Alaska earthquakes

M4.8 earthquake 195 km SSW of Akhiok, Alaska

A magnitude 4.8 earthquake struck 195 km SSW of Akhiok, Alaska on Thu, Jul 29, 2021, 1:55 AM AKDT (09:55 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.6 181 km SE of Chignik, 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
4.8 (mb), light
Local time
UTC
2021-07-29 09:55:19 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
55.370° N, 155.547° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

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 7.7 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.14
Depth from
Operator assigned
Station coverage gap
81°
Stations used
38

Nearby

Within 100 km, magnitude 1.8 and up: at least 200 in the 60 days after this one and 40 in the 30 days before it.

After

  1. 4.1222 km SE of Chignik, Alaska · 1883 days ago · 7 km deep · 32 km away
  2. 3.2166 km SSE of Chignik, Alaska · 1883 days ago · 25 km deep · 93 km away
  3. 3.0162 km SE of Chignik, Alaska · 1883 days ago · 21 km deep · 93 km away
  4. 3.2135 km SE of Chignik, Alaska · 1883 days ago · 15 km deep · 82 km away
  5. 3.4166 km SE of Chignik, Alaska · 1883 days ago · 17 km deep · 77 km away
  6. 2.9187 km SSW of Akhiok, Alaska · 1883 days ago · 33 km deep · 20 km away
  7. 2.7155 km SE of Chignik, Alaska · 1883 days ago · 25 km deep · 95 km away
  8. 3.2151 km SE of Chignik, Alaska · 1883 days ago · 25 km deep · 64 km away
  9. 2.6168 km ESE of Chignik, Alaska · 1883 days ago · 6 km deep · 39 km away
  10. 2.6137 km ESE of Chignik, Alaska · 1883 days ago · 25 km deep · 68 km away
  11. 3.2137 km SE of Chignik, Alaska · 1883 days ago · 26 km deep · 86 km away
  12. 2.7164 km ESE of Chignik, Alaska · 1883 days ago · 20 km deep · 42 km away
  13. 2.6146 km ESE of Chignik, Alaska · 1883 days ago · 13 km deep · 60 km away
  14. 2.3110 km ESE of Chignik, Alaska · 1883 days ago · 5 km deep · 96 km away
  15. 2.9214 km SE of Chignik, Alaska · 1883 days ago · 3 km deep · 30 km away
  16. 3.5126 km SE of Chignik, Alaska · 1883 days ago · 11 km deep · 84 km away
  17. 3.6137 km SE of Chignik, Alaska · 1883 days ago · 25 km deep · 70 km away
  18. 2.8157 km SSE of Chignik, Alaska · 1883 days ago · 11 km deep · 95 km away
  19. 2.9169 km SW of Akhiok, Alaska · 1883 days ago · 24 km deep · 43 km away
  20. 4.5164 km ESE of Chignik, Alaska · 1883 days ago · 28 km deep · 47 km away
  21. 3.7182 km SSW of Akhiok, Alaska · 1883 days ago · 7 km deep · 21 km away
  22. 2.6134 km SE of Chignik, Alaska · 1883 days ago · 25 km deep · 73 km away
  23. 3.5160 km SSE of Chignik, Alaska · 1883 days ago · 12 km deep · 98 km away
  24. 3.3186 km SE of Chignik, Alaska · 1883 days ago · 20 km deep · 71 km away
  25. 2.5128 km SE of Chignik, Alaska · 1883 days ago · 9 km deep · 82 km away
  26. 3.0204 km SSW of Akhiok, Alaska · 1883 days ago · 37 km deep · 9 km away
  27. 3.0186 km SE of Chignik, Alaska · 1883 days ago · 41 km deep · 65 km away
  28. 2.8141 km SE of Chignik, Alaska · 1883 days ago · 13 km deep · 73 km away
  29. 2.8159 km SE of Chignik, Alaska · 1883 days ago · 34 km deep · 49 km away
  30. 3.6222 km SSW of Akhiok, Alaska · 1883 days ago · 20 km deep · 29 km away
  31. 2.7143 km SE of Chignik, Alaska · 1883 days ago · 17 km deep · 98 km away
  32. 2.9129 km SE of Chignik, Alaska · 1883 days ago · 4 km deep · 80 km away
  33. 2.6133 km SE of Chignik, Alaska · 1883 days ago · 17 km deep · 96 km away
  34. 3.6150 km SE of Chignik, Alaska · 1883 days ago · 23 km deep · 84 km away
  35. 2.8199 km SE of Chignik, Alaska · 1883 days ago · 13 km deep · 66 km away
  36. 3.1164 km SE of Chignik, Alaska · 1883 days ago · 27 km deep · 46 km away
  37. 4.5185 km SSW of Akhiok, Alaska · 1883 days ago · 37 km deep · 22 km away
  38. 5.3155 km SE of Chignik, Alaska · 1883 days ago · 36 km deep · 91 km away · tsunami flag
  39. 3.0163 km SSW of Akhiok, Alaska · 1883 days ago · 40 km deep · 34 km away
  40. 2.6151 km SE of Chignik, Alaska · 1883 days ago · 14 km deep · 74 km away
  41. 3.0152 km SE of Chignik, Alaska · 1883 days ago · 2 km deep · 71 km away
  42. 3.0159 km ESE of Chignik, Alaska · 1883 days ago · 9 km deep · 50 km away
  43. 2.5125 km SE of Chignik, Alaska · 1883 days ago · 10 km deep · 98 km away
  44. 3.5196 km SE of Chignik, Alaska · 1883 days ago · 35 km deep · 23 km away
  45. 2.4136 km SE of Chignik, Alaska · 1883 days ago · 10 km deep · 85 km away
  46. 4.2165 km SSW of Akhiok, Alaska · 1883 days ago · 15 km deep · 33 km away
  47. 4.0139 km SE of Chignik, Alaska · 1883 days ago · 24 km deep · 73 km away
  48. 2.7146 km SE of Chignik, Alaska · 1883 days ago · 19 km deep · 72 km away
  49. 2.8138 km SE of Chignik, Alaska · 1883 days ago · 24 km deep · 72 km away
  50. 3.0168 km SE of Chignik, Alaska · 1883 days ago · 20 km deep · 81 km away
  51. 2.7132 km SE of Chignik, Alaska · 1883 days ago · 26 km deep · 80 km away
  52. 4.2143 km SE of Chignik, Alaska · 1883 days ago · 40 km deep · 74 km away
  53. 3.0138 km SE of Chignik, Alaska · 1883 days ago · 25 km deep · 93 km away
  54. 2.9141 km SE of Chignik, Alaska · 1883 days ago · 16 km deep · 75 km away
  55. 3.7145 km SE of Chignik, Alaska · 1883 days ago · 20 km deep · 95 km away
  56. 3.5154 km SE of Chignik, Alaska · 1883 days ago · 21 km deep · 86 km away
  57. 2.5160 km SE of Chignik, Alaska · 1883 days ago · 21 km deep · 62 km away
  58. 3.3south of Alaska · 1883 days ago · 33 km deep · 16 km away
  59. 3.5165 km SE of Chignik, Alaska · 1883 days ago · 6 km deep · 48 km away
  60. 3.1163 km SE of Chignik, Alaska · 1883 days ago · 20 km deep · 79 km away

