At least 10 people were reported injured on Tuesday but there appeared to be no major damage after a big quake rocked northern Japan and triggered tsunami waves up to 70 centimetres (28 inches) high.

But the Japan Meteorological Agency also said the magnitude 7.6 quake which struck at 11:15 pm on Monday (1415 GMT) off the coast of the Aamori region raised the chances of similar or larger tremors in the coming days.

The injured included one person seriously hurt in the main northern island of Hokkaido, according to the Fire and Disaster Management Agency.

In Hokkaido, an AFP reporter said the ground shook violently for around 30 seconds as smartphone alarms rang to alert residents.

Live footage showed shattered glass fragments scattered across roads.

Some 2,700 homes in Aomori were wit

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