Alaska earthquakes

M2.8 earthquake 198 km E of Atka, Alaska

A magnitude 2.8 earthquake struck 198 km E of Atka, Alaska on Thu, Jul 21, 2022, 9:46 PM HADT (06:46 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.6 185 km WSW of Nikolski, 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
2.8 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2022-07-22 06:46:07 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.901° N, 171.347° 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
2.8ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.091 · 16 stations
2.5ML, 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 4.6 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
216°, poorly surrounded by stations
Stations used
15

Nearby

Within 100 km, magnitude 1.5 and up: 31 in the 60 days after this one and 14 in the 30 days before it.

After

  1. 3.0127 km ENE of Atka, Alaska · 1531 days ago · 123 km deep · 95 km away
  2. 3.0168 km SW of Nikolski, Alaska · 1530 days ago · 35 km deep · 37 km away
  3. 2.5172 km SW of Nikolski, Alaska · 1530 days ago · 35 km deep · 32 km away
  4. 3.3Andreanof Islands, Aleutian Islands, Alaska · 1530 days ago · 35 km deep · 66 km away
  5. 3.2150 km ESE of Atka, Alaska · 1525 days ago · 35 km deep · 59 km away
  6. 4.4Fox Islands, Aleutian Islands, Alaska · 1524 days ago · 29 km deep · 38 km away
  7. 3.6178 km WSW of Nikolski, Alaska · 1524 days ago · 13 km deep · 54 km away
  8. 3.4182 km E of Atka, Alaska · 1523 days ago · 59 km deep · 31 km away
  9. 2.3135 km ESE of Atka, Alaska · 1522 days ago · 42 km deep · 64 km away
  10. 2.9179 km ESE of Atka, Alaska · 1521 days ago · 35 km deep · 33 km away
  11. 2.6121 km ESE of Atka, Alaska · 1517 days ago · 35 km deep · 98 km away
  12. 2.5176 km ESE of Atka, Alaska · 1517 days ago · 35 km deep · 24 km away
  13. 2.0165 km E of Atka, Alaska · 1517 days ago · 47 km deep · 35 km away
  14. 1.9132 km SE of Atka, Alaska · 1516 days ago · 38 km deep · 95 km away
  15. 3.3129 km WSW of Nikolski, Alaska · 1516 days ago · 35 km deep · 76 km away
  16. 4.6185 km WSW of Nikolski, Alaska · 1515 days ago · 31 km deep · 34 km away
  17. 3.1117 km E of Atka, Alaska · 1514 days ago · 10 km deep · 81 km away
  18. 2.8182 km WSW of Nikolski, Alaska · 1507 days ago · 35 km deep · 23 km away
  19. 2.5135 km SW of Nikolski, Alaska · 1506 days ago · 35 km deep · 73 km away
  20. 3.2169 km WSW of Nikolski, Alaska · 1503 days ago · 79 km deep · 41 km away
  21. 2.7100 km E of Atka, Alaska · 1503 days ago · 10 km deep · 99 km away
  22. 3.5120 km SW of Nikolski, Alaska · 1493 days ago · 35 km deep · 85 km away
  23. 2.9140 km ESE of Atka, Alaska · 1491 days ago · 54 km deep · 59 km away
  24. 3.6167 km E of Atka, Alaska · 1490 days ago · 64 km deep · 36 km away
  25. 2.4145 km ESE of Atka, Alaska · 1489 days ago · 35 km deep · 69 km away
  26. 2.7133 km E of Atka, Alaska · 1487 days ago · 62 km deep · 65 km away
  27. 3.0125 km ESE of Atka, Alaska · 1486 days ago · 35 km deep · 85 km away
  28. 3.5159 km WSW of Nikolski, Alaska · 1485 days ago · 35 km deep · 56 km away
  29. 3.4Andreanof Islands, Aleutian Islands, Alaska · 1484 days ago · 35 km deep · 99 km away
  30. 3.3169 km SE of Atka, Alaska · 1482 days ago · 35 km deep · 90 km away
  31. 3.7221 km SSW of Nikolski, Alaska · 1478 days ago · 10 km deep · 82 km away

Before

  1. 3.1183 km ESE of Atka, Alaska · 1535 days ago · 35 km deep · 20 km away
  2. 2.7183 km E of Atka, Alaska · 1541 days ago · 86 km deep · 63 km away
  3. 2.5112 km ESE of Atka, Alaska · 1542 days ago · 35 km deep · 87 km away
  4. 2.9173 km SSW of Nikolski, Alaska · 1543 days ago · 31 km deep · 81 km away
  5. 3.2Fox Islands, Aleutian Islands, Alaska · 1543 days ago · 10 km deep · 59 km away
  6. 3.4164 km WSW of Nikolski, Alaska · 1543 days ago · 10 km deep · 43 km away
  7. 2.8128 km ENE of Atka, Alaska · 1544 days ago · 88 km deep · 93 km away
  8. 3.5148 km SW of Nikolski, Alaska · 1546 days ago · 45 km deep · 57 km away
  9. 2.8Fox Islands, Aleutian Islands, Alaska · 1548 days ago · 35 km deep · 34 km away
  10. 2.3176 km SW of Nikolski, Alaska · 1548 days ago · 28 km deep · 33 km away
  11. 2.8176 km ESE of Atka, Alaska · 1549 days ago · 35 km deep · 25 km away
  12. 2.8113 km ESE of Atka, Alaska · 1552 days ago · 28 km deep · 94 km away
  13. 2.7Fox Islands, Aleutian Islands, Alaska · 1558 days ago · 51 km deep · 17 km away
  14. 2.8119 km E of Atka, Alaska · 1559 days ago · 213 km deep · 81 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000i58e (also filed as ak0229btxxdk). Read Fri, Oct 2, 2026, 8:18 PM UTC.