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Title

Tsunami generation potential of a strike-slip fault tip in the westernmost Mediterranean

AuthorsEstrada, Ferran CSIC ORCID CVN ; González-Vida, J.M.; Peláez Montilla, José A.; Galindo-Zaldívar, Jesús; Ortega-Acosta, S.; Macías, Jorge; Vázquez, J. T.; Ercilla, Gemma CSIC ORCID
Issue DateAug-2021
PublisherNature Publishing Group
CitationScientific Reports 11:16253 (2021)
AbstractTsunamis are triggered by sudden seafloor displacements, and usually originate from seismic activity at faults. Nevertheless, strike-slip faults are usually disregarded as major triggers, as they are thought to be capable of generating only moderate seafloor deformation; accordingly, the tsunamigenic potential of the vertical throw at the tips of strike-slip faults is not thought to be significant. We found the active dextral NW–SE Averroes Fault in the central Alboran Sea (westernmost Mediterranean) has a historical vertical throw of up to 5.4 m at its northwestern tip corresponding to an earthquake of Mw 7.0. We modelled the tsunamigenic potential of this seafloor deformation by Tsunami-HySEA software using the Coulomb 3.3 code. Waves propagating on two main branches reach highly populated sectors of the Iberian coast with maximum arrival heights of 6 m within 21 and 35 min, which is too quick for current early-warning systems to operate successfully. These findings suggest that the tsunamigenic potential of strike-slip faults is more important than previously thought, and should be taken into account for the re-evaluation of tsunami early-warning systems
Description9 pages, 4 figures, 4 supplementary videos, supplementary information https://doi.org/10.1038/s41598-021-95729-6
Publisher version (URL)https://doi.org/10.1038/s41598-021-95729-6
URIhttp://hdl.handle.net/10261/248055
DOI10.1038/s41598-021-95729-6
E-ISSN2045-2322
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