干旱区生态环境知识资源中心(Arid): Co- and Early Postseismic Deformation Due to the 2019 Ridgecrest Earthquake Sequence Constrained by Sentinel-1 and COSMO-SkyMed SAR Data

Arid

DOI	10.1785/0220190299
	Co- and Early Postseismic Deformation Due to the 2019 Ridgecrest Earthquake Sequence Constrained by Sentinel-1 and COSMO-SkyMed SAR Data
	Wang, Kang; Burgmann, Roland
通讯作者	Wang, K
来源期刊	SEISMOLOGICAL RESEARCH LETTERS
ISSN	0895-0695
EISSN	1938-2057
出版年	2020
卷号	91 期号:4 页码:1998-2009
英文摘要	The 2019 Ridgecrest earthquake sequence ruptured a series of conjugate faults in the broad eastern California shear zone, north of the Mojave Desert in southern California. The average spacing between Global Navigation Satellite System (GNSS) stations around the earthquakes is 20-30 km, insufficient to constrain the rupture details of the earthquakes. Here, we use Sentinel-1 and COSMO-SkyMed (CSK) Synthetic Aperture Radar data to derive the high-resolution coseismic and early postseismic surface deformation related to the Ridgecrest earthquake sequence. Line of sight (LoS) Interferometric Synthetic Aperture Radar displacements derived from both Sentinel-1 and CSK data are in good agreement with GNSS measurements. The maximum coseismic displacement occurs near the M-w 7.1 epicenter, with an estimated fault offset of similar to 4:5 m on a north-west-striking rupture. Pixel tracking analysis of CSK data also reveals a sharp surface offset of similar to 1 m on a second northwest-striking fault strand on which the M-w 6.4 foreshock likely nucleated, which is located similar to 2-3 km east of the major rupture. The lack of clear surface displacement across this fault segment during the M-w 6.4 event suggests this fault might have ruptured twice, with more pronounced and shallow slip during the M-w 7.1 mainshock. Both Sentinel-1 and CSK data reveal clear postseismic deformation following the 2019 Ridgecrest earthquake sequence. Cumulative postseismic deformation near the M-w 7.1 epicenter similar to 2 months after the mainshock reaches similar to 5 cm along the satellites' LoSs. The observed postseismic deformation near the fault is indicative of both afterslip and poroelastic rebound. We provide data derived in this study in various data formats, which will be useful for the broad community studying this earthquake sequence.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000546990900002
WOS关键词	HECTOR MINE ; CALIFORNIA ; RADAR ; SLIP ; MODELS
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
来源机构	University of California, Berkeley
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324990
作者单位	[Wang, Kang; Burgmann, Roland] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA
推荐引用方式 GB/T 7714	Wang, Kang,Burgmann, Roland. Co- and Early Postseismic Deformation Due to the 2019 Ridgecrest Earthquake Sequence Constrained by Sentinel-1 and COSMO-SkyMed SAR Data[J]. University of California, Berkeley,2020,91(4):1998-2009.
APA	Wang, Kang,&Burgmann, Roland.(2020).Co- and Early Postseismic Deformation Due to the 2019 Ridgecrest Earthquake Sequence Constrained by Sentinel-1 and COSMO-SkyMed SAR Data.SEISMOLOGICAL RESEARCH LETTERS,91(4),1998-2009.
MLA	Wang, Kang,et al."Co- and Early Postseismic Deformation Due to the 2019 Ridgecrest Earthquake Sequence Constrained by Sentinel-1 and COSMO-SkyMed SAR Data".SEISMOLOGICAL RESEARCH LETTERS 91.4(2020):1998-2009.