Alaska earthquakes

M2.8 earthquake 275 km W of Adak, Alaska

A magnitude 2.8 earthquake struck 275 km W of Adak, Alaska on Wed, Oct 18, 2023, 8:09 PM GMT+12 (08:09 UTC), 75 km (47 mi) below the surface.

A larger quake followed: M5.1 Rat Islands, Aleutian Islands, Alaska. This one was a foreshock.

More in Alaska

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
2.8 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2023-10-18 08:09:34 UTC
Depth
75.0 km (46.6 mi), intermediate-depth
Epicenter
51.614° N, 179.403° 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
2.8ML, 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 14.6 km horizontally, 16.3 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
110°
Stations used
21

Nearby

Within 100 km, magnitude 1.5 and up: 129 in the 60 days after this one and 64 in the 30 days before it.

After

  1. 2.8Rat Islands, Aleutian Islands, Alaska · 1080 days ago · 118 km deep · 66 km away
  2. 3.2Rat Islands, Aleutian Islands, Alaska · 1080 days ago · 193 km deep · 98 km away
  3. 2.1Rat Islands, Aleutian Islands, Alaska · 1078 days ago · 5 km deep · 77 km away
  4. 3.0299 km WSW of Adak, Alaska · 1077 days ago · 26 km deep · 69 km away
  5. 2.3Rat Islands, Aleutian Islands, Alaska · 1077 days ago · 20 km deep · 66 km away
  6. 3.2Rat Islands, Aleutian Islands, Alaska · 1077 days ago · 26 km deep · 71 km away
  7. 2.8Rat Islands, Aleutian Islands, Alaska · 1076 days ago · 45 km deep · 48 km away
  8. 2.1183 km W of Adak, Alaska · 1076 days ago · 90 km deep · 92 km away
  9. 3.0Rat Islands, Aleutian Islands, Alaska · 1076 days ago · 31 km deep · 58 km away
  10. 3.3Rat Islands, Aleutian Islands, Alaska · 1076 days ago · 24 km deep · 66 km away
  11. 2.9Rat Islands, Aleutian Islands, Alaska · 1076 days ago · 27 km deep · 60 km away
  12. 3.9298 km WSW of Adak, Alaska · 1076 days ago · 35 km deep · 61 km away
  13. 2.9234 km W of Adak, Alaska · 1075 days ago · 173 km deep · 61 km away
  14. 2.9Rat Islands, Aleutian Islands, Alaska · 1075 days ago · 26 km deep · 67 km away
  15. 2.8291 km WSW of Adak, Alaska · 1075 days ago · 24 km deep · 64 km away
  16. 3.2298 km WSW of Adak, Alaska · 1075 days ago · 25 km deep · 61 km away
  17. 2.8Rat Islands, Aleutian Islands, Alaska · 1075 days ago · 10 km deep · 80 km away
  18. 2.6299 km WSW of Adak, Alaska · 1075 days ago · 10 km deep · 98 km away
  19. 2.9Rat Islands, Aleutian Islands, Alaska · 1075 days ago · 22 km deep · 73 km away
  20. 2.8297 km WSW of Adak, Alaska · 1075 days ago · 26 km deep · 67 km away
  21. 2.7Rat Islands, Aleutian Islands, Alaska · 1075 days ago · 24 km deep · 70 km away
  22. 2.6Rat Islands, Aleutian Islands, Alaska · 1075 days ago · 24 km deep · 81 km away
  23. 3.6184 km WSW of Adak, Alaska · 1074 days ago · 95 km deep · 94 km away
  24. 1.9Rat Islands, Aleutian Islands, Alaska · 1074 days ago · 71 km deep · 36 km away
  25. 2.8204 km W of Adak, Alaska · 1074 days ago · 92 km deep · 70 km away
  26. 2.8263 km WSW of Adak, Alaska · 1074 days ago · 25 km deep · 52 km away
  27. 2.5Rat Islands, Aleutian Islands, Alaska · 1074 days ago · 82 km deep · 57 km away
  28. 2.4Rat Islands, Aleutian Islands, Alaska · 1073 days ago · 83 km deep · 57 km away
  29. 3.3206 km W of Adak, Alaska · 1073 days ago · 106 km deep · 70 km away
  30. 3.3Rat Islands, Aleutian Islands, Alaska · 1073 days ago · 151 km deep · 98 km away
  31. 2.6Rat Islands, Aleutian Islands, Alaska · 1073 days ago · 94 km deep · 54 km away
  32. 3.2Rat Islands, Aleutian Islands, Alaska · 1072 days ago · 137 km deep · 97 km away
  33. 1.8212 km W of Adak, Alaska · 1072 days ago · 65 km deep · 63 km away
  34. 2.0202 km WSW of Adak, Alaska · 1072 days ago · 60 km deep · 78 km away
  35. 1.9237 km WSW of Adak, Alaska · 1072 days ago · 22 km deep · 60 km away
  36. 1.7Rat Islands, Aleutian Islands, Alaska · 1072 days ago · 70 km deep · 54 km away
  37. 1.9274 km W of Adak, Alaska · 1071 days ago · 54 km deep · 15 km away
  38. 2.9Rat Islands, Aleutian Islands, Alaska · 1071 days ago · 59 km deep · 68 km away
  39. 2.7Rat Islands, Aleutian Islands, Alaska · 1070 days ago · 112 km deep · 58 km away
  40. 2.7288 km WSW of Adak, Alaska · 1070 days ago · 58 km deep · 23 km away
  41. 1.8194 km WSW of Adak, Alaska · 1070 days ago · 23 km deep · 94 km away
  42. 1.9186 km W of Adak, Alaska · 1070 days ago · 74 km deep · 89 km away
  43. 2.6279 km W of Adak, Alaska · 1070 days ago · 151 km deep · 55 km away
  44. 2.7224 km WSW of Adak, Alaska · 1069 days ago · 25 km deep · 77 km away
  45. 2.9Rat Islands, Aleutian Islands, Alaska · 1068 days ago · 35 km deep · 67 km away
  46. 3.0Rat Islands, Aleutian Islands, Alaska · 1068 days ago · 107 km deep · 68 km away
  47. 3.7Rat Islands, Aleutian Islands, Alaska · 1068 days ago · 50 km deep · 81 km away
  48. 1.8Rat Islands, Aleutian Islands, Alaska · 1068 days ago · 66 km deep · 40 km away
  49. 3.0Rat Islands, Aleutian Islands, Alaska · 1067 days ago · 135 km deep · 95 km away
  50. 1.7Rat Islands, Aleutian Islands, Alaska · 1067 days ago · 7 km deep · 83 km away
  51. 2.7250 km W of Adak, Alaska · 1067 days ago · 166 km deep · 40 km away
  52. 2.8Rat Islands, Aleutian Islands, Alaska · 1067 days ago · 131 km deep · 46 km away
  53. 1.6274 km W of Adak, Alaska · 1067 days ago · 15 km deep · 20 km away
  54. 3.1246 km W of Adak, Alaska · 1066 days ago · 184 km deep · 47 km away
  55. 2.3299 km WSW of Adak, Alaska · 1066 days ago · 23 km deep · 59 km away
  56. 2.1276 km WSW of Adak, Alaska · 1066 days ago · 15 km deep · 72 km away
  57. 1.8235 km WSW of Adak, Alaska · 1066 days ago · 18 km deep · 56 km away
  58. 1.9Rat Islands, Aleutian Islands, Alaska · 1065 days ago · 11 km deep · 84 km away
  59. 2.9197 km W of Adak, Alaska · 1065 days ago · 104 km deep · 77 km away
  60. 3.5233 km WSW of Adak, Alaska · 1065 days ago · 60 km deep · 56 km away

