Rapid Prediction of Strong Ground Motions from Major Earthquakes: An Example in the Wudu Basin, Sichuan, China

Author:

Zhang Xiaolong1ORCID,Peng Xiaobo2,Chen Shaolin3,Li Xiaojun4ORCID,Dou Zhan5,He Xiangli1ORCID,Xu Chong1

Affiliation:

1. National Institute of Natural Hazards (NINH), Ministry of Emergency Management of China (MEMC), Beijing, China

2. Jiangsu Earthquake Agency, Nanjing, Jiangsu, China

3. Department of Civil Engineering, College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, China

4. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing China

5. Department of Safety Engineering, College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing, China

Abstract

ABSTRACT Rapid prediction of ground motions of major earthquakes can assist emergency response and postseismic damage assessment. Numerical simulations can perform such prediction. However, they need a large number of calculations based on real data and depend on large-scale computation resources, limiting practice of real-time prediction. To solve this problem, this article proposes a new prediction method based on a 3D transfer function, which is obtained by solving the site seismic response to three impulse function excitations that can be calculated by different pre-event 3D physics-based numerical simulations. This approach only needs one seismic record in the study area and can quickly (near-real time) predict ground motions in the whole study area. We verify the proposed approach with an Mw 5.7 aftershock of the 2008 Mw 7.9 Wenchuan earthquake in the Wudu basin, Sichuan Province, China. The results show that this method is feasible and has sufficient accuracy in nearly real-time prediction of seismic ground motions.

Publisher

Seismological Society of America (SSA)

Subject

Geochemistry and Petrology,Geophysics

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