Is Japan bracing for another megaquake?

Japan’s meteorological agency is warning that a magnitude 7.5 tremblor off Aomori has temporarily raised the odds — estimated at 1 per cent — of an over 8.0 magnitude megaquake within a week. Government models show a worst-case offshore quake could generate 30-metre tsunamis, leave up to 199,000 dead, destroy 220,000 buildings, and cause $198 billion worth of damage across 182 municipalities in the north