M3.4 earthquake 191 km SE of Nikolski, Alaska
A magnitude 3.4 earthquake struck 191 km SE of Nikolski, Alaska on Sat, May 1, 2021, 12:07 PM AKDT (20:07 UTC), 11 km (7 mi) below the surface.
A larger quake followed: M3.6 217 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
- 3.4 (mb), minor
- Local time
- UTC
- 2021-05-01 20:07:04 UTC
- Depth
- 11.0 km (6.8 mi), shallow
- Epicenter
- 51.751° N, 166.832° 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 8.8 km horizontally, 6.7 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- From location
- Station coverage gap
- 226°, poorly surrounded by stations
- Stations used
- 42
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 2 in the 30 days before it.
After
- 3.4188 km SE of Nikolski, Alaska · 1976 days ago · 12 km deep · 5 km away
- 2.9140 km SSE of Nikolski, Alaska · 1964 days ago · 10 km deep · 69 km away
- 3.6217 km SE of Nikolski, Alaska · 1948 days ago · 10 km deep · 43 km away
- 2.6140 km SSE of Nikolski, Alaska · 1948 days ago · 10 km deep · 100 km away
- 1.7165 km S of Unalaska, Alaska · 1918 days ago · 19 km deep · 82 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000e10z. Read Mon, Sep 28, 2026, 11:33 AM UTC.