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Source rupture process inversion of the 2013 Lushan earthquake,China 认领 引用 被引量：6
1
作者 Zhang Lifen Iman Fatchurochman +2 位作者 Liao Wulin Li Jinggang Wang Qiuliang 《Geodesy and Geodynamics》 2013年第2期16-21,共6页
The spatial and temporal slip distribution of the Lushan earthquake was estimated using teleseismic body wave data. To perform a stable inversion, we applied smoothing constraints and determined their optimal relative... The spatial and temporal slip distribution of the Lushan earthquake was estimated using teleseismic body wave data. To perform a stable inversion, we applied smoothing constraints and determined their optimal relative weights on the observed data using an optimized Akaike＇ s Bayesian Information Criterion （ABIC）. The inversion generated the source parameters. Strike, dip and slip were 218°, 39° and 100. 8° ,respectively. A seismic moment （M0） was 2. 1 × 10^20 Nm with a moment magnitude （Mw） of 6. 8, and a source duration was approximately 30 second. The rupture propagated along the dip direction, and the maximum slip occurred at the hypocenter. The maximum slip was approximately 2. 1 m, although this earthquake did not cause an apparent surface rupture. The energy was mainly released within 10 second. In addition, the Lushan earthquake was apparently related to the 2008 Wenchuan earthquake. However, the question of whether it was an aftershock of the Wenchuan earthquake requires further study. 展开更多
关键词 source rupture process teleseismic wave Lushan earthquake
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Moment tensor inversion and source rupture process of the September 27, 2003 M_S=7.9 earthquake occurred in the border area of China, Russia and Mongolia 认领 引用
2
作者 赵翠萍 陈章立 +1 位作者 郑斯华 刘杰 《Acta Seismologica Sinica(English Edition)》 2005年第3期255-268,378,共14页
plane with the strike of 127°, the dip of 79° and the rake of 171°. The rupture process inversion result of MS=7.9 earthquake shows that the total rupture duration is about 37 s, the scalar moment tenso... plane with the strike of 127°, the dip of 79° and the rake of 171°. The rupture process inversion result of MS=7.9 earthquake shows that the total rupture duration is about 37 s, the scalar moment tensor is M0=0.97 × 1020 N·m. Rupture mainly occurred on the shallow area with 110 km long and 30 km wide, the location in which the rupture initiated is not where the main rupture took place, and the area with slip greater than 0.5 m basically lies within 35 km deep middle-crust under the earth surface. The maximum static slip is 3.6 m. There are two distinct areas with slip larger than 2.0 m. We noticed that when the rupture propagated towards northwest and closed to the area around the MS=7.3 hypocenter, the slip decreased rapidly, which may indicate that the rupture process was stopped by barriers. The consistence of spatial distribution of slip on the fault plane with the distribution of aftershocks also supports that the rupture is a heterogeneous process owing to the presence of barriers. 展开更多
关键词 earthquake occurred in the boundary area of China Russia and Mongolia moment tensor inversion source rupture process barrier
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Source parameters of the 2023 ML 6.4 Jajarkot earthquake in the western Nepal seismic gap zone 认领 引用 被引量：1
3
作者 Sanjev Dhakal Ling Bai +7 位作者 Bowen Song Guohui Li Md.Moklesur Rahman Hui Su Zhiwen Chen Shaojun Wang Hongru Li Li Li 《Earthquake Science》 CAS CSCD 2026年第3期273-285,共13页
The 2023 local magnitude(ML)6.4 Jajarkot earthquake was the most destructive event to occur in the source region of the 1505 MW8.2 Lo Mangthang Mustang earthquake in western Nepal.Here we used local seismic stat... The 2023 local magnitude(ML)6.4 Jajarkot earthquake was the most destructive event to occur in the source region of the 1505 MW8.2 Lo Mangthang Mustang earthquake in western Nepal.Here we used local seismic stations deployed in Nepal and southern China,and teleseismic stations with depth phase records to study the earthquake relocation and source rupture process.The Jajarkot earthquake was relocated to an epicenter at 28.828°N,82.110°E and a focal depth of 13 km.The fault plane solution showed a thrust fault earthquake with a north-dipping angle of 21°.The released seismic moment was 3.88×1017N·m,corresponding to a moment magnitude(MW)of 5.7.The rupture area was 25 km along the strike and 20 km along the dip.The rupture nucleated on the ramp structure of the main Himalayan thrust and propagated to shallower depths,causing severe damage to the surrounding region.This study provides new insights into the local geometry of the main Himalayan thrust within the seismic gap zone in western Nepal. 展开更多
关键词 2023 Jajarkot earthquake Main Himalayan Thrust seismic observation earthquake relocation source rupture process
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Source process of the 14 November 2001 western Kunlun Mountain M_S=8.1 earth-quake 认领 引用 被引量：1
4
作者 ZHOU Yun-hao CHEN Zhang-li MIAO Fa-jun 《Acta Seismologica Sinica(English Edition)》 2004年第Z1期9-21,共13页
Based on digital teleseismic P-wave seismograms recorded by 28 long-period seismograph stations of the global seismic network, source process of the November 14, 2001 western Kunlun Mountain MS=8.1 (MW=7.8) earth- qua... Based on digital teleseismic P-wave seismograms recorded by 28 long-period seismograph stations of the global seismic network, source process of the November 14, 2001 western Kunlun Mountain MS=8.1 (MW=7.8) earth- quake is estimated by a new inversion method. The result shows that the earthquake is a very complex rupture event. The source rupture initiated at the hypocenter (35.95°N, 90.54°E, focal depth 10 km, by USGS NEIC), and propagated to the west at first. Then, in several minutes to a hundred minutes and over a large spatial range, several rupture growth points emerged in succession at the eastern end and in the central part of the finite fault. And then the source rupture propagated from these rupture growth points successively and, finally, stopped in the area within 50 km to the east of the centroid position (35.80°N, 92.91°E, focal depth 15 km, by Harvard CMT). The entire rupture lasted for 142 s, and the source process could be roughly separated into three stages: The first stage started at the 0 s and ended at the 52 s, lasting for 52 s and releasing approximately 24.4% of the total moment; The sec- ond stage started at the 55 s and ended at the 113 s, lasting for 58 s and releasing approximately 56.5% of the total moment; The third stage started at the 122 s and ended at the 142 s, lasting for 20 s and releasing approximately 19.1% of the total moment. The length of the ruptured fault plane is about 490 km. The maximum width of the ruptured fault plane is about 45 km. The rupture mainly occurred within 30 km in depth under the surface of the Earth. The average static slip in the underground rocky crust is about 1.2 m with the maximum static slip 3.6 m. The average static stress drop is about 5 MPa with the maximum static stress drop 18 MPa. The maximum static slip and the maximum stress drop occurred in an area within 50 km to the east of the centroid position. 展开更多
关键词 digital seismograms inversion western Kunlun Mountain MS=8.1 earthquake source rupture process
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