Alaska earthquakes

M4.6 earthquake 125 km SSE of Old Harbor, Alaska

A magnitude 4.6 earthquake struck 125 km SSE of Old Harbor, Alaska on Mon, Sep 1, 2025, 11:19 AM AKDT (19:19 UTC), 11 km (7 mi) below the surface.

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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
4.6 (ML, local (Richter)), light
Magnitude from
Alaska Earthquake Center
Local time
UTC
2025-09-01 19:19:10 UTC
Depth
11.1 km (6.9 mi), shallow
Epicenter
56.268° N, 152.173° 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
4.6ML, local (Richter)Alaska Earthquake CenterPreferred · Preliminary
4.8Mww, W-phase momentUSGS National Earthquake Information CenterReviewed · ±0.057 · 30 stations

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting
Reverse (thrust)
Moment magnitude
4.8 Mww
Nodal plane 1
Strike 258°, dip 21°, rake 117°
Nodal plane 2
Strike 49°, dip 72°, rake 80°

How well it is located

Reviewed by a seismologist.

Stations used
36

Nearest places

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

Nearby

Within 100 km, magnitude 1.6 and up: 25 in the 60 days after this one and 22 in the 30 days before it.

After

  1. 2.7116 km SSE of Old Harbor, Alaska · 398 days ago · 12 km deep · 13 km away
  2. 2.4112 km SSE of Old Harbor, Alaska · 398 days ago · 12 km deep · 13 km away
  3. 2.044 km S of Old Harbor, Alaska · 398 days ago · 26 km deep · 87 km away
  4. 3.0126 km SSE of Old Harbor, Alaska · 398 days ago · 10 km deep · 2 km away
  5. 2.4105 km SE of Old Harbor, Alaska · 398 days ago · 12 km deep · 20 km away
  6. 2.498 km SSE of Old Harbor, Alaska · 397 days ago · 12 km deep · 27 km away
  7. 2.2104 km SE of Old Harbor, Alaska · 397 days ago · 12 km deep · 21 km away
  8. 2.8112 km SE of Old Harbor, Alaska · 397 days ago · 12 km deep · 13 km away
  9. 2.3133 km SE of Old Harbor, Alaska · 397 days ago · 24 km deep · 9 km away
  10. 2.297 km SE of Old Harbor, Alaska · 396 days ago · 20 km deep · 31 km away
  11. 2.5127 km SSE of Old Harbor, Alaska · 396 days ago · 21 km deep · 6 km away
  12. 3.1134 km SSE of Old Harbor, Alaska · 396 days ago · 25 km deep · 12 km away
  13. 2.2109 km SE of Old Harbor, Alaska · 396 days ago · 25 km deep · 15 km away
  14. 3.5116 km SSE of Old Harbor, Alaska · 396 days ago · 25 km deep · 9 km away
  15. 3.5116 km SSE of Old Harbor, Alaska · 396 days ago · 5 km deep · 10 km away
  16. 3.3130 km SSE of Old Harbor, Alaska · 395 days ago · 20 km deep · 10 km away
  17. 2.985 km S of Old Harbor, Alaska · 393 days ago · 0 km deep · 60 km away
  18. 3.4112 km SE of Akhiok, Alaska · 391 days ago · 20 km deep · 61 km away
  19. 3.0113 km SSE of Akhiok, Alaska · 391 days ago · 23 km deep · 66 km away
  20. 3.3107 km SE of Akhiok, Alaska · 384 days ago · 18 km deep · 60 km away
  21. 4.6117 km SE of Old Harbor, Alaska · 382 days ago · 12 km deep · 9 km away · tsunami flag
  22. 3.0120 km SE of Old Harbor, Alaska · 382 days ago · 10 km deep · 6 km away
  23. 3.2142 km SE of Old Harbor, Alaska · 382 days ago · 10 km deep · 18 km away
  24. 2.546 km S of Old Harbor, Alaska · 382 days ago · 114 km deep · 86 km away
  25. 2.667 km S of Old Harbor, Alaska · 362 days ago · 129 km deep · 74 km away

Before

  1. 4.2142 km SSE of Old Harbor, Alaska · 398 days ago · 18 km deep · 18 km away · felt by 1
  2. 3.3129 km SSE of Old Harbor, Alaska · 398 days ago · 12 km deep · 6 km away
  3. 2.4122 km SSE of Old Harbor, Alaska · 398 days ago · 12 km deep · 6 km away
  4. 2.9102 km SSE of Old Harbor, Alaska · 398 days ago · 12 km deep · 33 km away
  5. 4.5137 km SSE of Old Harbor, Alaska · 398 days ago · 12 km deep · 12 km away · felt by 1
  6. 2.988 km SSE of Old Harbor, Alaska · 398 days ago · 11 km deep · 36 km away
  7. 3.2133 km SE of Old Harbor, Alaska · 398 days ago · 12 km deep · 11 km away
  8. 3.2113 km SE of Old Harbor, Alaska · 398 days ago · 12 km deep · 18 km away
  9. 3.2124 km SE of Old Harbor, Alaska · 398 days ago · 12 km deep · 3 km away
  10. 3.3127 km SE of Old Harbor, Alaska · 398 days ago · 12 km deep · 8 km away
  11. 2.138 km SE of Old Harbor, Alaska · 398 days ago · 10 km deep · 87 km away
  12. 2.6120 km SSE of Old Harbor, Alaska · 398 days ago · 11 km deep · 4 km away
  13. 4.9128 km SE of Old Harbor, Alaska · 398 days ago · 11 km deep · 9 km away
  14. 2.278 km SSE of Old Harbor, Alaska · 398 days ago · 11 km deep · 49 km away
  15. 2.8119 km SE of Old Harbor, Alaska · 398 days ago · 12 km deep · 10 km away
  16. 3.3Kodiak Island region, Alaska · 398 days ago · 12 km deep · 16 km away
  17. 3.2119 km SE of Old Harbor, Alaska · 398 days ago · 12 km deep · 14 km away
  18. 3.1123 km SE of Old Harbor, Alaska · 398 days ago · 12 km deep · 4 km away
  19. 4.6116 km SE of Old Harbor, Alaska · 398 days ago · 12 km deep · 11 km away
  20. 4.7134 km SSE of Old Harbor, Alaska · 398 days ago · 12 km deep · 10 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak025b7uk0fb (also filed as us7000qt4b). Read Sun, Oct 4, 2026, 4:20 PM UTC.