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GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,
VOL. 9,
Q04026,
11 PP., 2008
doi:10.1029/2007GC001910 [Citation]
The 1998 Mw 5.7 Zhangbei-Shangyi (China) earthquake revisited: A buried thrust fault revealed with interferometric synthetic aperture radar
COMET, Department of Civil, Environmental and Geomatic Engineering, University College London, Gower Street, London WC1E 6BT, UK
Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
Institute of Geophysics, China Earthquake Administration, Beijing 100081, China
COMET, Department of Civil, Environmental and Geomatic Engineering, University College London, Gower Street, London WC1E 6BT, UK
Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China
The 1998 M w 5.7 Zhangbei-Shangyi (China) earthquake is the largest to have occurred in northern China since the large 1976 M s 7.8 Tangshan earthquake. Due to its proximity to Beijing, the capital of China, it has therefore gained a lot of attention. A great number of studies have been conducted using seismic and geodetic data, but few are able to identify conclusively the orientation of the primary fault plane for this earthquake. In this paper, two independent ERS synthetic aperture radar interferograms are used to determine precisely the location and magnitude of coseismic surface displacements (∼11 cm in the radar line of sight). Modeling the event as dislocation in an elastic half-space suggests that the earthquake is associated with a buried shallow NNE-SSW oriented thrust fault with a limited amount of lateral displacement, which is consistent with seismic intensity distribution and aftershock locations.
Received 23 November 2007; accepted 29 February 2008; published 17 April 2008.
Citation: (2008), The 1998 Mw 5.7 Zhangbei-Shangyi (China) earthquake revisited: A buried thrust fault revealed with interferometric synthetic aperture radar, Geochem. Geophys. Geosyst., 9, Q04026, doi:10.1029/2007GC001910.
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