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Title: Geodetic Constraints of the 2017 M w 7.3 Sarpol Zahab, Iran Earthquake, and Its Implications on the Structure and Mechanics of the Northwest Zagros Thrust-Fold Belt
Authors: Feng, Wanpeng
Samsonov, Sergey
Almeida, Rafael
Yassaghi, Ali
Li, Junhua
Qiu, Qiang
Li, Peng
Zheng, Wenjun
Keywords: DRNTU::Science::Geology
Sarpol Zahab Earthquake
Issue Date: 2018
Source: Feng, W., Samsonov, S., Almeida, R., Yassaghi, A., Li, J., Qiu, Q., . . . Zheng, W. (2018). Geodetic Constraints of the 2017 Mw 7.3 Sarpol Zahab, Iran Earthquake, and Its Implications on the Structure and Mechanics of the Northwest Zagros Thrust-Fold Belt. Geophysical Research Letters, 45(14), 6853-6861. doi:10.1029/2018GL078577
Series/Report no.: Geophysical Research Letters
Abstract: We reveal transient surface deformation following the 2017 Mw7.3 Sarpol Zahab (Iran) earthquake using Interferometric Synthetic Aperture Radar (InSAR) measurements. Based on the coseismic interferograms derived from the Advanced Land Observing Satellite‐2 (ALOS‐2) data, the preferred slip model of the earthquake has a centroid depth of 14.5 ± 4 km and suggests that a basement fault is most likely responsible for the 2017 earthquake in the northwest Zagros fold‐thrust belt zone. Two slip asperities with a maximum slip of 6 m separated by 16 km are observed in the best fitting slip model. The accumulated afterslip in the first month after the mainshock determined from the Sentinel‐1 postseismic interferograms reveals a slip distribution that lies immediately updip of the coseismic slip, implying that frictional properties of the fault vary along the rupture patch. The Bamo Mount in the earthquake area was uplifted by approximately 1 m during the earthquake. We suggest that local topographic growth from both seismic and aseismic faulting behaviors is common within the Zagros fold‐thrust belt zone based on our findings regarding the 2017 earthquake and other significant events in the region.
ISSN: 0094-8276
DOI: 10.1029/2018GL078577
Rights: © 2018 American Geophysical Union. This paper was published in Geophysical Research Letters and is made available as an electronic reprint (preprint) with permission of American Geophysical Union. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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