M2.8 earthquake 213 km SSE of Adak, Alaska
A magnitude 2.8 earthquake struck 213 km SSE of Adak, Alaska on Sun, Aug 31, 2025, 8:31 PM HADT (05:31 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M3.1 250 km SSE of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.8 (ML, local (Richter)), micro
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2025-09-01 05:31:52 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 50.237° N, 175.052° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 2.8 | ML, local (Richter) | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.115 · 10 stations |
| 2.8 | ML, local (Richter) | Alaska Earthquake Center | Preliminary |
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 7.9 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- Operator assigned
- Station coverage gap
- 294°, poorly surrounded by stations
- Stations used
- 18
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 7 in the 30 days before it.
After
- 2.5167 km S of Atka, Alaska · 395 days ago · 10 km deep · 78 km away
- 3.1250 km SSE of Adak, Alaska · 349 days ago · 10 km deep · 73 km away
Before
- 2.6228 km SSE of Adak, Alaska · 408 days ago · 20 km deep · 17 km away
- 2.0171 km S of Adak, Alaska · 408 days ago · 10 km deep · 90 km away
- 2.5239 km S of Atka, Alaska · 408 days ago · 15 km deep · 33 km away
- 2.9191 km SSE of Adak, Alaska · 409 days ago · 36 km deep · 24 km away
- 2.5174 km S of Atka, Alaska · 412 days ago · 25 km deep · 78 km away
- 1.9124 km SE of Adak, Alaska · 424 days ago · 1 km deep · 90 km away
- 2.7159 km SSE of Adak, Alaska · 424 days ago · 10 km deep · 70 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000rjck (also filed as ak025b7malps). Read Fri, Oct 2, 2026, 2:12 PM UTC.