Alaska earthquakes

M4.0 earthquake 155 km ESE of Atka, Alaska

A magnitude 4.0 earthquake struck 155 km ESE of Atka, Alaska on Mon, Sep 2, 2024, 5:15 PM HADT (02:15 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M5.0 174 km SW of Nikolski, 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
4.0 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2024-09-03 02:15:08 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.785° N, 172.040° 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
4.0mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.087 · 35 stations
3.5ML, 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 6.7 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
182°, poorly surrounded by stations
Stations used
75

Nearby

Within 100 km, magnitude 1.5 and up: 27 in the 60 days after this one and 20 in the 30 days before it.

After

  1. 3.2168 km SW of Nikolski, Alaska · 758 days ago · 35 km deep · 89 km away
  2. 2.760 km ESE of Atka, Alaska · 756 days ago · 64 km deep · 96 km away
  3. 3.0139 km E of Atka, Alaska · 756 days ago · 61 km deep · 48 km away
  4. 2.9191 km ESE of Atka, Alaska · 755 days ago · 35 km deep · 39 km away
  5. 3.6176 km WSW of Nikolski, Alaska · 753 days ago · 15 km deep · 83 km away
  6. 2.3169 km WSW of Nikolski, Alaska · 752 days ago · 62 km deep · 93 km away
  7. 2.8170 km SW of Nikolski, Alaska · 748 days ago · 35 km deep · 89 km away
  8. 3.8229 km SW of Nikolski, Alaska · 747 days ago · 10 km deep · 86 km away
  9. 2.270 km SE of Atka, Alaska · 747 days ago · 38 km deep · 92 km away
  10. 3.1173 km ESE of Atka, Alaska · 744 days ago · 10 km deep · 41 km away
  11. 3.5192 km ESE of Atka, Alaska · 743 days ago · 35 km deep · 41 km away
  12. 3.1173 km E of Atka, Alaska · 739 days ago · 90 km deep · 77 km away
  13. 2.8171 km WSW of Nikolski, Alaska · 738 days ago · 64 km deep · 80 km away
  14. 2.285 km SE of Atka, Alaska · 737 days ago · 29 km deep · 97 km away
  15. 3.174 km ESE of Atka, Alaska · 730 days ago · 27 km deep · 82 km away
  16. 2.390 km ESE of Atka, Alaska · 730 days ago · 14 km deep · 69 km away
  17. 2.869 km ESE of Atka, Alaska · 725 days ago · 71 km deep · 86 km away
  18. 5.0174 km SW of Nikolski, Alaska · 723 days ago · 35 km deep · 85 km away · tsunami flag
  19. 2.5100 km ESE of Atka, Alaska · 723 days ago · 35 km deep · 56 km away
  20. 2.656 km ESE of Atka, Alaska · 713 days ago · 10 km deep · 99 km away
  21. 2.9173 km ESE of Atka, Alaska · 710 days ago · 35 km deep · 25 km away
  22. 4.4157 km ENE of Atka, Alaska · 708 days ago · 112 km deep · 91 km away
  23. 3.381 km E of Atka, Alaska · 706 days ago · 6 km deep · 87 km away
  24. 3.467 km E of Atka, Alaska · 705 days ago · 9 km deep · 94 km away
  25. 2.071 km E of Atka, Alaska · 704 days ago · 6 km deep · 96 km away
  26. 3.9139 km E of Atka, Alaska · 702 days ago · 28 km deep · 54 km away
  27. 3.277 km E of Atka, Alaska · 702 days ago · 8 km deep · 93 km away

Before

  1. 3.2188 km SW of Nikolski, Alaska · 760 days ago · 35 km deep · 67 km away
  2. 2.966 km ESE of Atka, Alaska · 761 days ago · 10 km deep · 89 km away
  3. 2.498 km SE of Atka, Alaska · 763 days ago · 15 km deep · 73 km away
  4. 3.2147 km SE of Atka, Alaska · 763 days ago · 10 km deep · 72 km away
  5. 3.1120 km ESE of Atka, Alaska · 767 days ago · 10 km deep · 36 km away
  6. 2.058 km E of Atka, Alaska · 768 days ago · 85 km deep · 99 km away
  7. 2.366 km ESE of Atka, Alaska · 770 days ago · 31 km deep · 91 km away
  8. 2.366 km E of Atka, Alaska · 773 days ago · 2 km deep · 98 km away
  9. 2.066 km ESE of Atka, Alaska · 774 days ago · 4 km deep · 90 km away
  10. 3.4176 km WSW of Nikolski, Alaska · 776 days ago · 35 km deep · 76 km away
  11. 2.880 km E of Atka, Alaska · 778 days ago · 67 km deep · 77 km away
  12. 3.2173 km E of Atka, Alaska · 780 days ago · 32 km deep · 41 km away
  13. 1.8100 km SE of Atka, Alaska · 781 days ago · 31 km deep · 84 km away
  14. 2.1135 km ESE of Atka, Alaska · 781 days ago · 28 km deep · 21 km away
  15. 2.5238 km ESE of Atka, Alaska · 781 days ago · 10 km deep · 92 km away
  16. 2.170 km ESE of Atka, Alaska · 782 days ago · 56 km deep · 89 km away
  17. 3.1196 km SW of Nikolski, Alaska · 782 days ago · 10 km deep · 67 km away
  18. 2.989 km E of Atka, Alaska · 782 days ago · 6 km deep · 81 km away
  19. 3.085 km ESE of Atka, Alaska · 782 days ago · 35 km deep · 69 km away
  20. 3.0171 km SW of Nikolski, Alaska · 786 days ago · 10 km deep · 85 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000npfj (also filed as ak024bcj0tdg). Read Fri, Oct 2, 2026, 9:18 AM UTC.