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Title

联合InSAR和高频GNSS位移波形反演2022年青海门源M6.9地震同震破裂过程

Alternative Title
Joint inversion of InSAR and high-rate GNSS displacement waveforms for the rupture process of the 2022 Qinghai Menyuan M6. 9 earthquake
Author
Corresponding AuthorChen KeJie
Publication Years
2022-12-01
DOI
Source Title
ISSN
0001-5733
Volume65Issue:12
Abstract

Using differential interferometric synthetic aperture radar (InSAR) and pixel offset tracking, we obtained both the coseismic displacements along line-of-sight and near-field range offsets of the 2022 Qinghai Menyuan M6. 9 earthquake from Sentinel-1 SAR images, and also got high-rate displacement waveforms at 16 Global Navigation Satellite System stations through epochwise precise point positioning solutions. Based on these measurements, we then jointly inverted the rupture process of the 2022 Menyuan M6. 9 earthquake. Our results show that this earthquake was a bilateral asymmetric event, which ruptured two faults at strikes of 82 degrees and 112 degrees with a total length of similar to 26 km. Most of the slip occurred between 0 and 5 km, and the peak slip was similar to 4 m. A total seismic moment of 8. 65 x10(18) Nm (equivalent to M(w)6. 56) was released within similar to 10 s. Coulomb failure stress change analysis indicates that stress levels of two neighbouring seismogenic faults at 10 km were increased, which was responsible for the subsequent aftershocks in this region. Our slip model implies insignificant shallow slip deficits, considering InSAR time series from 2014 to 2021, so we speculated that there should be negligible shallow creeping along Lenglongling and Tuolaishan segments during the long-term interseismic period.

Keywords
URL[Source Record]
Indexed By
Language
Chinese
SUSTech Authorship
First ; Corresponding
WOS Research Area
Geochemistry & Geophysics
WOS Subject
Geochemistry & Geophysics
WOS Accession No
WOS:000893187400015
Publisher
ESI Research Field
GEOSCIENCES
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:2
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/417341
DepartmentDepartment of Earth and Space Sciences
Affiliation
1.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen 518055, Peoples R China
2.Wuhan Univ, GNSS Res Ctr, Wuhan 430079, Peoples R China
3.Qinghai Normal Univ, Sch Geog Sci, Xining 810016, Peoples R China
4.Qinghai Basic Surveying & Mapping Inst, Xining 810101, Peoples R China
5.China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China
First Author AffilicationDepartment of Earth and Space Sciences
Corresponding Author AffilicationDepartment of Earth and Space Sciences
First Author's First AffilicationDepartment of Earth and Space Sciences
Recommended Citation
GB/T 7714
Lu MingZhe,Chen KeJie,Chai HaiShan,等. 联合InSAR和高频GNSS位移波形反演2022年青海门源M6.9地震同震破裂过程[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2022,65(12).
APA
Lu MingZhe,Chen KeJie,Chai HaiShan,Geng JiangHui,Zhang ShengPeng,&Fang LiHua.(2022).联合InSAR和高频GNSS位移波形反演2022年青海门源M6.9地震同震破裂过程.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,65(12).
MLA
Lu MingZhe,et al."联合InSAR和高频GNSS位移波形反演2022年青海门源M6.9地震同震破裂过程".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 65.12(2022).
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