J apan has issued a megaquake advisory after a magnitude 7.5 earthquake struck off the eastern coast of Aomori on Monday, raising concerns over a potentially larger quake in the coming days.

Although the damage from this event was modest, authorities believe the tremor may have temporarily increased the risk of a much stronger quake in the region.

What triggered the advisory?

The magnitude 7.5 earthquake hit just off Aomori, Japan’s northernmost prefecture on Honshu, and south of Hokkaido. Officials recorded 34 mostly mild injuries and some damage to buildings and roads.

Authorities stressed the advisory is not a prediction, noting “the probability of a magnitude 8 or larger quake is only about 1 per cent”. However, they hope the alert will act as a wake-up call to prepare for a catas

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