2 more aftershocks strike Anchorage within a half-hour

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.

[The aftershocks keep coming: 4.5 earthquake rumbles through Southcentral Alaska]

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.

[Why are different quake magnitudes reported, and when do these stop being aftershocks?]


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.

Madeline McGee

Madeline McGee is a general assignment reporter for the Daily News.