M3.3 earthquake 101 km S of Alcan Border, Alaska
A magnitude 3.3 earthquake struck 101 km S of Alcan Border, Alaska on Sat, Apr 15, 1978, 7:33 AM GMT-10 (17:33 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M3.8 124 km E of McCarthy, 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 (mb), minor
- Local time
- UTC
- 1978-04-15 17:33:14 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 61.763° N, 141.089° 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
- 17
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 0 in the 30 days before it.
After
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000u46. Read Tue, Sep 22, 2026, 8:01 AM UTC.