Analysis on small-earthquake composite fault plane solutions from 1961 to 1999 in Xinfengjiang reservoir area

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• 作者：Gui-an Guo (1)
  Te-pei Liu (2)
  Nai-gang Qin (2)
  Li-fen Chen (2)
  
• 关键词：Xinfengjiang reservoir ; Mohr’s stress circle ; focal mechanism ; P315.3
• 刊名：Earthquake Science
• 出版年：2004
• 出版时间：May 2004
• 年：2004
• 卷：17
• 期：3
• 页码：287-295
• 全文大小：630KB
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• 作者单位：Gui-an Guo (1)
  Te-pei Liu (2)
  Nai-gang Qin (2)
  Li-fen Chen (2)
  
  1. Shenzhen Seismostation, 518003, Shenzhen, China
  2. Earthquake Administration of Guangdong Province, 510070, Guangzhou, China
  
• ISSN：1867-8777

文摘

To understand the earthquake characteristics in Xinfengjiang (XFJ for short) reservoir area, we collected the small earthquakes occurred in the area from 1961 to 1999. We segmented this 40-year period, parted the research region and calculated the composite fault plane solution of each block, discussed the effect characteristics of stress field of water pressure using Mohr’s stress circle. The final result shows that the main rupture pattern was very different before and after the M=6.1 main shock, changing from strike slip to normal rupture. The maximum principal stress axes of composite fault plane solutions are characterized by synchronous change with water level.