Alaska earthquakes

M4.5 earthquake 88 km WSW of Atka, Alaska

A magnitude 4.5 earthquake struck 88 km WSW of Atka, Alaska on Tue, Nov 6, 1973, 7:39 AM GMT-11 (18:39 UTC), 49 km (30 mi) below the surface.

A larger quake followed: M4.6 75 km NW of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.5 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1973-11-06 18:39:47 UTC
Depth
49.0 km (30.4 mi), shallow
Epicenter
51.787° N, 175.310° 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
16

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.675 km NW of Atka, Alaska · 19323 days ago · 162 km deep · 93 km away
  2. 4.092 km SW of Atka, Alaska · 19322 days ago · 49 km deep · 20 km away
  3. 3.9133 km SE of Adak, Alaska · 19321 days ago · 16 km deep · 78 km away
  4. 4.396 km ESE of Adak, Alaska · 19321 days ago · 39 km deep · 41 km away
  5. 3.982 km SE of Adak, Alaska · 19303 days ago · 19 km deep · 74 km away
  6. 4.135 km NW of Atka, Alaska · 19286 days ago · 208 km deep · 82 km away

Before

  1. 6.399 km SW of Atka, Alaska · 19324 days ago · 41 km deep · 24 km away
  2. 6.489 km ESE of Adak, Alaska · 19324 days ago · 34 km deep · 20 km away
  3. 4.131 km ESE of Adak, Alaska · 19326 days ago · 46 km deep · 64 km away
  4. 4.853 km S of Adak, Alaska · 19327 days ago · 58 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000042k. Read Sat, Oct 3, 2026, 6:30 AM UTC.