A strong 8.2 magnitude quake hits Alaska’s Perryville on early Thursday, said the United States Geological Survey (USGS).
The U.S. Geological Survey said the quake struck at about 8:15 p.m. (Hawaii time) and was centered 56 miles east-southeast of Perryville, on the Alaskan Peninsula, which is under a tsunami warning. The quake was about 29 miles below the surface of the ocean.
Tsunami warnings were put in place for parts of southern Alaska, the Alaska Peninsula, and the Aleutian Islands by the National Tsunami Warning Center.
A tsunami advisory was also issued for southeast Alaska, but the National Weather Service said there was no tsunami threat to Anchorage.
The Alaska Division of Homeland Security and Emergency Management tweeted that the State Emergency Operations Center “had been activated and is calling communities in the tsunami warning area.”
There were at least two strong aftershocks with preliminary magnitudes of 6.2 and magnitude 5.6, the USGS said.
The tsunami warning, which was issued for coastal areas of southern Alaska, the Alaska Peninsula, and the Aleutian Islands, was eventually canceled after about an hour, but the NTWS warned in a tweet that “strong and unusual currents may continue for several hours.”
The Pacific Tsunami Warning Center said tonight’s tsunami watch has been canceled.
“Based on all available data there is no tsunami threat to the state of Hawaii,” PWTC said.
There were no reports of injuries or property damage.
According to The U.S. Geological Survey, Since 1900, 8 other earthquakes M7 and larger have occurred within 250 km of the July 29, 2021 event, including earthquakes of M7.8 on July 22, 2020 (located 62 km west of the July 29, 2021 event) and M7.6 on October 19, 2020 (located 145 west of the July 29, 2021 event). Given the temporal and spatial proximity of the July 29, 2021 earthquake to the two previous large earthquakes in July and October 2020, those previous events were foreshocks of the July 2021 earthquake. An earthquake of M8.2 also occurred on November 10, 1938 within 40 km of the July 29, 2021 event. While initial information is incomplete, the July 29 earthquake may have ruptured partially or completely into the ruptured region of the 1938 earthquake.
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