A television shows a news report on Japan Meteorological Agency's tsunami warning Monday, saying the agency expects tsunami waves of up to three meters (9.8 feet) to reach coastal areas in northeastern Japan.
Issei Kato/Reuters
See all topics Email Link Copied!

The Japanese government has warned of a slightly heightened risk of a megaquake in the next week after a strong 7.4-magnitude earthquake struck off the country’s northeastern coast on Monday, triggering a tsunami warning, according to the Japan Meteorological Agency and the US Geological Survey.