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Analysis of Ship Refuge Action in Tsunami Using ais.Data： Case of the 2011 East Japan Earthquake and Tsunami

Journal of Shipping and Ocean Engineering 2012年第6期2卷 380-385页

作者： HidenariMakino Organization of Advanced Science and Technology Kobe University Hyogo Kobe 658-0022 Japan

A massive earthquake occurred in the Tohoku and Kanto regions of Japan on the 1 lth of March 2011. In response, a tsunami alert, a tsunami warning and an advisory were issued for the entire Pacific coast region. This research investigates the evacuation behavior of ships by ais.（automatic identification system） data in Onahama port after the tsunami warning was issued. The unusual behavior observed was attributed to the emergency evacuation of ships. This research investigates the evacuation behaviors of the vessels using the data obtained from ais. around the Onahama Port during alerting the major tsunami warning. The result shows that most vessels in the port started evacuating approximately 10 min after the major tsunami warning and completed offshore evacuation 40 min after this warning. This contributed in understanding the actual status of the vessel evacuation. In addition, the travel paths of each vessel revealed the influence of the tsunami on the vessels. Furthermore, the exceptional situation where several vessels moved in the same direction at the speed almost same for about 2 hours was confirmed. As a result, it can be estimated that the waves that affected both vessels were the drawback of the tsunamis.

关键词： Great east Japan earthquake tsunami ship evacuation ais.

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Verification of the Time Tsunami Attacked Coasting Ships Using ais.Case of the 2011 Japan Tsunami

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Journal of Earth Science and Engineering 2013年第2期3卷 126-130页

作者： Hidenari Makino MDK Lab 2-15 Matsunouchi Ashiya City 659-0094 Hyogo Japan

This research aims to elucidate the navigational situation of ships during the massive tsunami that occurred in the Tohoku district of Japan on March 11,2011. In particular, it focuses on the time the massive tsunami encountered ships. ais.（automatic identification system）, which is required to be fitted aboard large ships for identifying and locating vessels, was used for the analysis of the navigational status of ships. It was confirmed that a group of ships sailing off the coast suddenly changed course. It was also verified that the ships had been struck by the tsunami, and the time of the strike was identified. The novelty and importance of this research are as follows. First, the behaviour of many ships that encountered the massive tsunami was clarified. There are no earlier instances of simultaneous and detailed recording of the behaviour of many ships encountering a massive tsunami. Second, the movement of the ships that encountered the tsunami was analysed, and the time of the maximum wave of the tsunami was verified. The research presents, for the first time in ship history, the status of a ship at the time of a tsunami using objective navigational data.

关键词： Great East Japan earthquake tsunami ship evacuation ais.

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