M3.0 earthquake 247 km SE of Atka, Alaska
A magnitude 3.0 earthquake struck 247 km SE of Atka, Alaska on Mon, Oct 23, 2023, 7:04 PM HADT (04:04 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M3.9 263 km SE 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
- 3.0 (ML, local (Richter)), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2023-10-24 04:04:31 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 50.737° N, 171.520° 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 |
|---|---|---|---|
| 3.0 | ML, local (Richter) | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.121 · 9 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 5.2 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- Operator assigned
- Station coverage gap
- 246°, 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 2 in the 30 days before it.
After
- 2.8238 km ESE of Atka, Alaska · 1069 days ago · 10 km deep · 64 km away
- 3.9263 km SE of Atka, Alaska · 1057 days ago · 10 km deep · 30 km away
- 3.7243 km SE of Atka, Alaska · 1057 days ago · 10 km deep · 35 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000la67 (also filed as ak023dn90qck). Read Mon, Oct 5, 2026, 3:20 AM UTC.