Authors

Nguyen Hong Phuong 1,2* , Vo Thi Hong Quyen 3 , Pham The Truyen 1,2* , Do Van Linh 4 , Vu Trong Tan 4 , Nguyen Trong Hieu 1

Affiliations

1 Institute of Geophysics, Vietnam Academy of Science and Technology, 8 Hoang Quoc Viet Street, Nghia Do, Cau Giay District, Ha Noi; phuong.dongdat@gmail.com; truyentpt@igp.vast.vn; nguyenhieu200993@gmail.com

2 Graduate University of Science and Technology, Vietnam Academy of Science and Technology; phuong.dongdat@gmail.com; truyentpt@igp.vast.vn

3 Ho Chi Minh City Institute of Resource Geography, 01 Mac Dinh Chi Street, Ben Nghe Ward, District 1, Ho Chi Minh City; vthquyen@hcmig.vast.vn

4 South Vietnam Geological Mapping Division, 200 Ly Chinh Thang, Ward 9, District 3, Ho Chi Minh City; dovalinh@gmail.com; vutrongtan@gmail.com

*Corresponding author: phuong.dongdat@gmail.com; truyentpt@igp.vast.vn

Abstracts

This paper presents the probabilistic seismic hazard assessment (PSHA) results for Da Nang city.  A regional earthquake catalog was updated until 2021 and comprehensive seismic source zones within 150 km of Da Nang city were used. The PSHA results for Da Nang city are presented in the form of probabilistic seismic hazard maps, depicting peak horizontal ground acceleration (PGA) with 10%, 5%, 2% and 0,5% probability of exceedance in 50 years, corresponding to return times of 475; 975; 2,475 and 9,975 years, respectively, as well as the 5–hertz (0.2 s period) and 1–hertz (1.0 s period) spectral accelerations (SA) maps with 5–percent damping on a uniform firm rock site condition, with 2% probability of exceedance in 50 years, corresponding to a 2,475 year return period. The results show that, for the whole territory of Da Nang city, for all four return periods, the predicted PGA values correspond to the intensity of VI to VIII degrees according to the MSK–64 scales. As for the SA maps, for the 2,475–year return period, the predicted SA values at 1.0 s period correspond to the intensity of VI, while the predicted SA values at 0.2 s period correspond to the intensity of VIII to IX according to the MSK–64 scales. These probabilistic seismic hazard maps present short–and long–term forecasts of seismic hazards for Danang city.

Keywords

Probabilistic seismic hazard maps; Peak Ground Acceleration; Spectral acceleration; Seismic source zones; Ground motion prediction equations

Cite this paper

Phuong, N.H.; Quyen, V.T.H.; Truyen, P.T.; Linh, D.V.; Tan, V.T.; Hieu, N.T. Probabilistic seismic hazard assessment for Da Nang city, Vietnam. VN J. Hydrometeorol. 2022, 13, 64-81. 

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