Japanese authorities have urged residents not to return to their homes in coastal areas and to avoid access to wider areas, as, despite the downgrading of the tsunami warning, the risk of “deadly waves” after the 7.6-magnitude mega-earthquake still exists.

Earlier, the coastal areas were hit by a one meter tsunami.

After the 7.6-magnitude earthquake, at least 12 strong aftershocks have been recorded on the west coast of Japan, especially on the island of Honshu. The damage that has been caused is significant, but at least for now, there is no recorded death.

At least six houses were damaged by the quakes, and there are people trapped in rubble, government spokesman Yoshimasa Hayashi said. A fire broke out in the city of Wajima, Ishikawa Prefecture, and power had been cut to more than 30,000 households, he added.

The agency initially issued a major tsunami warning for Ishikawa and lower-level tsunami warnings for the rest of Honshu island’s west coast, as well as the northernmost of its main islands, Hokkaido.

The warning was downgraded to a normal tsunami several hours later, meaning waters could reach as high as 3 meters (10 feet).