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Estimation of radiated energy using the EGF technique; what should be the upper limit of integration in the frequency domain?

A. Iglesias and S. K. Singh
Estimation of radiated energy using the EGF technique; what should be the upper limit of integration in the frequency domain?
Bulletin of the Seismological Society of America (August 2007) 97 (4): 1346-1349

Abstract

The empirical Green's function (EGF) technique is frequently used to estimate the radiated seismic energy, E (sub R) , of an earthquake. An approximation of the moment-rate spectrum, M (sub 0) (f), of the target earthquake is obtained from the ratio of the spectrum of the target earthquake to the spectrum of the EGF earthquake, and the radiated seismic energy is computed by integrating Formula over frequency f. The choice of the upper limit of integration, f (sub u) , is critical. In this note we show that the optimum choice of f (sub u) for the omega (super 2) -source model is given by f (sub u) /fc (sub 1) approximately fc (sub 2) /fc (sub 1) , where fc (sub 1) and fc (sub 2) are the corner frequencies of the target and the EGF earthquakes, respectively. This result provides a useful guide in the application of the EGF technique to obtain a reliable estimate of the radiated seismic energy.


ISSN: 0037-1106
EISSN: 1943-3573
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 97
Serial Issue: 4
Title: Estimation of radiated energy using the EGF technique; what should be the upper limit of integration in the frequency domain?
Affiliation: Universidad Nacional Autonoma de Mexico, Departamento de Sismologia , Instituto de Geofisica, Mexico City, Mexico
Pages: 1346-1349
Published: 200708
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 14
Accession Number: 2007-095028
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 200742
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