Hydraulic and numerical study on the generation of a subaqueous landslide-induced tsunami along the coast

Shigihara, Yoshinori; Goto, Daichi; Imamura, Fumihiko; Kitamura, Yuichi; Matsubara, Takayuki; Takaoka, Kazuaki; Ban, Kazuhiko

doi:10.1007/s11069-006-0021-y

Cited by 17 publications

(7 citation statements)

References 8 publications

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“…Wiegel [7], while tsunami generation due to particles moving down a slope, was studied by e.g. Walder et al [8], and Shigihara et al [9], using sands for falling bodies, Shigematsu and Kohno [10] glass beads, and Mohammed and Fritz [11] naturally rounded river gravel. In the laboratory experiments by Riu et al [12], the falling bodies were glass balls with different diameters, glass beads, natural stones, acrylic rock-shape blocks, ice balls, etc.…”

Section: Tsunami 36mentioning

confidence: 99%

Tsunami Generation Due to a Landslide or a Submarine Eruption

Kakinuma¹

2016

Tsunami

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Tsunamis can be triggered by not only submarine earthquakes, but also by landslides, and submarine volcanic eruptions. First, several characteristics of tsunami generation due to a landslide, or a sector collapse, are studied, with the tsunamis simulated numerically, to represent their generation through an interaction between falling bodies, and seawater, in two vertical dimensions. The falling body is assumed to be a fluid, or a rigid body, which moves down a slope with a constant gradient. Second, the mechanism of tsunami generation caused by a submarine volcanic eruption, is discussed, focusing on a phreatomagmatic explosion, where after exposure to high temperature magma, seawater evaporates instantly, with an explosive increase in its volume. An index for submarine volcanic explosive force, concerning tsunami generation, has been developed, by assuming the relationship between a phreatomagmatic explosion, and the resultant initial tsunami waveform. A numerical simulation was also generated, with a specific value for this index, for the propagation of tsunamis due to a submarine volcanic eruption in Kagoshima Bay, where a submarine explosion, leading to tsunami generation, has been observed.

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Section: Tsunami 36mentioning

confidence: 99%

Tsunami Generation Due to a Landslide or a Submarine Eruption

Kakinuma¹

2016

Tsunami

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“…Submarine landslide could also cause destructive effect, such as evidence in the 1998 PNG tsunami -Indonesia neighbor country in the east (Tappin et al, 2008). Shigihara et al (2006) carried out hydraulic experiment in the laboratory how a landslide on a uniform slope causes the generation of a tsunami. They noticed that interaction between material and water is significant generating tsunami, while the continuous material flow makes tsunami wave period short.…”

Section: Submarine Landslidementioning

confidence: 99%

“…According to Pakoksung et al (2019) submarinelandslide tend to generate large localized waves tsunami compared to the longwave system tsunami resulted from submarine earthquake. Compared to earthquake-generated tsunamis models that well developed and widely used, numerical models for landslidegenerated tsunamis are inadequate (Heinrich et al, 2001;Shigihara et al, 2006).…”

