Japan risks 199,000 deaths in overdue megaquake amid fresh tremor swarm

A cluster of tremors off Japan’s northeastern coast has raised alarms among seismologists, as a new government study warns that up to 199,000 people could be killed if a magnitude 9 earthquake strikes. The most recent quake, a magnitude 4 offshore tremor recorded on Monday morning off eastern Hokkaido, was small and caused no reported damage. Yet authorities are urging residents to remain vigilant and review their evacuation plans after a succession of smaller offshore quakes in recent days off...