M3.1 earthquake 206 km SE of Atka, Alaska
A magnitude 3.1 earthquake struck 206 km SE of Atka, Alaska on Sun, Oct 28, 2018, 6:09 PM HADT (03:09 UTC), 10 km (6 mi) below the surface.
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
- 2018-10-29 03:09:56 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 50.720° N, 172.402° 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 |
| 3.1 | 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
- Depth from
- Operator assigned
- Station coverage gap
- 236°, poorly surrounded by stations
- Stations used
- 26
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 3 in the 30 days before it.
After
- 2.4204 km S of Atka, Alaska · 2894 days ago · 15 km deep · 94 km away
- 2.7163 km SSE of Atka, Alaska · 2878 days ago · 24 km deep · 52 km away
- 2.6154 km SSE of Atka, Alaska · 2877 days ago · 33 km deep · 96 km away
- 2.7Andreanof Islands, Aleutian Islands, Alaska · 2845 days ago · 28 km deep · 32 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000i6j5 (also filed as ak018dvi560l, ak20321141). Read Fri, Oct 2, 2026, 4:36 AM UTC.