Alaska earthquakes

M6.3 earthquake 99 km SW of Atka, Alaska

A magnitude 6.3 earthquake struck 99 km SW of Atka, Alaska on Tue, Nov 6, 1973, 7:26 AM GMT-11 (18:26 UTC), 41 km (25 mi) below the surface.

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The earthquake

Magnitude
6.3 (ms), strong
Local time
UTC
1973-11-06 18:26:35 UTC
Depth
41.0 km (25.5 mi), shallow
Epicenter
51.579° N, 175.247° 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
183

Nearby

Within 100 km, magnitude 2.5 and up: 5 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 4.588 km WSW of Atka, Alaska · 19313 days ago · 49 km deep · 24 km away
  2. 4.092 km SW of Atka, Alaska · 19311 days ago · 49 km deep · 7 km away
  3. 3.9133 km SE of Adak, Alaska · 19310 days ago · 16 km deep · 55 km away
  4. 4.396 km ESE of Adak, Alaska · 19310 days ago · 39 km deep · 22 km away
  5. 3.982 km SE of Adak, Alaska · 19292 days ago · 19 km deep · 61 km away

Before

  1. 6.489 km ESE of Adak, Alaska · 19313 days ago · 34 km deep · 12 km away
  2. 4.131 km ESE of Adak, Alaska · 19315 days ago · 46 km deep · 70 km away
  3. 4.853 km S of Adak, Alaska · 19316 days ago · 58 km deep · 94 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000042j (also filed as ushis3254, iscgem754194). Read Tue, Sep 22, 2026, 8:52 AM UTC.