William here - some have asked about volcanic activity at Aso. There was an extremely small-level eruption from 08:00 on Saturday, but it appears unrelated to the quake. The Japan Meterological Agency has not changed its current status of Level 2 (second-lowest concern). Looks like that’s one less thing to worry about. http://www3.nhk.or.jp/news/html/20160416/k10010483081000.html