scale b |
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Landslides triggered by Hurricane Mitch in Nicaragua
We present an inventory of landslides and related downchannel effects triggered by the passage of Hurricane Mitch, October 21-31, 1998 in seven study areas in Nicaragua. The inventory was compiled from aerial photographs and field mapping. Most (perhaps |
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Map and map database of susceptibility to slope failure by sliding and earthflow in the Oakland area, California
Map data that predict the varying likelihood of landsliding can help public agencies make informed decisions on land use and zoning. This map, prepared in a geographic information system from a statistical model, estimates the relative likelihood of loca |
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Map showing alpine debris flows triggered by a July 28, 1999 thunderstorm in the central Front Range of Colorado: Debris-flow initiation points
On July 28, 1999, about 480 debris flows were triggered by an afternoon thunderstorm along the Continental Divide in Clear Creek and Summit counties in the central Front Range of Colorado. This cover shows the initiation locations of the debris flows. Jon |
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Map showing alpine debris flows triggered by a July 28, 1999 thunderstorm in the central Front Range of Colorado: Debris-flow polygons
On July 28, 1999, about 480 debris flows were triggered by an afternoon thunderstorm along the Continental Divide in Clear Creek and Summit counties in the central Front Range of Colorado. This cover shows the outlines of debris-flow source areas, travel |
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Map showing inventory and regional susceptibility for Holocene debris flows and related fast moving landslides in the conterminous United States: Raster data
Debris flows, debris avalanches, mud flows and lahars are fast-moving landslides that occur in a wide variety of environments throughout the world. They are particularly dangerous to life and property because they move quickly, destroy objects in their p |
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Map showing inventory and regional susceptibility for Holocene debris flows and related fast moving landslides in the conterminous United States: vector data
Debris flows, debris avalanches, mud flows and lahars are fast-moving landslides that occur in a wide variety of environments throughout the world. They are particularly dangerous to life and property because they move quickly, destroy objects in their p |
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Older landslides (before Hurricane Mitch) in El Salvador
This cover contains the outlines of selected landslides and debris flows that occurred prior to Hurricane Mitch in the areas where hurricane-induced landslides were mapped. The landslides and debris flows shown in this coverage were mapped using 1:40,00- |
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Older landslides in Castillo San Felipe quadrangle, Guatemala
This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 p |
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Older landslides in Cobán quadrangle, Guatemala
This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 p |
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Older landslides in Entre Ríos quadrangle, Guatemala
This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 p |
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Older landslides in La Tinta quadrangle, Guatemala
This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 p |
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Older landslides in La Unión quadrangle, Guatemala
This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 p |
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Older landslides in Panzós quadrangle, Guatemala
This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 p |
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Older landslides in Pueblo Viejo quadrangle, Guatemala
This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 p |
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Older landslides in Río Hondo quadrangle, Guatemala
This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 p |
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Older landslides in Senahú quadrangle, Guatemala
This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 p |
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Older landslides in Sierra de las Minas quadrangle, Guatemala
This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 p |
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Older landslides in Tactic quadrangle, Guatemala
This cover contains the outlines of recent landslides formed prior to Hurricane Mitch in October - November 1998. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 p |
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Possible Costs Associated with Investigating and Mitigating Some Geologic Hazards in Rural Parts of San Mateo County, California
This publication addresses deep-seated landslide susceptibility, debris flow susceptibility, and other geologic hazards in rural parts of western San Mateo County. The report also estimates possible costs of investigating and mitigating the landslide haz |
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Preliminary Geologic Description of the San Jose 30 X 60 Minute Quadrangle, California: A Digital Database
