气候变化领域集成服务门户(CCPortal): Studying postseismic deformation of the 2010–2011 Rigan earthquake sequence in SE Iran using geodetic data

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DOI	10.1016/j.tecto.2020.228630
	Studying postseismic deformation of the 2010–2011 Rigan earthquake sequence in SE Iran using geodetic data
	Amiri M.; Mousavi Z.; Atzori S.; Khorrami F.; Aflaki M.; Tolomei C.; Motaghi K.; Salvi S.
发表日期	2020
ISSN	00401951
卷号	795
英文摘要	In this paper, we study the spatial distribution and temporal evolution of the postseismic deformation of the 2010–2011 Rigan earthquake sequence which occurred at the southern termination of the East Lut fault system, southeast Iran. One-year GPS measurements after the Rigan earthquake sequence reveals right-lateral postseismic displacement along the East Chahqanbar fault and left-lateral postseismic displacement along the South Chahqanbar fault. To investigate the deformation variations in time and space, InSAR time-series of COSMO-SkyMed images is applied using the Small Baseline Subset algorithm. The results confirm a clear cumulative postseismic signal increasing to 8 mm during the first five months following the first mainshock in the direction of the coseismic displacement. The cumulative postseismic displacements are well correlated with the cumulative number of the aftershocks and their associated moment release. Considering this correlation and the observation of a sharp discontinuity along the coseismic fault in the displacement map, it is concluded that the after-slip mechanism is responsible for the observed postseismic deformation in the study region. This study is the first observation of a short-term postseismic motion in eastern Iran through geodetic data in contrast with long-lasting postseismic displacements following the earthquakes that occurred around Lut block. Modeling of the postseismic displacement results in a distributed slip pattern with a maximum slip of 0.8 m on the fault plane responsible for the 2010 Rigan coseismic deformation. This indicates that the postseismic deformation on barriers remained unbroken during the mainshock. © 2020 Elsevier B.V.
关键词	InSAR Lut block Postseismic deformation Rigan earthquake Southeastern Iran
英文关键词	Deformation; Earthquake effects; Geodesy; Co-seismic displacement; Coseismic deformation; Cumulative number; Displacement maps; Earthquake sequences; Postseismic deformation; Small baseline subsets; Temporal evolution; Faulting; deformation; earthquake event; fault zone; geodetic network; ground motion; seismicity; spatiotemporal analysis; synthetic aperture radar; time series analysis; Iran; Kerman [Iran]; Rigan
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207704
作者单位	Department of Earth Sciences, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, 45137-66137, Iran; Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy; National Cartographic Center, Tehran, 1387835861, Iran
推荐引用方式 GB/T 7714	Amiri M.,Mousavi Z.,Atzori S.,等. Studying postseismic deformation of the 2010–2011 Rigan earthquake sequence in SE Iran using geodetic data[J],2020,795.
APA	Amiri M..,Mousavi Z..,Atzori S..,Khorrami F..,Aflaki M..,...&Salvi S..(2020).Studying postseismic deformation of the 2010–2011 Rigan earthquake sequence in SE Iran using geodetic data.Tectonophysics,795.
MLA	Amiri M.,et al."Studying postseismic deformation of the 2010–2011 Rigan earthquake sequence in SE Iran using geodetic data".Tectonophysics 795(2020).