M3.2 earthquake 104 km WNW of Nikolski, Alaska
A magnitude 3.2 earthquake struck 104 km WNW of Nikolski, Alaska on Mon, Sep 20, 2021, 8:36 PM AKDT (04:36 UTC), 204 km (127 mi) below the surface.
A larger quake followed: M3.8 179 km WNW 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
- 3.2 (ml), minor
- Local time
- UTC
- 2021-09-21 04:36:55 UTC
- Depth
- 203.8 km (126.7 mi), intermediate-depth
- Epicenter
- 53.462° N, 170.152° 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 19.1 km horizontally, 20.8 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 175°
- Stations used
- 35
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 3 in the 30 days before it.
After
- 2.225 km W of Nikolski, Alaska · 1816 days ago · 86 km deep · 87 km away
- 2.345 km SW of Nikolski, Alaska · 1804 days ago · 20 km deep · 99 km away
- 3.8179 km WNW of Nikolski, Alaska · 1796 days ago · 253 km deep · 80 km away
- 1.739 km WSW of Nikolski, Alaska · 1779 days ago · 5 km deep · 82 km away
- 2.556 km W of Nikolski, Alaska · 1774 days ago · 85 km deep · 65 km away
- 2.9122 km W of Nikolski, Alaska · 1774 days ago · 134 km deep · 65 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000fd5q (also filed as ak021c4ohcer). Read Sun, Sep 27, 2026, 6:09 PM UTC.