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ABSTRACTS | ABSTRACT DETAILS

 

Author:Rodney Whitaker
Institution:EES-2 MS J577, LANL, Los Alamos, NM 87544
Email:rww@lanl.gov
Authors:Rodney Whitaker and J. Paul Mutschlecner
Abstract Title:

"INFRASONIC OBSERVATIONS OF EARTHQUAKES"
Abstract:

Infrasound signals have been detected from numerous earthquakes at arrays operated by the Los Alamos National Laboratory during a period of over twenty years. These observations have been analyzed to determine the signal characteristics and their relation to earthquake properties. Most of the detected earthquakes have been in California but others have been as far away as Alaska. The observed amplitudes scaled for the effects of propagation (distance and upper level winds) indicate a dependence upon seismic magnitude. However the analysis and statistical simulations taking into account error sources suggest that seismic properties in addition to magnitude also may play an important role in determining the variation in signal strength. Signal duration also appears to be related to seismic magnitude. The analysis examines other infrasound properties including frequency content and propagation properties.
Keywords:infrasound, earthquakes and signal processing

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