M4.0 earthquake - Rat Islands, Aleutian Islands, Alaska
3344 d ago · 21 Aug 2017, 11:46 UTC Rat Islands, Aleutian Islands, Alaska
What happened
A magnitude 4 earthquake struck Rat Islands, Aleutian Islands, Alaska on 21 Aug 2017, 11:46 UTC at a depth of 25 km.
Earthquakes of this size are classed as Light. Widely felt nearby; objects may shake or fall. Significant damage is unusual. This was a shallow earthquake, which tends to be felt more strongly at the surface.
Timeline
First reported by USGS
17 Oct 2026, 08:43 UTC
Community Live
Did you feel it?
Nearby in the last 30 days
- 4.0
M4.0 earthquake - Rat Islands, Aleutian Islands, Alaska
87 km deep
Moderate - 2.5
M2.5 earthquake - Rat Islands, Aleutian Islands, Alaska
56 km deep
Light - 2.6
M2.6 earthquake - 294 km W of Adak, Alaska
65 km deep
Light - 3.9
M3.9 earthquake - 294 km ESE of Attu Station, Alaska
8 km deep
Light - 2.8
M2.8 earthquake - Rat Islands, Aleutian Islands, Alaska
7 km deep
Light - 3.4
M3.4 earthquake - Rat Islands, Aleutian Islands, Alaska
27 km deep
Light - 3.1
M3.1 earthquake - Rat Islands, Aleutian Islands, Alaska
17 km deep
Light - 3.2
M3.2 earthquake - Rat Islands, Aleutian Islands, Alaska
13 km deep
Light - 4.4
M4.4 earthquake - 275 km W of Adak, Alaska
95 km deep
Moderate - 4.6
M4.6 earthquake - Rat Islands, Aleutian Islands, Alaska
43 km deep
Moderate