Alaska earthquakes

M2.5 earthquake 125 km S of Atka, Alaska

A magnitude 2.5 earthquake struck 125 km S of Atka, Alaska on Fri, Sep 22, 2023, 12:57 PM HADT (21:57 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.6 63 km SE of Atka, Alaska. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.5 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-09-22 21:57:54 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
51.076° N, 173.951° 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
2.5ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.128 · 8 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 3.6 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
288°, poorly surrounded by stations
Stations used
13

Nearby

Within 100 km, magnitude 1.5 and up: 50 in the 60 days after this one and 33 in the 30 days before it.

After

  1. 3.043 km SE of Atka, Alaska · 1104 days ago · 10 km deep · 99 km away
  2. 2.799 km S of Atka, Alaska · 1103 days ago · 10 km deep · 32 km away
  3. 1.651 km SSW of Atka, Alaska · 1101 days ago · 40 km deep · 85 km away
  4. 2.0109 km S of Atka, Alaska · 1101 days ago · 3 km deep · 20 km away
  5. 1.652 km SSE of Atka, Alaska · 1100 days ago · 7 km deep · 73 km away
  6. 2.3109 km SSE of Atka, Alaska · 1100 days ago · 16 km deep · 28 km away
  7. 2.9184 km S of Atka, Alaska · 1100 days ago · 10 km deep · 59 km away
  8. 2.8182 km S of Atka, Alaska · 1099 days ago · 10 km deep · 59 km away
  9. 2.939 km SSW of Atka, Alaska · 1098 days ago · 62 km deep · 93 km away
  10. 2.979 km SSE of Atka, Alaska · 1096 days ago · 35 km deep · 49 km away
  11. 2.574 km S of Atka, Alaska · 1096 days ago · 35 km deep · 52 km away
  12. 2.8184 km SSE of Atka, Alaska · 1096 days ago · 39 km deep · 77 km away
  13. 2.3100 km SSE of Atka, Alaska · 1095 days ago · 7 km deep · 43 km away
  14. 1.957 km SW of Atka, Alaska · 1094 days ago · 38 km deep · 96 km away
  15. 1.966 km SW of Atka, Alaska · 1091 days ago · 29 km deep · 95 km away
  16. 3.0103 km SSW of Atka, Alaska · 1090 days ago · 35 km deep · 85 km away
  17. 3.245 km SE of Atka, Alaska · 1089 days ago · 10 km deep · 99 km away
  18. 3.579 km SE of Atka, Alaska · 1089 days ago · 35 km deep · 78 km away
  19. 2.578 km SW of Atka, Alaska · 1088 days ago · 35 km deep · 94 km away
  20. 1.854 km SSW of Atka, Alaska · 1088 days ago · 14 km deep · 91 km away
  21. 2.636 km S of Atka, Alaska · 1087 days ago · 66 km deep · 89 km away
  22. 1.960 km SE of Atka, Alaska · 1087 days ago · 55 km deep · 93 km away
  23. 2.1160 km S of Atka, Alaska · 1087 days ago · 4 km deep · 35 km away
  24. 3.549 km SE of Atka, Alaska · 1087 days ago · 5 km deep · 94 km away
  25. 3.259 km SE of Atka, Alaska · 1081 days ago · 26 km deep · 97 km away
  26. 2.7151 km S of Atka, Alaska · 1078 days ago · 10 km deep · 28 km away
  27. 1.952 km SSW of Atka, Alaska · 1077 days ago · 37 km deep · 94 km away
  28. 2.7193 km S of Atka, Alaska · 1074 days ago · 10 km deep · 70 km away
  29. 2.7186 km SE of Atka, Alaska · 1073 days ago · 10 km deep · 98 km away
  30. 2.151 km SE of Atka, Alaska · 1073 days ago · 24 km deep · 83 km away
  31. 2.2Andreanof Islands, Aleutian Islands, Alaska · 1072 days ago · 21 km deep · 83 km away
  32. 2.5179 km S of Atka, Alaska · 1070 days ago · 10 km deep · 56 km away
  33. 3.663 km SE of Atka, Alaska · 1069 days ago · 35 km deep · 94 km away
  34. 2.752 km SSW of Atka, Alaska · 1067 days ago · 35 km deep · 81 km away
  35. 2.7164 km SSE of Atka, Alaska · 1066 days ago · 10 km deep · 50 km away
  36. 2.059 km SE of Atka, Alaska · 1065 days ago · 24 km deep · 86 km away
  37. 1.872 km SSW of Atka, Alaska · 1065 days ago · 15 km deep · 74 km away
  38. 2.958 km SE of Atka, Alaska · 1062 days ago · 17 km deep · 84 km away
  39. 3.2201 km SSW of Atka, Alaska · 1058 days ago · 24 km deep · 96 km away
  40. 2.678 km SE of Atka, Alaska · 1058 days ago · 35 km deep · 71 km away
  41. 2.9101 km SW of Atka, Alaska · 1058 days ago · 35 km deep · 95 km away
  42. 2.978 km SSE of Atka, Alaska · 1054 days ago · 35 km deep · 55 km away
  43. 3.236 km S of Atka, Alaska · 1053 days ago · 66 km deep · 90 km away
  44. 3.1155 km SSE of Atka, Alaska · 1053 days ago · 10 km deep · 60 km away
  45. 2.374 km SSE of Atka, Alaska · 1052 days ago · 18 km deep · 55 km away
  46. 3.245 km S of Atka, Alaska · 1050 days ago · 69 km deep · 80 km away
  47. 2.9169 km S of Atka, Alaska · 1050 days ago · 10 km deep · 45 km away
  48. 3.259 km SSE of Atka, Alaska · 1049 days ago · 35 km deep · 73 km away
  49. 2.3Andreanof Islands, Aleutian Islands, Alaska · 1049 days ago · 42 km deep · 76 km away
  50. 2.744 km S of Atka, Alaska · 1045 days ago · 140 km deep · 82 km away

