12:08 12/8/2025 2011 Great East Japan Earthquake Precursor earthquake 7.3 Main quake 9.1 0 (0) I heard that a magnitude 7.3 earthquake occurred a month before the Great East Japan Earthquake in March 2011, so we need to be careful for the next month. How useful was this post? Click on a star to rate it! Submit Rating Average rating 0 / 5. Vote count: 0 No votes so far! Be the first to rate this post.