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Zheng Wenjun
Author NameAffiliation
Zheng Wenjun Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China
Lanzhou Base of Institute of Earthquake Science, China Earthquake Administration, Lanzhou 730000, China
State Key Laboratory of Earthquake Dynamics, Institute of Geology, CEA, Beijing 100029, China 
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基金项目:This research was sponsored by the sub-project entitled "Active Tectonic Framework and Assessment of Tendency of Seismic Risk in the Key Earthquake Risk Regions in Gansu,Sichuan and Qinghai Provinces" under the "Special project of emergent intensive obser
Textual Research on the Historical Data of the 1573 AD Minxian Earthquake in Gansu Province and Discussion on Its Seismogenic Structure
Zheng Wenjun1,2,3
1.Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China;2.Lanzhou Base of Institute of Earthquake Science, China Earthquake Administration, Lanzhou 730000, China;3.State Key Laboratory of Earthquake Dynamics, Institute of Geology, CEA, Beijing 100029, China
Abstract:
According to the detailed study of the historical earthquake records and causative structure of the Minxian M6(1/2) earthquake in 1573 {A.D.}, we have found that the most grievous disaster area lies nearby the Minxian county seat (Minzhou county at that time). So, we have identified the extremely seismic area of the 1573 {A.D.} The Minxian M6(1/2) earthquake was located in Minxian city, the intensity of the meizoseismal region is Ⅷ~Ⅸ, the epicenter is 34.4°N, 104.0°E, the location precision is Ⅱ and the deviation of location is less than or equal to 25km. Tectonically, this area lies in the transition region of stress transfer and structural transform between the east Kunlun fault and the northern margin of the west Qinling fault. The differential activity of the Lintan-Dangchang fault zone is obvious, and only parts of the segment put up Holocene activity. There are landslides and rock bursts of different sizes in the meizoseismal region. By integrated analysis, we conclude that the Minxian-Dangchang segment of the Lintan-Dangchang fault is the seismogenic structure of the 1573 A.D. M6(1/2) Minxian earthquake, in Gansu Province.
Key words:  Historical earthquake  Textual research  Seismogenic structure  Minxian