Alaska earthquakes

M3.7 earthquake 80 km S of Unalaska, Alaska

A magnitude 3.7 earthquake struck 80 km S of Unalaska, Alaska on Sat, Mar 25, 2023, 12:33 AM AKDT (08:33 UTC), 36 km (22 mi) below the surface.

A larger quake followed: M4.9 59 km WSW of Unalaska, Alaska. This one was a foreshock.

Unalaska forecastMore in Alaska

Map

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

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The earthquake

Magnitude
3.7 (mb), minor
Local time
UTC
2023-03-25 08:33:13 UTC
Depth
35.6 km (22.1 mi), shallow
Epicenter
53.157° N, 166.740° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

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, 11.2 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
202°, poorly surrounded by stations
Stations used
51

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and 56 in the 30 days before it.

After

  1. 2.269 km SW of Unalaska, Alaska · 1286 days ago · 102 km deep · 54 km away
  2. 2.120 km SSE of Unalaska, Alaska · 1284 days ago · 79 km deep · 63 km away
  3. 2.54 km SW of Unalaska, Alaska · 1284 days ago · 9 km deep · 77 km away
  4. 2.234 km SW of Unalaska, Alaska · 1284 days ago · 107 km deep · 58 km away
  5. 1.52 km WSW of Dutch Harbor, Alaska · 1284 days ago · 7 km deep · 81 km away
  6. 1.53 km WSW of Dutch Harbor, Alaska · 1284 days ago · 6 km deep · 81 km away
  7. 2.23 km W of Dutch Harbor, Alaska · 1284 days ago · 5 km deep · 81 km away
  8. 2.21 km WSW of Dutch Harbor, Alaska · 1284 days ago · 5 km deep · 82 km away
  9. 1.52 km WSW of Dutch Harbor, Alaska · 1284 days ago · 5 km deep · 81 km away
  10. 2.73 km SW of Unalaska, Alaska · 1283 days ago · 8 km deep · 78 km away
  11. 1.73 km WSW of Unalaska, Alaska · 1283 days ago · 4 km deep · 79 km away
  12. 2.03 km WSW of Dutch Harbor, Alaska · 1283 days ago · 6 km deep · 81 km away
  13. 1.8Fox Islands, Aleutian Islands, Alaska · 1283 days ago · 5 km deep · 80 km away
  14. 2.14 km WSW of Dutch Harbor, Alaska · 1283 days ago · 5 km deep · 80 km away
  15. 1.898 km E of Nikolski, Alaska · 1283 days ago · 26 km deep · 51 km away
  16. 2.471 km ESE of Nikolski, Alaska · 1283 days ago · 27 km deep · 96 km away
  17. 1.679 km S of Unalaska, Alaska · 1283 days ago · 26 km deep · 1 km away
  18. 1.669 km SE of Unalaska, Alaska · 1283 days ago · 29 km deep · 63 km away
  19. 1.766 km SE of Unalaska, Alaska · 1283 days ago · 30 km deep · 60 km away
  20. 1.974 km SSE of Akutan, Alaska · 1282 days ago · 24 km deep · 96 km away
  21. 1.6Fox Islands, Aleutian Islands, Alaska · 1282 days ago · 27 km deep · 50 km away
  22. 1.82 km W of Unalaska, Alaska · 1281 days ago · 6 km deep · 80 km away
  23. 1.91 km W of Unalaska, Alaska · 1281 days ago · 5 km deep · 81 km away
  24. 1.63 km W of Unalaska, Alaska · 1281 days ago · 7 km deep · 80 km away
  25. 1.72 km WSW of Dutch Harbor, Alaska · 1281 days ago · 6 km deep · 81 km away
  26. 1.72 km SW of Dutch Harbor, Alaska · 1281 days ago · 7 km deep · 81 km away
  27. 1.5Fox Islands, Aleutian Islands, Alaska · 1281 days ago · 5 km deep · 82 km away
  28. 1.5Fox Islands, Aleutian Islands, Alaska · 1281 days ago · 6 km deep · 82 km away
  29. 1.70 km W of Dutch Harbor, Alaska · 1280 days ago · 5 km deep · 82 km away
  30. 1.53 km WSW of Unalaska, Alaska · 1280 days ago · 6 km deep · 79 km away
  31. 1.63 km WSW of Dutch Harbor, Alaska · 1280 days ago · 5 km deep · 81 km away
  32. 3.5Fox Islands, Aleutian Islands, Alaska · 1280 days ago · 35 km deep · 51 km away
  33. 1.93 km W of Unalaska, Alaska · 1280 days ago · 6 km deep · 80 km away
  34. 2.096 km E of Nikolski, Alaska · 1280 days ago · 53 km deep · 50 km away
  35. 1.94 km ESE of Unalaska, Alaska · 1280 days ago · 11 km deep · 80 km away
  36. 1.83 km WSW of Dutch Harbor, Alaska · 1280 days ago · 7 km deep · 81 km away
  37. 1.73 km WSW of Dutch Harbor, Alaska · 1280 days ago · 6 km deep · 80 km away
  38. 2.04 km WSW of Dutch Harbor, Alaska · 1280 days ago · 5 km deep · 80 km away
  39. 1.93 km WSW of Dutch Harbor, Alaska · 1280 days ago · 7 km deep · 81 km away
  40. 1.53 km WSW of Dutch Harbor, Alaska · 1280 days ago · 5 km deep · 80 km away
  41. 3.092 km SW of Unalaska, Alaska · 1279 days ago · 94 km deep · 57 km away
  42. 1.9Fox Islands, Aleutian Islands, Alaska · 1279 days ago · 84 km deep · 59 km away
  43. 2.5Fox Islands, Aleutian Islands, Alaska · 1279 days ago · 35 km deep · 92 km away
  44. 1.93 km WSW of Dutch Harbor, Alaska · 1278 days ago · 5 km deep · 81 km away
  45. 1.5Fox Islands, Aleutian Islands, Alaska · 1278 days ago · 5 km deep · 79 km away
  46. 2.81 km SSW of Unalaska, Alaska · 1278 days ago · 7 km deep · 79 km away
  47. 1.53 km WSW of Dutch Harbor, Alaska · 1278 days ago · 5 km deep · 81 km away
  48. 1.53 km WSW of Unalaska, Alaska · 1278 days ago · 7 km deep · 79 km away
  49. 1.93 km W of Dutch Harbor, Alaska · 1278 days ago · 5 km deep · 81 km away
  50. 1.63 km WSW of Unalaska, Alaska · 1278 days ago · 6 km deep · 79 km away
  51. 1.5Fox Islands, Aleutian Islands, Alaska · 1278 days ago · 6 km deep · 81 km away
  52. 1.95 km WSW of Dutch Harbor, Alaska · 1278 days ago · 7 km deep · 80 km away
  53. 1.63 km WSW of Dutch Harbor, Alaska · 1278 days ago · 7 km deep · 81 km away
  54. 1.83 km WSW of Dutch Harbor, Alaska · 1278 days ago · 7 km deep · 81 km away
  55. 2.12 km WSW of Dutch Harbor, Alaska · 1278 days ago · 5 km deep · 81 km away
  56. 1.92 km WSW of Unalaska, Alaska · 1278 days ago · 5 km deep · 80 km away
  57. 1.63 km WSW of Dutch Harbor, Alaska · 1278 days ago · 6 km deep · 81 km away
  58. 1.83 km W of Unalaska, Alaska · 1278 days ago · 5 km deep · 80 km away
  59. 1.63 km W of Unalaska, Alaska · 1278 days ago · 8 km deep · 80 km away
  60. 1.55 km W of Dutch Harbor, Alaska · 1278 days ago · 6 km deep · 81 km away

