M3.1 earthquake 199 km S of Unalaska, Alaska
A magnitude 3.1 earthquake struck 199 km S of Unalaska, Alaska on Wed, Nov 10, 2021, 6:22 AM AKST (15:22 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.2 165 km SE of Nikolski, 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), minor
- Local time
- UTC
- 2021-11-10 15:22:56 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 52.109° N, 166.024° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
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 6.3 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- Operator assigned
- Station coverage gap
- 293°, poorly surrounded by stations
- Stations used
- 25
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 5 in the 30 days before it.
After
- 2.0140 km S of Unalaska, Alaska · 1761 days ago · 26 km deep · 60 km away
- 5.2165 km SE of Nikolski, Alaska · 1753 days ago · 10 km deep · 74 km away · felt by 5
- 2.7129 km SSE of Unalaska, Alaska · 1743 days ago · 10 km deep · 93 km away
- 2.0134 km S of Unalaska, Alaska · 1742 days ago · 14 km deep · 76 km away
- 1.9134 km S of Unalaska, Alaska · 1742 days ago · 10 km deep · 77 km away
- 3.2116 km S of Unalaska, Alaska · 1742 days ago · 2 km deep · 94 km away
- 2.0south of the Aleutian Islands · 1740 days ago · 20 km deep · 91 km away
- 3.5194 km SSE of Unalaska, Alaska · 1739 days ago · 10 km deep · 10 km away
- 2.4138 km S of Unalaska, Alaska · 1733 days ago · 10 km deep · 61 km away
Before
- 2.8194 km SE of Unalaska, Alaska · 1782 days ago · 5 km deep · 94 km away
- 2.0127 km S of Unalaska, Alaska · 1787 days ago · 6 km deep · 82 km away
- 1.7108 km S of Unalaska, Alaska · 1788 days ago · 13 km deep · 98 km away
- 3.0138 km SE of Unalaska, Alaska · 1796 days ago · 8 km deep · 96 km away
- 2.2161 km SSE of Unalaska, Alaska · 1806 days ago · 9 km deep · 80 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000gbw4 (also filed as ak021efjtbbm). Read Wed, Sep 23, 2026, 11:54 AM UTC.