ABSTRACT On the 22nd of December 2018 the shorelines of Sunda Strait, Indonesia, were hit by tsunami waves generated by the flank collapse of the Anak Krakatau volcano. The authors conducted a field survey of the affected areas in both Sumatra and Java islands to collect information on tsunami inundation and run-up heights, damage patterns at each coastal community, and the evacuation behaviour and tsunami awareness of the affected people. The survey results showed that in Sumatra island inundation heights of more than 4 m were measured along the coastline that was situated to the north-north-east of Anak Krakatau, while less than 4 m were measured along the north-western direction. Inundation heights of over 10 m were measured at Cipenyu Beach (Pandeglang Regency) in Java island (south-south-eastern direction from Anak Krakatau). A questionnaire survey conducted by the authors revealed residents’ perception of danger and evacuation patterns during the event. The results indicate the importance of having an operational tsunami warning system in Sunda Strait and the establishment of an appropriate evacuation plan so that residents can start evacuation immediately and reach a safe place without facing severe congestion along evacuation routes.

中文翻译：

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2018年巽他海峡海啸现场调查及疏散行为

摘要 2018 年 12 月 22 日，印度尼西亚巽他海峡的海岸线遭到了喀拉喀托火山侧翼坍塌产生的海啸波的袭击。作者对苏门答腊岛和爪哇岛的受灾地区进行了实地调查，以收集有关海啸淹没和上升高度、每个沿海社区的破坏模式以及受灾民众的疏散行为和海啸意识的信息。调查结果显示，在苏门答腊岛，位于喀拉喀托东北偏北的海岸线测得的淹没高度超过 4 m，而沿西北方向测得的淹没高度小于 4 m。在爪哇岛的 Cipenyu 海滩（Pandeglang Regency）（从 Anak Krakatau 向东南-东南方向）测量到超过 10 m 的淹没高度。作者进行的问卷调查揭示了活动期间居民对危险的感知和疏散模式。结果表明在巽他海峡建立可操作的海啸预警系统和制定适当的疏散计划的重要性，以便居民可以立即开始疏散并到达安全的地方，而不会在疏散路线上面临严重的拥堵。