我们利用激光锁相应变仪、基岩地电仪、天电仪及气象仪器同时观测基岩应变、基岩地电、电磁辐射包络及气象等地震前兆。通过观测发现:突变前兆对于临震预报具有重要意义,并且它们具有多样性、全球性、相互独立性、反向特性、前兆模式的重复性、周期(或准周期)性、周期性前兆波形的相似性及这 We use laser-locked strain gauges, bedrock earthquakes, sky anemometers, and meteorological instruments to simultaneously observe bedrock earthquakes, bedrock earthquakes, electromagnetic radiation envelopes and weather precursors. It is found through observation that the precursors of mutation are of great significance to the prediction of imminent earthquakes and they have the characteristics of diversity, globality, mutual independence, reverse characteristics, repeatability of precursor modes, periodic (or quasi-periodic), periodic precursors Similarity and this