Japan on Edge: Megaquake Advisory Tests Coastal Preparedness
A Sudden Alert After a Violent Night Japan was jolted into heightened vigilance this week after the government issued an unusually rare “megaquake advisory”—a step taken only when seismic activity hints at the possibility of a far larger event. The trigger was a magnitude-7.5 offshore earthquake near Aomori that injured dozens and rattled northern Honshu…



