M4.3 earthquake 185 km SSW of Adak, Alaska
A magnitude 4.3 earthquake struck 185 km SSW of Adak, Alaska on Sat, Oct 14, 1978, 2:55 PM GMT-10 (00:55 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
- 4.3 (mb), light
- Local time
- UTC
- 1978-10-15 00:55:31 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 50.377° N, 177.805° 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
- 13
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 usp0000x0d. Read Tue, Sep 22, 2026, 5:16 PM UTC.