Alaska earthquakes

M3.0 earthquake 102 km SSE of Atka, Alaska

A magnitude 3.0 earthquake struck 102 km SSE of Atka, Alaska on Thu, May 21, 2020, 3:02 PM HADT (00:02 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M4.1 19 km SSE of Atka, 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
3.0 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2020-05-22 00:02:10 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
51.419° N, 173.413° 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
3.0ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.128 · 8 stations
2.5ML, 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 8.1 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
305°, poorly surrounded by stations
Stations used
19

Nearby

Within 100 km, magnitude 1.5 and up: 77 in the 60 days after this one and 24 in the 30 days before it.

After

  1. 2.788 km SSE of Atka, Alaska · 2327 days ago · 35 km deep · 18 km away
  2. 3.170 km E of Atka, Alaska · 2326 days ago · 167 km deep · 98 km away
  3. 1.747 km S of Atka, Alaska · 2323 days ago · 51 km deep · 65 km away
  4. 1.644 km E of Atka, Alaska · 2323 days ago · 13 km deep · 91 km away
  5. 1.86 km S of Atka, Alaska · 2322 days ago · 13 km deep · 97 km away
  6. 2.05 km S of Atka, Alaska · 2322 days ago · 12 km deep · 98 km away
  7. 2.965 km ESE of Atka, Alaska · 2321 days ago · 67 km deep · 67 km away
  8. 1.845 km SSW of Atka, Alaska · 2318 days ago · 26 km deep · 77 km away
  9. 1.9132 km SSE of Atka, Alaska · 2318 days ago · 14 km deep · 40 km away
  10. 1.873 km SE of Atka, Alaska · 2317 days ago · 12 km deep · 29 km away
  11. 2.9170 km SSE of Atka, Alaska · 2317 days ago · 10 km deep · 76 km away
  12. 2.0Andreanof Islands, Aleutian Islands, Alaska · 2316 days ago · 74 km deep · 70 km away
  13. 2.9178 km SE of Atka, Alaska · 2316 days ago · 10 km deep · 77 km away
  14. 1.988 km SE of Atka, Alaska · 2316 days ago · 8 km deep · 15 km away
  15. 1.9135 km ESE of Atka, Alaska · 2313 days ago · 36 km deep · 78 km away
  16. 1.641 km ESE of Atka, Alaska · 2311 days ago · 78 km deep · 70 km away
  17. 1.954 km SSW of Atka, Alaska · 2311 days ago · 22 km deep · 82 km away
  18. 1.852 km SSE of Atka, Alaska · 2309 days ago · 35 km deep · 50 km away
  19. 1.946 km SW of Atka, Alaska · 2308 days ago · 49 km deep · 94 km away
  20. 3.381 km ESE of Atka, Alaska · 2307 days ago · 10 km deep · 59 km away
  21. 1.764 km SSE of Atka, Alaska · 2305 days ago · 9 km deep · 48 km away
  22. 2.840 km SE of Atka, Alaska · 2305 days ago · 164 km deep · 63 km away
  23. 1.691 km S of Atka, Alaska · 2304 days ago · 40 km deep · 38 km away
  24. 1.962 km SSE of Atka, Alaska · 2303 days ago · 25 km deep · 45 km away
  25. 2.781 km SE of Atka, Alaska · 2303 days ago · 24 km deep · 40 km away
  26. 2.19 km SSW of Atka, Alaska · 2303 days ago · 161 km deep · 98 km away
  27. 1.864 km ESE of Atka, Alaska · 2301 days ago · 59 km deep · 54 km away
  28. 1.643 km SW of Atka, Alaska · 2300 days ago · 78 km deep · 94 km away
  29. 2.072 km SSE of Atka, Alaska · 2298 days ago · 5 km deep · 31 km away
  30. 2.8187 km SSE of Atka, Alaska · 2297 days ago · 8 km deep · 95 km away
  31. 2.135 km ENE of Atka, Alaska · 2296 days ago · 151 km deep · 97 km away
  32. 1.744 km E of Atka, Alaska · 2296 days ago · 7 km deep · 84 km away
  33. 1.683 km ESE of Atka, Alaska · 2295 days ago · 46 km deep · 49 km away
  34. 3.131 km ESE of Atka, Alaska · 2295 days ago · 120 km deep · 80 km away
  35. 1.566 km SSE of Atka, Alaska · 2295 days ago · 9 km deep · 43 km away
  36. 1.839 km ESE of Atka, Alaska · 2294 days ago · 71 km deep · 75 km away
  37. 1.686 km S of Atka, Alaska · 2294 days ago · 41 km deep · 63 km away
  38. 4.119 km SSE of Atka, Alaska · 2294 days ago · 59 km deep · 83 km away
  39. 3.5141 km SE of Atka, Alaska · 2294 days ago · 35 km deep · 59 km away
  40. 1.535 km S of Atka, Alaska · 2293 days ago · 24 km deep · 72 km away
  41. 2.973 km E of Atka, Alaska · 2293 days ago · 61 km deep · 81 km away
  42. 3.364 km SSW of Atka, Alaska · 2292 days ago · 35 km deep · 82 km away
  43. 2.0138 km S of Atka, Alaska · 2291 days ago · 7 km deep · 58 km away
  44. 2.0100 km ESE of Atka, Alaska · 2288 days ago · 39 km deep · 68 km away
  45. 2.9170 km S of Atka, Alaska · 2286 days ago · 10 km deep · 90 km away
  46. 1.987 km ESE of Atka, Alaska · 2285 days ago · 37 km deep · 50 km away
  47. 3.187 km ESE of Atka, Alaska · 2284 days ago · 170 km deep · 76 km away
  48. 2.848 km S of Atka, Alaska · 2283 days ago · 29 km deep · 74 km away
  49. 1.5Andreanof Islands, Aleutian Islands, Alaska · 2283 days ago · 24 km deep · 76 km away
  50. 2.099 km SSE of Atka, Alaska · 2282 days ago · 13 km deep · 31 km away
  51. 1.8154 km S of Atka, Alaska · 2281 days ago · 8 km deep · 81 km away
  52. 1.687 km SE of Atka, Alaska · 2281 days ago · 14 km deep · 43 km away
  53. 2.681 km SSW of Atka, Alaska · 2279 days ago · 28 km deep · 80 km away
  54. 1.59 km E of Atka, Alaska · 2279 days ago · 7 km deep · 96 km away
  55. 2.3165 km SSE of Atka, Alaska · 2279 days ago · 10 km deep · 69 km away
  56. 1.822 km SSE of Atka, Alaska · 2278 days ago · 91 km deep · 80 km away
  57. 2.627 km S of Atka, Alaska · 2277 days ago · 76 km deep · 84 km away
  58. 1.689 km SSW of Atka, Alaska · 2276 days ago · 38 km deep · 94 km away
  59. 1.784 km SSW of Atka, Alaska · 2276 days ago · 25 km deep · 95 km away
  60. 2.885 km SSW of Atka, Alaska · 2276 days ago · 35 km deep · 89 km away

