IN BRIEF: What is known about powerful earthquake off Japan’s coast

TOKYO, April 20. /TASS/. A tsunami warning for waves up to three meters high was issued in Japan following a powerful earthquake that occurred in the Pacific Ocean east of the coast of the northeastern Tohoku Region, authorities reported.

TASS has compiled the key information known at this time.

- Seismologists at the Japan Meteorological Agency have raised the estimated magnitude of the earthquake in Japan to 7.7.

- Initially, they had estimated it at 7.4.

- The risk of powerful tremors as strong as the magnitude 7.5 earthquake that occurred east of Japan’s northeastern coast will persist for a week. A Japan Meteorological Agency spokesperson issued this warning during an emergency press conference.