Abstract: Based on the distribution characteristics of active tectonics, we divided the Capital zone into three areas:west, middle and east. Using goodness-of-fit test method, we calcaulated the minimum magnitude of completeness for each area, and studied their temporal variations. Based on the temporal variation characteristics of the minimum magnitude of completeness, we temporally divided each area into three periods and studied their spatial distribution characteristic. The results showed that each area's minimum magnitude of completeness has apparent spatial difference among the periods and went to be stable after 2000, and that M_C could controlled below M_L2.0.

Key words: Minimum magnitude of completeness, Goodness-of-fit test method, Capital zone