Magnitude 5.4 earthquake in Tokyo Bay Posted on July 3, 2012 by doug I felt that one! It was long and rolling, M5.4 centered in Tokyo Bay, near Chiba. It was very deep though, so just a 4 out of 7 on the Japanese shindo scale. Post navigation ← Temperature climbing in No. 4 reactor’s pool after cooling system knocked out Q&A about the Affordable Care Act (Obamacare) → Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Notify me via e-mail if anyone answers my comment.