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１９３３ 年叠溪７５ 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。
The 1933 Diexi 7.5-magnitude earthquake was a major event that took place on the eastern edge of the Qinghai-Tibet Plateau in this century. For the earthquake, different departments have conducted inspections, but there is a clear disagreement on the isosurf line chart. This difference means that there is a difference in the understanding of the seismogenic structure of the earthquake. Based on the characteristics of the earthquake damage, the location of the epicenter, the geotectonic environment of the epicenter area and the seismogenic structure, this paper considers that the active fault in the north-south direction may be the seismogenic structure of the earthquake and the active fault may be the Minjiang River Southern extension of the fault.