M3.1 earthquake 3 km SE of Big Lake, Alaska
A magnitude 3.1 earthquake struck 3 km SE of Big Lake, Alaska on Thu, Mar 21, 1985, 6:00 PM AKST (03:00 UTC), 42 km (26 mi) below the surface.
A larger quake followed: M4.1 34 km NNW of Susitna, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.1 (ml), minor
- Local time
- UTC
- 1985-03-22 03:00:09 UTC
- Depth
- 42.2 km (26.2 mi), shallow
- Epicenter
- 61.494° N, 149.916° 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.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 2.75 km WSW of Knik, Alaska · 15134 days ago · 47 km deep · 7 km away
- 4.134 km NNW of Susitna, Alaska · 15125 days ago · 65 km deep · 60 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002d3q. Read Tue, Sep 22, 2026, 9:40 AM UTC.