M4.9 earthquake 76 km SE of Atka, Alaska
A magnitude 4.9 earthquake struck 76 km SE of Atka, Alaska on Tue, Sep 4, 1973, 3:07 PM GMT-10 (01:07 UTC), 42 km (26 mi) below the surface.
A larger quake followed: M5.0 70 km SSE of Atka, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.9 (mb), light
- Local time
- UTC
- 1973-09-05 01:07:36 UTC
- Depth
- 42.0 km (26.1 mi), shallow
- Epicenter
- 51.704° N, 173.423° 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
- 46
Nearby
Within 100 km, magnitude 1.9 and up: 4 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.567 km SSE of Atka, Alaska · 19359 days ago · 39 km deep · 32 km away
- 5.070 km SSE of Atka, Alaska · 19358 days ago · 36 km deep · 20 km away
- 4.1134 km SSE of Atka, Alaska · 19357 days ago · 33 km deep · 64 km away
- 5.4Andreanof Islands, Aleutian Islands, Alaska · 19357 days ago · 49 km deep · 20 km away
Before
- 4.646 km SE of Atka, Alaska · 19377 days ago · 42 km deep · 30 km away
- 4.562 km SSE of Atka, Alaska · 19384 days ago · 58 km deep · 24 km away
- 5.162 km SE of Atka, Alaska · 19384 days ago · 51 km deep · 18 km away
- 4.865 km SSE of Atka, Alaska · 19384 days ago · 45 km deep · 18 km away
- 4.769 km SE of Atka, Alaska · 19387 days ago · 38 km deep · 7 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00003b2. Read Tue, Sep 22, 2026, 6:27 AM UTC.