芜湖皖28井水位异常综合分析
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摘要
针对2011年芜湖皖28井水位破年变异常,系统梳理该井相关资料,利用水位变幅、相关性分析及相对变差率进行分析。结果表明,该项异常信度较高,反映区域构造活动信息,是周边几次中等强度地震的共同前兆。通过剩余曲线、从属函数等数学方法,对该井历年水位观测数据进行异常识别。研究表明,该井水位异常主要表现为短期异常特征,与该井孔西北、西南侧中等地震有较好的对应关系。
For understanding the anomaly of weter level which is breaking though the annual variance at Wuhu No.28 well in Anhui Province in 2011,the relevant information about the well is reviewed.The correlation analysis on amplitude variance of water level and relative variation ratio shows that the abnormal is higher reliability,which reflects the regional tectonic activity information,and simultaneously,is a common precursor of several moderate earthquakes in its surrounding area.Subsequently,through the mathematical method of residual curve and subordinate function,the abnormities of water level in the observation data at this well over years are recognized.Our research shows that the water level anomalies are mainly of shortterm anomalies and there is a good corresponding relationship with the medium earthquakes surrounding the borehole in the northwest and southwest side.
For understanding the anomaly of weter level which is breaking though the annual variance at Wuhu No.28 well in Anhui Province in 2011,the relevant information about the well is reviewed.The correlation analysis on amplitude variance of water level and relative variation ratio shows that the abnormal is higher reliability,which reflects the regional tectonic activity information,and simultaneously,is a common precursor of several moderate earthquakes in its surrounding area.Subsequently,through the mathematical method of residual curve and subordinate function,the abnormities of water level in the observation data at this well over years are recognized.Our research shows that the water level anomalies are mainly of shortterm anomalies and there is a good corresponding relationship with the medium earthquakes surrounding the borehole in the northwest and southwest side.
引文
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车用太、鱼金子.地震地下流体学[M].北京:气象出版社,2006.
范雪芳,刘耀伟,吴桂娥,等.华北地区水位、水氡中短期异常特征研究[J].地震研究,2010,33(2):147-158.
国家地震局监测预报司.地下流体地震预报方法[M].北京:地震出版社,1997.
陆明勇,李志雄,等.强地震前地下流体趋势异常的再探讨[J].国际地震动态,2013,10:21-23.
武晓东,王志惠,朱石军,等.延庆五里营动水位异常变化分析[J].地震地磁观测与研究,2012,33(5/6):165-168.
王燕,杨兴悦,等.甘肃模拟水位资料处理方法研究及映震效能评估[J].地震研究,2013,36(1):24-33.
杨兴悦,王燕,等.武山22号井水氡中期异常与地震关系的探讨[J].西北地震学报,2006,28(4):379-380.
张国民,傅征祥,桂燮泰,等.地震预报引论[M].北京:科学出版社,2001.
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