The San Jose 30 x 60-minute quadrangle straddles the California Coast Ranges southeast of San Francisco, and extends from west of the San Andreas fault near Santa Cruz on the southwest (long. -122°, lat. 37°) to the San Joaquin River in the Central Vall |
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Preliminary Geologic Map of the San Bernardino 30' x 60' quadrangle, California
The San Bernardino 30'x60' quadrangle, southern California, is diagonally bisected by the San Andreas Fault Zone, separating the San Gabriel and San Bernardino Mountains, major elements of California's east-oriented Transverse Ranges Province. Included i |
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Preliminary geologic map of the Elsinore 7.5' quadrangle, Riverside County, California
The Elsinore quadrangle is located in the northern part of the Peninsular Ranges Province and includes parts of two structural blocks, or structural subdivisions of the province. The active Elsinore Fault Zone diagonally crosses the southwest corner of t |
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Preliminary map of selected post-Nevadan geologic features of the Klamath Mountains and adjacent areas, California and Oregon: A digital database
This map of selected post-Nevadan features is in a sense supplementary to Map I-2148 (Geologic map of the Klamath Mountains, compiled by W.P. Irwin, 1994). The map of selected post-Nevadan geologic features is in large part a compilation of the published |
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Preliminary maps of Quaternary deposits and liquefaction susceptibility, nine-county San Francisco Bay region, California: a digital database
This report presents a preliminary map and database of Quaternary deposits and liquefaction susceptibility for the nine-county San Francisco Bay region, together with a digital compendium of ground effects associated with past earthquakes in the region. T |
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Preliminary soil-slip susceptibility maps, southwestern California
This data set maps the soil-slip susceptibility for several areas in southwestern California. Created using Environmental Systems Research Institute's ARC/INFO software, the data base consists of raster maps containing grid cells coded with soil- slip su |
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Principal Facts for Gravity Stations in the Vicinity of San Bernardino, Southern California
New gravity measurements in the vicinity of San Bernardino, California were collected to help define the characteristics of the Rialto-Colton fault. The data were processed using standard reduction formulas and parameters. Rock properties such as lithol |
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Quaternary Geology and Liquefaction Susceptibility, San Francisco, California 1:100,000 Quadrangle: A digital database
In this study, we develop a liquefaction susceptibility map of the San Francisco 1:100,000 quadrangle using Quaternary geologic mapping, historical liquefaction information, groundwater data, and previous studies. |
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Quaternary geologic map of the Winnipeg 4° × 6° quadrangle, United States and Canada
The Quaternary Geologic Map of the Winnipeg 4° × 6° Degree Quadrangle, United States and Canada, is a component of the U.S. Geological Survey Quaternary Geologic Atlas of the United States map series (Miscellaneous Investigations Series I-1420), an eff |
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Quaternary geology and liquefaction susceptibility, Napa, California 1:100,000 quadrangle: A digital database
This Open-File report consists of a digital geologic map database and associated digital plot files and text files, revised from a hard copy by Sowers and others (1995). This digital map database provides current information on Quaternary geology and liq |
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San Francisco Bay Region Landslide Folio Part E - Map of debris-flow source areas in the San Francisco Bay region, California
These maps show, for emergency service managers in the San Francisco Bay region, the threshold rainfall that may be capable of triggering a level of debris-flow activity likely to threaten public safety. The maps are products of a continuing series of |
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San Francisco Bay Region landslide folio part E - Map of debris-flow source areas in the San Francisco Bay region, California
This map identifies the principal areas in the San Francisco Bay region that are likely to produce debris flows, which are also called "mudslides." Debris flows that occur in the bay region are fast-moving downslope flows of mud that may include rocks, |
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San Francisco Bay region landslide folio part C - Summary distribution of slides and earth flows in the San Francisco Bay region, California
The distribution of landslides evident in the landscape -- most of which are slumps, translational slides, and earth flows -- is of interest both for evaluation of hazard and risk and for use in further study of landslides. Future movement of such landsli |
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San Francisco Bay region landslide folio part D - Index to detailed maps of landslides in the San Francisco Bay region, California
