关于1933年叠溪7.5级地震若干问题的讨论

Discussion on some problems of Diexi earthquakewith magnitude 7 5 in 1933

１９３３ 年叠溪７５ 级地震是本世纪发生于青藏高原东缘的重大事件。对这次地震， 不同部门曾进行考察， 但给出的等烈度线图有着明显的分歧， 这一分歧意味着对该次地震发震构造认识的不同。本文基于对该次地震的震害特征、震中位置、震中区地质构造环境以及发震构造的讨论， 认为南北向的活动断裂有可能是该次地震的发震构造， 而该活动断裂可能是岷江断裂的南延。

Diexi earthquake( M 7 5) in 1933 was a great event occurred at the eastern border of Qingzang Platue in this century Field investigations were conducted by different units and isoseismic lines with obvious divergence indicating different opinion about the genetic tectonic of the event were obtained According to the discussion of the features of seismic disaster,the location of epicenter,the environment of geological structure at epicenter and the genetic structure of this eauthpuake,we inclined to consider that the north south trending active fault, which might be the south extending of Minjiang fault,is the most possible genntic fault of this event