大地测量与地球动力学2017，Vol.37Issue(4)：425-428,4.DOI:10.14075/j.jgg.2017.04.021
地磁低点位移异常:岷县-漳县M6.6地震可能的震前反映
Abnormity of Geomagnitics Low-Point Shift: A Possible Seismogenic Reflection of the Minxian-Zhangxian M6.6 Earthquake
摘要
Abstract
In this paper,we use observation data for Tianshui geomagnetic station(TSY),Lanzhou geomagnetic station (LZH),Qianling geomagnetic station(QIX),and Chengdu geomagnetic station(CDP),based on multi-scale wavelet decomposition,extraction of time of low-point on vertical compenent,and variation process of low-point shift on time.The results show that the low-point shift continues to lag the vertical compenent on Tianshui geomagnetic station (TSY) from May to July 2013.The range of variation lies beyond the normal state,but other stations do not present this abnormal phenomenon.This process shows localized features at Tianshui station;the Minxian-Zhangxian 2013-07-22 M6.6 earthquake occurrence is on down-point time of low-point shift peak,showing the correlation between the anomaly and the earthquake.This may be a reflection of seismogenics in the geomagnetic field.These results have an important reference value in the study of the seismogenic process,mechanism dynamics process of geomagnetic low point shift,and exploration on earthquake prediction.关键词
地磁/低点位移/岷县-漳县地震/地震孕育Key words
geomagnetic field/low-point shift/Minxian-Zhangxian M6.6 earquake/seismogenic分类
天文与地球科学引用本文复制引用
许康生,曾文浩..地磁低点位移异常:岷县-漳县M6.6地震可能的震前反映[J].大地测量与地球动力学,2017,37(4):425-428,4.基金项目
National Natural Science Foundation of China,No.41474046.国家自然科学基金(41474046). （41474046）
