郯城马陵山地震台视电阻率年变特征研究

依据马陵山地震台台站仪器安装日志等基础资料，结合现场勘察结果建立三维有限元模型，并综合水位、降雨及气温等辅助观测资料，对台站近10 a的视电阻率资料进行对比分析。因台站地处郯庐断裂带安丘-莒县断裂上，地下结构复杂，EW向观测电极存在高差，视电阻率特征清晰且复杂。综合研究认为，马陵山地震台NS向视电阻率的变化主要受气温影响；EW向视电阻率主要受水位变化影响，且水位影响的量级约为气温的3倍；7~8月2个方向同时受短暂快速降雨的影响。

Analysis on the Annual Variation Characteristics of Apparent Resistivity at Malingshan Seismic Station in Tancheng

Based on basic data, such as the installation log of Malingshan seismic station, combined with field survey results, we make a comparative analysis of the apparent resistivity data of the station in the past 10 years using the three-dimensional finite element method and combining auxiliary observation data such as water level, rainfall and air temperature. Because the station is located in Anqiu-Juxian fault of Tanlu fault zone, the underground structure is relatively complex. There is a height difference between the measuring electrodes at EW oriented, and the apparent resistivity characteristics are clear and complex. The comprehensive study shows that the NS apparent resistivity change of the station is mainly affected by the temperature, the EW apparent resistivity is mainly affected by the water level change, and the water level influence magnitude is about three times that of the temperature. In July and August, the two directions are affected by the short-term rapid rainfall at the same time.