华南地震2025，Vol.45Issue(1)：59-67,9.DOI:10.13512/j.hndz.2025.01.08
洱源滇20井水温异常特征分析与机理研究
Characteristics and Mechanism of Water Temperature Anomalies in Eryuan Dian 20 Well
摘要
Abstract
Based on the earthquake cases,the water temperature observation data of the Eryuan Dian 20 well were analyzed.The results showed that the water temperature anomaly has a good short-term indicating significance for the occurrence of medium strong earthquakes in the 200 km area around the measurement point.Before the earthquake,the anomalies mostly showed a downward change,lasting for 2-6 months,with a change range of 100‰ to 400‰℃.Earthquakes occurred either during the ongoing thermal anomaly phase or within two months after the anomaly continued.Based on the summarized abnormal characteristics and combined with hydrochemical analysis,temperature gradient analysis,and water level observation analysis,the possible causes of the anomalies were studied.The reason for the abnormal water temperature in the Eryuan Dian 20 well may be due to enhanced regional tectonic activity.Under the action of tension,the decrease in pore pressure causes the well water to flow back into the aquifer,leading to thermal convection inside the wellbore and the decrease of the water temperature at the sensor location.关键词
洱源滇20井/水温观测/异常特征/异常机理Key words
Eryuan Dian Well 20/Water temperature observation/Anomaly characteristic/Anomaly mechanism分类
地球科学引用本文复制引用
字承柱,张翔,张源,杨树锋..洱源滇20井水温异常特征分析与机理研究[J].华南地震,2025,45(1):59-67,9.
