Abstract: Statistic analysis about time and space grouping features of earthquakes with M≥ 5 occur red in China's continent since 1971 have been made. It has showed that from 1997 to 2001, the proportion of time and space grouping number of earthquakes with M≥5 occurred in our continent is relatively high. In space distribution, time and space grouping of earthquakes with M≥ 5 occurred to west of 105°in our continent after 1997 is relatively better. The results of the above-mentioned analysis are helpful to the medium-and short-term prediction on earthquakes with M≥ 5 in western part of our country.

Key words: Grouping activity, Statistical analysis, Time and space distribution, China′s continent