The magnitude of the largest possible earthquake in the Muong La - Bac Yen fault zone

Bùi Văn Duẩn, Nguyễn Công Thăng, Nguyễn Văn Vượng, Phạm Đình Nguyên

Abstract


This paper presents estimation result of the magnitude of the largest possible earthquake in the Muong La - Bac Yen fault zone, a seismic-source zone located in the Northwest of Vietnam. After investigating and analysing terrain, geomorphology, geological features, satellite and Shuttle Radar Topography Mission images and related earthquake data, several geometric-geodynamic characteristics of the Muong La - Bac Yen fault zone in the Present had been elucidated. The estimation of the magnitude of the largest possible earthquake in the Muong La - Bac Yen fault zone was based on these results. The study finally shows that 1) the Muong La - Bac Yen fault zone has expressed to be an active one in Present and may generate earthquakes in future; 2) the magnitude of the largest possible earthquake in the Muong La - Bac Yen fault zone is Mmax = 5.9 ± 0.3, corresponding to an average return period of 450 years.

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DOI: https://doi.org/10.15625/0866-7187/35/1/3038 Display counter: Abstract : 71 views. PDF : 120 views.

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Vietnam Journal of Earth Sciences, ISSN: 0866-7187; 2615-9783

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