天津两井水位同震效应分析

从不同的方位对天津地区两口地震观测专用井记录到的国外7级、国内6级以上的地震进行分析。两口井所处的地理位置、地质结构、井深及其含水层岩性不同，对同一地震的表现形式也不尽相同。通过对比分析，得到井水位对地震的响应特点及几点认识：观测井孔一般对远场大震记录比较灵敏，而对近震及地方震反映不灵敏；井孔水位仪记录的水位波幅与震级、震中距有关；井孔同震效应的能力和井孔对固体潮的反映能力不一致。

Analysis on Coseismic Effect of Water Level in Two Wells of Tianjin

Coseismic groundwater level changes of strong earthquakes （with Ms≥6 in china and Ms≥7 out of china） recorded in two wells of Tianjin are studied from different angles. Because of the different geographical position, geological structure, depth and aquifer rock, coseismic groundwater level changes of the same earthquake in the two wells are different. The result indicates that groundwater level is sensitive to distant earthquakes and not to near earthquakes and local earthquakes. The amplitude of coseismic groundwater level wave is related to magnitude and epicentral distance of the earthquake. The well＇ Ability for coseismic effects and for earth tide is different.