景东井水温异常变化与地震关系初探

PRELIMINARY ANALYSIS ON RELATIONGSHIP BETWEEN EARTHQUAKE AND PRECURSORY ANOMALY OF WATER TEMPERATURE OF JINGDONG WELL

系统分析景东观测井1998年以来的水温观测数据,研究水温前兆异常与地震之间的对应关系。结果表明,该井水源补给可能来自深部,水温变化不受季节性降雨渗入影响;震前异常全部为短期异常,以高温异常为主,短临异常突出,地震对应率50%,低温异常地震对应率80%;水温异常对发生在红河断裂和澜沧江断裂之间的地震指示意义最好,使用资料时考虑区域构造特点能很好地提高单个观测点的地震监视能力。

In this paper,the data of water temperature observed in Jingdong observation well since1998 were analyzed systematically,to study the correspondence between precursory anomalies of water temperature and earthquakes. The results show that the well water supply come from the deep,the water temperature change is not affected by seasonal rainfall infiltration; All anomalies before earthquakes were short-term anomalies,most of them were high temperature abnormalities,and its short temporary were very prominent. The probability of earthquakes occurred is 50% and 80% after water temperature risen and fallen. Water temperature anomalies have the best indication to earthquakes occurred between Honghe fault and Lancangjiang fault. Considering the characteristics of the regional structure can improve the seismic observation capability of a single observation point when using data.