M4.6 earthquake 93 km SSE of Old Harbor, Alaska
A magnitude 4.6 earthquake struck 93 km SSE of Old Harbor, Alaska on Fri, Aug 18, 1978, 6:58 PM GMT-9 (03:58 UTC), 26 km (16 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1978-08-19 03:58:55 UTC
- Depth
- 26.0 km (16.2 mi), shallow
- Epicenter
- 56.443° N, 152.670° 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
- 23
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 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 usp0000w43. Read Tue, Sep 22, 2026, 4:04 PM UTC.