M3.7 earthquake 187 km S of Adak, Alaska
A magnitude 3.7 earthquake struck 187 km S of Adak, Alaska on Wed, Oct 6, 2021, 11:24 PM HADT (08:24 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
- 3.7 (mb), minor
- Local time
- UTC
- 2021-10-07 08:24:48 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 50.197° N, 176.347° 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 10.9 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- Operator assigned
- Station coverage gap
- 231°, poorly surrounded by stations
- Stations used
- 42
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 6 in the 30 days before it.
After
- 2.4177 km SSE of Adak, Alaska · 1807 days ago · 13 km deep · 85 km away
- 2.8188 km S of Adak, Alaska · 1793 days ago · 10 km deep · 15 km away
- 3.2118 km SSW of Adak, Alaska · 1792 days ago · 33 km deep · 92 km away
- 1.9156 km SSE of Adak, Alaska · 1789 days ago · 36 km deep · 83 km away
- 2.3178 km S of Adak, Alaska · 1788 days ago · 20 km deep · 57 km away
Before
- 3.1Andreanof Islands, Aleutian Islands, Alaska · 1825 days ago · 10 km deep · 4 km away
- 3.1164 km S of Adak, Alaska · 1834 days ago · 10 km deep · 25 km away
- 2.4163 km S of Adak, Alaska · 1835 days ago · 24 km deep · 26 km away
- 4.5161 km S of Adak, Alaska · 1835 days ago · 10 km deep · 28 km away
- 2.7105 km SSE of Adak, Alaska · 1842 days ago · 10 km deep · 83 km away
- 1.7111 km S of Adak, Alaska · 1843 days ago · 35 km deep · 86 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000fu0m (also filed as ak021cv7dvyu). Read Thu, Sep 24, 2026, 8:04 AM UTC.