Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Seismic refraction lines

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Frequently anticipated questions:

What does this data set describe?

Title:
Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Seismic refraction lines
Abstract:
This cover includes seismic refraction lines that have geophysical cross sectional interpretations constraining subsurface structures that may penetrate to hypocentral depths. Lines were gathered from theses, dissertations, and publications.
  1. How might this data set be cited?
    Rhea, Susan, 1997, Seismotectonic maps in the vicinity of the lower Wabash Valley, Illinois, Indiana, and Kentucky - Digital Spatial Database: Seismic refraction lines: U.S. Geological Survey Open-File Report 97-0681, U.S. Geological Survey, Denver,CO.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -89.000
    East_Bounding_Coordinate: -87.000
    North_Bounding_Coordinate: 39.000
    South_Bounding_Coordinate: 37.884
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 1980
    Ending_Date: 1994
    Currentness_Reference:
    all discovered lines are included
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: map
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • Point (0)
      • String (10)
      • GT-polygon composed of chains (0)
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitude and longitude values are specified in Decimal Degrees. The horizontal datum used is Unknown.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
  7. How does the data set describe geographic features?
    REFRAC.AAT
    code for line name used on map and reference (Source: Rhea)
    LINE
    code for line name (Source: Rhea)
    ValueDefinition
    B1 
    B2 
    B3 
    B4 
    B5 
    B6 
    B7 
    B8 
    HLB 
    HLDrefraction line name
    REF
    code for reference sources (Source: Rhea)
    ValueDefinition
    Baldwin 1980 
    Heigold & Larson 1994year and author

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Rhea, Susan
  2. Who also contributed to the data set?
    Sharon Diehl
  3. To whom should users address questions about the data?
    Susan Rhea
    US Geological Survey
    Geophysicist
    MS966, Box 25046, Federal Center
    Denver, CO
    USA

    303-273-8639 (voice)
    303-273-8600 (FAX)
    rhea@usgs.gov
    Contact_Instructions: email is the best way to make contact

Why was the data set created?

The data was generated to help in understanding the seismotectonic hazards in the vicinity of the lower Wabash Valley. This data complements similar data collected in the vicinity of New Madrid, MO US Geological Survey Open-File Report 95-0574, available at http://pubs.usgs.gov/of/1995/0574/

How was the data set created?

  1. From what previous works were the data drawn?
    (source 1 of 2)
    Baldwin, J.L., 1980, A crustal seismic refraction study in southwestern Indiana and southern Illinois: Purdue University Masters thesis, Purdue University, West Lafayette, IN.

    Other_Citation_Details: 99 p.
    (source 2 of 2)
    Heigold, P.C., and Larsen, T.H., 1994, Geophysical investigations of possible recent ground deformation and neotectonism in White County, Illinois: Illinois State Geological Survey Open-File Series 1994-5, Illinois State Geological Survey, Illinois.

    Other_Citation_Details: Series 1994-5, 22 p.
    Type_of_Source_Media: paper
  2. How were the data generated, processed, and modified?
    Date: 07-Aug-1996 (process 1 of 2)
    Latitude and longitude data for end points of lines B1 to B8 were generated from a 200% blow-up of Figure 10, an index map at 1:3.6 million, from Baldwin (1980). Refraction sources were located at 5 coal strip mines. Lengths and vectors of the lines were estimated from the mine sources on the index map and plotted on a 1:100,000 topographic map.
    End points of lines HLD and HLB were digitized from Figure 8 in Heigold and Larson (1994).
    refrac_all was clipped to the published map boundary to create refrac.
    Date: 06-May-1998 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    Susan Rhea
    US Geological Survey
    Geophysicist
    MS966, Box 25046, Federal Center
    Denver, CO
    USA

    303-273-8639 (voice)
    303-273-8600 (FAX)
    rhea@usgs.gov
    Contact_Instructions: email is the best way to make contact
  3. What similar or related data should the user be aware of?
    Wheeler, R.L., Diehl, S.F., Rhea, Susan, Sargent, M.L., Bear, G.W., 1997, Map showing selected wells and geophysical survey and modeling lines in the vicinity of the lower Wabash Valley, Illinois, Indiana, Kentucky: U.S. Geological Survey Miscellaneous Investigations Series Map I-2583-C, U.S. Geological Survey, Denver, CO.

    Other_Citation_Details: pamphlet accompanies map

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    The attribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section.
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    all discovered data included
  5. How consistent are the relationships among the observations, including topology?
    Chain-node topology present.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: none
Use_Constraints: none
  1. Who distributes the data set? (Distributor 1 of 1)
    Susan Rhea
    US Geological Survey
    Geophysicist
    USGS Mail Stop 966
    Box 25046, Federal Center
    Denver, CO
    USA

    303-273-8639 (voice)
    303-273-8600 (FAX)
    rhea@usgs.gov
    Contact_Instructions: Email is the best way to make contact.
  2. What's the catalog number I need to order this data set? USGS Open-File Report 97-0681
  3. What legal disclaimers am I supposed to read?
    This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Any use of trade names is for descriptive purposes only and does not imply endorsement by the USGS.
  4. How can I download or order the data?
  5. What hardware or software do I need in order to use the data set?
    ARC/INFO version 7.0.3 or later or ArcView 3.0 or later

Who wrote the metadata?

Dates:
Last modified: 10-Jun-2016
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA
USA

703-648-6533 (voice)
703-648-6252 (FAX)
pschweitzer@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/97-681/refrac.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:07:01 2018