High Frequency P Wave Attenuation and Degradation of Detection Capability by Large Earthquakes.
Abstract
This report describes two distinct seismological studies. The first is 'High Frequency P Wave Attenuation Along Five Teleseismic Paths from Central Asia.' P Wave spectra from E. Kazakhstan explosions recorded at five arrays are computed for all five paths using an absorption band model. The Q exhibits strong frequency dependence in the band from 0.5 to 3 Hz, and is nearly the same for all five paths. The second study is, 'An Investigation of the Degradation of Teleseismic Detection Capability Caused by Large Earthquakes.' A ten year global seismicity bulletin is searched to determine the extent to which large earthquakes inhibit the detection of small earthquakes occurring a short time thereafter. Significant degradation of the detection capability of the 115 station global network contributing to the bulletin is seen for periods up to an hour for earthquakes of M sub b 5.8 and larger.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 05, 1985
- Accession Number
- ADA164733
Entities
People
- Steven R. Bratt
- Thomas C. Bache
Organizations
- Leidos