M3.5 earthquake 77 km SSE of Alcan Border, Alaska
A magnitude 3.5 earthquake struck 77 km SSE of Alcan Border, Alaska on Tue, Aug 22, 1978, 8:39 PM GMT-9 (05:39 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.5 (mb), minor
- Local time
- UTC
- 1978-08-23 05:39:28 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 62.018° N, 140.637° 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
- 21
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000w64. Read Tue, Sep 22, 2026, 5:41 AM UTC.