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Agence France-Presse

A powerful earthquake struck off the coast of northern Japan on Friday, the weather office said, days after an even larger tremor shook the region and injured at least 50.
The Japan Meteorological Agency (JMA) upgraded Friday’s quake to a 6.7 magnitude and warned that tsunami waves of up to one metre (three feet) could hit the northern Pacific coastline.
In the end, waves of up to 20cm (7 inches) were recorded on the main northern island of Hokkaido and in the Aomori region, the JMA said, before the tsunami advisory was lifted.
Broadcaster NHK said there was no obvious change at either of the ports where the waves hit.
The United States Geological Survey also said that the quake measured 6.7 and was 130km (81 miles) off the city of Kuji in Iwate prefecture on the main island of Honshu.
NHK said that the level of shaking was less than the bigger 7.5 tremor late on Monday, which knocked items off shelves, tore apart roads, smashed windows and triggered tsunami waves of up to 70cm.
The Nuclear Regulation Authority said on Friday there were no immediate signs of abnormalities at the region’s nuclear facilities.


Following Monday’s tremor, the JMA had published a rare special advisory warning that another quake of similar or greater size was possible for another week.
The advisory covered the Sanriku area on the northeastern tip of Japan’s main island of Honshu and the northern island of Hokkaido, facing the Pacific.
The region is haunted by the memory of a massive 9.0 magnitude undersea quake in 2011, which triggered a tsunami that left around 18,500 people dead or missing.
In August 2024, the JMA issued its first special advisory for the southern half of Japan’s Pacific coast warning of a possible “megaquake” along the Nankai Trough.
The 800km (500 miles) undersea trench is where the Philippine Sea oceanic tectonic plate is “subducting” – or slowly slipping – underneath the continental plate that Japan sits atop.

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 US$2 trillion in damages.
The JMA lifted last year’s advisory after a week, but it led to panic buying of staples like rice and prompted holidaymakers to cancel hotel reservations.
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 tectonically active countries.
The archipelago, home to around 125 million people, experiences around 1,500 jolts every year.
The vast majority are mild, although the damage they cause varies according to their location and depth below the Earth’s surface.


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Japan

Japan lifts tsunami warning after magnitude 6.7 earthquake

Collapsed bookshelves at a high school library in Hachinohe City in Aomori prefecture on Tuesday following a 7.5 magnitude earthquake off northern Japan. Photo: JIJI Press/AFP

Workers gather at a collapsed road in the quake-hit Aomori prefecture’s Tohoku on Tuesday. Photo: EPA/JIJI Press

30 injured after magnitude 7.5 quake in Japan, warning of more stronger tremors

A vehicle sits on a damaged road in Tohoku town, Japan’s Aomori prefecture, on Tuesday. Photo: Kyodo News via AP

Bookshelves and documents that fell during an earthquake at Kyodo News’ Hakodate bureau in Hakodate, Japan’s Hokkaido on Monday. Photo: Kyodo/Reuters

Japan issues megaquake advisory after magnitude 7.5 Aomori quake

A vehicle rests on the edge of a collapsed road in Tohoku town in Aomori Prefecture on Tuesday following a 7.5 magnitude earthquake. Photo: AFP

A fire broke out after an earthquake in Aomori City, Japan on Tuesday. Photo: AFP

A worker cleans up inside a commercial facility in Hachinohe in Aomori Prefecture, Japan on Tuesday. Photo: Kyodo/Reuters

News

Asia

East Asia

The weather office said waves of up to 20cm were recorded on the main northern island of Hokkaido and in the Aomori region


The weather office said waves of up to 20cm were recorded on the main northern island of Hokkaido and in the Aomori region.


Earthquakes

Natural disasters

Japan Meteorological Agency (JMA)

Japan lifts tsunami warning after magnitude 6.7 earthquake

.css-1c6uqr6{color:inherit;font-weight:inherit;font-size:inherit;font-family:inherit;line-height:inherit;overflow-wrap:break-word;}The weather office said waves of up to 20cm were recorded on the main northern island of Hokkaido and in the Aomori region

The weather office said waves of up to 20cm were recorded on the main northern island of Hokkaido and in the Aomori region