摘要
In this paper, using focal mechanism solutions of moderate-strong earthquakes in Yunnan Province and its adjacent areas, the authors discussed in detail the earthquake fault types and the characteristics of modern tectonic stress field in Yunnan Province. The results show that most moderate-strong earthquakes occurring in Yunnan Province are of the strike-slip type, amounting to 80% of the total. Normal faulting and normal with strike-slip and reverse and reverse with strike-slip earthquakes are almost equivalent in proportion, about 8% each, respectively. The tectonic stress field of Yunnan is near-horizontal, and the dips of earthquake fault planes are large.