Constraining depth range of S wave velocity decrease after large earthquakes near Parkfield, California
Abstract We use noise correlation and surface wave inversion to measure the S wave velocity changes at different depths near Parkfield, California, after the 2003 San Simeon and 2004 Parkfield earthquakes. We process continuous seismic recordings from 13 stations to obtain the noise cross‐correlatio...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL069145 |
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| _version_ | 1849321810220285952 |
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| author | Chunquan Wu Andrew Delorey Florent Brenguier Celine Hadziioannou Eric G Daub Paul Johnson |
| author_facet | Chunquan Wu Andrew Delorey Florent Brenguier Celine Hadziioannou Eric G Daub Paul Johnson |
| author_sort | Chunquan Wu |
| collection | DOAJ |
| description | Abstract We use noise correlation and surface wave inversion to measure the S wave velocity changes at different depths near Parkfield, California, after the 2003 San Simeon and 2004 Parkfield earthquakes. We process continuous seismic recordings from 13 stations to obtain the noise cross‐correlation functions and measure the Rayleigh wave phase velocity changes over six frequency bands. We then invert the Rayleigh wave phase velocity changes using a series of sensitivity kernels to obtain the S wave velocity changes at different depths. Our results indicate that the S wave velocity decreases caused by the San Simeon earthquake are relatively small (~0.02%) and access depths of at least 2.3 km. The S wave velocity decreases caused by the Parkfield earthquake are larger (~0.2%), and access depths of at least 1.2 km. Our observations can be best explained by material damage and healing resulting mainly from the dynamic stress perturbations of the two large earthquakes. |
| format | Article |
| id | doaj-art-e7c482b7c24a4c9b8354761c661a2f3a |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-e7c482b7c24a4c9b8354761c661a2f3a2025-08-20T03:49:37ZengWileyGeophysical Research Letters0094-82761944-80072016-06-0143126129613610.1002/2016GL069145Constraining depth range of S wave velocity decrease after large earthquakes near Parkfield, CaliforniaChunquan Wu0Andrew Delorey1Florent Brenguier2Celine Hadziioannou3Eric G Daub4Paul Johnson5Center of Earthquake Research and Information University of Memphis Memphis Tennessee USAGeophysics Group Los Alamos National Laboratory Los Alamos New Mexico USAInstitut des Sciences de la Terre Grenoble FranceDepartment of Earth and Environmental Sciences Ludwig Maximilians University Munich GermanyCenter of Earthquake Research and Information University of Memphis Memphis Tennessee USAGeophysics Group Los Alamos National Laboratory Los Alamos New Mexico USAAbstract We use noise correlation and surface wave inversion to measure the S wave velocity changes at different depths near Parkfield, California, after the 2003 San Simeon and 2004 Parkfield earthquakes. We process continuous seismic recordings from 13 stations to obtain the noise cross‐correlation functions and measure the Rayleigh wave phase velocity changes over six frequency bands. We then invert the Rayleigh wave phase velocity changes using a series of sensitivity kernels to obtain the S wave velocity changes at different depths. Our results indicate that the S wave velocity decreases caused by the San Simeon earthquake are relatively small (~0.02%) and access depths of at least 2.3 km. The S wave velocity decreases caused by the Parkfield earthquake are larger (~0.2%), and access depths of at least 1.2 km. Our observations can be best explained by material damage and healing resulting mainly from the dynamic stress perturbations of the two large earthquakes.https://doi.org/10.1002/2016GL069145temporal changesnoise interferometrycentral California |
| spellingShingle | Chunquan Wu Andrew Delorey Florent Brenguier Celine Hadziioannou Eric G Daub Paul Johnson Constraining depth range of S wave velocity decrease after large earthquakes near Parkfield, California Geophysical Research Letters temporal changes noise interferometry central California |
| title | Constraining depth range of S wave velocity decrease after large earthquakes near Parkfield, California |
| title_full | Constraining depth range of S wave velocity decrease after large earthquakes near Parkfield, California |
| title_fullStr | Constraining depth range of S wave velocity decrease after large earthquakes near Parkfield, California |
| title_full_unstemmed | Constraining depth range of S wave velocity decrease after large earthquakes near Parkfield, California |
| title_short | Constraining depth range of S wave velocity decrease after large earthquakes near Parkfield, California |
| title_sort | constraining depth range of s wave velocity decrease after large earthquakes near parkfield california |
| topic | temporal changes noise interferometry central California |
| url | https://doi.org/10.1002/2016GL069145 |
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