M3.7 earthquake 80 km NE of Adak, Alaska
A magnitude 3.7 earthquake struck 80 km NE of Adak, Alaska on Fri, Apr 27, 1973, 3:30 PM GMT-11 (02:30 UTC), 167 km (104 mi) below the surface.
A larger quake followed: M4.6 19 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
- 3.7 (mb), minor
- Local time
- UTC
- 1973-04-28 02:30:32 UTC
- Depth
- 167.0 km (103.8 mi), intermediate-depth
- Epicenter
- 52.394° N, 175.822° 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: 4 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.619 km S of Adak, Alaska · 19483 days ago · 56 km deep · 97 km away
- 4.685 km ESE of Adak, Alaska · 19477 days ago · 59 km deep · 79 km away
- 5.518 km W of Adak, Alaska · 19449 days ago · 62 km deep · 94 km away
- 5.286 km NNW of Atka, Alaska · 19447 days ago · 207 km deep · 97 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00001m2. Read Tue, Sep 22, 2026, 6:06 AM UTC.