M3.1 earthquake 205 km SSE of Atka, Alaska
A magnitude 3.1 earthquake struck 205 km SSE of Atka, Alaska on Sat, Sep 27, 2025, 4:14 AM HADT (13:14 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M3.8 176 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
- 3.1 (ML, local (Richter)), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2025-09-27 13:14:34 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 50.480° N, 173.096° 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 |
|---|---|---|---|
| 3.1 | ML, local (Richter) | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.128 · 10 stations |
| 2.9 | 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 8.5 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.13
- Depth from
- Operator assigned
- Station coverage gap
- 244°, poorly surrounded by stations
- Stations used
- 12
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 5 in the 30 days before it.
After
- 3.8176 km SSE of Atka, Alaska · 349 days ago · 10 km deep · 39 km away
- 3.7195 km SE of Atka, Alaska · 319 days ago · 10 km deep · 71 km away
- 3.8175 km SSE of Atka, Alaska · 314 days ago · 10 km deep · 31 km away
Before
- 2.7136 km SSE of Atka, Alaska · 394 days ago · 20 km deep · 69 km away
- 2.8275 km SSE of Atka, Alaska · 395 days ago · 10 km deep · 78 km away
- 2.5167 km S of Atka, Alaska · 395 days ago · 10 km deep · 82 km away
- 3.1202 km SSE of Atka, Alaska · 396 days ago · 10 km deep · 34 km away
- 3.7176 km SSE of Atka, Alaska · 396 days ago · 10 km deep · 38 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000rf7n (also filed as ak025ceqxf65). Read Fri, Oct 2, 2026, 9:53 AM UTC.