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引言 地震学家对井孔记录地震波这一现象的兴趣由来已久,Blanchard用浮子作为地震检波器,用地震仪滚筒作为记录器,对水位地震波动进行了最早的研究,他得到浮子位移与地面运动之间的比值可以表示为
Introduction Seismologists have long been interested in the phenomenon of wellbore seismic wave recording. Blanchard used a float as a geophone and a seismograph drum as a recorder, earliest studying seismic wave motion at the water level. The ratio between the movements can be expressed as