On the validation of seismic imaging methods: Finite frequency or ray theory?
Abstract
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:
-
- Earth and Environmental Sciences Division Los Alamos National Laboratory Los Alamos New Mexico USA
- Department of Earth Sciences University of Southern California Los Angeles California USA, Department of Earth and Planetary Science University of California Berkeley California USA
- Department of Earth and Planetary Science University of California Berkeley California USA
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1240467
- Alternate Identifier(s):
- OSTI ID: 1212465; OSTI ID: 1240468
- Grant/Contract Number:
- DE‐AC52‐06NA25396/LA12‐SignalPropagation‐NDD2Ab; AC52-06NA25396
- Resource Type:
- Journal Article: Published Article
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Name: Geophysical Research Letters Journal Volume: 42 Journal Issue: 2; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union (AGU)
- 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. https://doi.org/10.1002/2014GL062571
Maceira, Monica, Larmat, Carene, Porritt, Robert W., Higdon, David M., Rowe, Charlotte A., and Allen, Richard M. 2015.
"On the validation of seismic imaging methods: Finite frequency or ray theory?". United States. https://doi.org/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 = {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.},
doi = {10.1002/2014GL062571},
url = {https://www.osti.gov/biblio/1240467},
journal = {Geophysical Research Letters},
issn = {0094-8276},
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}
}
Web of Science
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