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利用乌什台数字化前兆形变观测资料,分析乌什MS 4.5级地震前乌什台水管倾斜仪、洞体应变仪数据变化情况。通过对比分析发现:地震前,洞体应变仪北南分量数据曲线正常,东西分量数据曲线加速拉张,05:14—20:32拉张幅度达到7.40×10~(-7),7月19日5时至20日16时乌什洞体应变仪东西分量快速拉张了9.20×10~(-7);7月19日5—19时,水管倾斜仪北南分量数据曲线正常,东西分量数据曲线反向西倾7.13ms,且05:59—06:06、07:36—07:46、18:42—18:56数据掉格,水管倾斜仪异常结束后1小时,在洞体应变仪异常过程中发生了乌什MS 4.5级地震。水管仪东西分量震前反向西倾,洞体应变仪东西分量震前拉张加速,短临异常明显,且2套形变观测震前异常时间同步性较好。
Using the Wushitian digital precursory deformation observation data, the changes of Wushu MS6 before the Wushi MS 4.5 earthquake were analyzed. Through the comparative analysis, it is found that before the earthquake, the data curve of the north component of the strain gauge in the hole body is normal and the curve of east-west component data is accelerated. The stretch amplitude of 05:14 to 20:32 reaches 7.40 × 10 ~ (-7), July 19 Day 5:00 to 20:00 on the 20th Wushi Dongshi body strain component quickly pulled 9.20 × 10 ~ (- 7); July 19 5-19, the northwest component of the pipe tilt meter data normal curve, east-west component Data curve reverse westward tilt 7.13ms, and 05: 59-06: 06,07: 36-07: 46,18: 42-18: 56 data off, 1 hour after the water pipe inclinometer abnormal end, in the hole strain The Wush MS 4.5 Earthquake occurred during the anomaly of the instrument. The east-west component of the water pipe was reversed westward before the earthquake, and the east-west component of the strain gauge of the aquifer expanded and accelerated shortly before the earthquake, and the anomalous time synchronization of the two sets of deformation observation was better.