Alaska earthquakes

M3.7 earthquake 145 km SE of Chignik, Alaska

A magnitude 3.7 earthquake struck 145 km SE of Chignik, Alaska on Thu, Jul 29, 2021, 11:29 AM AKDT (19:29 UTC), 20 km (12 mi) below the surface.

A larger quake followed: M6.9 125 km SE of Perryville, 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
3.7 (ml), minor
Local time
UTC
2021-07-29 19:29:34 UTC
Depth
20.0 km (12.4 mi), shallow
Epicenter
55.239° N, 157.037° 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 3.9 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.07
Depth from
Operator assigned
Station coverage gap
211°, poorly surrounded by stations
Stations used
37

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and at least 200 in the 30 days before it.

After

  1. 3.5154 km SE of Chignik, Alaska · 1883 days ago · 21 km deep · 11 km away
  2. 2.6125 km SSE of Perryville, Alaska · 1883 days ago · 14 km deep · 90 km away
  3. 2.5160 km SE of Chignik, Alaska · 1883 days ago · 21 km deep · 34 km away
  4. 2.066 km SE of Perryville, Alaska · 1883 days ago · 18 km deep · 93 km away
  5. 3.3south of Alaska · 1883 days ago · 33 km deep · 90 km away
  6. 3.5165 km SE of Chignik, Alaska · 1883 days ago · 6 km deep · 49 km away
  7. 3.191 km SSE of Chignik, Alaska · 1883 days ago · 11 km deep · 59 km away
  8. 3.1163 km SE of Chignik, Alaska · 1883 days ago · 20 km deep · 21 km away
  9. 5.0142 km SE of Chignik, Alaska · 1883 days ago · 29 km deep · 18 km away
  10. 5.4158 km SE of Chignik, Alaska · 1883 days ago · 21 km deep · 18 km away · felt by 1
  11. 3.1136 km SE of Perryville, Alaska · 1883 days ago · 25 km deep · 62 km away
  12. 2.057 km SE of Perryville, Alaska · 1883 days ago · 11 km deep · 100 km away
  13. 2.5135 km SSE of Perryville, Alaska · 1883 days ago · 28 km deep · 69 km away
  14. 4.7128 km SSE of Perryville, Alaska · 1883 days ago · 3 km deep · 70 km away
  15. 3.2145 km SSE of Chignik, Alaska · 1883 days ago · 10 km deep · 13 km away
  16. 3.4161 km SE of Chignik, Alaska · 1883 days ago · 17 km deep · 16 km away
  17. 3.6192 km SSW of Akhiok, Alaska · 1883 days ago · 40 km deep · 87 km away
  18. 4.4153 km SSE of Chignik, Alaska · 1883 days ago · 24 km deep · 13 km away
  19. 2.8137 km SSE of Chignik, Alaska · 1883 days ago · 26 km deep · 16 km away
  20. 3.0186 km SSW of Akhiok, Alaska · 1883 days ago · 19 km deep · 95 km away
  21. 4.8150 km SSE of Chignik, Alaska · 1883 days ago · 1 km deep · 11 km away
  22. 2.8146 km SE of Perryville, Alaska · 1883 days ago · 26 km deep · 44 km away
  23. 2.7138 km SE of Chignik, Alaska · 1883 days ago · 25 km deep · 11 km away
  24. 3.9153 km SE of Chignik, Alaska · 1883 days ago · 13 km deep · 40 km away
  25. 2.372 km ESE of Chignik, Alaska · 1883 days ago · 14 km deep · 83 km away
  26. 4.0153 km SSE of Chignik, Alaska · 1883 days ago · 16 km deep · 11 km away
  27. 2.7138 km SE of Perryville, Alaska · 1883 days ago · 17 km deep · 37 km away
  28. 2.6146 km SE of Perryville, Alaska · 1883 days ago · 35 km deep · 33 km away
  29. 2.7128 km SE of Perryville, Alaska · 1883 days ago · 30 km deep · 33 km away
  30. 3.1169 km ESE of Chignik, Alaska · 1883 days ago · 35 km deep · 75 km away
  31. 2.9167 km SE of Chignik, Alaska · 1883 days ago · 37 km deep · 59 km away
  32. 2.9200 km SE of Chignik, Alaska · 1883 days ago · 40 km deep · 57 km away
  33. 2.7150 km SE of Perryville, Alaska · 1883 days ago · 47 km deep · 39 km away
  34. 2.8185 km SE of Perryville, Alaska · 1883 days ago · 34 km deep · 52 km away
  35. 2.272 km SE of Perryville, Alaska · 1883 days ago · 20 km deep · 85 km away
  36. 2.4124 km SE of Perryville, Alaska · 1883 days ago · 45 km deep · 67 km away
  37. 4.2197 km ESE of Chignik, Alaska · 1883 days ago · 37 km deep · 86 km away
  38. 3.2149 km SE of Chignik, Alaska · 1883 days ago · 23 km deep · 41 km away
  39. 2.3139 km SSE of Perryville, Alaska · 1883 days ago · 45 km deep · 74 km away
  40. 2.198 km SE of Perryville, Alaska · 1883 days ago · 4 km deep · 69 km away
  41. 2.7139 km SE of Perryville, Alaska · 1883 days ago · 46 km deep · 58 km away
  42. 2.5128 km SE of Chignik, Alaska · 1883 days ago · 39 km deep · 18 km away
  43. 2.7143 km SE of Perryville, Alaska · 1883 days ago · 42 km deep · 31 km away
  44. 2.4128 km SE of Perryville, Alaska · 1883 days ago · 45 km deep · 59 km away
  45. 2.3130 km SSE of Chignik, Alaska · 1883 days ago · 53 km deep · 21 km away
  46. 2.2118 km SSE of Perryville, Alaska · 1883 days ago · 34 km deep · 80 km away
  47. 3.6204 km SE of Chignik, Alaska · 1883 days ago · 34 km deep · 61 km away
  48. 2.8199 km SE of Chignik, Alaska · 1883 days ago · 33 km deep · 83 km away
  49. 3.2152 km SSE of Chignik, Alaska · 1883 days ago · 41 km deep · 14 km away
  50. 2.5122 km SSE of Perryville, Alaska · 1883 days ago · 25 km deep · 73 km away
  51. 5.5140 km SE of Chignik, Alaska · 1883 days ago · 43 km deep · 12 km away · felt by 1
  52. 2.6160 km SSE of Chignik, Alaska · 1883 days ago · 37 km deep · 17 km away
  53. 3.2153 km SE of Chignik, Alaska · 1883 days ago · 35 km deep · 10 km away
  54. 2.368 km SE of Perryville, Alaska · 1883 days ago · 29 km deep · 91 km away
  55. 1.970 km SE of Perryville, Alaska · 1883 days ago · 48 km deep · 85 km away
  56. 3.0118 km SE of Perryville, Alaska · 1883 days ago · 46 km deep · 56 km away
  57. 2.7146 km SE of Chignik, Alaska · 1883 days ago · 19 km deep · 14 km away
  58. 2.5157 km SSE of Chignik, Alaska · 1883 days ago · 40 km deep · 14 km away
  59. 2.3137 km SE of Perryville, Alaska · 1883 days ago · 36 km deep · 44 km away
  60. 2.5108 km SSE of Perryville, Alaska · 1883 days ago · 29 km deep · 81 km away

