Imaging Crustal Heterogeneity in Jiashi Strong Earthquake Swarm Region by Coda Envelope Inversion Analysis

2009 ◽  
Vol 52 (1) ◽  
pp. 40-50
Author(s):  
Qin-Cai WANG ◽  
Zhan-Li CHEN ◽  
Y. Asano ◽  
Si-Hua ZHENG ◽  
A. Hasegawa
Keyword(s):  
Strong Earthquake ◽  
Earthquake Swarm ◽  
Jiashi Strong Earthquake Swarm ◽  
Crustal Heterogeneity ◽  
Inversion Analysis

Tomographic Determination of the Upper Crustal Structure in Jiashi Strong Earthquake Swarm Region-Joint Inversion of Explosion and Earthquake Data

2007 ◽  
Vol 50 (5) ◽  
pp. 1265-1273
Author(s):  
Su-Zhen PAN ◽  
Xian-Kang ZHANG ◽  
Zhuo-Xin YANG ◽  
Cheng-Ke ZHANG ◽  
Jin-Ren ZHAO ◽  
...  
Keyword(s):  
Crustal Structure ◽  
Strong Earthquake ◽  
Joint Inversion ◽  
Earthquake Swarm ◽  
Jiashi Strong Earthquake Swarm ◽  
Earthquake Data

Basement interface structural characteristics beneath Jiashi strong earthquake swarm area in Xinjiang, China

2007 ◽  
Vol 20 (5) ◽  
pp. 507-512
Author(s):  
Zhao-fan Xu ◽  
Yong-hong Duan ◽  
Xiao-feng Tian ◽  
Ji-shun Pan ◽  
Jian-shi Zhang ◽  
...  
Keyword(s):  
Strong Earthquake ◽  
Structural Characteristics ◽  
Earthquake Swarm ◽  
Jiashi Strong Earthquake Swarm

Tomographic determination of the upper crustal structure in the Jiashi strong earthquake swarm region

2002 ◽  
Vol 15 (2) ◽  
pp. 162-170 ◽  
Author(s):  
Zhuo-xin Yang ◽  
Jin-ren Zhao ◽  
Xian-kang Zhang ◽  
Cheng-ke Zhang ◽  
Shuang-xi Cheng ◽  
...  
Keyword(s):  
Crustal Structure ◽  
Strong Earthquake ◽  
Earthquake Swarm ◽  
Jiashi Strong Earthquake Swarm

scholarly journals Source model for the Mw 6.0 earthquake in Jiashi, China on 19 January 2020 from Sentinel-1A InSAR data

2020 ◽  
Author(s):  
Pengfei Yu ◽  
Xuejun Qiao ◽  
Wei Xiong ◽  
Wei Chen ◽  
Zhaosheng Nie ◽  
...  
Keyword(s):  
Transition Zone ◽  
Strong Earthquake ◽  
Earthquake Swarm ◽  
European Space Agency ◽  
Descent Method ◽  
Steepest Descent Method ◽  
Western China ◽  
Coseismic Deformation ◽  
Coulomb Stress Changes ◽  
Stress Changes

Abstract On January 19, 2020, an Mw 6.0 earthquake occurred in Jiashi, Western China. The epicenter was located at the basin-mountain boundary between the southern Tian Shan and the Tarim Basin. Many strong earthquakes occurred in this region, such as the 1997 Jiashi strong earthquake swarm. In this study, Interferometric Synthetic Aperture Radar (InSAR) was used to obtain the coseismic deformation field from the ascending and descending Sentinel-1A satellite data of the European Space Agency. The results showed that the coseismic deformation was distributed along the Kalpingtag fault and the Ozgertaou fault. The earthquake produced significant deformation over an area of approximately 40 km by 30 km. The long axis of the deformation was near the east-west direction. The maximum and minimal displacements along the line of sight (LOS) were 5.3 cm, 7.2 cm and -4.2 cm, -3 cm for the ascending and descending interferograms, respectively. The slip model inverted by the steepest descent method demonstrated that the rupture process of this earthquake is dominated by a thrust fault. The slips were concentrated in a depth of 3.5 ~ 6.5 km. The maximum slip was 0.29 m. The estimated total seismic moment was 1.728×1018 Nm, corresponding to a magnitude of Mw 6.09. The inversion revealed that the coseismic rupture was located at the transition zone between the shallow high-dip fault and the deep detachment fault. The geometry of the coseismic rupture is direct evidence of the deep attitude of the Kalping fault, indicating the possibility of independent earthquakes at the shallow ramp-to-flat transition zone of an orogenic belt. The coseismic Coulomb stress changes have enhanced the stress on the deep margin of the Jiashi earthquake rupture area, indicating that there is still the possibility of another strong earthquake in this region in the future.

The Ordered Network Structure of M ≥ 6 Strong Earthquakes and Its Prediction in the Jiangsu–South Yellow Sea Region

2013 ◽  
Vol 68 (5) ◽  
pp. 371-379 ◽  
Author(s):  
Ke-Pei Men ◽  
Lei Cui
Keyword(s):  
Network Structure ◽  
Yellow Sea ◽  
Strong Earthquake ◽  
Earthquake Swarm ◽  
South Yellow Sea ◽  
The South ◽  
Trend Prediction ◽  
Strong Earthquakes ◽  
The Future ◽  
The South Yellow Sea

The the Jiangsu-South Yellow Sea region is one of the key seismic monitoring defence areas in the eastern part of China. Since 1846, M ≥ 6 strong earthquakes have showed an obvious commensurability and orderliness in this region. The main orderly values are 74∼75 a, 57∼58 a, 11∼12 a, and 5∼6 a, wherein 74∼75 a and 57∼58 a with an outstanding predictive role. According to the information prediction theory of Wen-Bo Weng, we conceived the M ≥ 6 strong earthquake ordered network structure in the South Yellow Sea and the whole region. Based on this, we analyzed and discussed the variation of seismicity in detail and also made a trend prediction of M ≥ 6 strong earthquakes in the future. The results showed that since 1998 it has entered into a new quiet episode which may continue until about 2042; and the first M ≥ 6 strong earthquake in the next active episode will probably occur in 2053 pre and post, with the location likely in the sea area of the South Yellow Sea; also, the second and the third ones or strong earthquake swarm in the future will probably occur in 2058 and 2070 pre and post.

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