ANCHORAGE (KTUU) - A magnitude 4.9 earthquake woke Anchorage residents early Thursday morning.
According to the United States Geological Survey, it was 12 KM, or 7.4 miles, northwest of Anchorage. The shake registered at 5:21 a.m. Alaska time on Dec. 27.
The USGS reading of its magnitude is 5.0, but a reviewed aftershock from the Alaska Earthquake Center reading shows it was a M4.9.
According to the Center, the depth was 22 miles, and it was an aftershock on the south end of the rupture patch created by last month's magnitude 7.0 quake.
"This one was closer to Anchorage than most, which could explain why people are saying it felt stronger than it was," Alaska Earthquake Center officials said in a tweet on Thursday.
Officials say the 4.9 was just one of over 6,000 aftershocks stemming from the major 7.0 quake that rocked Anchorage and the Mat-Su Valley last month.
Of those 6,100 aftershocks, roughly 40 of them, including the one on Thursday, have been 4.0 or greater in magnitude.
This is a developing story and will be updated.