Japan earthquake mapped: Country on high alert for megaquake after tsunami warnings
A 7.7-magnitude earthquake struck off Japan's northeastern coast, prompting tsunami warnings and advisories, which were later lifted. Authorities warned of a heightened risk of a megaquake for up to a week.
A powerful 7.7-magnitude earthquake struck off Japan's northeastern coast on Monday, prompting tsunami warnings and advisories along the country's coast. The Japanese Meteorological Agency issued the second-highest alert, expecting waves of between one and three metres. The tsunami warnings and advisories were later lifted, with the highest tsunami waves recorded at around 80cm in Iwate prefecture. Authorities warned that the risk of another, more powerful earthquake remains for up to a week. The Japan Meteorological Agency said the chances of a larger earthquake of magnitude 8 or greater were 10 times higher than usual. The government has recommended people have a go-bag ready and check their preparations amid the warning of a heightened risk of a megaquake.
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