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 HighWire Citing Articles via Google Scholar Google Scholar Articles by LINEHAN, D. Search for Related Content GeoRef GeoRef Citation

The Chelmsford, Massachusetts, earthquake of June 23, 1938^*

SEISMOLOGICAL OBSERVATORY, WESTON COLLEGE

Abstract

The Chelmsford earthquake of June 23, 1938, occurred at 03^h 57^m 56^s.5 G.C.T. The epicentral determination made by the writer of this article is 71° 25' W, 42° 37' N. The distance-arcual intersection occurs at the southernmost tip of an ellipse of greatest intensity, and this may be due to the fact that all three stations employed in the determination were to the south and west of the area, or that structural conditions elongated the greatest intensity area. The major axis of the ellipse does coincide with the strike of the geologic structure in this area. The greatest intensity given by the writer is IV on the Rossi-Forel Scale.

Footnotes

^* Manuscript received for publication September 13, 1939.

This article has been cited by other articles:

				J. G. ANDERSON On the attenuation of Modified Mercalli Intensity with distance in the United States Bulletin of the Seismological Society of America, August 1, 1978; 68(4): 1147 - 1179. [Abstract] [PDF]