M3.1 earthquake 33 km SSW of Tatitlek, Alaska
A magnitude 3.1 earthquake struck 33 km SSW of Tatitlek, Alaska on Fri, Aug 11, 1978, 12:00 AM GMT-9 (09:00 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M3.9 50 km WNW of Valdez, 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
- 1978-08-11 09:00:20 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 60.577° N, 146.864° 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
- 9
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 1 in the 30 days before it.
After
- 3.950 km WNW of Valdez, Alaska · 17535 days ago · 32 km deep · 86 km away
- 3.035 km NW of Valdez, Alaska · 17523 days ago · 33 km deep · 82 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000w0j. Read Tue, Sep 22, 2026, 7:25 AM UTC.