Caracterización de grandes estructuras sismogénicas y tsunamogénicas del Golfo de Cádiz con tecnologías de muy alta resolución : Cruise Report INSIGHT-Leg 1

Cruise Report INSIGHT-Leg 1 R/V Sarmiento de Gamboa (SDG-68) 29th April - 18th May 2018.-- 139 pages, figures, tables, 2 annexesLarge earthquakes, submarine landslides and the tsunami they might originate are geohazards of great societal concern because they may impact world economies and struck coastal populations. Examples of these events are the 2004 northern Sumatra and 2011 Tohoku earthquakes and respective tsunamis. However, earthquakes of magnitude Mw > 8.0 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. The most relevant is the 1755 Lisbon earthquake, related submarine landslides and destructive tsunami. The occurrence of faults and landslides able to trigger a catastrophic tsunami reveals that the Gulf of Cadiz is one of the highest geohazard areas in Europe. Migration of sub-seafloor fluids has also been widely documented in the Gulf of Cadiz and such fluids are strongly related to the earthquake cycle and to the occurrence of submarine landslides. Understanding of these active processes can only be developed by using ultra-high-resolution tools able to map with unprecedented detail faults, submarine landslides and fluid escape structures. State-of-the-art techniques are used during INSIGHT-Leg 1, such as microbathymetry obtained from an autonomous underwater vehicle (AUV), sub-bottom profiles, HR multi-channel seismic data (MCS), and groundtruthing using sediment coresWe gratefully acknowledge financial support from Ministerio Economia y Competividad through national project INSIGHT “ImagiNg large SeismogenIc and tsunamiGenic structures of the Gulf of Cadiz with ultra-High resolution Technologies (INSIGHT-Leg1)” (CGL2011-30005-C02-02, PIs: Roger Urgeles and Eulàlia Gràcia) and Ocean Facilities Exchange Group (OFEG) for allowing us to use the AUVs “Abyss” from GEOMAR (Germany

INSIGHT Leg 2 Survey : ImagiNg large SeismogenIc and tsunamiGenic structures of the gulf of cadiz with ultra-High resolution Technologies : Cruise report

Cruise Report ImagiNg large SeismogenIc and tsunamiGenic structures of the gulf of cadiz with ultra-High resolution Technologies (INSIGHT), R/V Sarmiento de Gamboa, 30 September - 20 October 2019.-- 127 pages, 103 figures, 11 tables, annexesThis report contains exhaustive information on the objectives, activities, instrumentation used and preliminary data acquired during the 2nd Leg of the INSIGHT cruise, which started in Vigo (Spain) on September 30 and finished in Cadiz (Spain), on October 20, 2019, and took place on boardthe Spanish R/V BO Sarmiento de Gamboa. This 2nd Leg was aimed at imaging and characterizing, with the highest possible resolution, selected active seismogenic faults, large slope failures and investigate their relation with fluid seepage in the Gulf of Cadiz. The large-scale features of most of these elements, such as fault systems and slope failures have been previously mapped and characterized (i.e. geometry, dynamics and kinematics) during national and European projects and cruises. […]The survey was mainly funded through the Spanish ministry Plan Nacional Program (INSIGHT project, Ref. # CTM2015-70155-R) (Coordinators Roger Urgeles & Eulàlia Gràcia