根据地震和滑坡情况确定 1996 年比亚克海啸的源头特征

IF 1.6 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS Marine Geophysical Research Pub Date : 2024-08-22 DOI:10.1007/s11001-024-09556-1
Abraham Arimuko, Sesar Prabu Dwi Sriyanto, Tomy Gunawan, Tatok Yatimantoro
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引用次数: 0

摘要

1996 年 2 月 17 日世界协调时 5:59(当地时间 14:59)发生的 8.2 级地震引发了比亚克海啸事件。根据实地调查,最大海啸高度并不位于直接面对震中的海岸。对岸的 Farusi 村记录到的最大海啸高达 7.7 米。除了海啸冲击高度高之外,海啸到达该村的时间快也是一个异常现象,这引起了人们对多个海啸源的质疑。以前的研究怀疑发生断裂时有山体滑坡,但还没有人确定山体滑坡的规模和机制。这项研究的目的是加深对海啸发生源的了解,并回答这个问题。使用 COMCOT 软件进行海啸模拟,同时整合断层和滑坡源。本研究从断层源模型中获得了比亚克海啸发生器,该模型长 272 千米,宽 110 千米,平均错位 8 米,最大滑移 10.6 米。其中一个主要滑坡源模型的长度和宽度分别为 5.629 千米和 14.595 千米,滑坡物质厚度为 50 米,滑动面的平均坡度为 10°,位于拉马尔多里。这两个海啸源模型回答了比亚克海啸事件的特殊问题。
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Source characterization of the 1996 Biak tsunami based on earthquake and landslide scenarios

The Biak tsunami event on February 17, 1996, was triggered by a Mw 8.2 earthquake at 5:59 UTC (14:59 local time). Based on the field survey, the maximum tsunami height was not located on the coast that directly faces the earthquake epicenter. The maximum tsunami of up to 7.7 m was recorded at Farusi village on the opposite coast. In addition to the high tsunami hit, the fast arrival time in this village was an anomaly that raised questions regarding the multiple tsunami sources. Previous studies suspected a landslide when a rupture occurred, but no one had yet identified the dimensions and mechanism of the landslide. The purpose of this research is to increase understanding of tsunami generators and answer that question. The COMCOT software is used to perform tsunami simulations, integrating fault and landslide sources simultaneously. This study obtains the Biak tsunami generator from a fault source model with a length of 272 km, a width of 110 km, an average dislocation of 8 m, and a maximum slip of 10.6 m. Also, there are three landslides occurred in the south coast. One of the major landslide source model has dimensions length and width of 5.629 km and 14.595 km, respectively, and a thickness of landslide material of 50 m, with an average slope of the slip plane of 10° located in the Ramardori. These two source models answer the particular questions of the Biak tsunami incident.

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来源期刊
Marine Geophysical Research
Marine Geophysical Research 地学-地球化学与地球物理
CiteScore
2.80
自引率
14.30%
发文量
41
审稿时长
>12 weeks
期刊介绍: Well-established international journal presenting marine geophysical experiments on the geology of continental margins, deep ocean basins and the global mid-ocean ridge system. The journal publishes the state-of-the-art in marine geophysical research including innovative geophysical data analysis, new deep sea floor imaging techniques and tools for measuring rock and sediment properties. Marine Geophysical Research reaches a large and growing community of readers worldwide. Rooted on early international interests in researching the global mid-ocean ridge system, its focus has expanded to include studies of continental margin tectonics, sediment deposition processes and resulting geohazards as well as their structure and stratigraphic record. The editors of MGR predict a rising rate of advances and development in this sphere in coming years, reflecting the diversity and complexity of marine geological processes.
期刊最新文献
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