Based on the analysis of the data from 414 earthquakes, we get the conclusion that geomagnetism and underground water level observations are the fairly good precursor methods.

• 遵照“地震监测能力好的前兆手段，在其监测范围内，有震时应有较高的异常比，无震时应有较低的异常比”的原则，我们认为地磁和地下水位是比较好的前兆观测方法。