M4.1 earthquake 61 km SSE of Adak, Alaska
A magnitude 4.1 earthquake struck 61 km SSE of Adak, Alaska on Thu, Aug 16, 1973, 6:50 AM GMT-10 (16:50 UTC), 47 km (29 mi) below the surface.
A larger quake followed: M4.9 54 km S 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
- 4.1 (mb), light
- Local time
- UTC
- 1973-08-16 16:50:23 UTC
- Depth
- 47.0 km (29.2 mi), shallow
- Epicenter
- 51.331° N, 176.459° 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
- 9
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.661 km S of Adak, Alaska · 19402 days ago · 53 km deep · 13 km away
- 4.954 km S of Adak, Alaska · 19401 days ago · 51 km deep · 12 km away
- 4.779 km SE of Adak, Alaska · 19392 days ago · 40 km deep · 36 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000033k. Read Tue, Sep 29, 2026, 7:45 PM UTC.