WASHINGTON: A powerful 7.9-magnitude earthquake struck off the coast of Alaska early Tuesday, sparking tsunami warnings along the Pacific coasts of the US and Canada that were later called off, reports AFP.
The quake struck at 12:31 am (0931 GMT) in the Gulf of Alaska, 280 kilometers (175 miles) southeast of the town of Kodiak, the US Geological Survey said, revising a preliminary estimate of 8.2 magnitude.The epicenter was 10 kilometers under the seabed.
The National Tsunami Warning Center did confirm a tsunami, meaning the water levels were slightly above normal.
Waves of less than one foot (30 centimeters) were detected in parts of southern Alaska, authorities said. As a precaution, officials in those areas encouraged residents to remain at higher ground.
But the monitoring center later canceled warnings and watches for coastal regions in Alaska, Canada’s British Columbia and the US West Coast “because additional information and analysis have better defined the threat.”