The 1911 Kikai Island earthquake (喜界島地震, Kikai-jima Jishin) occurred on June 15 at 23:26 local time (14:26 UTC). The epicenter of the earthquake was located near Kikai Island, Japan. It had a magnitude of Ms 8.1.[3]
The earthquake occurred near the northern end of the deepest region in Ryukyu Trench.[4] The hypocenter was located near 28.00°E, 130.00°N, about 30 km south of the Kikai Island, with a depth of about 100 km. However, due to the instrumental precision of that time, the location of the hypocenter was just an approximation, and estimations differ. A recent study estimated that the hypocenter was located near 28.90°E, 130.25°N, about 60 km NNE of the Kikai Island, with a depth of about 30 km.[5] In 2013, another study reevaluated the location and depth of the earthquake and found that its hypocenter depth was 10 km.[1] The reevaluation also relocated the epicenter location to 28.7°E, 130.6°N.
The earthquake triggered a tsunami which was recorded on Kikai Island and Amami Ōshima.[5] The tsunami was relatively small on the east coast of Kikai Island, but had a height of at least 5m on the west coast of Kikai Island and also in Amami Ōshima, and may have had a maximum height of over 10m in certain parts of Kikai Island.[10]
^ abGoto, Kazuhiko (2012). "Hypocenter of the 1911 great earthquake occurred around Kikai-jima, Japan". Japan Geoscience Union Meeting 2012. Japan Geoscience Union.
^"過去の被害地震". www.jma-net.go.jp. Archived from the original on 2014-04-14. Retrieved 2013-02-26.
^Iwamoto K, Kazuhiko G (2013). Oral survey of the tsunami generated by the 1911 great earthquake (M8.0) that occurred around Kikai-jima, Japan. Japan Geoscience Union Meeting (in Japanese), Makuhari, Chiba, 19–24 May 2013. "岩本健吾、後藤和彦：1911年に喜界島近海で発生した巨大地震(M8.0)に伴う津波の聞き取り調査"(PDF). 日本地球惑星科学連合2013年資料
