2024-03-29T07:18:10Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1885192022-03-08T12:58:17Zcom_10261_123com_10261_8col_10261_502
DIGITAL.CSIC
author
Sànchez-Serra, Cristina
author
Gràcia, Eulàlia
author
Urgeles, Roger
author
Martínez-Loriente, S.
author
Gómez de la Peña, L.
author
Lorito, Stefano
author
Piatanesi, Alessio
author
Romano, Fabrizio
author
Maesano, Francesco
author
Basili, Roberto
author
Volpe, Manuela
2019-08-20T06:37:11Z
2019-08-20T06:37:11Z
2019-06
4th Fault2SHA Workshop (2019)
http://hdl.handle.net/10261/188519
The southwestern margin of the Iberian Peninsula, which includes the Gulf of Cadiz, is characterized by a present -day active deformation mainly driven by the NW-SE trending convergence (3.8-5.6 mm.yr-1) between the Nubia and Eurasia plates. The SW Iberian margin is a seismogenic area characterized by low to moderate magnitudes (Mw ≤ 5.5). In addition, this area hosts some of the largest earthquakes occurred in Western Europe, such as the 1st of November 1755 Lisbon Earthquake and tsunami (Mw ≥ 8.5). The active fault structures can be classified in two main families: a) WNW-ESE trending dextral strike-slip faults, and b) NE-SW trending thrusts faults. To characterize the seismogenic and tsunamigenic potential of each fault system, we develop several tsunami models. The workflow involves the following tasks: 1. Interpretation of the seismic profiles (in time) defining the traces of main active faults; 2. Mapping the trace of the faults using multibeam bathymetry; 3. Mesh of the fault surface and their respective horizons to generate a 3D model of the subsurface for each fault; 4. Conversion of the 3D model from time-to-depth assigning a velocity value (i.e. from available velocity models of the area) to the interval between horizons; 5.Defining the specific attributes for each fault, such as Length, Width, Depth, Strike, Dip and Rake; 6. Determine the maximum magnitude and slip for each fault. The maximum magnitude should be compatible with the length and the width previously defined, so we use the Leonard (2014) scaling-law; 7. Finally, the tsunami simulations for each fault have been run using “Tsunami-HySEA” software. We run two simulations for each fault, the first one considering the fault as an inclined planar surface and the second simulations used the 3D mesh
eng
openAccess
Tsunamigenic structures in the Gulf of Cadiz and the workflow for tsunami hazard assessment
comunicación de congreso
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URL
https://digital.csic.es/bitstream/10261/188519/1/Sanchez_Serra_et_al_2019.pdf
File
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01525768464f25213862fd1ac051a923
878279
application/pdf
Sanchez_Serra_et_al_2019.pdf