M4.6 earthquake 61 km S of Adak, Alaska
A magnitude 4.6 earthquake struck 61 km S of Adak, Alaska on Thu, Aug 16, 1973, 8:15 AM GMT-10 (18:15 UTC), 53 km (33 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
- 4.6 (mb), light
- Local time
- UTC
- 1973-08-16 18:15:06 UTC
- Depth
- 53.0 km (32.9 mi), shallow
- Epicenter
- 51.322° N, 176.646° 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
- 15
Nearby
Within 100 km, magnitude 1.6 and up: 2 in the 60 days after this one and 6 in the 30 days before it.
After
- 4.954 km S of Adak, Alaska · 19401 days ago · 51 km deep · 7 km away
- 4.779 km SE of Adak, Alaska · 19391 days ago · 40 km deep · 49 km away
Before
- 4.161 km SSE of Adak, Alaska · 19401 days ago · 47 km deep · 13 km away
- 4.037 km SSE of Adak, Alaska · 19402 days ago · 55 km deep · 34 km away
- 5.647 km S of Adak, Alaska · 19402 days ago · 62 km deep · 14 km away
- 5.263 km S of Adak, Alaska · 19402 days ago · 48 km deep · 2 km away
- 5.865 km S of Adak, Alaska · 19402 days ago · 47 km deep · 4 km away
- 4.6104 km WSW of Adak, Alaska · 19412 days ago · 55 km deep · 100 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000033m. Read Tue, Sep 29, 2026, 3:33 AM UTC.