M7.5 quake hits off Alaska, tsunami alert issued

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No tsunami threat is expected in Washington state following a 7.5-magnitude quake Monday in Alaska, the Washington State Department of Natural Resources says.

The magnitude 7.5 tremor struck 91 kilometres southeast of Sand Point, Alaska.

The quake occurred at 12.55pm on Monday (local time) off the Alaska peninsula and initially triggered a tsunami warning along the coastal areas.

A major 7.4 magnitude natural disaster was reported in Alaska today.

Across the Gulf of Alaska, authorities in British Columbia, Canada also said they were assessing the tsunami risk, asking residents to stand by for updates should they be asked to evacuate.

"You kind of always wait for it to build more, but it just lasted and trailed off", he said.

Sand Point is located on the northwest range of Popof Island.

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The quake was registered some 55 miles (90km) south of Sand Point, Alaska on Monday, at a depth of almost 25 miles (40km).

Tsunami arrival times were estimated for Sand Point at around 1:55 p.m., Cold Bay at 2:45 p.m., and Kodiak at 2:50 p.m., said the National Weather Service.

Public safety officials in King Cove sent out an alert urging residents in the coastal area to move inland to higher ground.

There was "a low likelihood of casualties and damage" from the quake itself, the United States Geological Survey said.

Rita Tungul, the front desk assistant at the Grand Aleutian Hotel in Unalaska, said she felt some shaking but it wasn't strong.

There is a tsunami warning for the Alaska Archipelago. Officials said about 80 aftershocks were reported in the quake's aftermath.

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