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Effects of 3D attenuation on seismic wave amplitude and phase measurements

Brian Savage, Dimitri Komatitsch and Jeroen Tromp
Effects of 3D attenuation on seismic wave amplitude and phase measurements
Bulletin of the Seismological Society of America (June 2010) 100 (3): 1241-1251

Abstract

We incorporate 3D anelastic attenuation into the spectral-element method for seismic wave propagation. This advancement accommodates lateral variations in anelasticity on global, regional, or local scales. We use the method to investigate the effects of anelasticity in an upper mantle attenuation model in conjunction with a global wave-speed model and in a regional subduction zone model. These investigations reveal substantial and competing amplitude anomalies due to elastic and anelastic variations, but rather minor anelastic effects on the travel times of seismic waves. Seismic studies utilizing amplitude data must therefore consider elastic and anelastic heterogeneity in tandem to avoid mapping one type of heterogeneity into the other.


ISSN: 0037-1106
EISSN: 1943-3573
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 100
Serial Issue: 3
Title: Effects of 3D attenuation on seismic wave amplitude and phase measurements
Affiliation: University of Rhode Island, Kingston, RI, United States
Pages: 1241-1251
Published: 201006
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 46
Accession Number: 2010-059086
Categories: Solid-earth geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. sketch maps
S19°19'60" - S16°00'00", W178°00'00" - E177°00'00"
S23°00'00" - S15°00'00", W177°00'00" - W171°00'00"
Secondary Affiliation: Universite de Pau et des Pays de l'Adour, FRA, FrancePrinceton University, USA, United States
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: 201032
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