Japan warns of slightly increased risk of mega-quake after a 7.7-magnitude one
Japan warns of slightly increased risk of mega-quake after a 7.7-magnitude one
apnews.com
Earthquake sets off brief tsunami alert and a megaquake advisory in northern Japan
A 7.7 magnitude earthquake Monday off northern Japan sparked a short-lived tsunami alert and an advisory of a slightly higher risk of a possible megaquake.
