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Microseism ground motion at Palisades and Weston

LAMONT GEOLOGICAL OBSERVATORY (COLUMBIA UNIVERSITY)

Abstract

An analysis of microseism ground motion at Palisades and Weston is made on the basis of both statistical and individual wave studies. Data from three-component seismographs are utilized for the study of six microseism storms. The results of both methods of ground-motion analysis show that the microseisms studied for Palisades and Weston are either pure Rayleigh waves or combinations of Rayleigh waves approaching from different directions. The study also tends to support earlier findings of Lee that a relationship seems to exist between certain microseism parameters and local geology. The use of the data to determine wave-approach directions on the assumption of Rayleigh waves supports earlier reports of refraction at the continental borders, and gives further evidence for the existence of a microseism discontinuity at the margin of the continent in the vicinity of Long Island.

Footnotes

^* Manuscript received for publication February 2, 1953.