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Effects of the October 25, 2010, Mentawai tsunami in La Réunion Island (France): observations and crisis management

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  • Alexandre Sahal
  • Julie Morin

Abstract

On October 25, 2010, a Mw = 7.7 magnitude earthquake was recorded in the Kepulauan Mentawai archipelago, in Indonesia. Following the earthquake, the Pacific Tsunami Warning Center issued a tsunami bulletin to the countries of the Indian Ocean informing them that a local tsunami watch was in effect for Indonesia. La Réunion Island, a French territory located 5,000 km southwest of the seismic source, did not trigger its tsunami early warning protocol, but did suffer the impact of this tsunami 7h20 post-earthquake. This paper presents the post-tsunami survey conducted in La Réunion Island a few days after the event, providing run-up measurements that reach 1.72 m locally as well as information about the material losses and the crisis management. It provides a time sequence of the observations along the coast and the reactions of the population and authorities in dealing with this crisis. This paper also shows the local authorities’ lack of action in managing this event—thus increasing human and material vulnerabilities—the consequences for victims and the impact on the credibility of the local early warning system. These results provide geophysicists with information to better describe the source of this tsunami through far-field inversion and provide local decision makers with a comprehensive assessment of the weaknesses of the local early warning system and protocols. Copyright Springer Science+Business Media B.V. 2012

Suggested Citation

  • Alexandre Sahal & Julie Morin, 2012. "Effects of the October 25, 2010, Mentawai tsunami in La Réunion Island (France): observations and crisis management," 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. 62(3), pages 1125-1136, July.
  • Handle: RePEc:spr:nathaz:v:62:y:2012:i:3:p:1125-1136
    DOI: 10.1007/s11069-012-0136-2
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    References listed on IDEAS

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    1. Mark Darienzo & Al Aya & George Crawford & David Gibbs & Paul Whitmore & Tyree Wilde & Brian Yanagi, 2005. "Local Tsunami Warning in the Pacific Coastal United States," 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. 35(1), pages 111-119, May.
    2. Lori Dengler, 2005. "The Role of Education in the National Tsunami Hazard Mitigation Program," 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. 35(1), pages 141-153, May.
    3. C. Jonientz-Trisler & R. Simmons & B. Yanagi & G. Crawford & M. Darienzo & R. Eisner & E. Petty & G. Priest, 2005. "Planning for Tsunami-Resilient Communities," 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. 35(1), pages 121-139, May.
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    Cited by:

    1. Takahito Mikami & Tomoya Shibayama & Miguel Esteban & Koichiro Ohira & Jun Sasaki & Takayuki Suzuki & Hendra Achiari & Teguh Widodo, 2014. "Tsunami vulnerability evaluation in the Mentawai islands based on the field survey of the 2010 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. 71(1), pages 851-870, March.

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