小江断裂带地下流体记震能力分析

Earthquake Reflecting Capacity of Groundwater around Xiaojiang Fault Zone

收集并整理了云南地区小江断裂带附近十口流体观测井对印度尼西亚苏门答腊4次8级以上地震的响应资料,并对各观测井的记震能力及其流体测项间的响应协调性进行了统计分析。分析结果显示:物理量观测项的记震能力强于化学量观测项,水位测项的记震能力强于水温测项;小江断裂带南端各观测点的记震能力强于中部及北端各观测点;水位的同震响应形态多表现为震时振荡,而水温则多表现为震时脉冲下降。最后分析了记震协调性较好的高大、弥勒和嵩明三井的记震特征。

Co-seismic changes of ten wells around Xiaojiang fault zone aroused by four Ms〉8.0 earthquakes in Sumatra, Indonesia was collected, and the earthquake reflecting capacities and harmonizing characters between water levels and temperatures were analyzed. The results reveal that the reflecting capacity of physics observation is better than that of chemical observation, and water level can reflect more earthquakes than water temperature. The wells around the south of the Xiaojiang fault zone have stronger capacity of co-seismic response waves than the north ones. The response forms of water levels are mostly fluctuating, whereas water temperatures are mostly descending. Former researches on co-seismic mechanism of groundwater are summarized. Finally,reflecting characters of Gaoda, Mile and Songming wells are analyzed, which have more harmonizing co-seismic phenomena.