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Tsunami modeling of a submarine landslide in the Fram Strait

Tsunami modeling of a submarine landslide in the Fram Strait
Tsunami modeling of a submarine landslide in the Fram Strait
The present geological setting west of Svalbard closely parallels the situation off mid-Norway after the last glaciation, when crustal unloading by melting of ice induced very large earthquakes. Today, on the modern Svalbard margin, increasing bottom water temperatures are destabilizing marine gas hydrates, which are held in continental margin sediments consisting of interlayered contourite deposits and glacigenic debris flows. Both unloading earthquakes and hydrate failure have been identified as key factors causing several megalandslides off Norway during early Holocene deglaciation. The most prominent event was the Storegga Slide 8200 years B.P. which caused a tsunami up to 23 m high on the Faroe and Shetland islands. Here we show by numerical tsunami modeling that a smaller submarine landslide west of Svalbard, 100 m high and 130 km wide, would cause a tsunami capable of reaching northwest Europe and threatening coastal areas. A tsunami warning system based on tiltmeters would give a warning time of 1–4 h.
1525-2027
Q04009
Berndt, Christian
d6db3f62-9891-4e8a-9210-b3aa6a8a4c22
Brune, Sascha
2610fb89-af9e-4fae-8292-fac70ec15418
Nisbet, Euan
a591bc4d-c09b-43f2-b922-beb39ac41c5f
Zschau, Jochen
270e7fee-6be0-4c75-8900-1b4723b25b96
Sobolev, Stephan V.
25fe6199-b815-4b8c-ba7d-faa4d09505c9
Berndt, Christian
d6db3f62-9891-4e8a-9210-b3aa6a8a4c22
Brune, Sascha
2610fb89-af9e-4fae-8292-fac70ec15418
Nisbet, Euan
a591bc4d-c09b-43f2-b922-beb39ac41c5f
Zschau, Jochen
270e7fee-6be0-4c75-8900-1b4723b25b96
Sobolev, Stephan V.
25fe6199-b815-4b8c-ba7d-faa4d09505c9

Berndt, Christian, Brune, Sascha, Nisbet, Euan, Zschau, Jochen and Sobolev, Stephan V. (2009) Tsunami modeling of a submarine landslide in the Fram Strait. Geochemistry, Geophysics, Geosystems, 10, Q04009. (doi:10.1029/2008GC002292).

Record type: Article

Abstract

The present geological setting west of Svalbard closely parallels the situation off mid-Norway after the last glaciation, when crustal unloading by melting of ice induced very large earthquakes. Today, on the modern Svalbard margin, increasing bottom water temperatures are destabilizing marine gas hydrates, which are held in continental margin sediments consisting of interlayered contourite deposits and glacigenic debris flows. Both unloading earthquakes and hydrate failure have been identified as key factors causing several megalandslides off Norway during early Holocene deglaciation. The most prominent event was the Storegga Slide 8200 years B.P. which caused a tsunami up to 23 m high on the Faroe and Shetland islands. Here we show by numerical tsunami modeling that a smaller submarine landslide west of Svalbard, 100 m high and 130 km wide, would cause a tsunami capable of reaching northwest Europe and threatening coastal areas. A tsunami warning system based on tiltmeters would give a warning time of 1–4 h.

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Published date: 2009

Identifiers

Local EPrints ID: 71938
URI: https://eprints.soton.ac.uk/id/eprint/71938
ISSN: 1525-2027
PURE UUID: ce793a97-4773-4eed-adeb-c76c8bf19327

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Date deposited: 11 Jan 2010
Last modified: 18 Jul 2017 23:57

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Contributors

Author: Christian Berndt
Author: Sascha Brune
Author: Euan Nisbet
Author: Jochen Zschau
Author: Stephan V. Sobolev

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