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Cosmogenic tsunamic risk assessment: a first application to the European Atlantic coasts

Author

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  • Damien Violeau

    (EDF R&D/LNHE
    Laboratoire d’Hydraulique Saint-Venant)

Abstract

We address the question of cosmogenic tsunamis, i.e., tsunamis due to the fall of an asteroid in the ocean, in particular on the Atlantic coasts of Europe. We apply Ward and Asphaug's method (Deep-Sea Res II 49:1073–1079, 2002) for assessing this probabilistic return period of tsunami waves, with simplifying assumptions allowing writing their results in the form of analytic formulae, some of them involving simple integrals to be computed by numerical quadrature. We also account for uncertainties, (still following Ward and Asphaug (Deep-Sea Res II 49:1073–1079, 2002) on a simplified line. An upper bound of continental shelf shoaling is estimated ad hoc. The influence of several parameters is also analyzed, in particular the effect of tide is briefly addressed.

Suggested Citation

  • Damien Violeau, 2021. "Cosmogenic tsunamic risk assessment: a first application to the European Atlantic coasts," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 105(1), pages 735-753, January.
    • Handle: RePEc:spr:nathaz:v:105:y:2021:i:1:d:10.1007_s11069-020-04334-9
    DOI: 10.1007/s11069-020-04334-9
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    References listed on IDEAS

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    1. Steven Chesley & Steven Ward, 2006. "A Quantitative Assessment of the Human and Economic Hazard from Impact-generated Tsunami," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 38(3), pages 355-374, July.
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