M3.4 earthquake 219 km SSW of Nikolski, Alaska
A magnitude 3.4 earthquake struck 219 km SSW of Nikolski, Alaska on Sat, Mar 27, 2021, 6:08 PM HADT (03:08 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M3.6 126 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
- 3.4 (ml), minor
- Local time
- UTC
- 2021-03-28 03:08:30 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 51.147° N, 170.205° 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 4.9 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.15
- Depth from
- Operator assigned
- Station coverage gap
- 232°, poorly surrounded by stations
- Stations used
- 20
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 3.6126 km SSW of Nikolski, Alaska · 1999 days ago · 22 km deep · 95 km away
- 2.7221 km SW of Nikolski, Alaska · 1985 days ago · 22 km deep · 50 km away
- 3.4203 km SSW of Nikolski, Alaska · 1952 days ago · 10 km deep · 35 km away
- 3.8154 km SW of Nikolski, Alaska · 1949 days ago · 35 km deep · 96 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000e45n (also filed as ak0213zxla0a). Read Thu, Sep 24, 2026, 5:44 AM UTC.