• 责任者：Liu Baiyun (Lanzhou Institute of Seismology ; China Earthquake Administration ; Lanzhou 730000 ; China) ; Yuan Daoyang
• 刊名：Seismology and Geology
• 出版年：2012
• 卷期：34(3)
• 关键词：大震 ; great earthquakes ; 断层面 ; fault planes ; 走滑断层 ; strike-slip faults ; 甘肃 ; Gansu Province
• 页码：p.415-424
• 图表：4 illus., 2 tables, 27 refs.
• 分类号：0500
• issnNo：ISSN0253-4967
• isbnNo：CN11-2192/P

The southern Wudu M 8.0 great earthquake occurred in 1879,many places in Wudu and adjacent areas had suffered destruction in various degrees. Based on the assumption that clustered small earthquakes often occur in the vicinity of fault plane of large earthquake, and referring to the morphology of the major axis of the meizoseismal area obtained by the predecessors,the authors selected a stripshaped zone from the relocated earthquake catalog which occurred near the earthquake rupture zone in the period from 1985 to 2009 to calculate fault plane parameters of the earthquake, such as strike and dip,with the simulated annealing and GaussNewtonian nonlinear inversion algo rithms. On this condition, the rake angles of the fault plane are further inferred from regional tectonic stress parameters. The authors discussed the causal mechanism of the earthquake and finally identified the length and location of the seismogenic fault. In addition, clustered small earthquakes occurred frequently in the Xionghuangshan area west of the mezoseismal area, but the authors didn’t find clear fault planes in field investigation, so they should not have relation with the 1879 M 8 southern Wudu earthquake.