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Newsday article...7.8 quake
Tokyo -- A strong quake with a preliminary magnitude of 7.8 rocked the northern Japan island of Hokkaido early Friday morning, knocking out power, derailing a train and touching off an industrial fire. Two people were reported injured.
The government warned local residents to avoid coastal areas due to the possibility of tsunami, or ocean waves caused by seismic activity.
The quake was strong enough to rock buildings on the island and shake books and other objects off shelves. Japan's public broadcaster NHK reported that at least several people had been injured and a fire had broken out in the city of Tomakomai.
Black plumes of smoke and flames could be seen leaping from the site in an industrial area. Streams of water were aimed at the flames.
Television footage showed an office in which books were knocked off shelves, and desks and computers swayed back and forth.
Japan's Meteorological agency warned that waves of up to 3 feet were expected to hit coastal areas. The quake, which hit just before dawn, was focused off Hokkaido's eastern shore.
Tsunami of up to 1 foot were observed in some coastal cities, NHK reported.
"We are now trying to collect information on the extent of the damage," city official Sadayuki Kano said. "There are no reports of other major damage."
NHK also reported that a local train derailed, injuring two people.
The meteorological agency said the earthquake had a magnitude of 7.8 and was focused 36 miles under the seabed.
The U.S. Geological Survey in Golden, Colo., said the temblor had a preliminary magnitude of 8.
The quake struck in the Pacific Ocean, about 65 miles south-southwest of Kushiro and 495 miles north-northeast of Tokyo, said John Minsch, a USGS geophysicist. The quake was shallow.
"That makes it more likely to be a tsunami, and there's most likely to be a great amount of damage," Minsch said.
Hokkaido is the northernmost and most sparsely populated of Japan's major islands. Sapporo is the prefecture's capital.
Geophysicist Doug Given in Pasadena, Calif., said the region is "part of the Pacific Ring of Fire, the zone of very large earthquakes and volcanoes that rings the Pacific Rim."
The USGS had no immediate reports of casualties.
A tsunami advisory was issued for Hawaii and a warning was issued for parts of Alaska.