M3.8 earthquake 39 km W of Tyonek, Alaska
A magnitude 3.8 earthquake struck 39 km W of Tyonek, Alaska on Mon, Aug 4, 1980, 8:31 AM GMT-9 (17:31 UTC), 96 km (60 mi) below the surface.
A larger quake followed: M4.3 66 km SW of Skwentna, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.8 (mb, body-wave), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1980-08-04 17:31:00 UTC
- Depth
- 96.0 km (59.7 mi), intermediate-depth
- Epicenter
- 61.087° N, 151.870° 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.
- Stations used
- 13
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
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
- 3.717 km WNW of Salamatof, Alaska · 16844 days ago · 87 km deep · 49 km away
- 4.366 km SW of Skwentna, Alaska · 16843 days ago · 128 km deep · 63 km away
- 3.614 km ESE of Tyonek, Alaska · 16824 days ago · 33 km deep · 53 km away
- 3.313 km NNE of Sterling, Alaska · 16805 days ago · 33 km deep · 80 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001995. Read Fri, Oct 2, 2026, 4:09 PM UTC.