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Título

High-resolution imaging of submarine large seismogenic and tsunamigenic structures in the SW Iberian Margin: new insights from insight survey (2018)

AutorBartolomé, Rafael CSIC ORCID CVN ; Gràcia, Eulàlia CSIC ORCID ; Urgeles, Roger CSIC ORCID ; Lo Iacono, Claudio CSIC ORCID; Martínez-Loriente, S. CSIC ORCID ; Camafort Blanco, Miquel CSIC ORCID; Mencaroni, Davide CSIC ORCID ; Meservy, William CSIC ; Sànchez-Serra, Cristina CSIC ORCID
Palabras claveActive faults
Ultra-high resolution technologies
Earthquakes
Submarine landslides
Fecha de publicaciónjun-2018
CitaciónIberfault 2018 : Avances en el estudio de Fallas Activas, Terremotos y Peligrosidad Sísmica de Iberia : III Reunión Ibérica sobre Fallas Activas y Paleosismología : Volumen de resúmenes: 305-308 (2018)
ResumenLarge earthquakes, submarine landslides and their occasional tsunami originated are geohazards of great societal concern because of the impact on the world economies and coastal populations. Dramatic examples of such events include the 2004 northern Sumatra and 2011 Tohoku earthquakes and tsunamis. However, earthquakes of magnitude > 7.0 in areas of relatively slow tectonic deformation and with long recurrence intervals, such as the external part of the Gulf of Cadiz, might also have a significant impact as the well-known case of the destructive 1755 Lisbon earthquake, related submarine landslides, and resulting tsunami. Although the Gulf of Cadiz is one of the highest geohazard zones in Europe, we currently lack appropriate understanding of both the rupture areas and stress-state of the faults and sediments in which such catastrophic events originated. The relatively great water depths, poor accuracy on the location of moderate-to¬-high magnitude earthquakes, lack of understanding of subsurface hydrology and the few constraints on ages of the sedimentary sequences hinder an appropriate understanding of location and characteristics of earthquake ruptures and associated submarine landslides in the Gulf of Cadiz. Our hypothesis is that such understanding can only be developed by using ultra-high resolution (UHR) tools capable of providing the characterization of faults, submarine landslides, and fluid escape structures while being able to work in deep waters such as those of the external Gulf of Cadiz. INSIGHT tackles this problem by using state-of ¬the-art UHR techniques such as microbathymetry, 2D high-resolution seismic data, and sampling using piston cores. We aim at 1) Map in detail the active faults with largest seismogenic potential, 2) Accurately determine the seismic parameters of these faults, 3) Characterize associated submarine landslides, 4) Assess the likelihood of recent submarine landslides activation, and finally, 5) Evaluate the seismogenic and tsunamigenic potential of the largest tectonic sources
DescripciónInciativa Ibérica para el Estudio de las Fallas Activas, Tercera Reunión Ibérica sobre Fallas Activas y Paleosismología IBERFAULT 2018 - Third Iberian Meeting on Active Faults and Paleoseismology, 11-13 June 2018, Alicante, Spain.-- 4 pages, 2 figures
Versión del editorhttp://home.iberfault.org/
URIhttp://hdl.handle.net/10261/171760
Identificadoresisbn: 978-84-09-02473-5
Aparece en las colecciones: (ICM) Comunicaciones congresos




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