Alaska earthquakes

M3.9 earthquake 133 km SE of Adak, Alaska

A magnitude 3.9 earthquake struck 133 km SE of Adak, Alaska on Thu, Nov 8, 1973, 11:39 AM GMT-11 (22:39 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M4.3 96 km ESE of Adak, Alaska. This one was a foreshock.

More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
3.9 (mb), minor
Local time
UTC
1973-11-08 22:39:34 UTC
Depth
16.0 km (9.9 mi), shallow
Epicenter
51.086° N, 175.178° 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
6

Nearby

Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.396 km ESE of Adak, Alaska · 19310 days ago · 39 km deep · 42 km away
  2. 3.982 km SE of Adak, Alaska · 19292 days ago · 19 km deep · 58 km away

Before

  1. 4.092 km SW of Atka, Alaska · 19311 days ago · 49 km deep · 60 km away
  2. 4.588 km WSW of Atka, Alaska · 19312 days ago · 49 km deep · 78 km away
  3. 6.399 km SW of Atka, Alaska · 19312 days ago · 41 km deep · 55 km away
  4. 6.489 km ESE of Adak, Alaska · 19313 days ago · 34 km deep · 61 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000043a. Read Tue, Sep 22, 2026, 5:19 AM UTC.