Spatial variations of b-values in the coastal area of Guangdong

doi:10.1007/s11802-018-3457-2

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海地球物理与资源研究室

	Spatial variations of b-values in the coastal area of Guangdong
	Zhou, Pengxiang 1,2; Xia, Shaohong 1; Sun, Jinlong 1; Cao, Jinghe 1; Xu, Huilong 1; Zhao, Fang 1; Chen, Chuanxu3 ; Xia, Shaohong(Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China)
刊名	JOURNAL OF OCEAN UNIVERSITY OF CHINA
	2018-02-01
卷号	17 期号:1 页码:177-185
关键词	B-values Earthquake Guangdong Seismogenic Area Stress
DOI	10.1007/s11802-018-3457-2
产权排序	第1完成单位 ; 第2完成单位 ; 第3完成单位
文献子类	Article
英文摘要	We used earthquake catalogs recorded by Guangdong Seismological Network from 2008 to 2014 to resolve the spatial variations of b-values in the coastal area of Guangdong, particularly in three key research areas (Yangjiang, Heyuan, and offshore Nanao Island) with strong seismicity. Our results revealed that b-values exhibited significant spatial variations, and zones with low b-values could indicate the most likely seismogenic area of large earthquakes. We observed three clear low b-value patches in the offshore Nanao Island. We found a distinct high b-value peak at the depth of 11 km and two minimum peaks at about 14 and 7-8 km in the Yangjiang area. The overall b-values generally decrease with depth in the Heyuan area. The spatial variations of b-values reflect tectonic anomalies; that is, the 'low-high-low' distribution of b-values in the offshore Nanao Island and the Yangjiang area may indicate the anomaly of the crustal structure with a weak layer. The b-values of reservoir-induced seismicity are obviously lower than that induced by tectonism. This finding indicates that the reservoir area is generally at high stress state under the condition of high pore pressure. We inferred that large earthquakes might be prone to occur at 10-12 km depth in the offshore Nanao Island, at 12-15 km depth in the Yangjiang area, and at the lower part of the seismic activity zone in the Heyuan area. Moreover, the upstream area of the Xinfengjiang reservoir is the most likely area of future large earthquakes in the Heyuan area.
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WOS关键词	FREQUENCY-MAGNITUDE DISTRIBUTION ; EARTHQUAKE-SIZE DISTRIBUTION ; SUBDUCTION ZONES ; CALIFORNIA ; ASPERITIES ; DEPTH ; MICROSEISMICITY ; SEISMICITY
语种	英语
WOS记录号	WOS:000419533800018
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/5263]
专题	深海科学研究部_深海地球物理与资源研究室
通讯作者	Xia, Shaohong; Xia, Shaohong(Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China)
作者单位	1.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Pengxiang,Xia, Shaohong,Sun, Jinlong,et al. Spatial variations of b-values in the coastal area of Guangdong[J]. JOURNAL OF OCEAN UNIVERSITY OF CHINA,2018,17(1):177-185.
APA	Zhou, Pengxiang.,Xia, Shaohong.,Sun, Jinlong.,Cao, Jinghe.,Xu, Huilong.,...&Xia, Shaohong.(2018).Spatial variations of b-values in the coastal area of Guangdong.JOURNAL OF OCEAN UNIVERSITY OF CHINA,17(1),177-185.
MLA	Zhou, Pengxiang,et al."Spatial variations of b-values in the coastal area of Guangdong".JOURNAL OF OCEAN UNIVERSITY OF CHINA 17.1(2018):177-185.