M3.3 earthquake 32 km NW of Cooper Landing, Alaska
A magnitude 3.3 earthquake struck 32 km NW of Cooper Landing, Alaska on Sat, Jul 18, 1981, 5:45 PM GMT-9 (02:45 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.6 9 km WNW of Point Possession, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.3 (ml), minor
- Local time
- UTC
- 1981-07-19 02:45:51 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 60.730° N, 150.169° 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
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
- 4.69 km WNW of Point Possession, Alaska · 16493 days ago · 72 km deep · 44 km away
- 4.327 km W of Susitna, Alaska · 16467 days ago · 72 km deep · 100 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001et4. Read Tue, Sep 22, 2026, 9:14 AM UTC.