M5.1 earthquake 170 km W of Adak, Alaska
A magnitude 5.1 earthquake struck 170 km W of Adak, Alaska on Mon, Mar 13, 1978, 3:30 PM GMT-11 (02:30 UTC), 102 km (63 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.1 (mb), moderate
- Local time
- UTC
- 1978-03-14 02:30:23 UTC
- Depth
- 102.0 km (63.4 mi), intermediate-depth
- Epicenter
- 51.967° N, 179.115° 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
- 50
Nearby
Within 100 km, magnitude 2.1 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 usp0000tcv. Read Tue, Sep 22, 2026, 8:26 PM UTC.