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4-D imaging of subsurface changes with coda waves: numerical studies of 3-D combined sensitivity kernels and applications to the Mw7.9, 2008 Wenchuan earthquake
Abstract : In the context of seismic monitoring, recent studies made successful use of seismic coda waves to image the lateral extent of medium changes. Locating the depth of the changes, however, remains a challenge. We use multiply-scattered body-and surface wave 3-D combined sensitivity kernels to address this problem. We show that we can locate velocity perturbations at depth with numerical data from elastic wave-field simulations in 3-D heterogeneous media. This procedure is then applied to assess the extent of the crustal damage due to the M w 7.9, 2008 Wenchuan earthquake. We discuss the potential and limitations of our approach to retrieve the depth information of temporal changes occurring in heterogeneous structures.
Cited literature [66 references]
https://hal-cnrs.archives-ouvertes.fr/hal-02264394
Contributor : Eric Larose Connect in order to contact the contributor
Submitted on : Tuesday, August 6, 2019 - 9:10:18 PM
Last modification on : Wednesday, November 3, 2021 - 5:13:15 AM
Long-term archiving on: : Thursday, January 9, 2020 - 8:48:23 AM
Contributor : Eric Larose Connect in order to contact the contributor
Submitted on : Tuesday, August 6, 2019 - 9:10:18 PM
Last modification on : Wednesday, November 3, 2021 - 5:13:15 AM
Long-term archiving on: : Thursday, January 9, 2020 - 8:48:23 AM
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obermann2019.pdf
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