PUMA
Istituto di Scienze Marine     
Lo Iacono C., Gracia E., Zaniboni F., Pagnoni G., Bartolome R., Masson D., Wynn R. B., Lourenco N., De Abreu M. P., Danobeitia J. J., Zitellini N. Large, deepwater slope failures: Implications for landslide-generated tsunamis. In: Geology, vol. 40 (10) pp. 931 - 934. GEOLOGICAL SOC AMER, INC, PO BOX 9140, BOULDER, CO 80301-9140 USA, 2012.
 
 
Abstract
(English)
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.
DOI: 10.1130/G33446.1
Subject US EAST-COAST; GORRINGE BANK; NUMERICAL SIMULATIONS; SUBMARINE LANDSLIDES; ATLANTIC-OCEAN; HAZARD; EARTHQUAKES; SOUTHWEST; PORTUGAL; MARGIN


Icona documento 1) Download Document PDF


Icona documento Open access Icona documento Restricted Icona documento Private

 


Per ulteriori informazioni, contattare: Librarian http://puma.isti.cnr.it

Valid HTML 4.0 Transitional