Alaska earthquakes

M3.1 earthquake 187 km SSW of Adak, Alaska

A magnitude 3.1 earthquake struck 187 km SSW of Adak, Alaska on Fri, Oct 21, 2022, 2:05 PM HADT (23:05 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.8 Andreanof Islands, Aleutian Islands, 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
3.1 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2022-10-21 23:05:02 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
50.332° N, 177.716° 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
3.1ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.097 · 14 stations
2.4ML, local (Richter)Alaska 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.

Location uncertainty
About 6.1 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
251°, poorly surrounded by stations
Stations used
18

Nearby

Within 100 km, magnitude 1.5 and up: 20 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 1.6Andreanof Islands, Aleutian Islands, Alaska · 1441 days ago · 21 km deep · 98 km away
  2. 2.7104 km SW of Adak, Alaska · 1441 days ago · 32 km deep · 90 km away
  3. 3.1122 km SW of Adak, Alaska · 1438 days ago · 35 km deep · 79 km away
  4. 2.9163 km SW of Adak, Alaska · 1429 days ago · 35 km deep · 98 km away
  5. 2.4215 km SSW of Adak, Alaska · 1428 days ago · 26 km deep · 43 km away
  6. 3.3128 km SSW of Adak, Alaska · 1416 days ago · 22 km deep · 65 km away
  7. 2.5111 km SW of Adak, Alaska · 1416 days ago · 35 km deep · 95 km away
  8. 3.4179 km SW of Adak, Alaska · 1412 days ago · 10 km deep · 97 km away
  9. 2.9246 km SSW of Adak, Alaska · 1412 days ago · 10 km deep · 59 km away
  10. 3.8Andreanof Islands, Aleutian Islands, Alaska · 1403 days ago · 21 km deep · 20 km away
  11. 3.2Andreanof Islands, Aleutian Islands, Alaska · 1397 days ago · 35 km deep · 91 km away
  12. 2.3128 km SW of Adak, Alaska · 1397 days ago · 22 km deep · 97 km away
  13. 2.6173 km SSW of Adak, Alaska · 1394 days ago · 10 km deep · 16 km away
  14. 2.8134 km SW of Adak, Alaska · 1393 days ago · 25 km deep · 95 km away
  15. 2.7155 km SW of Adak, Alaska · 1392 days ago · 35 km deep · 97 km away
  16. 2.3126 km SW of Adak, Alaska · 1391 days ago · 52 km deep · 83 km away
  17. 2.1138 km SW of Adak, Alaska · 1390 days ago · 26 km deep · 94 km away
  18. 2.1136 km SW of Adak, Alaska · 1390 days ago · 26 km deep · 97 km away
  19. 2.4Andreanof Islands, Aleutian Islands, Alaska · 1390 days ago · 86 km deep · 89 km away
  20. 2.1104 km SSW of Adak, Alaska · 1381 days ago · 44 km deep · 85 km away

Before

  1. 2.6Andreanof Islands, Aleutian Islands, Alaska · 1445 days ago · 35 km deep · 96 km away
  2. 2.2137 km SW of Adak, Alaska · 1445 days ago · 21 km deep · 97 km away
  3. 2.8177 km SSW of Adak, Alaska · 1445 days ago · 10 km deep · 35 km away
  4. 2.5171 km S of Adak, Alaska · 1446 days ago · 36 km deep · 68 km away
  5. 3.1133 km SW of Adak, Alaska · 1447 days ago · 35 km deep · 98 km away
  6. 1.6140 km SW of Adak, Alaska · 1451 days ago · 10 km deep · 63 km away
  7. 1.6103 km SW of Adak, Alaska · 1456 days ago · 26 km deep · 98 km away
  8. 2.1154 km S of Adak, Alaska · 1458 days ago · 13 km deep · 93 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000inpn (also filed as ak022dilq35p). Read Thu, Oct 1, 2026, 9:20 PM UTC.