Alaska earthquakes

M4.9 earthquake 58 km WSW of Adak, Alaska

A magnitude 4.9 earthquake struck 58 km WSW of Adak, Alaska on Wed, Dec 11, 1996, 11:09 PM HAST (09:09 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.7 117 km WSW of Adak, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude
4.9 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1996-12-12 09:09:31 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
51.630° N, 177.381° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.ScaleComputed byNotes
4.9mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · 13 stations
4.9mb, body-waveAlaska Earthquake CenterPreliminary

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

Nearby

Within 100 km, magnitude 1.9 and up: 19 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 4.365 km WSW of Adak, Alaska · 10886 days ago · 10 km deep · 14 km away
  2. 4.659 km W of Adak, Alaska · 10886 days ago · 10 km deep · 29 km away
  3. 4.558 km WSW of Adak, Alaska · 10886 days ago · 10 km deep · 6 km away
  4. 3.255 km W of Adak, Alaska · 10886 days ago · 10 km deep · 19 km away
  5. 3.866 km WSW of Adak, Alaska · 10885 days ago · 10 km deep · 10 km away
  6. 3.156 km WSW of Adak, Alaska · 10885 days ago · 10 km deep · 13 km away
  7. 4.557 km W of Adak, Alaska · 10885 days ago · 10 km deep · 18 km away
  8. 4.562 km WSW of Adak, Alaska · 10885 days ago · 10 km deep · 5 km away
  9. 4.762 km WSW of Adak, Alaska · 10885 days ago · 10 km deep · 9 km away
  10. 4.552 km WSW of Adak, Alaska · 10885 days ago · 10 km deep · 10 km away
  11. 4.3138 km W of Adak, Alaska · 10881 days ago · 33 km deep · 86 km away
  12. 4.161 km W of Adak, Alaska · 10880 days ago · 10 km deep · 19 km away
  13. 4.726 km ESE of Adak, Alaska · 10878 days ago · 68 km deep · 80 km away
  14. 4.6139 km WSW of Adak, Alaska · 10870 days ago · 33 km deep · 84 km away
  15. 4.246 km SE of Adak, Alaska · 10868 days ago · 41 km deep · 80 km away
  16. 3.257 km S of Adak, Alaska · 10867 days ago · 50 km deep · 50 km away
  17. 4.347 km WSW of Adak, Alaska · 10861 days ago · 60 km deep · 11 km away
  18. 3.4141 km WSW of Adak, Alaska · 10855 days ago · 33 km deep · 85 km away
  19. 5.7117 km WSW of Adak, Alaska · 10848 days ago · 33 km deep · 60 km away

Before

  1. 3.348 km SSW of Adak, Alaska · 10887 days ago · 10 km deep · 36 km away
  2. 3.459 km W of Adak, Alaska · 10887 days ago · 10 km deep · 29 km away
  3. 3.761 km WSW of Adak, Alaska · 10887 days ago · 10 km deep · 5 km away
  4. 3.656 km W of Adak, Alaska · 10887 days ago · 10 km deep · 20 km away
  5. 4.860 km W of Adak, Alaska · 10887 days ago · 10 km deep · 25 km away
  6. 4.862 km W of Adak, Alaska · 10887 days ago · 10 km deep · 21 km away
  7. 4.561 km W of Adak, Alaska · 10887 days ago · 10 km deep · 23 km away
  8. 5.4Andreanof Islands, Aleutian Islands, Alaska · 10887 days ago · 10 km deep · 25 km away
  9. 5.033 km SE of Adak, Alaska · 10903 days ago · 48 km deep · 79 km away
  10. 4.5145 km WSW of Adak, Alaska · 10912 days ago · 33 km deep · 88 km away
  11. 4.8105 km SSW of Adak, Alaska · 10913 days ago · 33 km deep · 71 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0007uap (also filed as ak996fy0wbo9). Read Fri, Oct 2, 2026, 4:23 AM UTC.