Before

  1. 3.573 km S of Atka, Alaska · 1106 days ago · 44 km deep · 52 km away
  2. 2.9109 km SSW of Atka, Alaska · 1109 days ago · 35 km deep · 84 km away
  3. 3.245 km SE of Atka, Alaska · 1110 days ago · 10 km deep · 96 km away
  4. 2.3Andreanof Islands, Aleutian Islands, Alaska · 1112 days ago · 7 km deep · 89 km away
  5. 2.9198 km S of Atka, Alaska · 1113 days ago · 10 km deep · 82 km away
  6. 2.055 km S of Atka, Alaska · 1114 days ago · 18 km deep · 70 km away
  7. 2.652 km SSE of Atka, Alaska · 1116 days ago · 35 km deep · 74 km away
  8. 3.3188 km S of Atka, Alaska · 1118 days ago · 10 km deep · 65 km away
  9. 3.2170 km SSE of Atka, Alaska · 1119 days ago · 10 km deep · 65 km away
  10. 2.1156 km S of Atka, Alaska · 1120 days ago · 15 km deep · 33 km away
  11. 2.6196 km SSE of Atka, Alaska · 1121 days ago · 10 km deep · 71 km away
  12. 1.743 km SE of Atka, Alaska · 1121 days ago · 16 km deep · 94 km away
  13. 2.8169 km SSE of Atka, Alaska · 1122 days ago · 10 km deep · 45 km away
  14. 2.761 km SSE of Atka, Alaska · 1122 days ago · 35 km deep · 73 km away
  15. 2.475 km SE of Atka, Alaska · 1122 days ago · 26 km deep · 86 km away
  16. 3.683 km S of Atka, Alaska · 1122 days ago · 35 km deep · 48 km away
  17. 3.683 km S of Atka, Alaska · 1123 days ago · 39 km deep · 47 km away
  18. 3.648 km SE of Atka, Alaska · 1123 days ago · 14 km deep · 97 km away
  19. 1.953 km S of Atka, Alaska · 1123 days ago · 7 km deep · 76 km away
  20. 2.627 km S of Atka, Alaska · 1125 days ago · 78 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000ld95 (also filed as ak023c6m9eos). Read Thu, Oct 1, 2026, 6:49 AM UTC.