The first 60 of 129.

Before

  1. 3.3Rat Islands, Aleutian Islands, Alaska · 1081 days ago · 54 km deep · 55 km away
  2. 2.2201 km W of Adak, Alaska · 1081 days ago · 76 km deep · 74 km away
  3. 1.6Rat Islands, Aleutian Islands, Alaska · 1081 days ago · 47 km deep · 26 km away
  4. 1.8Rat Islands, Aleutian Islands, Alaska · 1081 days ago · 21 km deep · 51 km away
  5. 1.6260 km W of Adak, Alaska · 1081 days ago · 25 km deep · 15 km away
  6. 3.0286 km WSW of Adak, Alaska · 1082 days ago · 31 km deep · 23 km away
  7. 2.6186 km WSW of Adak, Alaska · 1084 days ago · 33 km deep · 96 km away
  8. 2.8Rat Islands, Aleutian Islands, Alaska · 1084 days ago · 105 km deep · 67 km away
  9. 3.1Rat Islands, Aleutian Islands, Alaska · 1088 days ago · 35 km deep · 73 km away
  10. 2.0Rat Islands, Aleutian Islands, Alaska · 1088 days ago · 20 km deep · 80 km away
  11. 2.8Rat Islands, Aleutian Islands, Alaska · 1088 days ago · 18 km deep · 36 km away
  12. 3.2Rat Islands, Aleutian Islands, Alaska · 1089 days ago · 139 km deep · 92 km away
  13. 1.9277 km W of Adak, Alaska · 1089 days ago · 59 km deep · 7 km away
  14. 3.8Rat Islands, Aleutian Islands, Alaska · 1089 days ago · 33 km deep · 28 km away
  15. 2.7Rat Islands, Aleutian Islands, Alaska · 1089 days ago · 100 km deep · 68 km away
  16. 3.4Rat Islands, Aleutian Islands, Alaska · 1090 days ago · 10 km deep · 30 km away
  17. 2.7Rat Islands, Aleutian Islands, Alaska · 1090 days ago · 65 km deep · 64 km away
  18. 2.0238 km WSW of Adak, Alaska · 1090 days ago · 15 km deep · 88 km away
  19. 2.1187 km W of Adak, Alaska · 1091 days ago · 74 km deep · 87 km away
  20. 4.2Rat Islands, Aleutian Islands, Alaska · 1092 days ago · 57 km deep · 62 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000l87b (also filed as ak023dde7gjk). Read Fri, Oct 2, 2026, 1:36 PM UTC.