本文提出一种利用位移资料估计古地震 (史前地震 )震级的方法。现在估计古地震震级通常是根据地表破裂长度与矩震级的关系 ,需要确定同震地表破裂的总长度或者断层分段模型。但地表破裂总长度很少能够准确地测量 ,断层分段模型则有很大的不确定性而不可定量化。虽然在表示历史 This paper presents a method of estimating the magnitude of paleo-earthquakes (prehistoric earthquakes) using displacement data. Now it is necessary to estimate the total magnitude of the coseismic surface rupture or the fault segmentation model according to the relationship between the rupture length of the earthquakes and moment magnitude. However, the total length of the surface rupture can rarely be measured accurately, and the fault segmentation model has great uncertainty and can not be quantified. Although in expressing history