A table keyed to 171 topographic quadrangles on a new 1:275,000-scale shaded-relief map speeds access to information on landslide locations in the ten-county San Francisco Bay region. Detailed maps showing individual landslides in nearly any area of inter |
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Seismic Landslide Hazard for the Cities of Oakland and Piedmont, California
This map describes the possible hazard from earthquake-induced landslides for the cities of Oakland and Piedmont, CA. The hazard depicted by this map was modeled for a scenario corresponding to an M=7.1 earthquake on the Hayward, CA fault. This scenario |
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Seismic Landslide Hazard for the City of Berkeley, California
This map describes the possible hazard from earthquake-induced landslides for the city of Berkeley, CA. The hazard depicted by this map was modeled for a scenario corresponding to an M=7.1 earthquake on the Hayward, CA fault. This scenario magnitude is |
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Seismic-Hazard Maps for Alaska and the Aleutian Islands: 1HZ050
Probabilistic seismic hazard maps were prepared for Alaska portraying peak horizontal ground acceleration and horizontal spectral response acceleration for 0.2, 0.3, and 1.0 second periods with probabilities of exceedance of 10% in 50 years and 2% in 50 y |
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Seismic-Hazard Maps for Alaska and the Aleutian Islands: 1HZ250
Probabilistic seismic hazard maps were prepared for Alaska portraying peak horizontal ground acceleration and horizontal spectral response acceleration for 0.2, 0.3, and 1.0 second periods with probabilities of exceedance of 10% in 50 years and 2% in 50 y |
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Seismic-Hazard Maps for Alaska and the Aleutian Islands: 3HZ050
Probabilistic seismic hazard maps were prepared for Alaska portraying peak horizontal ground acceleration and horizontal spectral response acceleration for 0.2, 0.3, and 1.0 second periods with probabilities of exceedance of 10% in 50 years and 2% in 50 y |
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Seismic-Hazard Maps for Alaska and the Aleutian Islands: 3HZ250
Probabilistic seismic hazard maps were prepared for Alaska portraying peak horizontal ground acceleration and horizontal spectral response acceleration for 0.2, 0.3, and 1.0 second periods with probabilities of exceedance of 10% in 50 years and 2% in 50 y |
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Seismic-Hazard Maps for Alaska and the Aleutian Islands: 5HZ050
Probabilistic seismic hazard maps were prepared for Alaska portraying peak horizontal ground acceleration and horizontal spectral response acceleration for 0.2, 0.3, and 1.0 second periods with probabilities of exceedance of 10% in 50 years and 2% in 50 y |
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Seismic-Hazard Maps for Alaska and the Aleutian Islands: 5HZ250
Probabilistic seismic hazard maps were prepared for Alaska portraying peak horizontal ground acceleration and horizontal spectral response acceleration for 0.2, 0.3, and 1.0 second periods with probabilities of exceedance of 10% in 50 years and 2% in 50 y |
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Seismic-Hazard Maps for Alaska and the Aleutian Islands: PGA050
Probabilistic seismic hazard maps were prepared for Alaska portraying peak horizontal ground acceleration and horizontal spectral response acceleration for 0.2, 0.3, and 1.0 second periods with probabilities of exceedance of 10% in 50 years and 2% in 50 y |
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Seismic-Hazard Maps for Alaska and the Aleutian Islands: PGA250
Probabilistic seismic hazard maps were prepared for Alaska portraying peak horizontal ground acceleration and horizontal spectral response acceleration for 0.2, 0.3, and 1.0 second periods with probabilities of exceedance of 10% in 50 years and 2% in 50 y |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Damaging Earthquakes
This cover consists of location and size information for historical and recent earthquakes that caused Modified Mercalli Intensity (MMI) VI (6) or higher in the map area. There were 26 earthquakes that caused that level of damage. The most reknown are the |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Instrumental earthquake locations
This cover contains the catalog of earthquake locations, within the project boundary, recorded by the Saint Louis University and Memphis State University seismic networks from July 1974 through December 1995. |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Locations of stress orientations
NOTE: Location of one point, near -88.65, 38.95, was incorrect when Sheet A was published. The location is .5 degree south, and is corrected in this dataset. This cover contains locations of places where greatest horizontal compressive stress (S(Hmax)) o |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Modified Mercalli Intensity contours for the earthquakes from December 16, 1811 at 815 GMT through June 10, 1987 at 2348 GMT
Isoseismals of historic Central U.S. earthquakes are contained in 26 separate coverages. Margaret Hopper provided these isoseismals after reexamining the intensity data and re-calculating the isoseismal contours. She generated isoseismal contours for eac |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Neotectonic features
