Magnitude 7.5 quake in northern Japan injures 23 people and triggers a tsunami

TOKYO — A powerful magnitude 7.5 earthquake struck off northern Japan late Monday, injuring more than 20 people and triggering a tsunami of up to 28 inches in Pacific coast communities, officials said.

The Japanese government was still assessing damage from the tsunami and late-evening quake, which struck about 11:15 in the Pacific Ocean about 50 miles off the coast of Aomori, the northernmost prefecture of Japan’s main Honshu island.

“I’ve never experienced such a big shaking,” convenience store owner Nobuo Yamada told the public broadcaster NHK in the Aomori prefecture town of Hachinohe, adding that “luckily” power lines were still operating in his area.

A tsunami of 2.3 feet was measured in Kuji port in Iwate prefecture, just south of Aomori, and tsunami levels of up to 1.6 feet struck other coastal communities in the region, the Japan Meteorological Agency said.

The Fire and Disaster Management Agency said 23 people were injured, including one seriously. Most of the victims were hit by falling objects, NHK reported, adding that several people were injured in a hotel in Hachinohe and a man in Tohoku was slightly hurt when his car fell into a hole.

The meteorological agency reported the quake’s magnitude as 7.5, down from its earlier estimate of 7.6. It issued an alert for potential tsunami surges of up to 10 feet in some areas and later downgraded it to an advisory.

Chief Cabinet Secretary Minoru Kihara urged residents to go to higher ground or seek shelter until advisories were lifted. He said about 800 homes were without electricity, and that the Shinkansen bullet trains and some local lines were suspended in parts of the region.

Nuclear power plants in the region were conducting safety checks, Kihara said. The Nuclear Regulation Authority said about 118 gallons of water spilled from a spent fuel cooling area at the Rokkasho fuel reprocessing plant in Aomori, but that its water level remained within the normal range and there was no safety concern.

About 480 residents were taking shelter at the Hachinohe Air Base, and 18 defense helicopters were mobilized for a damage assessment, Defense Minister Shinjiro Koizumi said.

About 200 passengers were stranded for the night at New Chitose Airport in Hokkaido, NHK reported.

The meteorological agency issued a caution about possible aftershocks in the coming days. It said there is a slight increase in risk of a magnitude 8 level quake and possible tsunami occurring along Japan’s northeastern coast from Chiba, just east of Tokyo, to Hokkaido. The agency urged residents in 182 municipalities in the area to monitor their emergency preparedness in the coming week.

Satoshi Kato, a vice principal of a public high school in Hachinohe, told NHK that he was at home when the quake struck, and that glasses and bowls fell and smashed on the floor.

Kato said he drove to the school because it was designated an evacuation center, and on the way he encountered traffic jams and car accidents as panicked people tried to flee. Nobody had yet come to the school to take shelter, he said.

Prime Minister Sanae Takaichi, in brief comment to reporters, said the government set up an emergency task force to urgently assess the extent of damage. “We are putting people’s lives first and doing everything we can,” she said.

Later, she urged residents in the region to pay attention to the latest information from local municipalities. “Please be prepared so you can immediately evacuate as soon as you feel a tremor.”

The quake struck about 50 miles northeast of Hachinohe, and about 30 miles below the sea surface, the meteorological agency said.

It was just north of the Japanese coast that suffered the magnitude 9.0 quake and tsunami in 2011 that killed nearly 20,000 people.

Yamaguchi writes for the Associated Press.