M5.5 earthquake 84 km S of False Pass, Alaska
A magnitude 5.5 earthquake struck 84 km S of False Pass, Alaska on Fri, Apr 11, 1975, 12:47 AM GMT-10 (10:47 UTC), 20 km (12 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.5 (mb), moderate
- Local time
- UTC
- 1975-04-11 10:47:15 UTC
- Depth
- 20.0 km (12.4 mi), shallow
- Epicenter
- 54.097° N, 163.248° 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
- 147
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.5 and up: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.774 km S of False Pass, Alaska · 18791 days ago · 49 km deep · 12 km away
- 4.488 km S of False Pass, Alaska · 18777 days ago · 34 km deep · 4 km away
- 4.692 km S of False Pass, Alaska · 18773 days ago · 49 km deep · 15 km away
- 5.487 km SSE of False Pass, Alaska · 18764 days ago · 9 km deep · 10 km away
- 3.9102 km ESE of Akutan, Alaska · 18756 days ago · 75 km deep · 84 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000ak1 (also filed as ushis3334, iscgem730010). Read Tue, Sep 29, 2026, 8:37 AM UTC.