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Potential for landslide-related tsunami in the Dover Strait area (English Chanel) based on numerical modelling

Abstract : Although earthquakes and tsunamis are less frequent in the Dover Strait than over active subduct ion zones, a plausible potential exists for intraplate earthquakes of magnitude Mw=6.9 generating a tsunami with damaging consequences. In April 1580, an earthquake shook the region violently and destructions were reported as far as London in the north and Rouen in the south. Despite fair weather conditions, a series of abnormal sea waves was reported in several harbours (Calais, Boulogne and Dover) on the same day . A first step was to produce a range of numerical coseismic tsun ami simulations and to compare them with historical witness accounts. Results raise the question of whether such earthquakes could also trigger chalk flow - generated tsunamis along cliff lines on both sides of the Strait. Gravity - driven collapses affect the chalk cliffs periodically, but local tsunami waves caused by very large mass movements could reach heights of several met er s and, for example, strike Dover .
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https://halshs.archives-ouvertes.fr/halshs-01291496
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Submitted on : Monday, March 21, 2016 - 3:39:50 PM
Last modification on : Tuesday, November 16, 2021 - 5:05:18 AM

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  • HAL Id : halshs-01291496, version 1

Citation

J. Rogers, Yanni Gunnell, Yann Krien, P. Ray. Potential for landslide-related tsunami in the Dover Strait area (English Chanel) based on numerical modelling. Proceedings of the 15th World Conference on Eaerthquake Engineering, 2012, 2012, Lisbonne, Portugal. 7 p. ⟨halshs-01291496⟩

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