M2.8 earthquake 244 km SSW of Adak, Alaska
A magnitude 2.8 earthquake struck 244 km SSW of Adak, Alaska on Fri, Feb 21, 2025, 1:58 PM HAST (23:58 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.5 163 km SSW 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
- 2025-02-21 23:58:38 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 49.960° N, 178.349° 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 · ±0.105 · 12 stations |
| 2.6 | 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 7.5 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- Operator assigned
- Station coverage gap
- 255°, poorly surrounded by stations
- Stations used
- 18
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 1 in the 30 days before it.
After
- 3.0252 km SW of Adak, Alaska · 578 days ago · 10 km deep · 79 km away
- 3.0270 km SW of Adak, Alaska · 577 days ago · 10 km deep · 74 km away
- 1.9180 km SW of Adak, Alaska · 555 days ago · 7 km deep · 97 km away
- 2.1190 km SSW of Adak, Alaska · 553 days ago · 26 km deep · 54 km away
- 4.5163 km SSW of Adak, Alaska · 543 days ago · 10 km deep · 86 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000pzuf (also filed as ak0252edzjce). Read Sat, Oct 3, 2026, 5:58 AM UTC.