Powerful 7.5-magnitude earthquake strikes off Japan, tsunami alert issued

An official of the Japan Meteorological Agency speaks near a monitor showing a tsunami alert during a news conference at the agency in Tokyo, Monday, April 20, 2026, after an earthquake that struck off the northern Japanese coast. (Masanori Kumagai/Kyodo News via AP)

TOKYO (AP) — Japan on Monday issued an advisory for northern coastal areas for an increased risk of a possible mega-quake induced by a major quake earlier in the day.

The Cabinet Office and the Japan Meteorological Agency said there is 1% chance for a mega-quake occurring on the northern Japanese coast in the next week or so following the powerful quake earlier Monday near the Chishima trough.

The Associated Press