Effects of the October 25, 2010, Mentawai tsunami in La R茅union Island (France): observations and crisis management
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- 作者：Alexandre Sahal (1) alexandre@sahal.fr
Julie Morin (2) - 关键词：Mentawai tsunami – ; Crisis management – ; Early warning system – ; La R茅union Island
- 刊名：Natural Hazards
- 出版时间：July 2012
- 出版年：2012
- 期刊代码：33_0921030X
- 类别：soc
- 卷：62
- 期：3
- 页码：1125-1136
- 数据来源：sp
摘要
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 R茅union 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 R茅union 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.