前兆异常对于地震预报具有非常重要的意义,在实际工作中,怎样来识别地震前兆异常,也就是怎样从各种观测手段所得到的千变万化的曲线形态中,客观地提取地震前兆异常作为我们地震预报的可靠根据,是一个非常重要的问题。一、问题的提出在实际观测中,我们常常遇到类似于 Precursory anomalies are very important for earthquake prediction. In practice, how to identify prehistoric anomalies, that is, how to extract objectively the prehistoric anomalies from the ever-changing curve shapes obtained from various observational methods as our earthquake prediction The reliable basis is a very important issue. First, the issue put forward In the actual observation, we often encounter similar