M3.5 earthquake 85 km ESE of Nikolai, Alaska
A magnitude 3.5 earthquake struck 85 km ESE of Nikolai, Alaska on Mon, Feb 20, 1978, 7:31 PM GMT-10 (05:31 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.5 (mb), minor
- Local time
- UTC
- 1978-02-21 05:31:26 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 62.779° N, 152.784° 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.
- Depth from
- OPERATOR_ASSIGNED
- Stations used
- 11
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 0 in the 60 days after this one and 1 in the 30 days before it.
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000t2t. Read Tue, Sep 22, 2026, 10:17 AM UTC.