A giant three-stage submarine slide off Norway

Bugge, Tom; Befring, Stein; Belderson, R. H.; Eidvin, Tor; Jansen, Eystein; Kenyon, Neil H.; Holtedahl, Hans; Sejrup, Hans Petter

doi:10.1007/bf02242771

Cited by 261 publications

(121 citation statements)

References 11 publications

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“…The Storegga Slide on the continental slope off Western Norway around 8150 yr BP is one of the largest and best-studied submarine landslides on Earth (Bugge et al, 1987(Bugge et al, , 1988Haflidason et al, 2004;Bryn et al, 2005;Kvalstad et al, 2005). The landslide comprised a volume of about 2400 km 3 .…”

Section: The Storegga Submarine Landslidementioning

confidence: 99%

Dispersion of tsunamis: does it really matter?

Glimsdal

Pedersen

Harbitz

et al. 2013

Nat. Hazards Earth Syst. Sci.

186

131

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Abstract. This article focuses on the effect of dispersion in the field of tsunami modeling. Frequency dispersion in the linear long-wave limit is first briefly discussed from a theoretical point of view. A single parameter, denoted as "dispersion time", for the integrated effect of frequency dispersion is identified. This parameter depends on the wavelength, the water depth during propagation, and the propagation distance or time. Also the role of long-time asymptotes is discussed in this context. The wave generation by the two main tsunami sources, namely earthquakes and landslides, are briefly discussed with formulas for the surface response to the bottom sources. Dispersive effects are then exemplified through a semi-idealized study of a moderate-strength inverse thrust fault. Emphasis is put on the directivity, the role of the "dispersion time", the significance of the Boussinesq model employed (dispersive effect), and the effects of the transfer from bottom sources to initial surface elevation. Finally, the experience from a series of case studies, including earthquake- and landslide-generated tsunamis, is presented. The examples are taken from both historical (e.g. the 2011 Japan tsunami and the 2004 Indian Ocean tsunami) and potential tsunamis (e.g. the tsunami after the potential La Palma volcanic flank collapse). Attention is mainly given to the role of dispersion during propagation in the deep ocean and the way the accumulation of this effect relates to the "dispersion time". It turns out that this parameter is useful as a first indication as to when frequency dispersion is important, even though ambiguity with respect to the definition of the wavelength may be a problem for complex cases. Tsunamis from most landslides and moderate earthquakes tend to display dispersive behavior, at least in some directions. On the other hand, for the mega events of the last decade dispersion during deep water propagation is mostly noticeable for transoceanic propagation.

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Section: The Storegga Submarine Landslidementioning

confidence: 99%

Dispersion of tsunamis: does it really matter?

Glimsdal

Pedersen

Harbitz

et al. 2013

Nat. Hazards Earth Syst. Sci.

186

131

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“…One of the largest Holocene sub-marine slides mapped on Earth is the Storegga slide offshore Norway [Bugge, 1987] (Figure 1). Approximately 3500 km 3 material slid out and generated a huge tsunami dated to about 7300 1 14 4 C yr BP [Bondevik et al, 1997a], or ca 8150 calendar years BP.…”

mentioning

confidence: 99%

Record‐breaking height for 8000‐year‐old tsunami in the North Atlantic

et al. 2003

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One of the largest Holocene sub‐marine slides mapped on Earth is the Storegga slide offshore Norway [Bugge, 1987] (Figure 1). Approximately 3500 km3 material slid out and generated a huge tsunami dated to about 7300 14C yr BP [Bondevik et al., 1997a], or ca 8150 calendar years BP. The tsunami is known from onshore deposits in Norway [Bondevik et al., 1997a], on the Faroe Islands [Grauert et al., 2001], and in Scotland [Dawson et al., 1993]. Of these, the tsunami deposits in western Norway reaches the highest elevation, indicating a runup of 10–12 m. In this article, we demonstrate that at the Shetland Islands between Norway and Scotland (Figure 1), this tsunami reached onshore heights at least 20 m above the sea level of that time.

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“…The excess pore pressure will increase and the sediment's strength will decrease if the released gas cannot drain quickly, which can cause kinds of disasters, such as destruction of ocean platforms, oil wells or even gas blowouts (Milkov 2000;Xu and Germanovich 2006;Zhang et al 2010Zhang et al , 2011Chaouch and Briaud 1997). For example, some studies showed that the Storegga landslide on the Norwegian continental shelf, the largest landslide in the world with 2500-3200 m 3 sediments brought away, was induced by NGH dissociation (Bugge et al 1987). NGH dissociation is also thought to be the reason of the US mid-Atlantic coast slide (Jung and Peter 2004).…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation on the marine landslide due to gas hydrate dissociation

Chen

et al. 2017

Environ Earth Sci

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Marine landslide due to gas hydrate dissociation is a kind of potential heavy hazards. Numerical simulation was processed to investigate the deformation, landslide and effects of main factors on the critical scale of dissociation zone to induce marine landslides during/after dissociation of gas hydrate. A simple method for analyzing the critical scale was presented based on the limit equilibrium method. It is shown that the maximum settlement is located near the upper side of the dissociation zone. The soil near the lower side of the dissociation zone uplifts. There is a critical scale of dissociation zone over which landslide will occur under given conditions. Expansion modes of the dissociation zone have obvious effects on the critical scale.

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A giant three-stage submarine slide off Norway

Cited by 261 publications

References 11 publications

Dispersion of tsunamis: does it really matter?

Dispersion of tsunamis: does it really matter?

Record‐breaking height for 8000‐year‐old tsunami in the North Atlantic

Numerical simulation on the marine landslide due to gas hydrate dissociation

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