Alaska earthquakes

M3.1 earthquake 152 km SW of Adak, Alaska

A magnitude 3.1 earthquake struck 152 km SW of Adak, Alaska on Fri, Sep 11, 2026, 1:51 AM HADT (10:51 UTC), 19 km (12 mi) below the surface.

A larger quake followed: M4.3 151 km SW of Adak, 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
3.1 (ml), minor
Local time
UTC
2026-09-11 10:51:55 UTC
Depth
18.8 km (11.7 mi), shallow
Epicenter
51.087° N, 178.438° W
Region
Alaska
Strongest shaking
III, weak shaking
Tsunami flag
No
Status
Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated
III, weak shaking
Peak ground acceleration
1.3% of gravity
Peak ground velocity
0.2 cm/s
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS. If you felt it, tell the USGS: every report sharpens the shaking map.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 5.6 km horizontally, 3.0 km in depth
Magnitude uncertainty
±0.10
Station coverage gap
223°, poorly surrounded by stations
Stations used
24

Nearby

Within 100 km, magnitude 1.5 and up: 54 since this one and 108 in the 30 days before it.

After

  1. 4.3151 km SW of Adak, Alaska · 12 days ago · 14 km deep · 2 km away
  2. 3.1155 km SW of Adak, Alaska · 12 days ago · 20 km deep · 3 km away
  3. 2.7151 km SW of Adak, Alaska · 11 days ago · 20 km deep · 3 km away
  4. 2.5135 km SW of Adak, Alaska · 11 days ago · 24 km deep · 17 km away
  5. 2.5151 km SW of Adak, Alaska · 11 days ago · 30 km deep · 3 km away
  6. 2.5152 km SW of Adak, Alaska · 11 days ago · 17 km deep · 4 km away
  7. 2.4151 km SW of Adak, Alaska · 11 days ago · 27 km deep · 5 km away
  8. 2.0104 km WSW of Adak, Alaska · 11 days ago · 77 km deep · 60 km away
  9. 2.5152 km WSW of Adak, Alaska · 11 days ago · 35 km deep · 6 km away
  10. 2.8214 km WSW of Adak, Alaska · 11 days ago · 17 km deep · 66 km away
  11. 2.6174 km W of Adak, Alaska · 11 days ago · 88 km deep · 74 km away
  12. 2.568 km W of Adak, Alaska · 11 days ago · 100 km deep · 98 km away
  13. 2.6151 km WSW of Adak, Alaska · 11 days ago · 35 km deep · 6 km away
  14. 2.5149 km SW of Adak, Alaska · 11 days ago · 21 km deep · 5 km away
  15. 2.6222 km WSW of Adak, Alaska · 11 days ago · 9 km deep · 76 km away
  16. 2.6150 km SW of Adak, Alaska · 11 days ago · 15 km deep · 4 km away
  17. 2.287 km SW of Adak, Alaska · 11 days ago · 17 km deep · 68 km away
  18. 2.3149 km WSW of Adak, Alaska · 11 days ago · 26 km deep · 6 km away
  19. 3.5151 km SW of Adak, Alaska · 11 days ago · 19 km deep · 5 km away
  20. 2.4201 km WSW of Adak, Alaska · 11 days ago · 33 km deep · 68 km away
  21. 1.6126 km W of Adak, Alaska · 10 days ago · 22 km deep · 79 km away
  22. 1.970 km SW of Adak, Alaska · 10 days ago · 21 km deep · 86 km away
  23. 2.1116 km WSW of Adak, Alaska · 10 days ago · 17 km deep · 40 km away
  24. 2.5214 km SW of Adak, Alaska · 10 days ago · 12 km deep · 62 km away
  25. 1.7121 km WSW of Adak, Alaska · 10 days ago · 31 km deep · 44 km away
  26. 3.9150 km WSW of Adak, Alaska · 10 days ago · 39 km deep · 16 km away
  27. 2.4130 km WSW of Adak, Alaska · 10 days ago · 28 km deep · 24 km away
  28. 1.876 km SW of Adak, Alaska · 10 days ago · 34 km deep · 77 km away
  29. 1.873 km SSW of Adak, Alaska · 10 days ago · 50 km deep · 92 km away
  30. 2.7123 km SW of Adak, Alaska · 10 days ago · 21 km deep · 29 km away
  31. 2.1123 km SW of Adak, Alaska · 10 days ago · 23 km deep · 29 km away
  32. 2.1135 km SW of Adak, Alaska · 10 days ago · 23 km deep · 47 km away
  33. 3.5134 km SW of Adak, Alaska · 10 days ago · 20 km deep · 29 km away
  34. 2.2138 km SW of Adak, Alaska · 9 days ago · 27 km deep · 18 km away
  35. 2.3158 km SW of Adak, Alaska · 9 days ago · 15 km deep · 6 km away
  36. 2.0122 km SW of Adak, Alaska · 9 days ago · 36 km deep · 30 km away
  37. 2.077 km SSW of Adak, Alaska · 9 days ago · 32 km deep · 99 km away
  38. 2.1199 km W of Adak, Alaska · 9 days ago · 92 km deep · 99 km away
  39. 2.156 km SW of Adak, Alaska · 8 days ago · 18 km deep · 99 km away
  40. 2.5162 km SW of Adak, Alaska · 8 days ago · 42 km deep · 11 km away
  41. 3.0134 km SW of Adak, Alaska · 8 days ago · 15 km deep · 40 km away
  42. 2.7243 km WSW of Adak, Alaska · 8 days ago · 9 km deep · 100 km away
  43. 3.1113 km SW of Adak, Alaska · 7 days ago · 35 km deep · 40 km away
  44. 3.4160 km WSW of Adak, Alaska · 7 days ago · 35 km deep · 40 km away
  45. 2.4134 km WSW of Adak, Alaska · 6 days ago · 29 km deep · 36 km away
  46. 2.2103 km WSW of Adak, Alaska · 6 days ago · 20 km deep · 51 km away
  47. 3.0132 km WSW of Adak, Alaska · 6 days ago · 36 km deep · 25 km away
  48. 2.5135 km SW of Adak, Alaska · 6 days ago · 20 km deep · 17 km away
  49. 2.9125 km WSW of Adak, Alaska · 6 days ago · 11 km deep · 29 km away
  50. 2.8242 km SW of Adak, Alaska · 6 days ago · 5 km deep · 90 km away
  51. 2.4143 km SW of Adak, Alaska · 6 days ago · 33 km deep · 12 km away
  52. 2.2143 km W of Adak, Alaska · 5 days ago · 97 km deep · 66 km away
  53. 2.0133 km WSW of Adak, Alaska · 20 hr ago · 15 km deep · 61 km away
  54. 3.5148 km WSW of Adak, Alaska · 17 hr ago · 0 km deep · 20 km away

