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Article

Rheology of the Zagros Lithosphere from Post-Seismic Deformation of the 2017 Mw7.3 Kermanshah, Iraq, Earthquake

by 1,2, 3, 1,2,4,*, 1,2, 4 and 1,2,4
1
Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
Rosenstiel School of Marine and Atmospheric Sciences, University of Miami, Miami, FL 33149, USA
4
Laboratory of Target Microwave Properties (LAMP), Zhongke Academy of Satellite Application in Deqing (DASA), Deqing 313200, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(12), 2032; https://doi.org/10.3390/rs12122032
Received: 26 May 2020 / Revised: 23 June 2020 / Accepted: 23 June 2020 / Published: 24 June 2020
(This article belongs to the Special Issue Remote Sensing in Applied Geophysics)
We use 2018–2020 Sentinel-1 InSAR time series data to study post-seismic deformation processes following the 2017 Mw 7.3 Kermanshah, Iraq earthquake. We remove displacements caused by two large aftershock sequences from the displacement field. We find that for a six month period the response is dominated by afterslip along the up-dip extension of the coseismic rupture zone, producing up to 6 cm of radar line-of-sight displacements. The moment magnitude of afterslip is Mw 5.9 or 12% of the mainshock moment. After that period, the displacement field is best explained by viscoelastic relaxation and a lower crustal viscosity of η l c = 1 0.4 + 0.8 × 10 19   Pas . The viscosity of the uppermost mantle is not constrained by the data, except that it is larger than 0.6 × 10 19   Pas . The relatively high lower crustal and uppermost mantle viscosities are consistent with a cold and dry lithosphere of the Zagros region. View Full-Text
Keywords: post-seismic deformation mechanism; InSAR time series algorithm; Kermanshah earthquake; viscoelastic relaxation post-seismic deformation mechanism; InSAR time series algorithm; Kermanshah earthquake; viscoelastic relaxation
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MDPI and ACS Style

Lv, X.; Amelung, F.; Shao, Y.; Ye, S.; Liu, M.; Xie, C. Rheology of the Zagros Lithosphere from Post-Seismic Deformation of the 2017 Mw7.3 Kermanshah, Iraq, Earthquake. Remote Sens. 2020, 12, 2032. https://doi.org/10.3390/rs12122032

AMA Style

Lv X, Amelung F, Shao Y, Ye S, Liu M, Xie C. Rheology of the Zagros Lithosphere from Post-Seismic Deformation of the 2017 Mw7.3 Kermanshah, Iraq, Earthquake. Remote Sensing. 2020; 12(12):2032. https://doi.org/10.3390/rs12122032

Chicago/Turabian Style

Lv, Xiaoran; Amelung, Falk; Shao, Yun; Ye, Shu; Liu, Ming; Xie, Chou. 2020. "Rheology of the Zagros Lithosphere from Post-Seismic Deformation of the 2017 Mw7.3 Kermanshah, Iraq, Earthquake" Remote Sens. 12, no. 12: 2032. https://doi.org/10.3390/rs12122032

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