Abstract：We use the cross-fault deformation measurement data of Tan-Lu fault zone in Anhui section and “Huoshan seismic window”, and calculate each line observation data for nearly 20 years utilizing the method of fault deformation accumulation rate and annual sliding velocity ratio. We analyze the fault activity, energy accumulation, and evolution characteristics of whole space in the study area, comb the various points across the fault deformation characteristics of the fault zone and the change process, and discuss the relation between fault activity and moderate earthquakes in Anhui province and adjacent areas from the angle of space distribution to the time evolution characteristics. Our results show that: 1) The cumulative rate of fault deformation in the Anhui section of the Tan-Lu fault zone is higher than that of the “Huoshan seismic window”. Before the earthquake, there are high-value clusters, regional boundaries, high-density low-value gradient zones, etc., showing the background of stress accumulation before the earthquake. 2) The fault activity in Anhui area is obviously affected by the overall activity of the Tanlu fault zone, and the regional and periodic changes are significant. (3) The annual slip rate of fault deformation has a certain indication effect on the judgment of earthquake activity, mainly as before the earthquake. The characteristics of high-value anomalies of 2 months to 1 year, and group anomalies of multiple points, increase with increased magnitude.
CAO Zhilei,ZHOU Qiong,GE Jihua et al. Fault Activity and Correlation Study of Tan-Lu Fault Zone and “Huoshan Seismic Window”[J]. jgg, 2019, 39(7): 681-685.
