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Bulletin of the Seismological Society of America; April 1972; v. 62; no. 2; p. 471-479
© 1972 Seismological Society of America
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New noise-reduction technique applied to long-period oscillations from the Alaskan earthquake

RALPH A. WIGGINS* and STEPHEN P. MILLER

DEPARTMENT OF EARTH AND PLANETARY SCIENCES MASSACHUSETTS INSTITUTE OF TECHNOLOGY, CAMBRIDGE, MASSACHUSETTS 02139

Abstract

We develop a method of noise reduction for seismological data in which bursts of noise are detected and replaced with the use of a prediction error operator. The method is applied to the Alaskan earthquake gravimeter record of Slichter. Nearly all long-period energy can be attributed to transient noise in the signal. There is no evidence for a long-period core oscillation.

Footnotes

* Present address: Department of Physics, University of Toronto, Toronto 181, Ontario, Canada.




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