Abstract

Studies on the earthquake sequences and the source mechanisms of the strong earthquakes show that Yunnan has more obvious subarea characteristics of earthquake type. Strike-slip seismic fault and mainshock-aftershock earthquake sequences are dominant in whole Yunnan area. Considering the ratio of non strike-slip faults and non mainshock-aftershock, Yunnan area can be divided into four subareas with different characteristics, which are strike-slip mainshock-aftershock in central Yunnan (A1), incline-slip swarm in northwestern Yunnan (A2), strike-slip double shocks in western Yunnan (B1) and quasi-strike-slip mainshock-aftershock in southwestern Yunnan (B2), respectively.

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