Section: Southwest Of Seram Island In Northern Coast Ofmentioning

confidence: 99%

Review of Submarine Landslides in the Eastern Indonesia Region

Kurnio

Naibaho

Purwanto

2019

BoMG

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his paper reviews submarine landslide potential in the eastern Indonesia by analyzing published and recently acquired bathymetric data and interpreting seismic reflection data. This review aims to study and invent hazards that might affect seafloor infrastructure construction such as optic cables, especially in the eastern Indonesia Region. The hazards were also recognized as source of tsunamis such as Palu Bay 2018 and Babi Island north of Flores Island in 1992. On the other hand, submarine landslide is a common process of basin fill sedimentation in the region. As blessed with many active volcanoes, it has 130 of total the world 400, Indonesia should aware of tsunami induced by volcanoes especially the ones closed to the sea. There are five active volcanoes frequently produce tsunami in historical times: Anak Krakatau, Sunda Strait; Makian, Maluku Province; Sangihe, Sulawesi; Teon and Nila, Banda Sea; and Iliwerung, Lembata Island, east Lesser Sunda Islands.Key words: submarine landslide, volcanic tsunami, seafloor infrastructure, eastern Indonesia Makalah ini menelaah potensi langsoran dasar laut di wilayah Timur Indonesia melalui analisis publikasi dan data batimetri yang baru diambil serta penafsiran data seismic refleksi. Tinjauan longsoran dasar laut dimaksudkan untuk mempelajari dan menginventarisasi bencana yang mungkin bisa mempengaruhi pembangunan infrastruktur dasar laut seperti halnya kabel optic, terutama di wilayah Timur Indonesia. Bencana tersebut telah dikenal sebagai sumber beberapa tsunami seperti Teluk Palu 2018 dan Pulau Babi utara Lombok di tahun 1992. Sebaliknya, longsoran dasar laut merupakan proses sedimentasi pengisian cekungan yang biasa terjadi di wilayah tersebut. Dikarunia akan gunungapi terbanyak di dunia, sebab memiliki 130 dari 400 dunia, Indonesia harus menyadari bahaya tsunami yang ditimbulkan oleh aktivitas gunungapi terutama yang dekat laut. Terdapat lima gunungapi aktif yang sering menghasilkan tsunami dalam sejarah: Anak Krakatau, Selat Sunda; Makian, Provinsi Maluku; Sangihe, Sulawesi; Teon dan Nila, Laut Banda; dan Iliwerung, Pulau Lembata, Nusa Tenggara Timur.Kata kunci: longsoran dasar laut, tsunami gunungapi, infrastruktur dasar laut, Wilayah Indonesia Timur

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“…The boundary conditions are of pure transmission on the open sea boundary, while the interaction with the coast is regulated by a reflection coefficient, allowing also a partial absorption of the tsunami energy (TINTI et al, 1994). Further, the bottom friction is accounted for through the Manning's expression in which n is the dimensional roughness coefficient, that usually is assumed between 0.01-0.03 s m -1/3 offshore, while it has larger values in the inundation zone, depending on local ground conditions (see SHIGIHARA et al, 2006). Since we do not compute tsunami flooding in this paper through the code UBO-TSUFE, but we use a static domain with vertical reflecting walls at coastal boundaries, we adopt here the standard offshore coefficient values for n.…”

Section: Numerical Simulationsmentioning

confidence: 99%

Stromboli Island (Italy): Scenarios of Tsunamis Generated by Submarine Landslides

Tinti

Zaniboni

Pagnoni

et al. 2008

Pure appl. geophys.

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Stromboli is an Italian volcanic island known for its persistent state of activity, which leads to frequent mass failures and consequently to frequent tsunamis ranging from large (and rare) catastrophic events involving the entire southern Tyrrhenian Sea to smaller events with, however, extremely strong local impact. Most of tsunamigenic landslides occur in the Sciara del Fuoco (SdF) zone, which is a deep scar in the NW flank of the volcano, that was produced by a Holocene massive flank collapse and that is the accumulation area of all the eruptive ejecta from the craters. Shallow-water bathymetric surveys around the island help one to identify submarine canyons and detachment scars giving evidence of mass instabilities and failures that may have produced and might produce tsunamis. The main purpose of this paper is to call attention to tsunami sources in Stromboli that are located outside the SdF area. Further, we do not touch on tsunami scenarios associated with gigantic sector collapses that have repeat times in the order of several thousands of years, but rather concentrate on intermediate size tsunamis, such as the ones that occurred in December 2002. Though we cannot omit tsunamis from the zone of the SdF, the main emphasis is on the elaboration of preliminary scenarios for three more possible source areas around Stromboli, namely Punta Lena Sud, Forgia Vecchia and Strombolicchio, with the aim of purposeful contributing to the evaluation of the hazard associated with such events and to increase the knowledge of potential threats affecting Stromboli and the nearby islands of the Aeolian archipelago.The simulations show that tsunami sources outside of the SdF can produce disastrous effects. As a consequence, we recommend that the monitoring system that is presently operating in Stromboli and that is focussed on the SdF source area be extended in order to cover even the other sources. Moreover, a synoptic analysis of the results from all the considered tsunami scenarios leads to a very interesting relation between the tsunami total energy and the landslide potential energy, that could be used as a very effective tool to evaluate the expected tsunami size from estimates of the landslide size.

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Hydraulic and numerical study on the generation of a subaqueous landslide-induced tsunami along the coast

Cited by 17 publications

References 8 publications

Tsunami Generation Due to a Landslide or a Submarine Eruption

Tsunami Generation Due to a Landslide or a Submarine Eruption

Review of Submarine Landslides in the Eastern Indonesia Region

Stromboli Island (Italy): Scenarios of Tsunamis Generated by Submarine Landslides

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