M2.8 earthquake 253 km SSW of Nikolski, Alaska
A magnitude 2.8 earthquake struck 253 km SSW of Nikolski, Alaska on Mon, Sep 6, 2021, 3:51 PM HADT (00:51 UTC), 15 km (9 mi) below the surface.
A larger quake followed: M3.5 214 km SSW 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
- 2.8 (ml), micro
- Local time
- UTC
- 2021-09-07 00:51:55 UTC
- Depth
- 14.8 km (9.2 mi), shallow
- Epicenter
- 50.877° N, 170.446° 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 11.0 km horizontally, 9.9 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- From location
- Station coverage gap
- 249°, poorly surrounded by stations
- Stations used
- 20
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 1 in the 30 days before it.
After
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000fqki (also filed as ak021bhgo089). Read Sat, Sep 26, 2026, 10:25 PM UTC.