From may to july 1979, the microseismicity was decreasing as a whole . 从1979年5月到7月，总的来看微震活动下降。
2.
The results show that in the later stage of the nucleation process , the maximum slip velocity is monotonically accelerating ; the slipping hot spot ( where the slip rate is maximum ) migrates spontaneously from a certain instant , and such migration is spatially continuous ; when the maximum velocity reaches a detectable order of magnitude ( at least one order of magnitude greater than the loading rate ) , the remaining time is 20 hours or more , and the temporal variation of slip velocity beyond this point may be used as a precursory indicator ; the average slip velocity is related to the remaining time by a log - log linear relation , which means that a similar relation between rate of microseismicity and remaining time may also exist ; when normal stress variation is taken into account , time scale of such processes can be extended by about 2 times 结果表明，在成核的后期阶段：最大位移速率单调加速增加；滑动热点（最大滑动速率处）在后期阶段开始自发性迁移，且在空间上连续；当最大滑动速率达到可以明显探测的量级时（高于载入速率一个数量级以上） ，倒计时间为20小时或更长一些，这时的速率变化可作为临震预测标志；平均滑动速率与倒计时间的关系在临震阶段呈对数线性趋势，由此可推测微震活动增长率与倒计时间同样存在对数线性关系；正应力的变化对上述时间尺度有延长作用，使之大致增加到原数值的2倍。
