Japan Volcano Erupts 'Five Times Bigger' Than Before 4.70K Jeff Neumann 02/01/11 07:41AM Filed to: Volcanoes Volcanoes Japan Disasters Shinmoedake Video The Shinmoedake volcano in Japan erupted again today, with experts saying it was "five times" more powerful than last week's eruption. The force of the explosion blew out windows five miles away and nearby residents have been urged to leave.