M4.4 earthquake 192 km W of Adak, Alaska
A magnitude 4.4 earthquake struck 192 km W of Adak, Alaska on Sun, Feb 23, 1975, 8:28 PM GMT-10 (06:28 UTC), 59 km (37 mi) below the surface.
A larger quake followed: M4.7 186 km WSW of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.4 (mb), light
- Local time
- UTC
- 1975-02-24 06:28:38 UTC
- Depth
- 59.0 km (36.7 mi), shallow
- Epicenter
- 51.655° N, 179.402° 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
- 10
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 7 in the 30 days before it.
After
- 4.7186 km WSW of Adak, Alaska · 18838 days ago · 59 km deep · 30 km away
- 4.3205 km WSW of Adak, Alaska · 18815 days ago · 63 km deep · 71 km away
- 4.9218 km WSW of Adak, Alaska · 18814 days ago · 53 km deep · 47 km away
- 5.4211 km WSW of Adak, Alaska · 18814 days ago · 57 km deep · 38 km away
- 4.1224 km WSW of Adak, Alaska · 18813 days ago · 56 km deep · 54 km away
- 4.9117 km WSW of Adak, Alaska · 18801 days ago · 62 km deep · 77 km away
Before
- 5.0194 km WSW of Adak, Alaska · 18839 days ago · 50 km deep · 44 km away
- 5.0201 km WSW of Adak, Alaska · 18839 days ago · 55 km deep · 34 km away
- 5.1197 km WSW of Adak, Alaska · 18840 days ago · 62 km deep · 37 km away
- 4.8205 km WSW of Adak, Alaska · 18840 days ago · 46 km deep · 29 km away
- 4.2213 km WSW of Adak, Alaska · 18840 days ago · 47 km deep · 54 km away
- 4.3211 km WSW of Adak, Alaska · 18840 days ago · 52 km deep · 39 km away
- 6.5200 km WSW of Adak, Alaska · 18840 days ago · 48 km deep · 31 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000a0p. Read Tue, Sep 22, 2026, 11:14 AM UTC.