地下水位固体潮加卸载响应比分析及预测意义

Analysis on the results of loading/unloading response ratio of groundwater level earth tide and its significance in earthquake prediction

应用加卸载响应比的理论原理,对广东地下水位网的观测数据进行加卸载响应比计算,以广东及周边地区数次MS4 0级以上地震作为震例,提取可能的中期至短期的响应比异常变化,研究其异常特征以及与地震的对应关系。结果表明,在中强地震前响应比存在增大变化,大多数井的水位固体潮响应比在发震前1～4个月出现升高异常变化。

Using method of loading/unloading response ratio, the observation data of groundwater level network in Guangdong are processed. Taking several earthquakes over 4.0 in Guangdong and its neighboring areas as examples, the potential anomalous changes of response ratio from mid-term to short-term are selected, and its features and corresponding relations with earthquakes are studied. The result shows that the response ratio increases before moderate-strong earthquake. It heightens before earthquake occurring within 1to 4 months at most of wells.