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本文对安徽省五个台站八套水管倾斜仪的长期观测资料(最短的为2.6年,最长的为8年)进行了分析,认为观测结果显示出如下事实: (1)观测条件具有较小的噪声水平; (2)正常背景(无震或小震背景)下的地倾斜态式; (3)台站部位现今的地壳垂直运动是不明显的,倾斜速率小于0″.5/年; (4)在[1]中所讨论过的佛子岭台站5公里处1979年夏季820余次小震震群活动前的前兆倾斜变化,随着资料的进一步积累而更加醒目。
This paper analyzes the long-term observation data (the shortest of 2.6 years and the longest of 8 years) of eight sets of water pipe tilt meters at five stations in Anhui Province. It is concluded that the observations show the following facts: (1) Small noise level; (2) Earth tilt under normal background (no earthquake or small earthquake background); (3) vertical crustal movement is not obvious at the station site with a tilt rate less than 0 ".5 / year ; (4) The change in precursory inclination before the earthquake swarm activities of more than 820 minor earthquakes in the summer of 1979 at 5 km from the Foziling Station, discussed in [1], became more conspicuous as the data further accumulated.