NDLI: Precision evaluation and characteristics analysis of the coseismic deformation field of the $12^{th}$ may 2008 Wenchuan Ms8.0 earthquake

Content Provider	IEEE Xplore Digital Library
Author	Hong Shun-ying Liu Mei Liu Zhi-rong Dai Ya-qiong Shan Xin-jian Shen Xu-hui Jing Feng
Copyright Year	2009
Description	Author affiliation: Institute of Disaster Prevention Science And Technology, Beijing 101601, China (Liu Zhi-rong) \|\| Department of Mechanical & Materials Engineering, the University of Western Ontario, London, N6A 5B8, Canada (Liu Mei) \|\| Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China (Dai Ya-qiong; Shen Xu-hui; Jing Feng) \|\| Institute of Geology, China Earthquake Administration, Beijing 100029, China (Hong Shun-ying; Shan Xin-jian)
Abstract	Based on the improved DInSAR technology, this paper obtained the whole coseismic deformation field of Wenchuan Ms8.0 earthquake by 128 frames of Lever1.0 data of ALOS PALSAR. By comparing with the continuous GPS survey results, the precision of coseismic deformation field was estimated as about 9.5cm, better than half-wavelength of L-band. The whole coseismic deformation stripe has a total length of about 300km, which encircles the NE-trend seismic ruptures, and is mostly distributed within 19–100km from the fault rupture. The spatial distribution of coseismic deformation gradually narrows down from southwest to northeast, owing to the fact that the seismic energy gradually decayed along the NE-trend from Yingxiu where the seismic fracture begins to Qingchuan where it ends. There is a weak coherence zone near the seismic rupture relating to strong displacements, such as landslide, mud and rock flow, etc. And this weak coherence zone obviously extends wider in south Beichuan than in north Beichuan, which is corresponding to the fact that two parallel rupture faults exist in south Beichuan while only one exists in north Beichuan. The 471-track deformation is produced mainly by Qingchuan Ms6.4 dextral-strike aftershock and other strong aftershocks, and therefore its deformation field is discontinuous with adjacent tracks. As a whole, northwest plate-Bayankala Block was uplifted, while southeast plate-rigid Sichuan Basin subsided, and both sides of the seismic rupture were uplifted. But there exist one subsided zone 10–30km away from the rupture in the Bayankala Block. Synthetically analysis shows that, under the effect of the huge eastward pushing force from Tibet, the Bayankala Block was resisted by the rigid Sichuan Basin when it thrust along the high-angle seismic rupture, and then its east margin bent to form a subsided zone to absorb and release the strong eastward thrusting force.
Starting Page	148
Ending Page	154
File Size	2104158
Page Count	7
File Format	PDF
ISBN	9781424427314
DOI	10.1109/APSAR.2009.5374133
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-26
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Geology Earthquake engineering Capacitive sensors coseismic deformation field Stress precision evaluation Global Positioning System Earth Materials science and technology Wenchuan Ms8.0 earthquake Belts DInSAR ALOS PALSAR Synthetic aperture radar Interferometry
Content Type	Text
Resource Type	Article

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