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A comparison of the seismicity of three regions of the Eastern U.S.^*

APPLIED SEISMOLOGY GROUP LINCOLN LABORATORY, M.I.T., 42 CARLETON STREET, CAMBRIDGE, MASSACHUSETTS 02142

Abstract

Frequency-intensity data from the Southeastern U.S., Central Mississippi Valley, and Southern New England are compared. They are all quite parallel to one another and consistent with a slope of about 0.57. There is no evidence for the existence of upper bounds to maximum epicentral intensity in these data sets. Linear extrapolation of the frequency-intensity data to intensities of X leads to expected probabilities for the occurrence of large earthquakes. The largest events which have occurred in these three regions are consistent with these probabilities.

Footnotes

^* The views and conclusions contained in this document are those of the contractor and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the United States Government.

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