M2.0 earthquake 150 km NNW of Atka, Alaska
A magnitude 2.0 earthquake struck 150 km NNW of Atka, Alaska on Fri, Sep 24, 2021, 3:29 PM HADT (00:29 UTC), 104 km (64 mi) below the surface.
A larger quake followed: M4.1 147 km NNE of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 2.0 (ml), micro
- Local time
- UTC
- 2021-09-25 00:29:29 UTC
- Depth
- 103.7 km (64.4 mi), intermediate-depth
- Epicenter
- 53.441° N, 175.087° 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.
- Stations used
- 10
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
- 4.1147 km NNE of Adak, Alaska · 1800 days ago · 10 km deep · 71 km away
- 4.058 km NNW of Atka, Alaska · 1774 days ago · 211 km deep · 93 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ak021cb87bv0. Read Thu, Sep 24, 2026, 5:45 AM UTC.