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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
Source PublicationJOURNAL OF OCEAN UNIVERSITY OF CHINA
Volume17Issue:1Pages:177-185
Contribution Rank第1完成单位 ; 第2完成单位 ; 第3完成单位
AbstractWe 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.
SubtypeArticle
KeywordB-values Earthquake Guangdong Seismogenic Area Stress
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11802-018-3457-2
URL查看原文
Indexed BySCI
Language英语
WOS KeywordFREQUENCY-MAGNITUDE DISTRIBUTION ; EARTHQUAKE-SIZE DISTRIBUTION ; SUBDUCTION ZONES ; CALIFORNIA ; ASPERITIES ; DEPTH ; MICROSEISMICITY ; SEISMICITY
WOS SubjectOceanography
WOS IDWOS:000419533800018
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.idsse.ac.cn/handle/183446/5263
Collection深海科学研究部_深海地球物理与资源研究室
Corresponding AuthorXia, Shaohong; Xia, Shaohong(Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China)
Affiliation1.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
Recommended Citation
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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