Alaska earthquakes

M2.5 earthquake 240 km W of Adak, Alaska

A magnitude 2.5 earthquake struck 240 km W of Adak, Alaska on Sun, Nov 19, 2023, 3:49 PM GMT+12 (03:49 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.3 Rat 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
2.5 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-11-19 03:49:46 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
51.502° N, 179.933° E
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 · ±0.085 · 18 stations
2.2ML, 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 1.4 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
172°
Stations used
18

Nearby

Within 100 km, magnitude 1.5 and up: 73 in the 60 days after this one and 95 in the 30 days before it.

After

  1. 3.1239 km WSW of Adak, Alaska · 1050 days ago · 16 km deep · 43 km away
  2. 3.0205 km W of Adak, Alaska · 1049 days ago · 104 km deep · 46 km away
  3. 4.2Rat Islands, Aleutian Islands, Alaska · 1047 days ago · 76 km deep · 90 km away
  4. 2.9185 km WSW of Adak, Alaska · 1044 days ago · 79 km deep · 56 km away
  5. 3.6191 km W of Adak, Alaska · 1044 days ago · 83 km deep · 50 km away
  6. 3.1145 km W of Adak, Alaska · 1044 days ago · 98 km deep · 95 km away
  7. 3.8292 km WSW of Adak, Alaska · 1042 days ago · 35 km deep · 69 km away
  8. 3.6168 km WSW of Adak, Alaska · 1039 days ago · 28 km deep · 77 km away · felt by 1
  9. 2.7Rat Islands, Aleutian Islands, Alaska · 1039 days ago · 10 km deep · 89 km away
  10. 2.1160 km WSW of Adak, Alaska · 1037 days ago · 21 km deep · 82 km away
  11. 2.2165 km WSW of Adak, Alaska · 1037 days ago · 12 km deep · 76 km away
  12. 2.3192 km WSW of Adak, Alaska · 1036 days ago · 65 km deep · 48 km away
  13. 1.9299 km W of Adak, Alaska · 1034 days ago · 61 km deep · 64 km away
  14. 3.2Rat Islands, Aleutian Islands, Alaska · 1033 days ago · 66 km deep · 82 km away
  15. 2.7197 km WSW of Adak, Alaska · 1033 days ago · 72 km deep · 45 km away
  16. 2.2Rat Islands, Aleutian Islands, Alaska · 1032 days ago · 72 km deep · 100 km away
  17. 3.1Rat Islands, Aleutian Islands, Alaska · 1032 days ago · 75 km deep · 85 km away
  18. 2.0260 km WSW of Adak, Alaska · 1032 days ago · 21 km deep · 35 km away
  19. 1.9168 km WSW of Adak, Alaska · 1032 days ago · 25 km deep · 80 km away
  20. 2.8231 km W of Adak, Alaska · 1032 days ago · 131 km deep · 37 km away
  21. 3.1202 km WSW of Adak, Alaska · 1032 days ago · 21 km deep · 59 km away
  22. 2.6Rat Islands, Aleutian Islands, Alaska · 1032 days ago · 75 km deep · 84 km away
  23. 2.3297 km WSW of Adak, Alaska · 1032 days ago · 22 km deep · 63 km away
  24. 3.5174 km W of Adak, Alaska · 1031 days ago · 118 km deep · 72 km away
  25. 4.3Rat Islands, Aleutian Islands, Alaska · 1031 days ago · 35 km deep · 74 km away
  26. 4.0Rat Islands, Aleutian Islands, Alaska · 1031 days ago · 35 km deep · 72 km away
  27. 3.9Rat Islands, Aleutian Islands, Alaska · 1031 days ago · 35 km deep · 74 km away
  28. 2.8287 km WSW of Adak, Alaska · 1031 days ago · 19 km deep · 49 km away
  29. 3.5252 km WSW of Adak, Alaska · 1029 days ago · 35 km deep · 21 km away
  30. 3.8Rat Islands, Aleutian Islands, Alaska · 1029 days ago · 31 km deep · 93 km away
  31. 2.6209 km W of Adak, Alaska · 1027 days ago · 111 km deep · 48 km away
  32. 3.0Rat Islands, Aleutian Islands, Alaska · 1026 days ago · 92 km deep · 94 km away
  33. 2.4Rat Islands, Aleutian Islands, Alaska · 1026 days ago · 38 km deep · 83 km away
  34. 2.9143 km W of Adak, Alaska · 1025 days ago · 19 km deep · 98 km away
  35. 3.2Rat Islands, Aleutian Islands, Alaska · 1024 days ago · 65 km deep · 85 km away
  36. 3.0249 km WSW of Adak, Alaska · 1023 days ago · 70 km deep · 9 km away
  37. 3.0Rat Islands, Aleutian Islands, Alaska · 1021 days ago · 74 km deep · 98 km away
  38. 2.8192 km W of Adak, Alaska · 1020 days ago · 67 km deep · 49 km away
  39. 3.9235 km WSW of Adak, Alaska · 1020 days ago · 46 km deep · 52 km away
  40. 2.8168 km WSW of Adak, Alaska · 1020 days ago · 69 km deep · 73 km away
  41. 2.9207 km W of Adak, Alaska · 1018 days ago · 73 km deep · 34 km away
  42. 2.0211 km W of Adak, Alaska · 1017 days ago · 16 km deep · 44 km away
  43. 2.7208 km WSW of Adak, Alaska · 1017 days ago · 68 km deep · 32 km away
  44. 1.9253 km W of Adak, Alaska · 1016 days ago · 6 km deep · 45 km away
  45. 2.8229 km W of Adak, Alaska · 1015 days ago · 178 km deep · 85 km away
  46. 2.0Rat Islands, Aleutian Islands, Alaska · 1014 days ago · 18 km deep · 89 km away
  47. 2.6252 km W of Adak, Alaska · 1014 days ago · 81 km deep · 20 km away
  48. 2.4219 km WSW of Adak, Alaska · 1014 days ago · 9 km deep · 79 km away
  49. 2.3208 km WSW of Adak, Alaska · 1013 days ago · 33 km deep · 39 km away
  50. 2.2205 km WSW of Adak, Alaska · 1013 days ago · 34 km deep · 41 km away
  51. 3.3168 km WSW of Adak, Alaska · 1012 days ago · 28 km deep · 80 km away
  52. 3.2167 km WSW of Adak, Alaska · 1012 days ago · 26 km deep · 82 km away
  53. 2.4228 km WSW of Adak, Alaska · 1011 days ago · 60 km deep · 16 km away
  54. 2.7Rat Islands, Aleutian Islands, Alaska · 1010 days ago · 101 km deep · 80 km away
  55. 2.7200 km WSW of Adak, Alaska · 1010 days ago · 68 km deep · 42 km away
  56. 2.2153 km WSW of Adak, Alaska · 1009 days ago · 18 km deep · 92 km away
  57. 3.8Rat Islands, Aleutian Islands, Alaska · 1009 days ago · 57 km deep · 60 km away
  58. 2.1245 km WSW of Adak, Alaska · 1007 days ago · 11 km deep · 48 km away
  59. 2.8Rat Islands, Aleutian Islands, Alaska · 1006 days ago · 35 km deep · 94 km away
  60. 3.2237 km WSW of Adak, Alaska · 1003 days ago · 10 km deep · 52 km away

