2024-03-29T00:01:42Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/381332022-11-17T02:08:08Zhdl_2115_20039hdl_2115_116Locations and types of ruptures involved in the 2008 Sichuan earthquake inferred from SAR image matchingKobayashi, TomokazuTakada, YouichiroFuruya, MasatoMurakami, Makoto2008 Sichuan Earthquakeground displacementSAR offset-tracking453We have detected detailed ground displacements in the proximity of the Longmen Shan fault zone (LMSFZ) by applying a SAR offset-tracking method in the analysis of the 2008 Sichuan earthquake. An elevation-dependent correction is indispensable for achieving sub-meter accuracy. A sharp displacement discontinuity with a relative motion of ~1-2 m appears over a length of 200 km along the LMSFZ, which demonstrates that the main rupture has proceeded on the Beichuan fault (BF) among several active faults composing the LMSFZ, and a new active fault is detected on the northeastward extension of the BF. The rupture on the BF is characterized by a right-lateral motion in the northeast, while in the southwest an oblique right-lateral thrust slip is suggested. In contrast to the northeast, where a major rupture proceeded on the BF only, in the southwest multiple thrust ruptures have occurred in the southeastern foot of the Pengguan massif.American Geophysical UnionJournal Articleapplication/pdfhttp://hdl.handle.net/2115/38133https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/38133/1/Kobayashi_GRL2009.pdf0094-8276AA00657102Geophysical Research Letters367L073022009-04enginfo:doi/10.1029/2008GL036907An edited version of this paper was published by AGU. Copyright 2009 American Geophysical Union.author