Alaska earthquakes

M4.5 earthquake 55 km E of Atka, Alaska

A magnitude 4.5 earthquake struck 55 km E of Atka, Alaska on Wed, Feb 15, 2017, 5:28 AM HAST (15:28 UTC), 100 km (62 mi) below the surface.

A larger quake followed: M5.2 56 km E of Atka, 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
4.5 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-02-15 15:28:16 UTC
Depth
100.4 km (62.4 mi), intermediate-depth
Epicenter
52.295° N, 173.402° W
Region
Alaska
Strongest shaking
III, weak shaking
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
4.5mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.045 · 142 stations
4.5mb, body-waveAlaska Earthquake CenterPreliminary

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
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.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 9.7 km horizontally, 7.9 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
138°
Stations used
181

Nearby

Within 100 km, magnitude 1.5 and up: 39 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 3.590 km SSE of Atka, Alaska · 3517 days ago · 43 km deep · 90 km away
  2. 2.660 km NNW of Atka, Alaska · 3516 days ago · 172 km deep · 88 km away
  3. 3.958 km E of Atka, Alaska · 3515 days ago · 69 km deep · 21 km away
  4. 3.682 km NNE of Atka, Alaska · 3514 days ago · 188 km deep · 59 km away
  5. 3.2104 km SE of Atka, Alaska · 3513 days ago · 10 km deep · 90 km away
  6. 3.1100 km SE of Atka, Alaska · 3513 days ago · 16 km deep · 86 km away
  7. 2.5103 km SE of Atka, Alaska · 3513 days ago · 33 km deep · 95 km away
  8. 2.6101 km SE of Atka, Alaska · 3513 days ago · 8 km deep · 89 km away
  9. 3.597 km SE of Atka, Alaska · 3513 days ago · 5 km deep · 87 km away
  10. 3.3137 km ENE of Atka, Alaska · 3513 days ago · 132 km deep · 82 km away
  11. 2.466 km SSE of Atka, Alaska · 3513 days ago · 56 km deep · 81 km away
  12. 3.056 km SSE of Atka, Alaska · 3509 days ago · 25 km deep · 70 km away
  13. 4.574 km NNW of Atka, Alaska · 3508 days ago · 192 km deep · 97 km away
  14. 5.256 km E of Atka, Alaska · 3503 days ago · 52 km deep · 14 km away · tsunami flag
  15. 2.862 km ESE of Atka, Alaska · 3503 days ago · 45 km deep · 38 km away
  16. 3.169 km ESE of Atka, Alaska · 3503 days ago · 55 km deep · 40 km away
  17. 1.944 km SW of Atka, Alaska · 3493 days ago · 78 km deep · 97 km away
  18. 1.843 km SSE of Atka, Alaska · 3490 days ago · 34 km deep · 68 km away
  19. 3.125 km ESE of Atka, Alaska · 3490 days ago · 92 km deep · 37 km away
  20. 2.498 km E of Atka, Alaska · 3489 days ago · 87 km deep · 45 km away
  21. 2.29 km SSE of Atka, Alaska · 3488 days ago · 68 km deep · 53 km away
  22. 2.2Andreanof Islands, Aleutian Islands, Alaska · 3488 days ago · 14 km deep · 49 km away
  23. 2.234 km WSW of Atka, Alaska · 3488 days ago · 95 km deep · 89 km away
  24. 2.242 km ENE of Atka, Alaska · 3483 days ago · 7 km deep · 15 km away
  25. 3.453 km NW of Atka, Alaska · 3482 days ago · 219 km deep · 90 km away
  26. 2.599 km NE of Atka, Alaska · 3481 days ago · 142 km deep · 67 km away
  27. 2.964 km NE of Atka, Alaska · 3481 days ago · 96 km deep · 28 km away
  28. 3.9104 km NE of Atka, Alaska · 3479 days ago · 184 km deep · 64 km away
  29. 2.722 km W of Atka, Alaska · 3478 days ago · 121 km deep · 77 km away
  30. 3.925 km NNW of Atka, Alaska · 3478 days ago · 222 km deep · 65 km away
  31. 4.369 km NNW of Atka, Alaska · 3475 days ago · 195 km deep · 99 km away
  32. 2.167 km SSE of Atka, Alaska · 3472 days ago · 46 km deep · 78 km away
  33. 1.940 km SSW of Atka, Alaska · 3471 days ago · 38 km deep · 81 km away
  34. 3.7113 km ESE of Atka, Alaska · 3470 days ago · 41 km deep · 72 km away
  35. 2.371 km E of Atka, Alaska · 3469 days ago · 5 km deep · 16 km away
  36. 1.945 km ESE of Atka, Alaska · 3469 days ago · 1 km deep · 27 km away
  37. 3.263 km SE of Atka, Alaska · 3469 days ago · 41 km deep · 57 km away
  38. 2.8102 km SE of Atka, Alaska · 3468 days ago · 17 km deep · 93 km away
  39. 2.539 km SW of Atka, Alaska · 3461 days ago · 8 km deep · 90 km away

Before

  1. 2.522 km SSE of Atka, Alaska · 3517 days ago · 0 km deep · 52 km away
  2. 3.235 km N of Atka, Alaska · 3517 days ago · 209 km deep · 59 km away
  3. 2.336 km ESE of Atka, Alaska · 3536 days ago · 5 km deep · 30 km away
  4. 2.343 km E of Atka, Alaska · 3539 days ago · 22 km deep · 17 km away
  5. 3.789 km SE of Atka, Alaska · 3541 days ago · 31 km deep · 77 km away
  6. 3.123 km NNW of Atka, Alaska · 3546 days ago · 134 km deep · 66 km away
  7. 2.799 km SE of Atka, Alaska · 3547 days ago · 34 km deep · 84 km away
  8. 2.881 km SE of Atka, Alaska · 3547 days ago · 32 km deep · 61 km away
  9. 2.9103 km SE of Atka, Alaska · 3547 days ago · 52 km deep · 86 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20008jzk (also filed as ak15272907, ak01724bti5q). Read Sat, Oct 3, 2026, 1:05 PM UTC.