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  • 杉田 尚男, 田澤 祥江, 三浦 芽依, 片岡 俊一
    八戸工業高等専門学校紀要
    2017年 51 巻 133-138
    発行日: 2017年
    公開日: 2018/10/31
    研究報告書・技術報告書 フリー
    Japan has had a long history of earthquakes and seismic activities. It is an area of high seismicity because of its location near three major tectonic plate boundaries, and is situated on the Pacific Ring of Fire. 20% of the most dangerous earthquakes of the World occurred there. The 11 March 2011 at 5:46 pm a big earthquake occurred with an 8.9 magnitude. It was the biggest earthquake recorded since 1923. In April 2016, a big Earthquake occurred also. My project is to study all the point of impact of the earthquake and its aftershocks. Earthquake of magnitude 6.2 occurred on April 14.Furthermore earthquake of magnitude 7.0 occurred in the two days after. It was a very rare case that the main shock occurs after the foreshock. In this study, We have studied about the direction of earthquake motions.
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