Hybrid modeling of the mega‐tsunami runup in Lituya Bay after half a century
Hybrid modeling of the mega‐tsunami runup in Lituya Bay after half a century
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DOI：
10.1029/2009gl037814
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发表时间：
2009-05
影响因子：
5.2
通讯作者：
R. Weiss;H. Fritz;K. Wünnemann
中科院分区：
文献类型：
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作者：
R. Weiss;H. Fritz;K. Wünnemann
最大的一次大海啸可以追溯到半个世纪的1958年7月10日，当时公众几乎没有注意到，费尔韦瑟断层发生了一次里氏8.3级的地震，引发了一次岩石滑坡进入利图亚湾。岩石滑坡的影响在Lituya湾的头部产生了巨大的海啸，导致了前所未有的海啸在滑动轴直接延伸的一个马刺山脊上上升了524米。一条森林修剪线和侵蚀到基岩标志着有史以来最大的一次攀登。虽然这些观察结果没有受到直接挑战，但在减灾研究中，它们在很大程度上被忽视了，因为即使提出-更不用说解决-一个明确的物理问题进行调查也很困难。我们研究了大海啸的混合建模方法，应用物理和数值模型的滑动过程中的变形体到一个U形沟槽类似的几何形状在Lituya湾。
The largest mega‐tsunami dates back half a century to 10 July 1958, when almost unnoticed by the general public, an earthquake of Mw 8.3 at the Fairweather Fault triggered a rockslide into Lituya Bay. The rockslide impact generated a giant tsunami at the head of Lituya Bay resulting in an unprecedented tsunami runup of 524 m on a spur ridge in direct prolongation of the slide axis. A forest trim line and erosion down to bedrock mark the largest runup in recorded history. While these observations have not been challenged directly, they have been largely ignored in hazard mitigation studies, because of the difficulties of even posing – much less solving – a well‐defined physical problem for investigation. We study the mega‐tsunami runup with a hybrid modeling approach applying physical and numerical models of slide processes of deformable bodies into a U‐shaped trench similar to the geometry found at Lituya Bay.