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作 者:Benlong Wang Xiaoyu Guo Hua Liu Cheng Gong
机构地区:[1]Department of Engineering Mechanics [2]Ministry of Education Key Laboratory of Hydrodynamics [3]Chinese Aviation Radio and Electronic Research Institute (CARERI)
出 处:《Theoretical & Applied Mechanics Letters》2015年第5期187-190,共4页力学快报(英文版)
基 金:Supports by the Shanghai Leading Academic Discipline Project (No.B206);National Natural Science Foundation of China (No.11272210)
摘 要:A magnetic anomaly was recorded at Easter Island on 27 February 2010 during the Chile tsunami event. The physics of the magnetic anomaly is analyzed using kinematic dynamo theory. Using a single wave model, the space and time behavior of the magnetic field is given. By joint analysis of the magnetic observations, tide gauge data and numerical results of the global tsunami propagation, we show the close resemblance between the predicted spatial and temporal magnetic distributions and the field data, indicating the magnetic anomaly at Easter Island was actually induced by the motion of seawater under tsunami waves. Similarity between the field magnetic data at Easter Island during 2010 Chile tsunami and sea surface level is verified with realistic tsunami propagating model.A magnetic anomaly was recorded at Easter Island on 27 February 2010 during the Chile tsunami event. The physics of the magnetic anomaly is analyzed using kinematic dynamo theory. Using a single wave model, the space and time behavior of the magnetic field is given. By joint analysis of the magnetic observations, tide gauge data and numerical results of the global tsunami propagation, we show the close resemblance between the predicted spatial and temporal magnetic distributions and the field data, indicating the magnetic anomaly at Easter Island was actually induced by the motion of seawater under tsunami waves. Similarity between the field magnetic data at Easter Island during 2010 Chile tsunami and sea surface level is verified with realistic tsunami propagating model.
关 键 词:Magnetic anomalyTsunamiNonlinear shallow water equations
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