井孔水温异常与2007年宁洱6．4级地震关系分析  

Relationship of Bore-hole Water Temperature Anomaly and the 2007 Ning'er M6.4 Earthquake

作　　者：刘耀炜[1] 孙小龙[1] 王世芹[2] 任宏微[1] 

机构地区：[1]中国地震局地壳应力研究所,北京100085 [2]云南省地震局,昆明650224

出　　处：《地震研究》2008年第4期347-353,共7页Journal of Seismological Research

基　　金：“十一五”国家科技支撑计划(2006BA601B02-03);中央级公益性科研院所基本科研业务专项(J2207812)联合资助

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。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 betore 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.

关 键 词：宁洱地震 地热观测 水温异常 前兆 云南 

分 类 号：P315.7[天文地球—地震学] U472.43[天文地球—固体地球物理学]