Abstract Based on geological survey data from the central urban area of Ji’nan, we calculate the Coulomb failure stress change (ΔCFS) induced by historical strong earthquakes in the north China region and investigate the influence on each fault in the Ji’nan area. The results show that the ΔCFS on the Miaolang-Jiaobin fault increased up to 1.1 kPa, which has the maximal impact. The stress on the northern section of Woniushan fault and Ji’nan-Sungeng fault increased up to 0.8 kPa and 0.6 kPa respectively. The activity of these faults may be slightly enhanced, but the stress changes are far below the seismic trigger threshold (10 kPa). The stress has only weak and negligible change in the west and east part of Qihe-Guangrao fault, and the impact is minimal. Comprehensive analysis reveals that due to the fact that the epicenter of historical strong earthquakes in north China is far from the study area, the impact on the main faults in this area is limited.
DONG Peiyu,REN Tianxiang,WANG Zhihui. Numerical Study of the Impact on Fault Activity in Ji’nan Prior Zone Caused by Historical Strong Earthquakes in North China[J]. jgg, 2020, 40(10): 1055-1061.
DONG Peiyu,REN Tianxiang,WANG Zhihui. Numerical Study of the Impact on Fault Activity in Ji’nan Prior Zone Caused by Historical Strong Earthquakes in North China[J]. jgg, 2020, 40(10): 1055-1061.