Preliminary analysis on characteristics of coseismic deformation associated with M S=8.1 western Kunlunshan Pass earthquake in 2001 |
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| Authors: | Shan Xin-jian Liu Jia-hang and Ma Chao |
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| Institution: | (1) State Key Laboratory of Earthquake Dynamics, China Earthquake Administration, 100029 Beijing, China;(2) Taiyuan University of Technology, 030024 Taiyuan, China |
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| Abstract: | Based on the analysis of coseismic deformation in the macroscopic epicentral region extracted by Differential Interferometric
Synthetic Aperture Radar (D-InSAR), and combined with the seismic activity, focal mechanism solutions of the earthquake and
field investigation, the characteristic of coseismic deformation of M
S=8.1 western Kunlunshan Pass earthquake in 2001 was researched. The study shows that its epicenter lies in the northeast side
of Hoh Sai Hu; and the seismogenic fault in the macroscopic epicentral region can be divided into two central deformation
fields: the west and east segments with the lengths of 42 km and 48 km, respectively. The whole fault extends about 90 km.
From the distribution of interferometry fringes, the characteristic of sinistral strike slip of seismogenic fault can be identified
clearly. The deformations on both sides of the fault are different with an obviously higher value on the south side. In the
vicinity of macroscopic epicenter, the maximum displacement in look direction is about 288.4 cm and the minimum is 224.0 cm;
the maximum sinistral horizontal dislocation of seismogenic fault near the macroscopic epicenter is 738.1 cm and the minimum
is 551.8 cm.
Foundation item: National Natural Science Foundation of China (40374013) and “Researching on the Disaster Earthquake” (2003) of Public Welfare
Research Item, Ministry of Science and Technology of China. |
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| Keywords: | InSAR M S=8 1 western Kunlunshan Pass earthquake coseismic deformation |
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