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Bulletin of the Seismological Society of America; June 1998; v. 88; no. 3; p. 744-757
© 1998 Seismological Society of America
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Spectral structure in the earth's microseismic background between 20 and 40 seconds

L. Gary Holcomb

Albuquerque Seismological Laboratory U.S. Geological Survey, Building 10002, KAFB East, Albuquerque, New Mexico 87115gary{at}asl.cr.usgs.gov

Abstract

The long-term behavior of a narrow band peak near 26 sec in the microseismic background of the Earth has been studied over many years at several sites. The amplitude of this peak has been determined to be a function of the Earth's weather seasons; it is larger during the southern hemisphere winter. In addition, the microseismic background between 20 and 40 sec has been scanned for peaks in the spectra; three more lower-level peaks have been identified with the possible presence of more.






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