引言新丰江水库自蓄水后,发生了一系列地震。区内存在三件基本事实:一、河源断裂近期具左旋错动;二、地震主要沿水库狭谷区呈北西西向分布,河源断裂本身很少地震活动;三、震源机制解表明,主张应力轴(T)稳定于北北东向,近于水平,主压应力轴(P)则在垂 INTRODUCTION After a series of earthquakes occurred in Xinfengjiang Reservoir since impounding. There are three basic facts in the area: first, the Heyuan fault has a left-lateral dislocation in the near future; secondly, the earthquake mainly distributes along the northwest and southwest of the reservoir valleys, while the Heyuan fault itself has little seismic activity; third, focal mechanism solution shows that the stress axis (T) is stable in NE direction, near horizontal, and the principal compressive stress axis (P) is in vertical direction