A new dual earthquake and submarine landslide source model for the 28 September 2018 Palu (Sulawesi), Indonesia tsunami

IF 1.9 3区工程技术 Q3 ENGINEERING, CIVIL

Coastal Engineering Journal Pub Date : 2022-09-19 DOI:10.1080/21664250.2022.2122293

M. Heidarzadeh, I. Mulia

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引用次数: 5

Abstract

ABSTRACT The September 2018 Palu (Sulawesi, Indonesia) tsunami has been a heavily debated event because multiple source models of three different types have been proposed for this tsunami: (i) The Mw 7.5 earthquake, (ii) landslides, and (iii) dual earthquake and landslide. Surprisingly, all of these three types of models were reported as being successful in the literature in terms of reproducing the existing tsunami observations. This can be partly attributed to the limited observations available for this tsunami. This study is motivated by the results of a marine bathymetric survey, which identified evidence for submarine landslides within the Palu Bay. Our modeling shows that the tsunami cannot be exclusively attributed to the Mw 7.5 earthquake. Inspired by the results of the marine survey, we propose a dual source model including a submarine landslide although most of the existing models include subaerial coastal landslides. Our dual model comprises an earthquake model, which has a length of 264 km, a width of 37 km, and a slip of 0–8.5 m, combined with a submarine landslide with a length of 1.0 km, a width of 2.0 km, and a thickness of 80.0 m located at 119.823°E and −0.792°S.

查看原文本刊更多论文

2018年9月28日印度尼西亚巴鲁（苏拉威西）海啸的一个新的双重地震和海底滑坡源模型

摘要2018年9月巴鲁（印度尼西亚苏拉威西）海啸一直是一个备受争议的事件，因为已经为这次海啸提出了三种不同类型的多源模型：（i）7.5级地震，（ii）滑坡，以及（iii）双重地震和滑坡。令人惊讶的是，所有这三种类型的模型在文献中都被报道为在再现现有海啸观测方面是成功的。这在一定程度上可以归因于对这次海啸的观测有限。这项研究的动机是海洋测深调查的结果，该调查确定了巴鲁湾海底滑坡的证据。我们的模型表明，海啸不能完全归因于7.5级地震。受海洋调查结果的启发，我们提出了一个包括海底滑坡的双源模型，尽管大多数现有模型包括陆上海岸滑坡。我们的双重模型包括一个长264公里、宽37公里、滑动0–8.5米的地震模型，以及位于119.823°E和−0.792°S的长1.0公里、宽2.0公里、厚80.0米的海底滑坡。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Coastal Engineering Journal 工程技术-工程：大洋

CiteScore

4.60

自引率

8.30%

发文量

审稿时长

7.5 months

期刊介绍： Coastal Engineering Journal is a peer-reviewed medium for the publication of research achievements and engineering practices in the fields of coastal, harbor and offshore engineering. The CEJ editors welcome original papers and comprehensive reviews on waves and currents, sediment motion and morphodynamics, as well as on structures and facilities. Reports on conceptual developments and predictive methods of environmental processes are also published. Topics also include hard and soft technologies related to coastal zone development, shore protection, and prevention or mitigation of coastal disasters. The journal is intended to cover not only fundamental studies on analytical models, numerical computation and laboratory experiments, but also results of field measurements and case studies of real projects.