M4.4 earthquake 115 km SE of Adak, Alaska
A magnitude 4.4 earthquake struck 115 km SE of Adak, Alaska on Mon, Aug 1, 1977, 4:22 PM GMT-10 (02:22 UTC), 19 km (12 mi) below the surface.
A larger quake followed: M4.5 36 km SSE 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
- 1977-08-02 02:22:02 UTC
- Depth
- 19.0 km (11.8 mi), shallow
- Epicenter
- 51.220° N, 175.337° 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
- 66
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.536 km SSE of Adak, Alaska · 17936 days ago · 63 km deep · 83 km away
- 5.486 km WSW of Atka, Alaska · 17933 days ago · 57 km deep · 72 km away
- 4.278 km WSW of Atka, Alaska · 17932 days ago · 33 km deep · 69 km away
- 4.267 km WSW of Atka, Alaska · 17929 days ago · 33 km deep · 93 km away
- 4.457 km ESE of Adak, Alaska · 17897 days ago · 61 km deep · 62 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000pyn (also filed as iscgemsup694021). Read Tue, Sep 22, 2026, 8:28 PM UTC.