The first 60 of at least 200.

Before

  1. 4.6148 km SE of Chignik, Alaska · 1883 days ago · 41 km deep · 87 km away
  2. 4.3164 km SE of Chignik, Alaska · 1883 days ago · 17 km deep · 48 km away
  3. 3.3184 km SSW of Akhiok, Alaska · 1883 days ago · 35 km deep · 22 km away
  4. 3.3113 km SE of Chignik, Alaska · 1883 days ago · 20 km deep · 94 km away
  5. 3.0173 km ESE of Chignik, Alaska · 1883 days ago · 39 km deep · 33 km away
  6. 3.5161 km SE of Chignik, Alaska · 1883 days ago · 1 km deep · 90 km away
  7. 2.8124 km SE of Chignik, Alaska · 1883 days ago · 27 km deep · 95 km away
  8. 3.1215 km SE of Chignik, Alaska · 1883 days ago · 20 km deep · 33 km away
  9. 3.3166 km SE of Chignik, Alaska · 1883 days ago · 23 km deep · 73 km away
  10. 3.8157 km SE of Chignik, Alaska · 1883 days ago · 6 km deep · 53 km away
  11. 4.3172 km ESE of Chignik, Alaska · 1883 days ago · 23 km deep · 34 km away
  12. 4.2149 km SE of Chignik, Alaska · 1883 days ago · 28 km deep · 80 km away
  13. 4.2145 km SE of Chignik, Alaska · 1883 days ago · 18 km deep · 83 km away
  14. 3.5199 km SE of Chignik, Alaska · 1883 days ago · 10 km deep · 90 km away
  15. 4.6155 km SSE of Chignik, Alaska · 1883 days ago · 19 km deep · 97 km away
  16. 4.1135 km SE of Chignik, Alaska · 1883 days ago · 27 km deep · 95 km away
  17. 3.0147 km SE of Chignik, Alaska · 1883 days ago · 24 km deep · 82 km away
  18. 3.7137 km SE of Chignik, Alaska · 1883 days ago · 25 km deep · 70 km away
  19. 3.1165 km SE of Chignik, Alaska · 1883 days ago · 7 km deep · 81 km away
  20. 3.9160 km SE of Chignik, Alaska · 1883 days ago · 20 km deep · 52 km away

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From the USGS Earthquake Hazards Program and its partner networks, event us6000f069. Read Thu, Sep 24, 2026, 4:18 PM UTC.