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Title: On the validation of seismic imaging methods: Finite frequency or ray theory?

Abstract

We investigate the merits of the more recently developed finite-frequency approach to tomography against the more traditional and approximate ray theoretical approach for state of the art seismic models developed for western North America. To this end, we employ the spectral element method to assess the agreement between observations on real data and measurements made on synthetic seismograms predicted by the models under consideration. We check for phase delay agreement as well as waveform cross-correlation values. Based on statistical analyses on S wave phase delay measurements, finite frequency shows an improvement over ray theory. Random sampling using cross-correlation values identifies regions where synthetic seismograms computed with ray theory and finite-frequency models differ the most. Our study suggests that finite-frequency approaches to seismic imaging exhibit measurable improvement for pronounced low-velocity anomalies such as mantle plumes.

Authors:
 [1];  [1];  [2];  [1];  [1];  [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Earth and Environmental Sciences Division.
  2. University of Southern California, Los Angeles, CA (United States). Department of Earth Sciences; Univ. of California, Berkeley, CA (United States). Dept. of Earth and Planetary Science.
  3. Univ. of California, Berkeley, CA (United States). Dept. of Earth and Planetary Science.
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1240467
Alternate Identifier(s):
OSTI ID: 1212465; OSTI ID: 1240468
Grant/Contract Number:
AC52-06NA25396; AC52-06NA25396/LA12-SignalPropagation-NDD2Ab; 116467
Resource Type:
Journal Article: Published Article
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 42; Journal Issue: 2; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES

Citation Formats

Maceira, Monica, Larmat, Carene, Porritt, Robert W., Higdon, David M., Rowe, Charlotte A., and Allen, Richard M. On the validation of seismic imaging methods: Finite frequency or ray theory?. United States: N. p., 2015. Web. doi:10.1002/2014GL062571.
Maceira, Monica, Larmat, Carene, Porritt, Robert W., Higdon, David M., Rowe, Charlotte A., & Allen, Richard M. On the validation of seismic imaging methods: Finite frequency or ray theory?. United States. doi:10.1002/2014GL062571.
Maceira, Monica, Larmat, Carene, Porritt, Robert W., Higdon, David M., Rowe, Charlotte A., and Allen, Richard M. Fri . "On the validation of seismic imaging methods: Finite frequency or ray theory?". United States. doi:10.1002/2014GL062571.
@article{osti_1240467,
title = {On the validation of seismic imaging methods: Finite frequency or ray theory?},
author = {Maceira, Monica and Larmat, Carene and Porritt, Robert W. and Higdon, David M. and Rowe, Charlotte A. and Allen, Richard M.},
abstractNote = {We investigate the merits of the more recently developed finite-frequency approach to tomography against the more traditional and approximate ray theoretical approach for state of the art seismic models developed for western North America. To this end, we employ the spectral element method to assess the agreement between observations on real data and measurements made on synthetic seismograms predicted by the models under consideration. We check for phase delay agreement as well as waveform cross-correlation values. Based on statistical analyses on S wave phase delay measurements, finite frequency shows an improvement over ray theory. Random sampling using cross-correlation values identifies regions where synthetic seismograms computed with ray theory and finite-frequency models differ the most. Our study suggests that finite-frequency approaches to seismic imaging exhibit measurable improvement for pronounced low-velocity anomalies such as mantle plumes.},
doi = {10.1002/2014GL062571},
journal = {Geophysical Research Letters},
number = 2,
volume = 42,
place = {United States},
year = {Fri Jan 23 00:00:00 EST 2015},
month = {Fri Jan 23 00:00:00 EST 2015}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1002/2014GL062571

Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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