Seismicity map of the State of Maine

The earthquake data for the state of Maine shown on this map and listed in table 1 was taken from the U.S. Geological Survey catalog of earthquakes (Hays, and others, 1975).  This list of earthquakes was originally compiled for use in preparing the Seismic Risk Studies in the United States (Algermissen, 1969) and has been updated through 1974.  The catalog is reasonably complete through 1974; possible discrepancies with existing publications may exist, however, because the file was compiled over a long period of time and by a number of compilers.