M3.8 earthquake 247 km SE of Atka, Alaska
A magnitude 3.8 earthquake struck 247 km SE of Atka, Alaska on Tue, Feb 7, 2023, 2:47 AM HAST (12:47 UTC), 19 km (12 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.8 (mb, body-wave), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2023-02-07 12:47:41 UTC
- Depth
- 19.4 km (12.1 mi), shallow
- Epicenter
- 50.966° N, 171.218° W
- Region
- Alaska
- Strongest shaking
- I, not felt shaking
- 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 |
|---|---|---|---|
| 3.8 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.06 · 71 stations |
| 3.8 | ML, local (Richter) | Alaska Earthquake Center | Preliminary |
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- I, not felt shaking
- Peak ground acceleration
- 0.0% of gravity
- Peak ground velocity
- -5.0 cm/s
- Map
- Automatic
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 7.2 km horizontally, 5.2 km in depth
- Magnitude uncertainty
- ±0.06
- Depth from
- From location
- Station coverage gap
- 132°
- Stations used
- 136
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 3.1196 km ESE of Atka, Alaska · 1331 days ago · 35 km deep · 95 km away
- 3.0183 km ESE of Atka, Alaska · 1327 days ago · 35 km deep · 95 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000jm7w (also filed as ak0231r1ujqw). Read Thu, Oct 1, 2026, 9:44 PM UTC.