云南水汞在连发地震前短临异常及震后变化特征  

Short-impending anomalies of mercury in groundwater before the continual occurrence earthquake and their later changes in Yunnan, China

作　　者：杨杰英[1] 王永安[1] 张立[1] 

机构地区：[1]云南省地震局,云南昆明650041

出　　处：《华南地震》2003年第2期20-30,共11页South China Journal of Seismology

基　　金：十五"国家科技攻关项目2001BA601B01-02-03课题资助.

摘　　要：通过对1995年5月6日～1996年2月3日发生在云南境内及其中缅边境一带的4组5次M≥6 0级强震的研究,发现水汞在强震连发期都出现短临异常及震后变化;与2001年云南省内6组7次5 0～5 9级中强地震短临异常及震后变化进行比较,结果表明强震连发期水汞的短临异常特征表现为异常台站多、异常幅度大、异常范围广和多台站水汞在异常中发震。中强震连发期水汞的短临异常特征与此相反,表现为异常台站少、异常幅度小、异常范围小和多台站水汞在异常结束后发震。Based on the study of 4 group of 5 earthquakes with M≥60 which occurred in Yunnan and the boundary of China-Burma from May 6, 1995 to February 3, 1996, we found that there were some short-impending anomalies about mercury in groundwater and later-earthquake changes in continual occurrence period of strong earthquakes. The result shows that the short-impending anomaly of mercury in groundwater in their continual occurrence period characterized more anomaly stations, bigger anomaly amplitude, wider anomaly area and that earthquakes occurred in multi-station anomaly compared to 6 group of 7 medium-strong earthquakes with M50～59 occurred in Yunnan in 2001.On the contrary, short-impending anomalies of mercury in groundwater in continual occurrence period of medium-strong earthquakes characterized fewer anomaly station, smaller anomaly amplitude, smaller anomaly areas and earthquakes would occur after multi-station anomaly ending.

关 键 词：云南 水汞 短临异常 强震连发期 震后变化 地震前兆 

分 类 号：P316[天文地球—地震学] P315.72[天文地球—固体地球物理学]