Coseismic slip in the 2010 Yushu earthquake (China), constrained by wide-swath and strip-map InSAR
On 14 April 2010, an <i>M</i><sub>w</sub> = 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 fa...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2013-01-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | http://www.nat-hazards-earth-syst-sci.net/13/35/2013/nhess-13-35-2013.pdf |
| _version_ | 1819172285113696256 |
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| author | Y. Wen C. Xu Y. Liu G. Jiang P. He |
| author_facet | Y. Wen C. Xu Y. Liu G. Jiang P. He |
| author_sort | Y. Wen |
| collection | DOAJ |
| description | On 14 April 2010, an <i>M</i><sub>w</sub> = 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 <i>M</i><sub>w</sub> = 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. |
| first_indexed | 2024-12-22T20:04:45Z |
| format | Article |
| id | doaj.art-90a78b39973346cbbd0101139f4f5fa4 |
| institution | Directory Open Access Journal |
| issn | 1561-8633 1684-9981 |
| language | English |
| last_indexed | 2024-12-22T20:04:45Z |
| publishDate | 2013-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Natural Hazards and Earth System Sciences |
| spelling | doaj.art-90a78b39973346cbbd0101139f4f5fa42022-12-21T18:14:09ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812013-01-01131354410.5194/nhess-13-35-2013Coseismic slip in the 2010 Yushu earthquake (China), constrained by wide-swath and strip-map InSARY. WenC. XuY. LiuG. JiangP. HeOn 14 April 2010, an <i>M</i><sub>w</sub> = 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 <i>M</i><sub>w</sub> = 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.http://www.nat-hazards-earth-syst-sci.net/13/35/2013/nhess-13-35-2013.pdf |
| spellingShingle | Y. Wen C. Xu Y. Liu G. Jiang P. He Coseismic slip in the 2010 Yushu earthquake (China), constrained by wide-swath and strip-map InSAR Natural Hazards and Earth System Sciences |
| title | Coseismic slip in the 2010 Yushu earthquake (China), constrained by wide-swath and strip-map InSAR |
| title_full | Coseismic slip in the 2010 Yushu earthquake (China), constrained by wide-swath and strip-map InSAR |
| title_fullStr | Coseismic slip in the 2010 Yushu earthquake (China), constrained by wide-swath and strip-map InSAR |
| title_full_unstemmed | Coseismic slip in the 2010 Yushu earthquake (China), constrained by wide-swath and strip-map InSAR |
| title_short | Coseismic slip in the 2010 Yushu earthquake (China), constrained by wide-swath and strip-map InSAR |
| title_sort | coseismic slip in the 2010 yushu earthquake china constrained by wide swath and strip map insar |
| url | http://www.nat-hazards-earth-syst-sci.net/13/35/2013/nhess-13-35-2013.pdf |
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