M3.9 earthquake 44 km ENE of Adak, Alaska
A magnitude 3.9 earthquake struck 44 km ENE of Adak, Alaska on Wed, Apr 4, 1973, 10:30 PM GMT-11 (09:30 UTC), 59 km (37 mi) below the surface.
A larger quake followed: M4.0 48 km NW 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
- 3.9 (mb), minor
- Local time
- UTC
- 1973-04-05 09:30:38 UTC
- Depth
- 59.0 km (36.7 mi), shallow
- Epicenter
- 51.977° N, 176.006° 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
- 11
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.048 km NW of Adak, Alaska · 19522 days ago · 217 km deep · 78 km away
- 3.988 km NW of Atka, Alaska · 19511 days ago · 211 km deep · 94 km away
- 3.687 km NE of Adak, Alaska · 19510 days ago · 178 km deep · 56 km away
- 3.780 km NE of Adak, Alaska · 19505 days ago · 167 km deep · 48 km away
- 4.619 km S of Adak, Alaska · 19483 days ago · 56 km deep · 56 km away
- 4.685 km ESE of Adak, Alaska · 19477 days ago · 59 km deep · 49 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000018c. Read Tue, Sep 22, 2026, 5:37 AM UTC.