A magnitude 4.8 earthquake shook the Anchorage area just before 10 a.m. Tuesday, and officials say it was an aftershock of the big 2018 Anchorage earthquake.
Tuesday’s earthquake, originally estimated at magnitude 4.9, was centered about 9 miles north of Anchorage at a depth of about 26 miles, according to the Alaska Earthquake Center.
We have our reviewed location and magnitude for the event at 9:54am as a M4.8 aftershock of the 2018 Anchorage Earthquake. It was felt widely in Southcentral Alaska.
— Alaska Earthquake Center (@AKearthquake) April 27, 2021
Yes, it can still be an aftershock more than two years later! https://t.co/kSIVuxngyd pic.twitter.com/VJffWsEkL3
The 9:54 a.m. earthquake was felt throughout Anchorage as well as on the Kenai Peninsula and in the Matanuska-Susitna Borough and Valdez, according to the U.S. Geological Survey.
No damage was reported in the hour following the quake, said Lea Gardine, a seismologist at the Alaska Earthquake Center.
The earthquake was an aftershock of the 7.1 earthquake that struck just north of Anchorage more than two years ago. There have been more than 11,000 aftershocks in the years since that Nov. 30, 2018, earthquake, according to the earthquake center. The largest was a magnitude 5.7 that occurred soon after the first quake.
About 30 minutes before Tuesday’s quake, another earthquake struck about 41 miles southeast of Whittier. Gardine said the two quakes were not connected or on the same fault line.
No damage was reported in Whittier, Gardine said. That quake was felt in Anchorage and as far north as Talkeetna, according to a report from the USGS.