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

被引：38

作者：

Lo Iacono, Claudio ^{[1
,2
]}

Gracia, Eulalia ^{[1
]}

Zaniboni, Filippo ^{[3
]}

Pagnoni, Gianluca ^{[3
]}

Tinti, Stefano ^{[3
]}

Bartolome, Rafael ^{[1
]}

Masson, Douglas G. ^{[2
]}

Wynn, Russell B. ^{[2
]}

Lourenco, Nuno ^{[4
]}

de Abreu, Manuel Pinto ^{[4
]}

Jose Danobeitia, Juan ^{[1
]}

Zitellini, Nevio ^{[5
]}

机构：

[1] CSIC, Unidad Tecnol Marina, E-08003 Barcelona, Spain

[2] Natl Oceanog Ctr, Southampton SO14 3ZH, Hants, England

[3] Univ Bologna, Dipartmento Fis & Astron, I-40127 Bologna, Italy

[4] Estrutura Missao Extensao Plataforma Continental, P-2770047 Paco De Arcos, Portugal

[5] CNR, Ist Sci Marine, I-40129 Bologna, Italy

来源：

GEOLOGY | 2012年 / 40卷 / 10期

关键词：

US EAST-COAST; HAZARD; SIMULATIONS; SOUTHWEST;

D O I：

10.1130/G33446.1

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Deepwater landslides are often underestimated as potential tsunami triggers. The North Gorringe avalanche (NGA) is a large (similar to 80 km(3) and 35 km runout) newly discovered and deepwater (2900 m to 5100 m depth) mass failure located at the northern flank 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-field 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 similar to 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.

引用

页码：931 / 934

页数：4

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