Abstract Based on the precursory observation data of geophysical field in the seismogenic zone and its adjacent area before and after the Jinggu M6.6 earthquake, the characteristics of spatio-temporal evolution and sub-instability of anomalies before the earthquake are systematically analyzed. The results show that before the Jinggu earthquake, the anomalies in the middle period before the earthquake, especially in the short impending stage, caused by the change of the focal area, are prominent. The anomalies exhibit periodic and quasi synchronous changes, overlapping in the time domain. In terms of spatial distribution, they are mainly concentrated in the range of 0-100 km and 200-300 km, showing a certain of group characteristics, and the anomaly stations are mainly concentrated in southwestern Yunnan to western Yunnan.
LI Huiling,GAO Yunfeng,ZHANG Shuliang et al. Evolution Characteristics of Precursory Anomalies of the Jinggu M6.6 Earthquake in 2014[J]. jgg, 2023, 43(增1): 95-101.
LI Huiling,GAO Yunfeng,ZHANG Shuliang et al. Evolution Characteristics of Precursory Anomalies of the Jinggu M6.6 Earthquake in 2014[J]. jgg, 2023, 43(增1): 95-101.