Abstract: According to stress field of the focal area, six types of earthquakes may be recognized, i. e. tension, compression, contortion and their transitional types. In the Xinfen-gjiang reservoir the main shock and most aftershocks of Ms>3 belong to the contortion type and are the same as most tectonic shocks outside the reservoir area. But in the last decade or so, the most microseisms belong to the tension type. The aftershocks have a more complicated driving mechanism than the main shock.In present, the seismic magnitude in Xinfengjiang areas correlates with the energy release of continental China but with a time lag. It has been a general view that a strong earthquake sequence in the neighboring regions may cause considerable events in the induced seismic reservoir.

摘要： 本文综合分析新丰江水库自1962年主震以来,3级以上地震和微震的震源应力场的特点。著者对震源破裂类型作了划分,并探讨了新丰江水库不同阶段3级以上余震和微小余震的破裂类型的异同。最后指出,诱震水库可视为反映广大地区地震活动的敏感点。