荣昌华江井水温震后特异变化分析

Specific water temperature changes after earthquake presented by Huajiang well in Rongchang County

重庆市荣昌华江井水温在2008年5月汶川M 8.0地震、2010年4月玉树M 7.1地震、2010年9月荣昌M 4.7地震和2011年3月日本东海M 9.0地震时均有同震上升型响应与震后持续高值异常变化。其中在汶川地震与荣昌地震震后6—72小时,记录到叠加在高值上的群集型正脉冲特异变化。变化持续53—109天,最大脉冲幅度0.038℃,为正常日变化幅度0.005 5℃的7倍。初步研究结果表明,这种特殊的水温微动态现象,是在特定地质条件下,区域性强震与当地中等地震活动激发深层气体释放并侵入观测井引起。

Both ascendant rcoseismic responses and high value changes after main-shock are recorded by the specific water temperature changes of Huajiang well in Rongchang, Chongqing during Wenchuan MS 8.0 earthquake in May, 2008, Yushu MS 7.1 earthquake in April, 2010, Rongchang MS 4.7 earthquake in Sep., 2010 and Japan MS 9.0 earthquake in March, 2011. Among them, after 6 to 72 hours of Wenchuan earthquake and Rangchang earthquake, specific changes of cluster type positive pulse stacked on high value were also recorded. The duration of changes is 53 to 109 days,and maximal amplitude of pulse is 0.038 ℃, about 7 times of the normal amplitude, 0.000 55 ℃, of daily changes. The preliminary results indicate that these new micro dynamic of water temperature is probably caused by releasing of deep gas stimulated by seismic activity and invading into the observation well under certain geological conditions.