Damage Mechanism of Yiliang Earthquake on September 7, 2012

According to the analysis of the structure, topography, earthquake sequence, and earthquake hazards in September 2012 earthquake of Yiliang County, Yunnan Province, the mechanism of the earthquake damage is given. The low-cycle fatigue, shallow source, topography, population density, seismic capacity of the structure and seismic awareness of the residents is the main damage factor. This research provides a reference to the seismic design of analogous regions.