Alaska earthquakes

M4.2 earthquake 194 km WSW of Adak, Alaska

A magnitude 4.2 earthquake struck 194 km WSW of Adak, Alaska on Fri, Mar 21, 1997, 10:49 AM HAST (20:49 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M6.7 273 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
4.2 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1997-03-21 20:49:57 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.130° N, 179.162° 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.

Depth from
OPERATOR_ASSIGNED

Nearby

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

After

  1. 4.1163 km WSW of Adak, Alaska · 10782 days ago · 33 km deep · 33 km away
  2. 4.8112 km WSW of Adak, Alaska · 10781 days ago · 33 km deep · 82 km away
  3. 6.7273 km WSW of Adak, Alaska · 10781 days ago · 33 km deep · 92 km away
  4. 4.1280 km WSW of Adak, Alaska · 10781 days ago · 33 km deep · 91 km away
  5. 5.3280 km WSW of Adak, Alaska · 10781 days ago · 33 km deep · 96 km away
  6. 5.2282 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 98 km away
  7. 4.8282 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 95 km away
  8. 4.8281 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 98 km away
  9. 4.2283 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 100 km away
  10. 3.8Rat Islands, Aleutian Islands, Alaska · 10780 days ago · 33 km deep · 88 km away
  11. 4.4Rat Islands, Aleutian Islands, Alaska · 10780 days ago · 33 km deep · 96 km away
  12. 4.2285 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 95 km away
  13. 4.5278 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 91 km away
  14. 4.5277 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 91 km away
  15. 4.5283 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 94 km away
  16. 4.3276 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 90 km away
  17. 3.9277 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 93 km away
  18. 4.3284 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 92 km away
  19. 4.1274 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 85 km away
  20. 3.1293 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 100 km away
  21. 4.7281 km WSW of Adak, Alaska · 10779 days ago · 33 km deep · 98 km away
  22. 4.0269 km WSW of Adak, Alaska · 10779 days ago · 33 km deep · 86 km away
  23. 5.5115 km WSW of Adak, Alaska · 10776 days ago · 33 km deep · 79 km away
  24. 4.6252 km W of Adak, Alaska · 10759 days ago · 68 km deep · 94 km away
  25. 3.8193 km WSW of Adak, Alaska · 10745 days ago · 33 km deep · 18 km away
  26. 4.4194 km WSW of Adak, Alaska · 10745 days ago · 33 km deep · 13 km away
  27. 4.9184 km WSW of Adak, Alaska · 10745 days ago · 33 km deep · 16 km away
  28. 4.4243 km WSW of Adak, Alaska · 10745 days ago · 33 km deep · 66 km away
  29. 4.2196 km WSW of Adak, Alaska · 10745 days ago · 33 km deep · 12 km away
  30. 4.5179 km W of Adak, Alaska · 10734 days ago · 33 km deep · 86 km away

Before

  1. 3.8255 km W of Adak, Alaska · 10786 days ago · 33 km deep · 96 km away
  2. 3.4284 km WSW of Adak, Alaska · 10786 days ago · 33 km deep · 92 km away
  3. 3.3258 km WSW of Adak, Alaska · 10798 days ago · 115 km deep · 80 km away
  4. 4.8107 km WSW of Adak, Alaska · 10798 days ago · 56 km deep · 86 km away
  5. 4.8140 km WSW of Adak, Alaska · 10806 days ago · 33 km deep · 56 km away
  6. 3.3182 km WSW of Adak, Alaska · 10813 days ago · 33 km deep · 22 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0007z7m. Read Thu, Oct 1, 2026, 8:31 AM UTC.