Alaska earthquakes

M4.0 earthquake 297 km WSW of Adak, Alaska

A magnitude 4.0 earthquake struck 297 km WSW of Adak, Alaska on Tue, Apr 8, 1997, 8:30 AM GMT+12 (20:30 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M4.6 252 km W 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
4.0 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1997-04-07 20:30:30 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.220° N, 179.204° E
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: 5 in the 60 days after this one and 36 in the 30 days before it.

After

  1. 4.6252 km W of Adak, Alaska · 10760 days ago · 68 km deep · 58 km away
  2. 4.6Rat Islands, Aleutian Islands, Alaska · 10758 days ago · 33 km deep · 20 km away
  3. 3.9Rat Islands, Aleutian Islands, Alaska · 10755 days ago · 33 km deep · 33 km away
  4. 4.4243 km WSW of Adak, Alaska · 10745 days ago · 33 km deep · 54 km away
  5. 3.4Rat Islands, Aleutian Islands, Alaska · 10741 days ago · 33 km deep · 47 km away

Before

  1. 4.0269 km WSW of Adak, Alaska · 10779 days ago · 33 km deep · 29 km away
  2. 3.8Rat Islands, Aleutian Islands, Alaska · 10779 days ago · 33 km deep · 22 km away
  3. 4.7281 km WSW of Adak, Alaska · 10779 days ago · 33 km deep · 16 km away
  4. 3.1293 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 53 km away
  5. 4.1274 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 33 km away
  6. 4.3284 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 40 km away
  7. 3.9277 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 21 km away
  8. 4.3276 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 25 km away
  9. 4.5283 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 26 km away
  10. 4.5277 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 24 km away
  11. 4.0296 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 38 km away
  12. 4.0294 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 27 km away
  13. 4.5278 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 26 km away
  14. 4.3288 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 17 km away
  15. 4.2285 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 27 km away
  16. 5.6288 km WSW of Adak, Alaska · 10780 days ago · 33 km deep · 9 km away
  17. 4.4Rat Islands, Aleutian Islands, Alaska · 10780 days ago · 33 km deep · 20 km away
  18. 3.8Rat Islands, Aleutian Islands, Alaska · 10780 days ago · 33 km deep · 32 km away
  19. 3.3Rat Islands, Aleutian Islands, Alaska · 10781 days ago · 33 km deep · 13 km away
  20. 3.7286 km WSW of Adak, Alaska · 10781 days ago · 33 km deep · 12 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000804m. Read Thu, Oct 1, 2026, 4:56 PM UTC.