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A tsunami warning has been issued following a strong quake off northeast coast of Japan.

An earthquake with a preliminary magnitude of 6.7 has hit Japan’s northeastern region, prompting a tsunami advisory from the Japan Meteorological Agency (JMA).

The earthquake struck on Friday off the coast of Aomori Prefecture at 11:44am local time (02:44 GMT) at a depth of 20km (12.4 miles), according to the JMA.

The United States Geological Survey (USGS) also said that the quake measured 6.7.

Japan’s Nuclear Regulation Authority said there were no immediate signs of abnormalities at the region’s nuclear facilities.

National broadcaster NHK said that the level of shaking from the quake was less than a bigger magnitude 7.5 earthquake that hit in the same region on Monday and tore apart roads, smashed windows and triggered tsunami waves of up to 70 centimetres (2.3ft).

Following Monday’s quake, which injured at least 50 people, the JMA issued a rare special advisory warning to residents across a wide area, from Hokkaido in the north to Chiba, east of Tokyo, to be on alert for an increased possibility of a powerful earthquake hitting again within a week.

The northeast region is haunted by the memory of a massive magnitude 9.0 undersea quake in 2011, which triggered a tsunami that left about 18,500 people dead or missing.

The JMA issued its first special advisory in 2024 for the southern half of Japan’s Pacific coast warning of a possible “megaquake” along the Nankai Trough.

The government has said that a quake in the Nankai Trough and subsequent tsunami could kill as many as 298,000 people and cause up to $2 trillion in damages.

Japan sits on top of four major tectonic plates along the western edge of the Pacific “Ring of Fire” and is one of the world’s most seismically active countries.