M4.5 earthquake 68 km SE of Atka, Alaska
A magnitude 4.5 earthquake struck 68 km SE of Atka, Alaska on Fri, Apr 6, 1973, 7:28 AM GMT-11 (18:28 UTC), 21 km (13 mi) below the surface.
A larger quake followed: M4.7 89 km SE 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
- 4.5 (mb), light
- Local time
- UTC
- 1973-04-06 18:28:56 UTC
- Depth
- 21.0 km (13.0 mi), shallow
- Epicenter
- 51.766° N, 173.480° 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
- 44
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.789 km SE of Atka, Alaska · 19527 days ago · 40 km deep · 21 km away
- 5.482 km SE of Atka, Alaska · 19479 days ago · 43 km deep · 16 km away
- 4.464 km ESE of Atka, Alaska · 19479 days ago · 50 km deep · 19 km away
- 4.169 km SE of Atka, Alaska · 19479 days ago · 24 km deep · 5 km away
- 4.587 km SE of Atka, Alaska · 19478 days ago · 45 km deep · 19 km away
- 4.585 km SE of Atka, Alaska · 19478 days ago · 47 km deep · 16 km away
- 3.755 km SSE of Atka, Alaska · 19475 days ago · 54 km deep · 24 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000019h. Read Tue, Sep 22, 2026, 12:18 PM UTC.