甘孜地震台水氡观测资料的干扰识别和短临异常分析
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摘要
系统整理了甘孜地震台自有水氡观测以来的数据,分析了观测数据中的各种干扰因素,并研究了在该台200km范围内的5级以上地震、300km内的6级以上地震前水氡的短临异常特征。结果表明,1974年以来甘孜水氡多次出现中短期异常变化,异常具有破年变、相关关系改变等特点,水氡异常的产生与水温、流量因素有关,更与岩石应力—应变、地壳构造活动等有关。短临异常出现的时间大多集中在1个月内,异常形态以突升、突降为主,异常变化的幅度在10%以上,异常幅度的大小与地震震级的大小并无明显的相关性。
The observatory data of the radon in groundwater in Ganzi Seismic Station since the station was built up is systematically processed and the several interfering factors are analyzed.We have studied the characteristics of the connections among the radon changes in groundwater and the earthquakes above M5.0 occurred within the distance of 200km,and M6.0 within 300km around the seismic station.Our results show that since 1974 when the observatory data were recorded,the radon contents in groundwater presented anomaly changes of mid-short term for several times.These anomalies have features of breaking the annual changes and changing the correlation coefficient.The anomaly changes of radon content in groundwater are related to the temperature,the flow of groundwater,and the changes of rock stress-strain and the crust activity.The time of most short-imminent anomalies is concentrated within 1 month,the anomaly forms show sudden increase and decrease,and the amplitude is above 10%.There is no obvious correlation between the anomaly amplitude and the magnitude.
The observatory data of the radon in groundwater in Ganzi Seismic Station since the station was built up is systematically processed and the several interfering factors are analyzed.We have studied the characteristics of the connections among the radon changes in groundwater and the earthquakes above M5.0 occurred within the distance of 200km,and M6.0 within 300km around the seismic station.Our results show that since 1974 when the observatory data were recorded,the radon contents in groundwater presented anomaly changes of mid-short term for several times.These anomalies have features of breaking the annual changes and changing the correlation coefficient.The anomaly changes of radon content in groundwater are related to the temperature,the flow of groundwater,and the changes of rock stress-strain and the crust activity.The time of most short-imminent anomalies is concentrated within 1 month,the anomaly forms show sudden increase and decrease,and the amplitude is above 10%.There is no obvious correlation between the anomaly amplitude and the magnitude.
引文
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车用太,谷元珠,金鱼子,等.2002.昆仑山口西8.1级地震前地下流体的远场异常及其意义[J].地震,22(44):106-113.
程万正.1994.四川中短期地震预报研究[M].成都:成都地图出版社.
何崇君,王新,赵小茂,等.2005.临潼台氢气异常与地震的对应关系研究[J].华北地震学报,23(3):37-40.
何崇君,王新,赵小茂,等.2006.华清4#泉水溶气体百分含量合计的强震远场前兆特征[J].地震研究,29(3)234-238.
李菊珍,兰丛欣,等.2004.北京数字化地电阻率干扰识别与异常分析[J].防灾技术高等专科学校学报,6(4)9-13.
刘仕锦,李学川,李志鹏,等.2006.康定温泉逸出气短期预测研究[J].四川地震,(2):43-47.
四川省地震局.1979.一九七六年松潘地震[M].北京:地震出版社.
四川省地震局.1989.鲜水河活动断裂带[M]成都:四川科学技术出版社.
王长岭,唐丰年,杨玉荣.1982.地下水含氡量观测与地震预报探索[M].北京:国家地震局监测处.
王云基,李正中.1999.地震地下流体观测技术研究与应用[M].成都:成都地图出版社.
中国地震局科技监测司.1995.地震地下水手册[M].北京:地震出版社.
中国地震局监测预报司.2000.地震前兆异常落实工作指南[M].北京:地震出版社.
中国地震局监测预报司.2002.强地震中短期预报方法及其效能研究[M].北京:地震出版社.
中国地震局监测预报司.2002.地下流体数字观测技术[M].北京:地震出版社.
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