HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) References Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by COLLINS, M. P. Search for Related Content

Local earthquakes in New England^*

CAMBRIDGE, MASSACHUSETTS

Abstract

During 1934 and 1935, records of approximately 150 definitely local disturbances were obtained on the Benioff seismographs at the Harvard Seismograph Station. Because of a curious concentration in the daytime hours and the few earthquakes reported felt during this interval, an attempt was made to establish criteria by which records of blasts and of local earthquakes might be distinguished from each other. Three, the ratio of the maximum P to the maximum S, the character of the surface waves, and the angle of emergence are discussed. The records of 32 of these disturbances, well recorded on all three Benioff components, are described. It is concluded that, although some of New England's seismic activity is artificial, there is, nevertheless, a greater amount of natural activity than is ordinarily attributed to this region.

Footnotes

^* Manuscript received for publication December 7, 1936.