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Why Do Giant Earthquakes Occur at Lunar Phases Specific to Each Subduction Zone ?

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タイトル: Why Do Giant Earthquakes Occur at Lunar Phases Specific to Each Subduction Zone ?
著者: Fujii, Yoshiaki 著作を一覧する
Ozaki, Yuki 著作を一覧する
Fukuda, Daisuke 著作を一覧する
Kodama, Jun-ichi 著作を一覧する
キーワード: Giant earthquakes
Lunar phase
Subduction zone
Stress rate
Strike
発行日: 2013年 8月20日
出版者: The 6th International Symposium on In-situ Rock Stress
誌名: Proceedings of the 6th International Symposium on In-situ Rock Stress
巻: 2013
開始ページ: RS2013-1021
抄録: To clearly show the dangerous lunar phases during which giant earthquakes tend to occur at each subduction zone and to clarify the mechanisms of giant earthquake occurrences during neap tides at some subduction zones, the folded and double-folded lunar phase is introduced. The dangerous lunar phases for each subduction zone, represented as delays from spring tides, are 1 to 4 days for Peru, 3 to 5 days for Indonesia, 5 to 7 days for Tonga, 3 to 8 days for Japan, 8 to 11 days for Kuril, -3 to 0 days for Chile, -2 to 0 days for New Guinea, and -2 to 0 days for Alaska. Paying sufficient attention to foreshocks and various precursors such as GPS (Global Positioning System) anomalies during the dangerous lunar phase for each subduction zone will be a very useful way to reduce damage from giant earthquakes. The influence of the solid tidal stress on reverse faulting was investigated based on the strike of subduction zones, and prohibition of giant earthquakes caused by strength increase due to the rapid variation in tidal stress during spring tides at NS subduction zones was proposed as one reason why giant earthquakes occur not only at spring tides but also at neap tides at some subduction zones.
記述: The 6th International Symposium on In-situ Rock Stress, August 20-22, 2013, Sendai , JAPAN
資料タイプ: proceedings (author version)
URI: http://hdl.handle.net/2115/53633
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 藤井 義明

 

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