Alaska earthquakes

M4.3 earthquake 203 km WSW of Adak, Alaska

A magnitude 4.3 earthquake struck 203 km WSW of Adak, Alaska on Thu, Dec 18, 1997, 12:22 AM HAST (10:22 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.4 273 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
4.3 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1997-12-18 10:22:10 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.357° N, 179.458° 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: 15 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 4.4180 km W of Adak, Alaska · 10513 days ago · 33 km deep · 57 km away
  2. 3.2137 km WSW of Adak, Alaska · 10511 days ago · 33 km deep · 67 km away
  3. 3.7287 km WSW of Adak, Alaska · 10511 days ago · 33 km deep · 84 km away
  4. 3.1260 km W of Adak, Alaska · 10507 days ago · 33 km deep · 71 km away
  5. 4.5278 km WSW of Adak, Alaska · 10494 days ago · 33 km deep · 74 km away
  6. 4.1282 km WSW of Adak, Alaska · 10494 days ago · 33 km deep · 78 km away
  7. 5.0278 km WSW of Adak, Alaska · 10494 days ago · 33 km deep · 75 km away
  8. 5.4273 km WSW of Adak, Alaska · 10494 days ago · 33 km deep · 70 km away
  9. 4.0261 km W of Adak, Alaska · 10494 days ago · 33 km deep · 72 km away
  10. 4.0281 km WSW of Adak, Alaska · 10494 days ago · 33 km deep · 85 km away
  11. 4.5216 km WSW of Adak, Alaska · 10484 days ago · 33 km deep · 19 km away
  12. 4.9123 km WSW of Adak, Alaska · 10479 days ago · 33 km deep · 91 km away
  13. 4.6133 km WSW of Adak, Alaska · 10465 days ago · 33 km deep · 83 km away
  14. 4.1210 km W of Adak, Alaska · 10462 days ago · 99 km deep · 43 km away
  15. 3.6195 km W of Adak, Alaska · 10457 days ago · 100 km deep · 28 km away

Before

  1. 4.2Rat Islands, Aleutian Islands, Alaska · 10515 days ago · 33 km deep · 99 km away
  2. 4.3Rat Islands, Aleutian Islands, Alaska · 10516 days ago · 33 km deep · 99 km away
  3. 5.0190 km WSW of Adak, Alaska · 10523 days ago · 33 km deep · 17 km away
  4. 4.7172 km WSW of Adak, Alaska · 10529 days ago · 33 km deep · 31 km away
  5. 4.3152 km SW of Adak, Alaska · 10531 days ago · 33 km deep · 79 km away
  6. 3.9190 km W of Adak, Alaska · 10537 days ago · 33 km deep · 28 km away
  7. 4.2137 km SW of Adak, Alaska · 10539 days ago · 33 km deep · 83 km away
  8. 4.5193 km W of Adak, Alaska · 10539 days ago · 131 km deep · 76 km away
  9. 4.7194 km WSW of Adak, Alaska · 10540 days ago · 33 km deep · 10 km away
  10. 4.5127 km WSW of Adak, Alaska · 10540 days ago · 33 km deep · 90 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0008cus. Read Thu, Oct 1, 2026, 11:22 PM UTC.