Tsunami alert warnings were issued for parts of Alaska after an 8.2-magnitude earthquake hit the peninsula's coast on Thursday.
The aftershock was initially measured at 7.2 magnitudes. The tremor struck around 50 miles south of the town of Perryville.
Two other earthquakes with preliminary magnitudes of 6.2 and 5.6 occurred in the same area within a half-hour of the first one.
Right after the earthquake, National Tsunami Warning Center put in place Tsunami sirens that were heard in the parts of southern and southeast Alaska, the Alaska Peninsula, and the Aleutian Islands.
Warning sirens were blaring along the Alaskan coastline as waves approached.
— R A W S A L E R T S (@rawsalerts)
#BREAKING: The 8.2 earthquake is the largest to strike the United States since 1965 #Alaskal #US
Warning sirens are now blaring along the Alaskan coastline as waves approach.
The Tsunami Warning System is still calculating possible further risks to the Hawaiian Islands
pic.twitter.com/rzzVI4txUD July 29, 2021
The danger from the tsunami had been evaluated for the other US and Canadian Pacific coasts in North America, including Hawaii.
"The State of Alaska, State Emergency Operations Center has been activated and is calling communities in the tsunami warning area," Alaska divisions of Homeland security & Emergency Management tweeted.
In several areas evacuation has been reported.