The first 60 of at least 201.

Before

  1. 2.365 km SW of Unalaska, Alaska · 1286 days ago · 70 km deep · 47 km away
  2. 2.729 km ESE of Unalaska, Alaska · 1286 days ago · 73 km deep · 82 km away
  3. 2.0137 km S of Unalaska, Alaska · 1287 days ago · 26 km deep · 58 km away
  4. 2.5Fox Islands, Aleutian Islands, Alaska · 1287 days ago · 35 km deep · 6 km away
  5. 2.265 km SE of Unalaska, Alaska · 1288 days ago · 26 km deep · 69 km away
  6. 2.225 km SSW of Unalaska, Alaska · 1290 days ago · 71 km deep · 57 km away
  7. 2.253 km W of Dutch Harbor, Alaska · 1291 days ago · 79 km deep · 83 km away
  8. 1.513 km WSW of Unalaska, Alaska · 1291 days ago · 10 km deep · 74 km away
  9. 1.659 km SE of Unalaska, Alaska · 1291 days ago · 39 km deep · 75 km away
  10. 1.669 km SE of Unalaska, Alaska · 1291 days ago · 25 km deep · 78 km away
  11. 2.062 km SE of Unalaska, Alaska · 1292 days ago · 41 km deep · 72 km away
  12. 2.2Fox Islands, Aleutian Islands, Alaska · 1294 days ago · 26 km deep · 4 km away
  13. 3.481 km S of Unalaska, Alaska · 1294 days ago · 35 km deep · 1 km away
  14. 2.3116 km ESE of Nikolski, Alaska · 1294 days ago · 22 km deep · 91 km away
  15. 2.890 km ENE of Nikolski, Alaska · 1295 days ago · 80 km deep · 71 km away
  16. 2.6Fox Islands, Aleutian Islands, Alaska · 1295 days ago · 10 km deep · 63 km away
  17. 2.176 km SW of Unalaska, Alaska · 1296 days ago · 13 km deep · 56 km away
  18. 2.170 km SSW of Unalaska, Alaska · 1296 days ago · 47 km deep · 16 km away
  19. 2.070 km SE of Unalaska, Alaska · 1297 days ago · 21 km deep · 62 km away
  20. 2.379 km SSE of Akutan, Alaska · 1297 days ago · 26 km deep · 95 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000k0mf (also filed as ak0233v23pyw). Read Thu, Oct 1, 2026, 1:29 AM UTC.