The first 60 of at least 201.

Before

  1. 2.9141 km SE of Chignik, Alaska · 1883 days ago · 16 km deep · 29 km away
  2. 3.0138 km SE of Chignik, Alaska · 1883 days ago · 25 km deep · 9 km away
  3. 4.2143 km SE of Chignik, Alaska · 1883 days ago · 40 km deep · 28 km away
  4. 2.7132 km SE of Chignik, Alaska · 1883 days ago · 26 km deep · 36 km away
  5. 3.0168 km SE of Chignik, Alaska · 1883 days ago · 20 km deep · 24 km away
  6. 3.0138 km SSE of Perryville, Alaska · 1883 days ago · 37 km deep · 82 km away
  7. 2.8138 km SE of Chignik, Alaska · 1883 days ago · 24 km deep · 41 km away
  8. 2.6128 km SE of Perryville, Alaska · 1883 days ago · 27 km deep · 46 km away
  9. 3.2131 km SSE of Perryville, Alaska · 1883 days ago · 8 km deep · 91 km away
  10. 3.1155 km SSE of Chignik, Alaska · 1883 days ago · 43 km deep · 14 km away
  11. 2.7146 km SE of Chignik, Alaska · 1883 days ago · 19 km deep · 29 km away
  12. 2.873 km SE of Perryville, Alaska · 1883 days ago · 25 km deep · 87 km away
  13. 4.0139 km SE of Chignik, Alaska · 1883 days ago · 24 km deep · 37 km away
  14. 2.8106 km SSE of Perryville, Alaska · 1883 days ago · 20 km deep · 99 km away
  15. 2.4136 km SE of Chignik, Alaska · 1883 days ago · 10 km deep · 21 km away
  16. 3.5196 km SE of Chignik, Alaska · 1883 days ago · 35 km deep · 75 km away
  17. 2.6106 km SSE of Perryville, Alaska · 1883 days ago · 19 km deep · 94 km away
  18. 3.2113 km ESE of Perryville, Alaska · 1883 days ago · 12 km deep · 40 km away
  19. 3.3197 km SE of Perryville, Alaska · 1883 days ago · 25 km deep · 60 km away
  20. 2.5125 km SE of Chignik, Alaska · 1883 days ago · 10 km deep · 23 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f0bg. Read Thu, Sep 24, 2026, 5:51 PM UTC.