Alaska earthquakes

M6.7 earthquake 52 km ESE of Adak, Alaska

A magnitude 6.7 earthquake struck 52 km ESE of Adak, Alaska on Thu, Nov 3, 1977, 10:52 PM GMT-11 (09:52 UTC), 33 km (21 mi) below the surface.

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The earthquake

Magnitude
6.7 (ms), strong
Local time
UTC
1977-11-04 09:52:55 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.659° N, 175.952° W
Region
Alaska
Strongest shaking
VI, strong shaking
Tsunami flag
No
Status
Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated
VI, strong shaking
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Depth from
OPERATOR_ASSIGNED
Stations used
267

Nearby

Within 100 km, magnitude 2.5 and up: 11 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 5.287 km ESE of Adak, Alaska · 17855 days ago · 33 km deep · 34 km away
  2. 4.7103 km ESE of Adak, Alaska · 17854 days ago · 33 km deep · 51 km away
  3. 5.489 km SE of Adak, Alaska · 17854 days ago · 33 km deep · 37 km away
  4. 5.683 km ESE of Adak, Alaska · 17853 days ago · 33 km deep · 31 km away
  5. 4.8109 km SE of Adak, Alaska · 17852 days ago · 33 km deep · 58 km away
  6. 4.368 km SSE of Adak, Alaska · 17811 days ago · 50 km deep · 45 km away
  7. 4.281 km SSE of Adak, Alaska · 17809 days ago · 44 km deep · 58 km away
  8. 5.176 km S of Adak, Alaska · 17809 days ago · 53 km deep · 62 km away
  9. 4.661 km SSE of Adak, Alaska · 17809 days ago · 54 km deep · 46 km away
  10. 4.065 km S of Adak, Alaska · 17809 days ago · 56 km deep · 58 km away
  11. 4.166 km SSE of Adak, Alaska · 17809 days ago · 53 km deep · 44 km away

Before

  1. 4.783 km S of Adak, Alaska · 17879 days ago · 33 km deep · 84 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000rc6 (also filed as gcmtc110477a, ushis3455, gcmt19771104095255, atlas19771104095258, iscgem689885). Read Tue, Sep 22, 2026, 9:32 PM UTC.