甘东南4井水温资料在汶川M_S8.0地震前后的异常变化特征分析  

Characteristics analysis on the abnormal changes of the water temperature before and after the Wenchuan M_S8.0 form 4 wells located in southeast of Gansu

作　　者：蒲小武 梅东林 陈彦平 叶媛媛 王军燕 许可娟 

机构地区：[1]甘肃省地震局陇南中心地震台,甘肃陇南746000

出　　处：《国际地震动态》2014年第2期17-23,共7页Recent Developments in World Seismology

摘　　要：较为系统地分析了甘东南成县、樊坝、清水温泉、两水4口水温井自2007年以来的水温观测数据,发现在2008年5月12日汶川MS8.0地震前后4口水温井资料都出现了不同程度的前兆异常变化,但前兆异常信息大部分淹没在趋势上升的背景中。为了更好地提取前兆异常信息,文中采用了流体资料处理时常用的差分法、变差率法、从属函数法、趋势速率法等前兆异常信息提取方法,对数据进行了处理,并分析了4井水温前兆异常变化特征。This paper systematically analyzes water temperature observation data since 2007 from 4 wells Chenxian, Fanba, Qingshui and Liangshui which are located in southeast of Gansu. It is found in 2008, before and after the May 12 wenchuan Ms8.0, water tempera- ture of 4 wells appeared different degree of precursory anomaly changes, but most abnormal precursory informations submerged in the background of the rising trend. In order to extract precursory anomaly information, methods such as the difference method, the variable rate method, the subordinate function method and trend rate method which are often used in fluid data processing are adopted to exact the abnormal precursory information, and analyze the changes of water temperature anomalies.

关 键 词：水温前兆异常 差分法 变差率 从属函数 趋势速率 

分 类 号：P315.723[天文地球—地震学]