Tsunami modeling of a submarine landslide in Fram Strait.

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

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Abstract

[1] 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.

Document Type: Article
Keywords: global change; tsunamis; submarine landslides, Fram Strait
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/2008GC002292
ISSN: 1525-2027
Projects: Future Ocean
Date Deposited: 27 May 2009 16:58
Last Modified: 14 Mar 2018 13:44
URI: http://oceanrep.geomar.de/id/eprint/7816

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