Co-Seismic Inversion and Post-Seismic Deformation Mechanism Analysis of 2019 California Earthquake
In July 2019, a series of seismic events, including a magnitude (Mw) 7.1 mainshock and Mw 6.4 foreshock, occurred in Eastern California. Studying these seismic events can significantly improve our understanding of the Eastern California tectonic environment. Sentinel-1A and ALOS-2 PALSAR images were...
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| Format: | Article |
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MDPI AG
2021-02-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/13/4/608 |
| _version_ | 1797412601597001728 |
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| author | Chengsheng Yang Ting Wang Sainan Zhu Bingquan Han Jihong Dong Chaoying Zhao |
| author_facet | Chengsheng Yang Ting Wang Sainan Zhu Bingquan Han Jihong Dong Chaoying Zhao |
| author_sort | Chengsheng Yang |
| collection | DOAJ |
| description | In July 2019, a series of seismic events, including a magnitude (Mw) 7.1 mainshock and Mw 6.4 foreshock, occurred in Eastern California. Studying these seismic events can significantly improve our understanding of the Eastern California tectonic environment. Sentinel-1A and ALOS-2 PALSAR images were utilized to obtain co-seismic deformation fields, including mainshock and foreshock deformation. The Okada elastic dislocation model and ascending and descending orbit results were used to invert the co-seismic slip distribution and obtain a co-seismic focal mechanism solution. Using ascending Sentinel-1A images, a time-series deformation was obtained for 402 d after the earthquake, and the deformation evolution mechanism was analyzed. The maximum uplift caused by the co-seismic mechanism reached 1.5 m in the line of sight (LOS), and the maximum subsidence reached 1 m in the LOS. For 402 d after the earthquake, the area remained active, and its deformation was dominated by after-slip. The co-seismic inversion results illustrated that California earthquakes were mainly strike-slip. The co-seismic inversion magnitude was approximately Mw 7.08. The Coulomb stress change illustrated that the seismic moment caused by the co-seismic slip was 4.24 × 10<sup>26</sup> N × m, which is approximately Mw 7.06. This finding is consistent with the co-seismic slip distribution inversion results. |
| first_indexed | 2024-03-09T05:04:31Z |
| format | Article |
| id | doaj.art-e2dc607a31174b2aa6dbc14b0d7b0661 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T05:04:31Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
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| series | Remote Sensing |
| spelling | doaj.art-e2dc607a31174b2aa6dbc14b0d7b06612023-12-03T12:56:19ZengMDPI AGRemote Sensing2072-42922021-02-0113460810.3390/rs13040608Co-Seismic Inversion and Post-Seismic Deformation Mechanism Analysis of 2019 California EarthquakeChengsheng Yang0Ting Wang1Sainan Zhu2Bingquan Han3Jihong Dong4Chaoying Zhao5College of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaCollege of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaChina Institute of Geo-Environment Monitoring, Beijing 100081, ChinaCollege of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaCollege of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaCollege of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaIn July 2019, a series of seismic events, including a magnitude (Mw) 7.1 mainshock and Mw 6.4 foreshock, occurred in Eastern California. Studying these seismic events can significantly improve our understanding of the Eastern California tectonic environment. Sentinel-1A and ALOS-2 PALSAR images were utilized to obtain co-seismic deformation fields, including mainshock and foreshock deformation. The Okada elastic dislocation model and ascending and descending orbit results were used to invert the co-seismic slip distribution and obtain a co-seismic focal mechanism solution. Using ascending Sentinel-1A images, a time-series deformation was obtained for 402 d after the earthquake, and the deformation evolution mechanism was analyzed. The maximum uplift caused by the co-seismic mechanism reached 1.5 m in the line of sight (LOS), and the maximum subsidence reached 1 m in the LOS. For 402 d after the earthquake, the area remained active, and its deformation was dominated by after-slip. The co-seismic inversion results illustrated that California earthquakes were mainly strike-slip. The co-seismic inversion magnitude was approximately Mw 7.08. The Coulomb stress change illustrated that the seismic moment caused by the co-seismic slip was 4.24 × 10<sup>26</sup> N × m, which is approximately Mw 7.06. This finding is consistent with the co-seismic slip distribution inversion results.https://www.mdpi.com/2072-4292/13/4/608California earthquakeco-seismic deformationpost-seismic deformationslip distributionCoulomb stress |
| spellingShingle | Chengsheng Yang Ting Wang Sainan Zhu Bingquan Han Jihong Dong Chaoying Zhao Co-Seismic Inversion and Post-Seismic Deformation Mechanism Analysis of 2019 California Earthquake Remote Sensing California earthquake co-seismic deformation post-seismic deformation slip distribution Coulomb stress |
| title | Co-Seismic Inversion and Post-Seismic Deformation Mechanism Analysis of 2019 California Earthquake |
| title_full | Co-Seismic Inversion and Post-Seismic Deformation Mechanism Analysis of 2019 California Earthquake |
| title_fullStr | Co-Seismic Inversion and Post-Seismic Deformation Mechanism Analysis of 2019 California Earthquake |
| title_full_unstemmed | Co-Seismic Inversion and Post-Seismic Deformation Mechanism Analysis of 2019 California Earthquake |
| title_short | Co-Seismic Inversion and Post-Seismic Deformation Mechanism Analysis of 2019 California Earthquake |
| title_sort | co seismic inversion and post seismic deformation mechanism analysis of 2019 california earthquake |
| topic | California earthquake co-seismic deformation post-seismic deformation slip distribution Coulomb stress |
| url | https://www.mdpi.com/2072-4292/13/4/608 |
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