An aftershock with a preliminary magnitude of 4.0 shook the Anchorage area just after 4 p.m. Thursday.
The shake, at 4:07 p.m. was centered about nine miles north of Anchorage in the Point MacKenzie area, and is considered an aftershock of the 7.1 earthquake on Nov. 30, 2018, according to the Alaska Earthquake Center. It occurred at a depth of 29 miles, the center reported.
It was felt by many people in the area, according to social media posts.
More than 11,000 aftershocks have been reported since the Nov. 30 earthquake, many of them strong enough to be felt.
There have been more than 40 aftershocks with a magnitude of 4.0 or higher since the initial November earthquake, according to Natalia Ruppert at the Alaska Earthquake Center.