ALEUTIANS WEST CENSUS AREA, AK — A 5.6 magnitude quake occurred near Atka on Friday morning, the U.S. Geological Survey reported.

At 12:16 p.m. (1:16 a.m. local time), a tremor hit the region at a depth of 8 miles, with its epicenter about 109 miles east of Atka. The magnitude was originally reported as 5.2 but later upgraded to 5.6.

Did you feel it?

If you felt the earthquake, you can share your experience using the USGS Felt Report form.

Impact and estimated losses

The USGS categorized this as a Green Alert, which means there is a low likelihood of casualties and damage.

Structure information summary
Most structures in this region are resistant to earthquake shaking, though vulnerable structures exist. The predominant vulnerable building types are unreinforced brick masonry and reinforced masonry construction.

Tremors last week

Five tremors of magnitude 2.5 or above have been recorded in the area over the last week. The largest one was a 4.9 earthquake that was registered in the same region on May 18.

The five largest nearby quakes from last week:

• 4.9, east of Atka on May 18
• 3.4, east of Atka on May 16
• 3.2, east of Atka on May 17
• 3.2, east-northeast of Atka on May 18
• 3.0, southwest of Nikolski on May 19

Area struck by 6.9 quake in 1987
Aleutians West Census Area has experience significant earthquakes in the past. A magnitude 6.9 tremor struck 41.6 miles southwest of Unalaska on Feb. 27, 1987, at a depth of 6.2 miles.

Source: The U.S. Geological Survey