Spatial variations of b-values in the coastal area of Guangdong
Zhou, Pengxiang1,2; Xia, Shaohong1; Sun, Jinlong1; Cao, Jinghe1; Xu, Huilong1; Zhao, Fang1; 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)
2018-02-01
发表期刊JOURNAL OF OCEAN UNIVERSITY OF CHINA
卷号17期号:1页码:177-185
产权排序第1完成单位 ; 第2完成单位 ; 第3完成单位
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.
文章类型Article
关键词B-values Earthquake Guangdong Seismogenic Area Stress
WOS标题词Science & Technology ; Physical Sciences
DOI10.1007/s11802-018-3457-2
URL查看原文
收录类别SCI
语种英语
关键词[WOS]FREQUENCY-MAGNITUDE DISTRIBUTION ; EARTHQUAKE-SIZE DISTRIBUTION ; SUBDUCTION ZONES ; CALIFORNIA ; ASPERITIES ; DEPTH ; MICROSEISMICITY ; SEISMICITY
WOS类目Oceanography
WOS记录号WOS:000419533800018
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符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
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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.
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