Although many faults are detected at the surface and in deep structures, they are important in evaluating present seismic hazard only if they show evidence of having recent slip. Older faults may have healed, or movement may have occurred under a differen |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Paleoliquefaction locations between 1990 and 1994 in Illinois
The northern part of the map area and large adjacent regions have been severely shaken by one or more moderate to large prehistoric earthquakes. The evidence of these takes the form of paleoliquefaction features, including shaking-induced sandblows and di |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Paleoliquefaction locations observed in 1995 in Illinois
The northern part of the map area and large adjacent regions have been severely shaken by one or more moderate to large prehistoric earthquakes. The evidence of these takes the form of paleoliquefaction features, including shaking-induced sandblows and di |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Paleoliquefaction observations between 1990 and 1994 in Indiana
The northern part of the map area and large adjacent regions have been severely shaken by one or more moderate to large prehistoric earthquakes. The evidence of these takes the form of paleoliquefaction features, including shaking-induced sandblows and di |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Paleoliquefaction surveys between 1990 and 1994
Note: this cover is a combination of liq94surv and liqmunsurv. The northern part of the map area and large adjacent regions have been severely shaken by one or more moderate to large prehistoric earthquakes. The evidence of these takes the form of paleoli |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Paleoliquefaction surveys between 1990 and 1994 in Illinois
Over several summer field seasons from 1990 through 1994, several workers searched ditches and river banks for evidence of liquefaction. They found numerous banks with shaking-induced, pre-historic, earthquake induced sandblows and the dikes that fed them |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Paleoliquefaction surveys between 1990 and 1994 in Indiana
The northern part of the map area and large adjacent regions have been severely shaken by one or more moderate to large prehistoric earthquakes. The evidence of these takes the form of paleoliquefaction features, including shaking-induced sandblows and di |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Paleoliquefaction surveys in 1995 in Illinois
Over several summer field seasons from 1990 through 1994, several workers searched ditches and river banks for evidence of prehistoric earthquake liquefaction. They found numerous banks with shaking-induced sandblows and the dikes that fed them. "liq94sur |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Reported Modified Mercalli Intensity values
This cover contains locations with intensity values associated with felt reports from damaging earthquakes in the lower Wabash Valley occurring from 1811 through 1987. Margaret Hopper collated these data from historical data gathered from previous resear |
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Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Strong Motion Program station locations
This cover contains locations of strong motion accelerograph instruments located in the lower Wabash Valley. The instruments are operated by Lamont-Doherty Geological Observatory, the University of Kentucky, and the U.S. Army Corps of Engineers Strong Mot |
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Seismotectonic maps in the vicintiy of New Madrid, Missouri database
This digital map database consists of the ESRI ARC/INFO Version 7.0.3 coverages used to generate the maps in Map Series MF-2264 A to E (Rhea and Wheeler, 1994a,b, Rhea and others, 1994, Wheeler and Rhea, 1994, Wheeler and others, 1994) and I-2521 (Rhea an |
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Spatial Digital Database for the Tectonic Map of Southeast Arizona
A spatial database was created for the Drewes (1980) tectonic map of southeast Arizona: this database supercedes Drewes and others (2001, ver. 1.0). The west tectonic map (Drewes, 1980) was converted to digital format by Optronics Specialty Co., Inc. and |
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Surficial geologic map of parts of the Misheguk Mountain and Baird Mountains quadrangles, Noatak National Preserve, Alaska
This dataset represents surficial geologic mapping of parts of the Misheguk Mountain and Baird Mountains quadrangles containing the Noatak National Preserve. It is used to create the mapsheet in 03-367, which shows surficial deposits of the 1:250,000 sca |
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Tectonic Map of the Death Valley Ground-Water Model Area, Nevada and California
This digital geologic and tectonic database of the Death Valley ground-water model area, as well as its accompanying geophysical maps, are compiled at 1:250,000 scale. The map compilation presents new polygon, line, and point vector data for the Death Va |
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Younger landslides in Río Hondo quadrangle, Guatemala
This cover contains the outlines landslides formed after Hurricane Mitch in September 1999. Jeffrey Coe and Robert Bucknam mapped the landslides. Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 photogrammetric plotter |
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