关键词: 辽东半岛, 潜在震源区, 断层活动性

Abstract: Based on the data of the fault activity, this paper mainly deals with evaluation of seismic risk and determination of potential earthquake sources in the region of low-moderate earthquakes such as the Liaodong Peninsula, where any trace of paleoearthquake has never been found.Results from our investigations are as follows; 1)the M≥5 earthquakes in the study region had a close relation to the faults that were activ in late Pleistocene; 2) the active faults in the region can be classified into three types on the basis of their characterized motions by predominat stick-slip, creep and contemporaneous stick-slip with creep and the M=6 earthquakes the region had a close relation to the stickslip segments of the faults; and 3) the probable maximal magnitude of earthquakes along some faults were estimated from the length of the faults that were active in late Pleistocene and the maximal displacements along a few faults.

Key words: Liaodong Peninsula, Potential hypocentral area, Fault activity for determination