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| Titel |
Coseismic slip in the 2010 Yushu earthquake (China), constrained by wide-swath and strip-map InSAR |
| VerfasserIn |
Y. Wen, C. Xu, Y. Liu, G. Jiang, P. He |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 13, no. 1 ; Nr. 13, no. 1 (2013-01-09), S.35-44 |
| Datensatznummer |
250017528
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| Publikation (Nr.) |
 copernicus.org/nhess-13-35-2013.pdf |
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| Zusammenfassung |
| On 14 April 2010, an Mw = 6.9 earthquake occurred in
the Yushu county of China, which caused ~3000 people to lose
their lives. Integrated with the information from the observed surface
ruptures and aftershock locations, the faulting pattern of this earthquake
is derived from the descending wide-swath and ascending strip mode PALSAR
data collected by ALOS satellite. We used a layered crustal model and stress
drop smoothing constraint to infer the coseismic slip distribution. Our
model suggests that the earthquake fault can be divided into four segments
and the slip mainly occurs within the upper 12 km with a maximum slip of 2.0 m
at depth of 3 km on the Jiegu segment. The rupture of the upper 12 km is
dominated by left-lateral strike-slip motion. The relatively small slip
along the SE region of Yushu segment suggests a slip deficit there. The
inverted geodetic moment is approximately Mw = 6.9, consistent with the
seismological results. The average stress drop caused by the earthquake is
about 2 MPa with a maximum stress drop of 8.3 MPa. Furthermore, the
calculated static Coulomb stress changes in surrounding regions show
increased Coulomb stress occurred in the SE region along the Yushu segment
but with less aftershock, indicating an increased seismic hazard in this region
after the earthquake. |
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