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发生地震前后,在蠕变仪、伸缩仪的记录曲线上常出现一些跃变,显示了断层蠕动,一般释放能量不大,应力降较小。在断层蠕动及其传播过程中,断层两盘从静止到相对缓慢滑动,在其前进方向上受阻(或是断面上存在凹凸不平的部位)产生慢速破裂,激发起较长周期的弹性波辐射,被一些动态前兆观测仪器所记录到。在发生断层蠕动时,有时能听到隆隆地声,感到明
Occurred before and after the earthquake, creep instrument, telescopic instrument record curve often appear some jump, showing the fault peristalsis, the general release of energy is not small, the stress drop is small. During the fault peristalsis and its propagation, the two plates of the fault slide from standstill to relatively slow, which causes a slow rupture in the advancing direction (or the uneven part in the section), which causes the elastic wave radiation with a longer period , Was recorded by some dynamic precursor observation instruments. In the event of peristalsis, sometimes hear the rumbling sound, feel bright