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Powerful but deep quake strikes off Japan; no tsunami warning issued, 2 injured but no damage

Map locates an earthquake in the Pacific off Japan.
Image Credit: AP Photo/ESRI
May 30, 2015 - 12:56 PM

TOKYO - A powerful earthquake struck near remote Japanese islands and shook most of the country Saturday evening, but it occurred well beneath the earth's surface and did not trigger a tsunami warning. Several people suffered non-life-threatening injuries, and there were no reports of deaths or major damage.

The magnitude-8.5 offshore quake struck off the Ogasawara islands at a depth of 590 kilometres (370 miles), the Japan Meteorological Agency said. The U.S. Geological Survey said the quake had a magnitude of 7.8 and a depth of 678 kilometres (421 miles).

The temblor was powerful enough to rattle most of Japan, from the southern islands of Okinawa to Hokkaido in the north. It caused buildings to sway in Tokyo — about 1,000 kilometres (620 miles) north of the Ogasawara islands — and temporarily disrupted some train services in the city. About 400 houses in Saitama prefecture, just north of the capital, were without power, according to the Tokyo Electric Power Co.

At Tokyo's Roppongi Hills shopping and business complex, elevators stopped soon after the earthquake struck the area, forcing hundreds of visitors to climb down the stairs. Among them were about 200 people who came to see the Star Wars exhibit on the 52nd floor.

In Saitama, a woman in her 70s sustained a minor head injury when a ceramic plate fell from a cupboard, local police said. In Kawasaki, just south of Tokyo, a 56-year-old office worker fell down when the quake caught him by surprise and suffered a rib injury, according to Japanese public broadcaster NHK.

Yoshiyuki Sasamoto, a municipal official on Chichijima island, which is part of the Ogasawara island group, told NHK that he initially felt a mild tremor, but when he thought it was over "there was a violent shaking and I couldn't even stand on my feet."

At an inn on the Ogasawara island of Hahajima, furniture shook violently, although nothing fell or broke, innkeeper Michiko Orita told NHK. "It was so frightening. The entire house shook and a Buddhist altar violently swayed like I have never experienced before," she said, adding that all her guests were safe.

The meteorological agency did not issue a tsunami warning because the quake struck so far beneath the earth's surface. Deep offshore earthquakes usually do not cause tsunamis, and generally cause less damage than shallow ones.

In March 2011, a magnitude-9.0 earthquake rocked northeastern Japan, triggering a tsunami that killed more than 18,500 people and ravaged much of the northern Pacific coast. The depth of that quake was just 24 kilometres (15 miles), according to the meteorological agency.

News from © The Associated Press, 2015
The Associated Press

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