Before

  1. 5.3151 km WSW of Adak, Alaska · 12 days ago · 41 km deep · 16 km away · tsunami flag
  2. 2.9230 km WSW of Adak, Alaska · 12 days ago · 2 km deep · 81 km away
  3. 2.8128 km WSW of Adak, Alaska · 12 days ago · 9 km deep · 43 km away
  4. 2.892 km SSW of Adak, Alaska · 12 days ago · 13 km deep · 76 km away
  5. 2.598 km SW of Adak, Alaska · 12 days ago · 29 km deep · 68 km away
  6. 2.0130 km W of Adak, Alaska · 12 days ago · 22 km deep · 65 km away
  7. 2.1111 km WSW of Adak, Alaska · 12 days ago · 16 km deep · 48 km away
  8. 2.5111 km SW of Adak, Alaska · 12 days ago · 23 km deep · 44 km away
  9. 2.2109 km WSW of Adak, Alaska · 12 days ago · 37 km deep · 44 km away
  10. 2.5181 km WSW of Adak, Alaska · 13 days ago · 55 km deep · 54 km away
  11. 2.1137 km SW of Adak, Alaska · 13 days ago · 37 km deep · 19 km away
  12. 1.691 km W of Adak, Alaska · 13 days ago · 156 km deep · 94 km away
  13. 1.876 km WSW of Adak, Alaska · 13 days ago · 74 km deep · 77 km away
  14. 3.2155 km SW of Adak, Alaska · 13 days ago · 16 km deep · 2 km away
  15. 1.983 km SW of Adak, Alaska · 13 days ago · 38 km deep · 71 km away
  16. 2.0145 km SW of Adak, Alaska · 13 days ago · 21 km deep · 7 km away
  17. 2.6250 km SW of Adak, Alaska · 13 days ago · 1 km deep · 99 km away
  18. 2.160 km WSW of Adak, Alaska · 13 days ago · 79 km deep · 94 km away
  19. 2.4195 km WSW of Adak, Alaska · 13 days ago · 64 km deep · 72 km away
  20. 2.1148 km SW of Adak, Alaska · 14 days ago · 20 km deep · 4 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event aka2026sadhaz. Read Tue, Sep 22, 2026, 10:29 PM UTC.