M4.3 earthquake 27 km W of Susitna, Alaska
A magnitude 4.3 earthquake struck 27 km W of Susitna, Alaska on Fri, Aug 21, 1981, 8:58 PM GMT-9 (05:58 UTC), 72 km (45 mi) below the surface.
A larger quake followed: M5.1 21 km N 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
- 4.3 (mb), light
- Local time
- UTC
- 1981-08-22 05:58:21 UTC
- Depth
- 71.9 km (44.7 mi), intermediate-depth
- Epicenter
- 61.525° N, 151.035° 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: 5 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.121 km N of Susitna, Alaska · 16463 days ago · 71 km deep · 39 km away
- 3.210 km SW of Susitna North, Alaska · 16439 days ago · 33 km deep · 84 km away
- 3.727 km E of Skwentna, Alaska · 16432 days ago · 73 km deep · 51 km away
- 4.225 km NE of Skwentna, Alaska · 16425 days ago · 105 km deep · 71 km away
- 3.416 km SW of Point Possession, Alaska · 16419 days ago · 33 km deep · 77 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001fdv. Read Thu, Sep 24, 2026, 5:11 AM UTC.