山形県沖を震源とする地震における地震動平均方向の検討

抄録

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 June 2019, a big Earthquake occurred also.My project is to study all the point of impact of the earthquake. Earthquake of magnitude 6.7 occurred on June 18. In this study, We have studied about the direction of earthquake motions．