Abstract: Taking earthquakes above M_S5.0 in southeast China, above M_S5.5 in north China and above M_S7.0 in the west of in mainland China since 1970 as research object, this paper selects 8 kinds of seismological indexes with clear physical meaning and strong independence for whole time-space abnormal scanning. By changing sampling conditions of time scale, spatial slip and strength interval, we analysed the influence on seismological index time course calculation results, and disscused the influence of spatial scanning slip direction compared with changes of regional main stress direction on the calculation results, the results show that change of spatial parameters had the most influential effect for scaning results, and the minimum influential spatial scope and the optimum condition parameter of time-space scanning are given for scanning different magnitude seismology indexes.

Key words: Seismology index, Time course, Abnormal scan