Analysis of Earthquake Monitoring Capability of Level Cross-fault Sites in Fujian and Jiangxi

This paper has a research basis on the leveling data of 5 years from 2008 to 2012 in cross-fault grounds of Fujian and Jiangxi province, by means of establishing three-dimensional finite element model to calculate the level of observed changes across the fault when the fault dip angle and the fault strike are not at the same time, and with five earthquake instances in Fujian and Jiangxi and the surrounding area from 2008 to 2012 to verify the reliability of its models. Then this paper integrated finite element model and the conclusion of five earthquakes to conduct a preliminary evaluation grading of 24 level observation areas in Fujian and Jiangxi. The results show that Fujian and Jiangxi cross-fault monitoring system has a strong level of seismic monitoring capability, when judging fault changes, it requires a combination of different ground level changes. At the same time, the factors influencing the monitoring ability of cross-fault level site are mainly fault dip Angle and the fault strike, especially when the dip Angle of fault is at 30° to 80° and the fault strike and horizontal ground are vertical, the reflecting ability of earthquake is the strongest.