THE MECHANISM OF SHALLOW LAYERS ANOMALY CAUSED BY GROUNDWATER AND ITS RELATED QUESTION IN EARTHQUAKE PREDICTION

Based on the mechanism to induce groundwater anomaly, the interferences of precursory anomaly and its recognition are discussed, and the view of "rain and groundwater interference" is questioned.5 indexes of anomaly are presented.The method we use first is loading and unloading response ratio.We also put forward a model of "long term, medium term, short term and imminent combining prediction" and a consideration of unified prediction of all kinds method.