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Large, deepwater slope failures: Implications for landslide-generated tsunamis

Lo Iacono, C., Gracia, E., Zaniboni, F., Pagnoni, G., Tinti, S., Bartolome, R., Masson, D.G., Wynn, R.B., Lourenco, N., de Abreu, M.P., Danobeitia, J.J. and Zitellini, N. (2012) Large, deepwater slope failures: Implications for landslide-generated tsunamis Geology, 40, (10), pp. 931-934. (doi:10.1130/G33446.1).

Record type: Article

Abstract

Deepwater landslides are often underestimated as potential tsunami triggers. The North Gorringe avalanche (NGA) is a large (~80 km3 and 35 km runout) newly discovered and deepwater (2900 m to 5100 m depth) mass failure located at the northern fl ank of Gorringe Bank on the southwest Iberian margin. Steep slopes and pervasive fracturing are suggested as the main preconditioning factors for the NGA, while an earthquake is the most likely trigger mechanism. Near-fi eld tsunami simulations show that a mass failure similar to the NGA could generate a wave >15 m high that would hit the south Portuguese coasts in ~30 min. This suggests that deepwater landslides require more attention in geo-hazard assessment models of southern Europe, as well as, at a global scale, in seismically active margins.

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Published date: October 2012
Organisations: Marine Geoscience

Identifiers

Local EPrints ID: 342615
URI: http://eprints.soton.ac.uk/id/eprint/342615
ISSN: 0091-7613
PURE UUID: e4f69b8e-f434-43bb-8f14-204fb7735954

Catalogue record

Date deposited: 10 Sep 2012 09:34
Last modified: 18 Jul 2017 05:27

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Contributors

Author: C. Lo Iacono
Author: E. Gracia
Author: F. Zaniboni
Author: G. Pagnoni
Author: S. Tinti
Author: R. Bartolome
Author: D.G. Masson
Author: R.B. Wynn
Author: N. Lourenco
Author: M.P. de Abreu
Author: J.J. Danobeitia
Author: N. Zitellini

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