陕西几例特殊的无震异常及其成因分析
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摘要
介绍了陕西省前兆台网记录到的几例特殊的无震异常．分析了这些异常产生的原因．认为１９８６ 年和１９９６ 年渭南双王井水位的２ 次无震异常与渭河的洪峰有关；１９７７ 年韩城地震台地倾斜特大异常可能与黄河水位变化有关；１９８３ 年安康地震台地倾斜特大异常与该地区特大洪水有关；１９９６ 年和１９９８ 年三原井水位的２ 次特大异常可能与附近的冯村水库蓄水有关
Some special aseismic precursory anomalies obtained from Shaanxi precursory network are presented.Analysing the cause of these anomalies,following views are got:the two anomalies of groundwater level of Shuangwang well,Weinan in 1986 and 1996 may be caused by the flood peaks of the Weihe River;the big anomaly of ground tilt observed from Hancheng station in 1977 had relation to the level of the Yellow River;the anomaly of ground tilt observed from Ankang station in 1983 was due to the big flood in Ankang area in that time;the two big anomalies of groundwater level of Sanyuan well had relation to water storage of Fengcun reservoir.
Some special aseismic precursory anomalies obtained from Shaanxi precursory network are presented.Analysing the cause of these anomalies,following views are got:the two anomalies of groundwater level of Shuangwang well,Weinan in 1986 and 1996 may be caused by the flood peaks of the Weihe River;the big anomaly of ground tilt observed from Hancheng station in 1977 had relation to the level of the Yellow River;the anomaly of ground tilt observed from Ankang station in 1983 was due to the big flood in Ankang area in that time;the two big anomalies of groundwater level of Sanyuan well had relation to water storage of Fengcun reservoir.
引文
[1] 张义民.双王井水位的渭河水体荷载效应及其机理分析[ J] .地震,1993 ,(3) :77 ～80 .
[2] 易学发,姜家兰,王振武,陈光辉,等.冯村水库引起的小震群活动[ J] .地震,1998 ,(3) :14 ～18 .
[3] 张鸿福,张惠玲.安康台地倾斜特征及一次震兆记录[ J] .内陆地震,1998 ,2(2) :212 ～214 .
[2] 易学发,姜家兰,王振武,陈光辉,等.冯村水库引起的小震群活动[ J] .地震,1998 ,(3) :14 ～18 .
[3] 张鸿福,张惠玲.安康台地倾斜特征及一次震兆记录[ J] .内陆地震,1998 ,2(2) :212 ～214 .
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