The first 60 of 77.

Before

  1. 2.859 km ESE of Atka, Alaska · 2328 days ago · 6 km deep · 56 km away
  2. 2.989 km SSE of Atka, Alaska · 2328 days ago · 16 km deep · 14 km away
  3. 1.947 km SSW of Atka, Alaska · 2328 days ago · 28 km deep · 81 km away
  4. 2.2110 km SSE of Atka, Alaska · 2328 days ago · 4 km deep · 11 km away
  5. 2.868 km ESE of Atka, Alaska · 2329 days ago · 61 km deep · 49 km away
  6. 3.791 km SSE of Atka, Alaska · 2330 days ago · 42 km deep · 11 km away
  7. 2.678 km E of Atka, Alaska · 2330 days ago · 35 km deep · 87 km away
  8. 4.593 km SSE of Atka, Alaska · 2331 days ago · 28 km deep · 9 km away
  9. 2.6140 km S of Atka, Alaska · 2331 days ago · 10 km deep · 62 km away
  10. 1.672 km ESE of Atka, Alaska · 2333 days ago · 54 km deep · 56 km away
  11. 1.778 km SSE of Atka, Alaska · 2334 days ago · 25 km deep · 34 km away
  12. 1.67 km S of Atka, Alaska · 2334 days ago · 14 km deep · 96 km away
  13. 3.664 km ESE of Atka, Alaska · 2335 days ago · 73 km deep · 64 km away
  14. 3.14 km ESE of Atka, Alaska · 2343 days ago · 185 km deep · 99 km away
  15. 2.242 km ENE of Atka, Alaska · 2346 days ago · 121 km deep · 96 km away
  16. 3.777 km E of Atka, Alaska · 2346 days ago · 150 km deep · 94 km away
  17. 1.839 km E of Atka, Alaska · 2347 days ago · 5 km deep · 90 km away
  18. 1.974 km SE of Atka, Alaska · 2347 days ago · 106 km deep · 31 km away
  19. 1.659 km SSE of Atka, Alaska · 2348 days ago · 8 km deep · 50 km away
  20. 2.7104 km ESE of Atka, Alaska · 2349 days ago · 35 km deep · 52 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009mxa (also filed as ak0206khv3ga). Read Mon, Oct 5, 2026, 3:21 AM UTC.