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瓦屋山水电站位于川西台陷南端，南邻峨眉山断块，水库南缘的毛沟断裂最新活动时期为晚更新世，水库处于活动性大地构造环境中。该区属于名山—马边—昭通地震带北段，以弱震活动为主，伴有少量中强地震，目前正处于地震活动期。从分析库区地质构造、水文地质、工程地质、地震活动等条件，并使用水库综合影响系数法、贝叶斯概率预测法，断层强度分析法，判定库区存在着发生构造型水库诱发地震的可能性，诱发地震强度Ｍｓ≤５．５。划分了两个水库诱发地震危险区：①黄店子—张沟Ｍｓ＝５左右危险区；②穆沟—王村Ｍｓ≤４．０危险区。
The Wawushan Hydropower Station is located at the southern tip of the western Sichuan Trap and the Emeishan Fault Block in the south. The latest active period of the moat fault on the southern margin of the reservoir is late Pleistocene, and the reservoir is in an active tectonic setting. This area belongs to the northern part of the Miaoshan-Mabian-Zhaotong seismic belt, with weak earthquake activity as the main part, accompanied by a small amount of moderate-strong earthquakes, and is currently in the seismic activity period. Based on the analysis of the geological structure, hydrogeology, engineering geology and seismic activity in the reservoir area and using the comprehensive reservoir influence coefficient method, the Bayesian Probability prediction method and the fault strength analysis method, it is concluded that the induced reservoir-induced earthquake Possibility of inducing earthquake intensity Ms≤5.5. Division of the two reservoir induced earthquake danger zone: ① Huangdian - Zhanggou Ms = 5 or so dangerous areas; ② Mugou - Wangcun Ms ≤ 4.0 danger zone.