• HOME>
  • What's New>
  • 2009>
  • Coseismic surface-ruptures and crustal deformations of the 2008 Wenchuan earthquake Mw 7.9, China

印刷

Coseismic surface-ruptures and crustal deformations of the 2008 Wenchuan earthquake Mw 7.9, China

The National Research Institute for Earth Science and Disaster Prevention(NIED) has conducted several field investigations around the faults that caused the 2008 WenchuanEarthquake by collaborating with Kozo Keikaku Engineering Inc.
Over 10-segments locations were measured with distinguished displacement offsets. Of them the maximum vertical displacement reached 6 m on Yinxue-Beichuan fault, and 2 m on Guanxian-Anxian fault. The field results showed coseismic ruptures in detail but our field knowledge is limited in the huge high-topographic area. With the advantages of PALSAR (Synthetic aperture radar sensor) data obtained from satellite ALOS, we could understand the whole fault-zones movements and crustal deformation in macro-scale. Combined the field information with interferometric information from the eight pairs of paths of InSAR interferogram, we derived the parallel fault-slip model. Furthermore, the fault-slip distribution was inversed based on the elastic half-space dislocation theory. The inversed fringes of the InSAR interferogram and the fault-slip displacements were consistent with the observed in general. The results suggested that 290km of the Yingxue-Beichuan fault slipped combined with 70km of another separated Guanxian-Anxian faults, as well as widely crustal deformations.
This research result has been published online on the “Geophysical Research Letters” of the America Geophysical Union (AGU) website.

For further details

please refer to the URL below.

※An edited version of this paper was published by AGU. Copyright(2009) American Geophysical Union.

Return to PAGETOP