L.M. Barnhard B.G. Reagor S. T. Algermissen C. W. Stover 1981 <p>The earthquake data shown on this map and listed in table 1 are a list of earthquakes that were originally used in preparing the Seismic Risk Studies in the United States (Algermissen, 1969) which have been recompiled and updated through 1977. &nbsp;These data have been reexamined which resulted in some revisions of epicenters and intensities as well as assignment of intensities to earthquakes that previously had none assigened. &nbsp;Intensity values were updated from new and additional data soureces that were not available at the time of original compilation. &nbsp;Some epicenters were relocated on the basis of new informaition. &nbsp;The data shown in table 1 are estimates of the most accurate epicenter, magnitude, and intensity of each earthquake, on the basis of historical and current information. &nbsp;Some of the aftershocks from large earthquakes are listed but are incomplete in many instances, especialy for ones that occurred before seismic instruments were in universal usage. &nbsp;Only earthquakes located within the borders of the states of Maine are listed. &nbsp;This map superceeds Miscellaneous Field Sudies Map MF-845.</p> application/pdf 10.3133/mf1284 en U.S. Geological Survey Seismicity map of the State of Maine reports