Abstract:We collect the mobile leveling data of 6 sites along the Tan-Lu fault zone and “Huoshan seismic window” in Anhui area in recent 30 years, and process the data using the “deformation rate accumulative analysis” method. We study the relationship between anomaly period and surrounding earthquakes, and analyze the overall characteristics of deformation rate accumulation of all sites in the same period. The results show that: 1) The deformation rate accumulative analysis can effectively extract the data of more than 2 times the standard deviation of each survey line, and the trend changes with smaller rates can be suppressed. 2) The deformation rate accumulative analysis not only extracts the deformation rate, but also retains the transition change of original data to a certain extent, and the frequency of deformation rate accumulation in the curve transition period increases obviously. 3) The effect of reflecting earthquakes in the period of continuous deformation rate accumulation is better, but lacks one-to-one correspondence, so it needs to be analyzed in combination with the survey line. 4) The frequency of deformation rate accumulation of each survey line in the study area differs in each period, indicating that the fault activity has certain time-sharing characteristics, and the time-sharing activity has group characteristics on a whole. 5) When the deformation rate accumulation of cross-fault leveling data in this area changes intensively, the possibility of MS5.0 earthquake in east China will increase.
GE Jihua,SUN Jun,CAO Zhilei et al. Study on the Relationship between Cross-Fault Mobile Leveling and Regional Earthquakes in Anhui Province[J]. jgg, 2022, 42(4): 336-342.