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BREAKING: Magnitude-7.1 earthquake strikes off Alaskan coast

A major earthquake struck early Sunday morning off the Alaskan coast, the United States Geological Survey said.

The 7.1-magnitude temblor hit at 1:30 a.m. AKST Sunday (5:30 a.m. EST Sunday), the USGS said. Its epicenter was located 52 miles east of Old Iliamna, Alaska. It had an initial magnitude of 6.4.

The earthquake was felt in Anchorage and caused power outages in the region, according to utility and media reports. At least 10,000 customers were without electricity in the Anchorage area, utilities reported.

Anchorage firefighters have responded to numerous reports of gas odors, alarm systems sounding and broken water lines, the department said on its Twitter feed.

The earthquake caused several outages in Willow and several other feeder outages, especially impacting the Palmer area, the Matanuska Electric Association said on its Facebook page. Crews have been called to assess the situation and restore power.

No tsunami was expected along the U.S. West Coast or in the Pacific Basin, the National Tsunami Warning Center said on its website. There have been at least 15 aftershocks since the major quake, the Alaska Earthquake Center at the University of Alaska, Fairbanks, reported.

Canadian officials also said no tsunami was expected on the British Columbia coast.

Seismographs in Norway picked up the movement from the Alaskan quake, according to a Norwegian seismologist.

The largest recorded earthquake in the Anchorage area was a 9.2-magnitude temblor, which generated a massive tsunami in March 1964. More than 130 people died in the earthquake and tsunami.