Bedrock Geologic Map of the Windham Quadrangle, Rockingham and Hillsborough Counties, New Hampshire: Linear geologic features

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Description Line coverage for geologic lines including isograds, axial traces, cross-section lines, etc.. Includes annotation for geologic names such as plutons and locations for sample sites. The geologic data was mapped during the summer of 1998 at a scale of 1:24
Originators Walsh, Gregory J. and Clark, Stewart F., Jr.
Publication U.S. Geological Survey Open-File Report 99-8

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location and size parameters of damaging earthquakes in the lower Wabash Valley

Label Definition
LAT latitude north, location of earthquake
LONG longitude west, location of earthquake
YEAR year of earthquake occurrence
MONTH month of earthquake occurrence
DAY day of earthquake occurrence
HR hr of earthquake occurrence
MIN min of earthquake occurrence
MAG magnitude of earthquake
SYMBOL symbol used to portray earthquake on map
SMALLSYM symbol used to portray earthquake on map
BSYMBOL symbol used to portray earthquake on map B