Quake advisory issued in Northern Japan
Japan has been “on alert” for a “possible mega quake,” Japanese broadcaster NHK reported, following a magnitude 7.5 tremor in northern regions. This has also led to warnings of a tsunami. The earthquake, authorities said, hit the eastern coast of Aomori Prefecture with a depth of 54 kilometres.
The city of Hachinohe recorded tremors of “upper 6” on Japan’s intensity scale of 0 to 7. Authorities have also reported 33 people injured.
The quake produced long-period ground motions, according to NHK, which it said are “slow, wide-swinging seismic waves that can significantly impact high-rise buildings.” In some places, it added, “they were strong enough to make it difficult for people in high-rises to remain standing.”
Tsunami warnings were initially issued for Iwate Prefecture and parts of Hokkaido and Aomori, before being later downgraded to advisories. The advisories were lifted on Tuesday morning. Tsunamis of 70cm or less were observed in “multiple locations.”
The Japan Meteorological Agency (JMA) reported a “major tremor” of magnitude 8 or higher as being a possibility in areas from Hokkaido to Chiba Prefecture. It is the first issued for the area since the mega-quake warning category was introduced in 2022.
People are being urged by authorities to check evacuation routes, make sure home furniture has been secured, and have an emergency kit with food, water, and portable toilets prepared. No evacuation recommendation has been issued but people are advised to remain vigilant into next week.
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