Alaska earthquakes

M4.3 earthquake 222 km SW of Adak, Alaska

A magnitude 4.3 earthquake struck 222 km SW of Adak, Alaska on Thu, Jan 23, 2020, 3:47 AM HAST (13:47 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M5.3 216 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 (ML, local (Richter)), light
Magnitude from
AV
Local time
UTC
2020-01-23 13:47:43 UTC
Depth
7.0 km (4.3 mi), shallow
Epicenter
50.314° N, 178.616° 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.

Location uncertainty
About 79.1 km horizontally, 72.8 km in depth
Magnitude uncertainty
±0.31
Depth from
From location
Station coverage gap
303°, poorly surrounded by stations
Stations used
20

Nearby

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 19 in the 30 days before it.

After

  1. 4.6230 km SSW of Adak, Alaska · 2437 days ago · 10 km deep · 66 km away
  2. 2.6149 km SW of Adak, Alaska · 2432 days ago · 10 km deep · 83 km away
  3. 2.3210 km WSW of Adak, Alaska · 2432 days ago · 5 km deep · 89 km away
  4. 2.2214 km WSW of Adak, Alaska · 2431 days ago · 13 km deep · 92 km away
  5. 2.1134 km SW of Adak, Alaska · 2429 days ago · 16 km deep · 95 km away
  6. 2.5188 km WSW of Adak, Alaska · 2420 days ago · 27 km deep · 92 km away
  7. 2.8219 km WSW of Adak, Alaska · 2420 days ago · 6 km deep · 76 km away
  8. 4.7133 km SW of Adak, Alaska · 2419 days ago · 35 km deep · 98 km away
  9. 2.8273 km SW of Adak, Alaska · 2419 days ago · 10 km deep · 63 km away
  10. 5.3216 km WSW of Adak, Alaska · 2415 days ago · 10 km deep · 74 km away · tsunami flag
  11. 4.6216 km WSW of Adak, Alaska · 2415 days ago · 10 km deep · 80 km away
  12. 2.9212 km WSW of Adak, Alaska · 2415 days ago · 10 km deep · 81 km away
  13. 3.3219 km WSW of Adak, Alaska · 2415 days ago · 10 km deep · 75 km away
  14. 2.5215 km WSW of Adak, Alaska · 2415 days ago · 10 km deep · 81 km away
  15. 2.8216 km WSW of Adak, Alaska · 2415 days ago · 9 km deep · 79 km away
  16. 2.0154 km WSW of Adak, Alaska · 2411 days ago · 25 km deep · 92 km away
  17. 2.6132 km SW of Adak, Alaska · 2403 days ago · 32 km deep · 97 km away
  18. 3.0280 km SW of Adak, Alaska · 2400 days ago · 10 km deep · 67 km away
  19. 2.8186 km WSW of Adak, Alaska · 2400 days ago · 30 km deep · 92 km away
  20. 2.8Andreanof Islands, Aleutian Islands, Alaska · 2400 days ago · 33 km deep · 95 km away
  21. 2.5172 km SSW of Adak, Alaska · 2399 days ago · 28 km deep · 72 km away
  22. 2.6249 km SSW of Adak, Alaska · 2395 days ago · 10 km deep · 37 km away
  23. 3.3256 km SW of Adak, Alaska · 2392 days ago · 10 km deep · 39 km away
  24. 2.0211 km WSW of Adak, Alaska · 2391 days ago · 10 km deep · 91 km away

Before

  1. 1.7146 km WSW of Adak, Alaska · 2445 days ago · 26 km deep · 98 km away
  2. 2.3138 km SW of Adak, Alaska · 2449 days ago · 19 km deep · 90 km away
  3. 3.0134 km SW of Adak, Alaska · 2451 days ago · 29 km deep · 95 km away
  4. 2.9256 km SW of Adak, Alaska · 2454 days ago · 10 km deep · 35 km away
  5. 2.4159 km SW of Adak, Alaska · 2458 days ago · 21 km deep · 81 km away
  6. 2.0140 km SW of Adak, Alaska · 2459 days ago · 26 km deep · 97 km away
  7. 4.0149 km SW of Adak, Alaska · 2461 days ago · 10 km deep · 78 km away
  8. 2.4149 km WSW of Adak, Alaska · 2462 days ago · 24 km deep · 100 km away
  9. 2.1214 km WSW of Adak, Alaska · 2462 days ago · 7 km deep · 98 km away
  10. 4.8216 km WSW of Adak, Alaska · 2462 days ago · 27 km deep · 98 km away
  11. 2.4242 km SSW of Adak, Alaska · 2464 days ago · 20 km deep · 46 km away
  12. 2.8152 km SW of Adak, Alaska · 2464 days ago · 10 km deep · 80 km away
  13. 2.1171 km WSW of Adak, Alaska · 2464 days ago · 23 km deep · 89 km away
  14. 2.6135 km SW of Adak, Alaska · 2464 days ago · 30 km deep · 95 km away
  15. 2.5212 km WSW of Adak, Alaska · 2465 days ago · 23 km deep · 99 km away
  16. 4.8209 km WSW of Adak, Alaska · 2465 days ago · 41 km deep · 99 km away
  17. 4.3207 km WSW of Adak, Alaska · 2465 days ago · 44 km deep · 100 km away
  18. 1.7131 km SW of Adak, Alaska · 2465 days ago · 13 km deep · 99 km away
  19. 1.9132 km SW of Adak, Alaska · 2466 days ago · 21 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event av62128051. Read Fri, Oct 2, 2026, 12:34 PM UTC.