Spatial variations of b-values in the coastal area of Guangdong
文献类型：期刊论文
| 作者 | Zhou, PX; Xia, SH; Sun, JL; Cao, JH; Xu, HL; Zhao, F; Chen, CX; shxia@scsio.ac.cn |
| 刊名 | JOURNAL OF OCEAN UNIVERSITY OF CHINA
 |
| 出版日期 | 2018 |
| 卷号 | 17期号:1页码:177-185 |
| 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. |
| 学科主题 | Oceanography |
| WOS关键词 | b-values ; earthquake ; Guangdong ; seismogenic area ; stress |
| 资助项目 | MSG |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17159]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 通讯作者 | shxia@scsio.ac.cn |
| 推荐引用方式 GB/T 7714 | Zhou, PX,Xia, SH,Sun, JL,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, PX.,Xia, SH.,Sun, JL.,Cao, JH.,Xu, HL.,...&shxia@scsio.ac.cn.(2018).Spatial variations of b-values in the coastal area of Guangdong.JOURNAL OF OCEAN UNIVERSITY OF CHINA,17(1),177-185. |
| MLA | Zhou, PX,et al."Spatial variations of b-values in the coastal area of Guangdong".JOURNAL OF OCEAN UNIVERSITY OF CHINA 17.1(2018):177-185. |
入库方式： OAI收割
来源：南海海洋研究所
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