Rapid estimation of disaster losses for the M6.8 Luding earthquake on September 5, 2022

Wang, Wenqiang; Li, Yilong; Zhang, Zhenguo; Xin, Danhua; He, Zhongqiu; Zhang, Wei; Chen, Xiaofei

doi:10.1007/s11430-022-1078-6

Sci. China Earth Sci.

2023

DOI: 10.1007/s11430-022-1078-6

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Rapid estimation of disaster losses for the M6.8 Luding earthquake on September 5, 2022

Wenqiang Wang,

Yilong Li,

Zhenguo Zhang

et al.

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Cited by 5 publications

References 38 publications

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A Physics-Based Seismic Risk Assessment of the Qujiang Fault: From Dynamic Rupture to Disaster Estimation

Li,

Wang,

Zhang

et al. 2024

Int J Disaster Risk Sci

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This study achieved the construction of earthquake disaster scenarios based on physics-based methods—from fault dynamic rupture to seismic wave propagation—and then population and economic loss estimations. The physics-based dynamic rupture and strong ground motion simulations can fully consider the three-dimensional complexity of physical parameters such as fault geometry, stress field, rock properties, and terrain. Quantitative analysis of multiple seismic disaster scenarios along the Qujiang Fault in western Yunnan Province in southwestern China based on different nucleation locations was achieved. The results indicate that the northwestern segment of the Qujiang Fault is expected to experience significantly higher levels of damage compared to the southeastern segment. Additionally, there are significant variations in human losses, even though the economic losses are similar across different scenarios. Dali Bai Autonomous Prefecture, Chuxiong Yi Autonomous Prefecture, Yuxi City, Honghe Hani and Yi Autonomous Prefecture, and Wenshan Zhuang and Miao Autonomous Prefecture were identified as at medium to high seismic risks, with Yuxi and Honghe being particularly vulnerable. Implementing targeted earthquake prevention measures in Yuxi and Honghe will significantly mitigate the potential risks posed by the Qujiang Fault. Notably, although the fault is within Yuxi, Honghe is likely to suffer the most severe damage. These findings emphasize the importance of considering rupture directivity and its influence on ground motion distribution when assessing seismic risk.

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A Physics-Based Seismic Risk Assessment of the Qujiang Fault: From Dynamic Rupture to Disaster Estimation

Li,

Wang,

Zhang

et al. 2024

Int J Disaster Risk Sci

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Developing a rapid assessment framework for China earthquake disaster losses: insights from physical simulations of the Yangbi earthquake

Li,

Zhang,

Chen

2024

npj Nat. Hazards

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Earthquakes remain unpredictable and pose significant challenges to disaster preparedness. This study develops a rapid assessment framework for earthquake disaster losses based on physical simulations, demonstrated through analysis of the 2021 Ms 6.4 Yangbi earthquake. A finite fault source based on observed data is employed on a GPU-accelerated 3D strong ground motion simulation platform. The computational process considers the effects of 3D heterogeneous velocity structure and terrain. Subsequently, this data is incorporated into a mathematical model for earthquake disaster loss assessment derived from historical statistics, evaluating emergency response levels, fatalities, and economic losses. The inclusion of teleseismic data into this framework underscores its extensive applicability for rapid loss assessments, even in regions lacking local seismic data. Through comparisons with station observation waveforms and government-reported loss, the validity and practicality of the framework were substantiated. It plays a vital role in assisting emergency decisions, optimizing resource allocation, and further mitigating losses.

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Numerical simulation of 3-D seismic wave based on alternative flux finite-difference WENO scheme

Xu,

Zhang

2024

Geophysical Journal International

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Summary High-frequency non-physical oscillations may occur due to shock waves in seismic wavefield and dynamic rupture simulation. In this study, we introduced the alternative flux finite-difference weighted essentially non-oscillatory (AWENO) scheme to address potential shock wave issues in computational seismology effectively. The wavefield of the body-fitted curvilinear domain was accurately computed through conservative grid mapping, ensuring accurate implementation of free surface boundary conditions on irregular surfaces using characteristic boundary conditions and minimizing artificial boundary reflections with exponential decay absorbing layers. Finally, we compared our scheme with the GRTM for flat surfaces and the CGFDM3D-EQR for irregular surfaces to demonstrate its correctness and accuracy, and validated its non-oscillatory characteristics. The aforementioned scheme is anticipated to assume a significant function in simulating more intricate seismic wavefields or dynamic ruptures.

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Rapid estimation of disaster losses for the M6.8 Luding earthquake on September 5, 2022

Cited by 5 publications

References 38 publications

A Physics-Based Seismic Risk Assessment of the Qujiang Fault: From Dynamic Rupture to Disaster Estimation

A Physics-Based Seismic Risk Assessment of the Qujiang Fault: From Dynamic Rupture to Disaster Estimation

Developing a rapid assessment framework for China earthquake disaster losses: insights from physical simulations of the Yangbi earthquake

Numerical simulation of 3-D seismic wave based on alternative flux finite-difference WENO scheme

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