Accession Number:

AD0787874

Title:

Studies of Long-Period Seismic Noise Generated by Atmospheric Pressure Changes

Descriptive Note:

Interim technical rept. 1 Apr 1973-31 Mar 1974

Corporate Author:

TELEDYNE GEOTECH GARLAND TX

Personal Author(s):

Report Date:

1974-08-01

Pagination or Media Count:

42.0

Abstract:

Potential contribution of atmospheric pressure sources other than the wind to the seismic noise spectrum in the 20-100 second period range was studied. Results indicate that during calm intervals in the winter months, pressure related earth motion makes a substantial contribution to the observed earth noise spectrum. This contribution becomes detectable at periods on the order of 25 seconds and becomes the principal source of ambient earth motion at periods greater than 50-60 seconds. The evidence to date strongly suggests that the pressure related earth motion is derived principally from naturally occurring atmospheric infrasonic waves.

Subject Categories:

  • Atmospheric Physics
  • Seismology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE