冕宁跨断层短水准异常核实及分析  

VERIFICATION AND ANALYSIS OF CROSS FAULTS SHORT LEVEL ANOMALIES IN MIANNING

作　　者：马伶俐[1] 苏琴[1] 李菲菲[1] 高丽君 白云波 MA Ling-li;SU Qin;LI Fei-fei;GAO Li-jun;BAI Yun-bo(Survey Engineering Institute of Sichuan Earthquake Agency,Yaan 625000,Sichuan,China)

机构地区：[1]四川省地震局测绘工程院

出　　处：《内陆地震》2019年第3期249-260,共12页Inland Earthquake

基　　金：星火计划“川滇地壳形变特征及在强震中短期预测中的应用研究”项目(XH15037SX);四川省地震局科技专项——冕宁跨断层短水准异常跟踪分析(LY1709)

摘　　要：冕宁跨断层短水准场地2016年7月15日观测曲线出现幅度为5.63 mm的下降变化,异常持续发展至2017年1月已累计下降16.80 mm。针对此巨幅异常,本文中从仪器工作状态、周边环境、观测场地标志稳定性、人为影响、气象因素等方面分析异常可靠性。结果表明,异常属实、异常变化并非1号点单点变化,属于1-1C测段区域变形,西康温泉的出水时间与异常开始时间有关联。综合上述分析认为,观测资料真实可靠,异常属实,可能与西康温泉取水有一定关系,但尚不能排除构造成因。On July 15th,2016,the observation curve of Mianning cross-fault short leveling site showed a decrease of 5.63 mm,and the anomalous sustained development had dropped by 16.80 mm until January 2017.Aiming at this huge anomaly,this paper analyzed anomaly reliability from the instrument working state,the surrounding environment,the stability of observation site signs,the artificial influence and meteorological factors.The results showed that the anomaly was reliable and not a single point change at point No.1.It belonged to the regional deformation of the 1-1C measuring section.The time of Xikang hot spring outflow was related to the time of anomaly onset.Based on the above analysis,it was believed that the observation data were reliable and abnormal,which may be related to the water intake from Xikang hot spring,but the tectonic origin can not be ruled out.

关 键 词：跨断层 短水准 异常核实 

分 类 号：P315.7[天文地球—地震学]