【摘要】 井孔水温观测是地热观测网中主要的地震前兆观测方法。2007年宁洱6.4级地震前云南地区出现了群体性水温异常变化,包括中期趋势异常、短期异常和短临异常,短临异常出现在震前2个月以内,多数表现为温度升高,异常变化幅度在0.005~0.25℃之间;短期异常多数为震前温度下降,变化幅度在0.01~0.04℃之间;中期趋势异常中,既有上升型异常,也有上升转折型异常,变化幅度在0.03~0.4℃之间。这种配套性前兆异常有利于震前异常的识别和地震预测意见的提出。更多还原

【Abstract】 The bore-hole water temperature observation is a main earthquake precursor observation method of geothermal observation network.Before the 2007 Ning’er M6.4 earthquake in Yunnan,the bore-hole water temperature anomalies,including medium-term trend anomalies,short-term anomalies,and impending-earthquake anomalies,happened in groups in Yunnan.The impending-earthquake anomalies emerged in two months before the earthquake,most of which appeared as temperature rising,and the anomalous amplitude was 0.005-0.25℃.Of the short-term anomalies,most appeared as temperature dropping,and the anomalous amplitude was 0.01-0.04℃.The medium-term anomalies included rising type and rising-turning type,and the anomalous amplitude was 0.03-0.4℃.The appearance of these matched precursor anomalies is conducive to the identification of anomalies before an earthquake and putting forward earthquake prediction advice.更多还原