本文对二台断裂历年来所发现的古地震遗迹资料作了较全面系统的归纳与研究,根据剖面上岩性,韵律结构等特点和多种年代证据,提出二台断裂自全新世以来至少发生过8次大地震(含富蕴1931年8级地震),复现间隔为250—2000年之间,认为该断裂大震重复发生的时间间隔是不均匀的。估计今后百年内发生8级地震的危险性极小。 Based on the characteristics of lithology and rhythm structure in the section and evidences of various ages, it is suggested that at least two faults have occurred since the Holocene After eight major earthquakes (including Richter 8 magnitude earthquake in 1931), the intervals between recurrences were between 250 and 2000, and the intervals at which the major earthquakes occurred repeatedly were considered to be uneven. It is estimated that the magnitude of the M8 earthquake in the next 100 years is extremely dangerous.