M4.7 earthquake 39 km WNW of Atka, Alaska
A magnitude 4.7 earthquake struck 39 km WNW of Atka, Alaska on Mon, Jul 23, 1973, 8:51 AM GMT-10 (18:51 UTC), 84 km (52 mi) below the surface.
A larger quake followed: M4.8 65 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
- 4.7 (mb), light
- Local time
- UTC
- 1973-07-23 18:51:02 UTC
- Depth
- 84.0 km (52.2 mi), intermediate-depth
- Epicenter
- 52.312° N, 174.753° 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
- 34
Nearby
Within 100 km, magnitude 1.7 and up: 5 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.865 km SSE of Atka, Alaska · 19384 days ago · 45 km deep · 100 km away
- 5.162 km SE of Atka, Alaska · 19384 days ago · 51 km deep · 97 km away
- 4.562 km SSE of Atka, Alaska · 19384 days ago · 58 km deep · 95 km away
- 4.646 km SE of Atka, Alaska · 19378 days ago · 42 km deep · 84 km away
- 4.567 km SSE of Atka, Alaska · 19360 days ago · 39 km deep · 97 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00002tz. Read Tue, Sep 22, 2026, 3:35 PM UTC.