M5.6 earthquake 148 km S of False Pass, Alaska
A magnitude 5.6 earthquake struck 148 km S of False Pass, Alaska on Mon, Apr 10, 1978, 6:12 PM GMT-11 (05:12 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
- 5.6 (ms), moderate
- Local time
- UTC
- 1978-04-11 05:12:55 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 53.535° N, 163.731° 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
- 224
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 4 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.886 km SSW of False Pass, Alaska · 17690 days ago · 33 km deep · 70 km away
- 4.4131 km S of False Pass, Alaska · 17686 days ago · 51 km deep · 17 km away
- 4.9109 km ESE of Akutan, Alaska · 17664 days ago · 33 km deep · 51 km away
- 4.465 km SSW of False Pass, Alaska · 17661 days ago · 33 km deep · 91 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000u0v (also filed as ushis3471, iscgem683585). Read Tue, Sep 22, 2026, 3:09 AM UTC.