Abstract Using the observation data from 10 North-South seismic belt hole strain stations, based on wavelet decomposition and norm calculation, we acquire anomaly information from the Minxian-Zhangxian earthquake M6.6 (Jul.22,2013). The results show, in addition to Sunan station, the rest of the 9 stations present anomaly information before the earthquake. The earliest anomalies occur in early Jun 2013 (about 50 days before the earthquake); at Dangchang station, which is nearest to the epicenter, anomalies occur in early July 2013. Combined with other research results, the characteristics of abnormal information are discussed. We believe that there is a close relationship between it and the movement of eastern side from south to north in South- North seismic belt. The deformation transfer process after the earthquake is a reverse direction process. In addition, it is proved that the method is simple, effective and reliable to extract the deformation anomaly before the earthquake.
XU Kangsheng,ZENG Wenhao. The Characteristics of Deformation Norm Changes before and after the Minxian-Zhangxian M6.6 Earthquake[J]. jgg, 2017, 37(9): 884-887.
XU Kangsheng,ZENG Wenhao. The Characteristics of Deformation Norm Changes before and after the Minxian-Zhangxian M6.6 Earthquake[J]. jgg, 2017, 37(9): 884-887.