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Source parameters of the 2008 Gaize Mw 6.4 and Mw 5.9 earthquakes from InSAR measurements

Feng, W., Xu, L., Xu, Z., Li, Z., Li, C., and Zhao, H. (2009) Source parameters of the 2008 Gaize Mw 6.4 and Mw 5.9 earthquakes from InSAR measurements. Chinese Journal of Geophysics (Chinese Edition), 52 (4). pp. 983-993. ISSN 0001-5733

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Publisher's URL: http://www.geophy.cn/CN/abstract/abstract1000.shtml

Abstract

On 9 January 2008, an MW6.4 earthquake struck Gêrzê, Tibet of China, followed by 40 aftershocks with magnitudes equal to or greater than 3.5, including the biggest one with MW5.9 on 16 January 2008. Two tracks (1 ascending and 1 descending) of ENVISAT ASAR data were processed to precisely determine the locations and amplitudes of coseismic surface displacements firstly. Then the coseismic displacements were inverted to build uniform dislocation models and further distributed-slip models in an elastic half-space. The inverted results suggest that the MW6.4 main shock is associated with a west-dipping fault plane with a strike of 218° and a dip of 52°, while the MW5.9 aftershock is related with a west-dipping fault plane, 3.2 km west to the main fault, with a strike of 200° and a dip of 59°; and the peak slip of 1.9 m is located at a depth of 7.6 km in the main fault, whilst the maximum slip of 1.0 m is observed at a depth of 3.9 km in the aftershock fault plane.

Item Type:Article
Keywords:Gêrzê earthquakes; Fault parameters; InSAR; geodetic inversion
Status:Published
Refereed:Yes
Glasgow Author(s):Li, Dr Zhenhong
Authors: Feng, W., Xu, L., Xu, Z., Li, Z., Li, C., and Zhao, H.
Subjects:Q Science > QE Geology
G Geography. Anthropology. Recreation > GB Physical geography
T Technology > TA Engineering (General). Civil engineering (General)
College/School:College of Science and Engineering > School of Geographical and Earth Sciences
Journal Name:Chinese Journal of Geophysics (Chinese Edition)
Journal Abbr.:Chinese Journal of Geophysics
Publisher:Kexue Chubanshe
ISSN:0001-5733
Published Online:2009

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
513031GAS: Generic Atmosphere Solutions for radar measurementsZhenhong LiNatural Environment Research Council (NERC)NE/H001085/1School of Geographical and Earth Sciences