乐都地震台前兆测项在门源6.4级地震前后的异常变化分析  

ANALYSIS ON ABNORMAL CHANGE OF PRECURSORS IN LEDU SEISMIC STATION BEFORE AND AFTER MENYUAN M6.4 EARTHQUAKE

作　　者：陈永花[1] 张超美[1] 

机构地区：[1]青海省地震局湟源地震台,青海湟源812100

出　　处：《高原地震》2017年第3期16-20,共5页Plateau Earthquake Research

摘　　要：通过对2016年门源6.4级地震前后乐都台土壤气氡、浅层水温、分量钻孔应变和水平摆倾斜等前兆测项资料分析,认为土壤气氡于2015年12月19日至2016年3月底出现偏离正常动态的上升型变化为前兆异常;浅层水温和钻孔应变在震前出现了不同程度的异常变化;水平摆倾斜仪由于自身的原因自架设以来一直不稳定,出现的异常经分析是观测技术系统干扰所致;垂直摆倾斜仪运行时间较短,没有发现明显的短临异常变化。The fault gas radon, water temperature , borehole strain , component borehole tilt and other precur- sory data of Ledu seismic station are analyzed before and after Menyuan M6.4 earthquake. The results show that the values of gas radon in December 19, 2015 to the end of March 2016 were raised and deviated from the normal dynamic change; the water temperature and borehole strain showed abnormal changes in different de- gree before the earthquake ; the data of horizontal pendulum tihmeter were unstable because of the instrument, and the abnormal may be the interference of the observation system; vertical pendulum tihmeter ran shorter time and its obvious change in short impending anomaly detection did not find.

关 键 词：异常分析 土壤气氡 浅层水温 分量钻孔应变 乐都地震台 

分 类 号：P315.723[天文地球—地震学]