Two aftershocks centered in roughly the same area shook Southcentral Alaska late Wednesday morning within a half hour.
The first aftershock, with a reviewed magnitude of 4.1, struck at 11:04 a.m. 13 miles northwest of Joint Base Elmendorf-Richardson, according to the Alaska Earthquake Center.
It was the largest aftershock in just over two weeks.
A second, smaller quake, centered a few miles south of the first, followed 23 minutes later with a reviewed magnitude of 3.7.
Both epicenters were located at the southern end of a 20-mile-long “fault patch,” roughly underneath Point MacKenzie. More than 8,000 aftershocks have originated there since the Nov. 30 main shock.
Both quakes also struck at a similar depth. The earthquake center estimates the first hit about 26 miles down, while the second was 21 miles.
Seismologists expect the region to continue rumbling until at least September.