Earthquake history of the United States, revised edition (through 1970), with supplement (1971-1980)

This publication is a history of the prominent earthquakes in the United States from historical times to 1980. For the purpose of listing and describing earthquakes, the United States has been divided into nine regions; (1) Northeastern Region, which includes New England and New York activity and observations of the principal earthquakes of eastern Canada; (2) Eastern Region, including the central Appalachian seismic region activity and the area near Charleston, S.C.; (3) Central Region, which consists of the area between the region just described and the Rocky Mountians; (4) Western Mountain Region, which includes all remaining states except those on the Pacific Coast; (5) Washington and Oregon; (6) Alaska; (7) Hawaii; (8) Puetro Rico; and (9) California and Western Nevada. This arrangement has been made chiefly with reference to the natural seismic divisions.