The first 60 of 73.

Before

  1. 2.3209 km W of Adak, Alaska · 1051 days ago · 71 km deep · 32 km away
  2. 2.1242 km W of Adak, Alaska · 1051 days ago · 6 km deep · 3 km away
  3. 2.6239 km WSW of Adak, Alaska · 1051 days ago · 10 km deep · 3 km away
  4. 2.1240 km W of Adak, Alaska · 1051 days ago · 7 km deep · 4 km away
  5. 2.2171 km WSW of Adak, Alaska · 1051 days ago · 24 km deep · 94 km away
  6. 3.1254 km WSW of Adak, Alaska · 1052 days ago · 26 km deep · 31 km away
  7. 2.7243 km WSW of Adak, Alaska · 1052 days ago · 9 km deep · 2 km away
  8. 2.1Andreanof Islands, Aleutian Islands, Alaska · 1052 days ago · 12 km deep · 94 km away
  9. 2.8243 km WSW of Adak, Alaska · 1052 days ago · 10 km deep · 6 km away
  10. 2.9156 km WSW of Adak, Alaska · 1052 days ago · 15 km deep · 94 km away
  11. 2.7Rat Islands, Aleutian Islands, Alaska · 1052 days ago · 68 km deep · 77 km away
  12. 1.9247 km W of Adak, Alaska · 1052 days ago · 23 km deep · 8 km away
  13. 2.1160 km WSW of Adak, Alaska · 1052 days ago · 15 km deep · 80 km away
  14. 2.1243 km W of Adak, Alaska · 1052 days ago · 7 km deep · 3 km away
  15. 1.9Rat Islands, Aleutian Islands, Alaska · 1053 days ago · 24 km deep · 7 km away
  16. 2.6241 km WSW of Adak, Alaska · 1053 days ago · 10 km deep · 3 km away
  17. 2.5241 km WSW of Adak, Alaska · 1053 days ago · 73 km deep · 1 km away
  18. 3.3Rat Islands, Aleutian Islands, Alaska · 1053 days ago · 35 km deep · 69 km away
  19. 3.2240 km W of Adak, Alaska · 1056 days ago · 74 km deep · 12 km away
  20. 2.8179 km WSW of Adak, Alaska · 1058 days ago · 18 km deep · 65 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000lgil (also filed as ak023eu8o00j). Read Sun, Oct 4, 2026, 3:34 PM UTC.