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Are short-term evacuations warranted? Case of the 2009 L'Aquila earthquake

机译:是否需要短期疏散? 2009年拉奎拉地震案

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摘要

The disastrous earthquake in L'Aquila Italy (Mw 6.3, 6 April 2009) again highlights the issue of potentially reducing seismic risk by releasing warnings or initiating mitigation actions. Earthquakes cluster strongly in space and time, leading to periods of increased seismic hazard. During such seismic crises, seismologists typically convey their knowledge of earthquake clustering based on past experience, basic statistics and “gut feeling.” However, this information is often not quantitative nor reproducible and difficult for decision-makers to digest. We define a novel interdisciplinary approach that combines probabilistic seismic hazard and risk assessment with cost-benefit analysis to allow objective risk-based decision-making. Our analysis demonstrates that evacuation as mitigation action is rarely cost-effective. Future mitigation strategies should target the weakest buildings and those on the poorest soil.
机译:意大利拉奎拉(L'Aquila)发生的灾难性地震(2009年4月6日,第6.3版)再次凸显了通过发布警告或采取缓解措施来降低地震风险的潜在问题。地震在时间和空间上强烈聚集,导致地震危险性增加。在此类地震危机中,地震学家通常会根据过去的经验,基本统计数据和“直觉”来传达他们对地震聚类的知识。但是,这些信息通常不是定量的,也不是可复制的,决策者很难消化。我们定义了一种新颖的跨学科方法,该方法将概率地震危险性和风险评估与成本效益分析相结合,从而可以进行基于风险的客观决策。我们的分析表明,疏散作为缓解措施很少具有成本效益。未来的缓解策略应针对最薄弱的建筑物和最贫穷的土壤上的建筑物。

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