【摘要】 1991年2月25日在我台西南方向94km的柯坪县境发生了6.5级地震。震前,我台两套正式观测的倾斜仪和两套临时安装的倾斜仪均观测到了较明显的临震异常。本文仅就其临震异常对比观测资料进行分析和讨论。更多还原

【Abstract】 On Feb . 25,1991,a quake of magnitude 6. 5 took place in Keping county ,with its epicentre 94km away from and in the southwest of the Wushi station. The obvious anomalies has been captured immediately before the quake by the four sets of ground tiltmeters ,in which one pair for ordinary observations and another two for temporary use . The author tried to make a comparative analysis on these remarkable abnormal data recorded by the two pairs of the tiltmeters, and discuss its impending abnormal features of the shock.更多还原