Abstract
In this paper, the authors present some results of earthquake hazard assessment for Đà River ladder of hydropower plants according to probabilistic and neo-deterministic I approaches. The results have shown that: According to the probabilistic approach, Tuan Giáo district, Điện Biên province, has the largest ground accelerations with respect to the following periods: 50 years (84 cm/s2); 100 years (114 cm/s2), 200 years (150cm/s2), 500 years (195 cm/s2), and 10,000 years (395 cm/s2); In the meantime, the neo-deterministic approach for earthquake hazard prediction has shown that the Tuần Giáo area has the maximum horizontal ground displacement (Dmax) equal to 21-23 maximum horizontal velocity (Vmax) in the range of 22-25 cm/s and maximum grounti motion (Amax) ranging from 200-250 cm/s2. In the case of missing observation earthquake data, the combination of both probabilistic and neo-deterministic approacl allows us to improve the efficiency of earthquake hazard assessment and prediction 11the Đà River Ladder of hydropower plants.