朝阳桃花吐短水准异常资料分析

Analysis of Short Leveling Anomalies in Taohuatu Chaoyang

自1995年以来,朝阳桃花吐短水准观测已经持续20多年,从数据的日变化曲线可以明显发现2018年12月开始,1-3测段陆续出现加速上升变化,与钻孔水位持续下降同步,截止到2019年7月4日,短水准上升幅度变化1.244mm。本文通过仪器标定检查、原始曲线分析、数字滤波周期分析及与其他仪器对比分析、与地震活动性相结合等方法,综合分析结果表明,目前观测异常变化是趋势性异常背景下的短期变化,进一步说明辽西地区地震危险性增强,并据此提出后续处理意见。

Since 1995,the observation of short leveling in Chaoyang Taohuatu has lasted for more than20 years.From the daily change curve of the data,it can be clearly found that there have been accelerating changes on 1-3 segment from December 2018.And synchronous with continuous drop of water level in the borehole.The rising range of short leveling has changed by 1.244 mm as of July4,2019.In this paper,through instrument calibration check,original curve analysis,period analysis of digital filter,and use the methods such as comparative analysis with other instruments,combination with seismicity.The comprehensive analysis results show that the current observed abnormal changes are shortterm changes under the background of trend anomalies.It further shows that the seismic risk in the west of Liaoning Province is increased.Then based on this,the following handling suggestions are put forward.