Preliminary analysis on the source properties and seismogenic structure of the 2017 M (s)7.0 Jiuzhaigou earthquake

doi:10.1007/s11430-017-9161-y

CORC > 武汉植物园 > 中国科学院武汉植物园

	Preliminary analysis on the source properties and seismogenic structure of the 2017 M (s)7.0 Jiuzhaigou earthquake
	Shan, Bin 1; Ren, Junjie 8; Song, Meiqin 10; Xie, Zujun 1,2; Zheng, Yong 1; Yao, Huajian 3; Fang, Lihua 4; Ji, Lingyun 9; Zhang, Yong 5; Liu, Chengli 1
刊名	SCIENCE CHINA-EARTH SCIENCES
	2018-03-01
卷号	61 期号:3 页码:339-352
关键词	Jiuzhaigou earthquake Velocity structure Source parameters Seismogenic structure Seismic hazard
ISSN号	1674-7313
DOI	10.1007/s11430-017-9161-y
英文摘要	At GMT time 13:19, August 8, 2017, an M (s)7.0 earthquake struck the Jiuzhaigou region in Sichuan Province, China, causing severe damages and casualties. To investigate the source properties, seismogenic structures, and seismic hazards, we systematically analyzed the tectonic environment, crustal velocity structure in the source region, source parameters and rupture process, Coulomb failure stress changes, and 3-D features of the rupture plane of the Jiuzhaigou earthquake. Our results indicate the following: (1) The Jiuzhaigou earthquake occurred on an unmarked fault belonging to the transition zone of the east Kunlun fault system and is located northwest of the Huya fault. (2) Both the mainshock and aftershock rupture zones are located in a region where crustal seismic velocity changes dramatically. Southeast to the source region, shear wave velocity at the middle to lower crust is significantly low, but it rapidly increases northeastward and lies close to the background velocity across the rupture fault. (3) The aftershock zone is narrow and distributes along the northwest-southeast trend, and most aftershocks occur within a depth range of 5-20 km. (4) The focal mechanism of the Jiuzhaigou earthquake indicates a left-lateral strike-slip fault, with strike, dip, and rake angles of 152A degrees, 74A degrees and 8A degrees, respectively. The hypocenter depth measures 20 km, whereas the centroid depth is about 6 km. The co-seismic rupture mainly concentrates at depths of 3-13 km, with a moment magnitude (M (w)) of 6.5. (5) The co-seismic rupture also strengthens the Coulomb failure stress at the two ends of the rupture fault and the east segment of the Tazang fault. Aftershocks relocation results together with geological surveys indicate that the causative fault is a near vertical fault with notable spatial variations: dip angle varies within 66A degrees-89A degrees from northwest to southeast and the average dip angle measures similar to 84A degrees. The results of this work are of fundamental importance for further studies on the source characteristics, tectonic environment, and seismic hazard evaluation of the Jiuzhaigou earthquake.
资助项目	Monitoring and Forecasting Department, CEA ; Seismological Bureau Spark Program Project[XH15007] ; National Natural Science Foundation of China[41604058] ; National Natural Science Foundation of China[41574057] ; National Natural Science Foundation of China[41621091] ; Sichuan-Yunnan National Seismological Monitoring and Prediction Experimental Station Project[2016CESE0204]
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000426574800009
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/4725]
专题	中国科学院武汉植物园
通讯作者	Zheng, Yong
作者单位	1.China Univ Geosci, Inst Geophys & Geomat, Hubei Subsurface Multiscale Imaging Key Lab, Wuhan, Hubei, Peoples R China 2.Chinese Acad Sci, Inst Geodesy & Geophys, State Key Lab Geodesy & Earths Dynam, Wuhan, Hubei, Peoples R China 3.Univ Sci & Technol China, Sch Earth & Space Sci, Lab Seismol & Phys Earths Interior, Hefei, Anhui, Peoples R China 4.China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China 5.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 6.Hohai Univ, Coll Oceanog, Nanjing 210098, Jiangsu, Peoples R China 7.China Earthquake Adm, Inst Geol, State Key Lab Earthquake Dynam, Beijing 100029, Peoples R China 8.China Earthquake Adm, Inst Crustal Dynam, Key Lab Crustal Dynam, Beijing 100085, Peoples R China 9.China Earthquake Adm, Crust Monitoring & Applicat Ctr 2, Xian 710054, Shaanxi, Peoples R China 10.Shanxi Seism Bur, Natl Sci Field Observ Continental Rift Dynam Taiy, Taiyuan 030021, Peoples R China
推荐引用方式 GB/T 7714	Shan, Bin,Ren, Junjie,Song, Meiqin,et al. Preliminary analysis on the source properties and seismogenic structure of the 2017 M (s)7.0 Jiuzhaigou earthquake[J]. SCIENCE CHINA-EARTH SCIENCES,2018,61(3):339-352.
APA	Shan, Bin.,Ren, Junjie.,Song, Meiqin.,Xie, Zujun.,Zheng, Yong.,...&Zhang, Huiping.(2018).Preliminary analysis on the source properties and seismogenic structure of the 2017 M (s)7.0 Jiuzhaigou earthquake.SCIENCE CHINA-EARTH SCIENCES,61(3),339-352.
MLA	Shan, Bin,et al."Preliminary analysis on the source properties and seismogenic structure of the 2017 M (s)7.0 Jiuzhaigou earthquake".SCIENCE CHINA-EARTH SCIENCES 61.3(2018):339-352.