M2.6 earthquake 228 km SSE of Adak, Alaska
A magnitude 2.6 earthquake struck 228 km SSE of Adak, Alaska on Wed, Aug 20, 2025, 4:12 PM HADT (01:12 UTC), 20 km (12 mi) below the surface.
A larger quake followed: M3.1 202 km SSE of Atka, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.6 (ML, local (Richter)), micro
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2025-08-21 01:12:05 UTC
- Depth
- 19.6 km (12.2 mi), shallow
- Epicenter
- 50.153° N, 174.851° 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 |
|---|---|---|---|
| 2.6 | ML, local (Richter) | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.097 · 14 stations |
| 2.4 | 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 10.8 km horizontally, 9.7 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 279°, poorly surrounded by stations
- Stations used
- 18
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 7 in the 30 days before it.
After
- 3.1202 km SSE of Atka, Alaska · 396 days ago · 10 km deep · 96 km away
- 2.8213 km SSE of Adak, Alaska · 396 days ago · 10 km deep · 17 km away
- 2.5167 km S of Atka, Alaska · 395 days ago · 10 km deep · 75 km away
- 3.1250 km SSE of Adak, Alaska · 349 days ago · 10 km deep · 76 km away
Before
- 2.5239 km S of Atka, Alaska · 408 days ago · 15 km deep · 16 km away
- 2.9191 km SSE of Adak, Alaska · 408 days ago · 36 km deep · 41 km away
- 2.5174 km S of Atka, Alaska · 412 days ago · 25 km deep · 73 km away
- 2.7159 km SSE of Adak, Alaska · 424 days ago · 10 km deep · 87 km away
- 2.9161 km SSW of Atka, Alaska · 427 days ago · 10 km deep · 76 km away
- 1.8152 km SE of Adak, Alaska · 430 days ago · 26 km deep · 78 km away
- 1.8185 km SSE of Adak, Alaska · 431 days ago · 8 km deep · 44 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000rjb3 (also filed as ak025apcvvxm). Read Fri, Oct 2, 2026, 8:58 AM UTC.