本申请项目拟通过资料收集和整理、野外地质调查、室内数据处理、计算分析等方法，通过对国家地震前兆台网中心数据库中的300多口地下水位观测井孔进行筛选，分析地下水位固体潮畸变与地震在时间、地震及震源机制之间的关系。通过对重点研究区内典型井孔进行调和分析、滤波、频谱分析等手法和方法对经过降雨、气压改正后的水位数据进行分析，得出水位固体潮畸变的内在特征。并将水位观测资料与体应变、地形变等观测资料进行对比分析，揭示地下水位震前固体潮畸变的原因与机理。本项目的研究对于深入理解地下水对地震的响应机理，尤其对于应用地下水位观测进行地震预测探索等具有重要的理论和实际意义。

The purpose of this project is to study the characteristic of distortion of earth tide prior to earthquakes. We will choose 20-30 groundwater monitoring wells from the database of China Earthquake Network Center. Tidal analysis, spectral analysis and filter analysis will be used in the study. Also, we will carry out field geological surveying, field test, and indoor analysis to collect data. From this, we will study the impact of geological setting and well-aquifer system distortion of earth tide and learn the mechanism of distortion of earth tide before earthquakes. This study will help us understand better about the mechanism of groundwater changes following the earthquake, and may provide a new approach for the earthquake prediction.