Alaska earthquakes

M5.3 earthquake 128 km SE of Perryville, Alaska

A magnitude 5.3 earthquake struck 128 km SE of Perryville, Alaska on Wed, Jul 28, 2021, 10:28 PM AKDT (06:28 UTC), 35 km (22 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
5.3 (mb), moderate
Local time
UTC
2021-07-29 06:28:49 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
55.153° N, 157.603° 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 6.3 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.14
Depth from
Operator assigned
Station coverage gap
147°
Stations used
88

Nearest places

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

Nearby

Within 100 km, magnitude 2.3 and up: at least 202 in the 60 days after this one and 16 in the 30 days before it.

After

  1. 3.9118 km SE of Perryville, Alaska · 1883 days ago · 7 km deep · 14 km away
  2. 5.4154 km SE of Chignik, Alaska · 1883 days ago · 3 km deep · 54 km away · felt by 5
  3. 4.291 km SSE of Chignik, Alaska · 1883 days ago · 7 km deep · 45 km away
  4. 4.5136 km SE of Perryville, Alaska · 1883 days ago · 25 km deep · 17 km away
  5. 4.1113 km ESE of Chignik, Alaska · 1883 days ago · 46 km deep · 80 km away
  6. 4.3147 km SE of Chignik, Alaska · 1883 days ago · 38 km deep · 44 km away
  7. 4.8158 km SE of Perryville, Alaska · 1883 days ago · 34 km deep · 31 km away
  8. 3.4131 km SE of Chignik, Alaska · 1883 days ago · 10 km deep · 44 km away
  9. 3.7126 km SE of Chignik, Alaska · 1883 days ago · 24 km deep · 50 km away
  10. 4.5142 km SE of Perryville, Alaska · 1883 days ago · 25 km deep · 17 km away
  11. 4.8135 km SE of Perryville, Alaska · 1883 days ago · 26 km deep · 13 km away · felt by 7
  12. 3.7172 km SE of Chignik, Alaska · 1883 days ago · 11 km deep · 78 km away
  13. 2.562 km SE of Perryville, Alaska · 1883 days ago · 11 km deep · 66 km away
  14. 4.2142 km SE of Chignik, Alaska · 1883 days ago · 42 km deep · 65 km away
  15. 3.7113 km SSE of Perryville, Alaska · 1883 days ago · 40 km deep · 46 km away
  16. 4.3157 km SE of Chignik, Alaska · 1883 days ago · 25 km deep · 40 km away
  17. 3.8156 km SE of Chignik, Alaska · 1883 days ago · 27 km deep · 88 km away
  18. 3.1131 km ESE of Chignik, Alaska · 1883 days ago · 21 km deep · 91 km away
  19. 3.4126 km SE of Chignik, Alaska · 1883 days ago · 43 km deep · 31 km away
  20. 3.094 km SSE of Perryville, Alaska · 1883 days ago · 9 km deep · 55 km away
  21. 3.9105 km SSE of Perryville, Alaska · 1883 days ago · 19 km deep · 58 km away · felt by 1
  22. 3.3154 km SE of Chignik, Alaska · 1883 days ago · 4 km deep · 58 km away
  23. 3.5167 km SE of Chignik, Alaska · 1883 days ago · 14 km deep · 81 km away
  24. 3.294 km SSE of Perryville, Alaska · 1883 days ago · 7 km deep · 52 km away
  25. 3.4116 km SSE of Perryville, Alaska · 1883 days ago · 16 km deep · 35 km away
  26. 3.9141 km SE of Chignik, Alaska · 1883 days ago · 25 km deep · 72 km away
  27. 4.1131 km SE of Chignik, Alaska · 1883 days ago · 34 km deep · 49 km away · felt by 1
  28. 3.2106 km SSE of Perryville, Alaska · 1883 days ago · 8 km deep · 44 km away
  29. 3.5180 km SE of Chignik, Alaska · 1883 days ago · 41 km deep · 89 km away
  30. 4.3164 km SE of Chignik, Alaska · 1883 days ago · 20 km deep · 56 km away
  31. 4.5154 km SE of Perryville, Alaska · 1883 days ago · 12 km deep · 27 km away · felt by 1
  32. 3.9160 km SE of Chignik, Alaska · 1883 days ago · 20 km deep · 84 km away
  33. 3.1165 km SE of Chignik, Alaska · 1883 days ago · 7 km deep · 54 km away
  34. 3.0119 km SSE of Perryville, Alaska · 1883 days ago · 14 km deep · 48 km away
  35. 2.8157 km SE of Perryville, Alaska · 1883 days ago · 40 km deep · 37 km away
  36. 3.8122 km SSE of Perryville, Alaska · 1883 days ago · 10 km deep · 57 km away
  37. 3.2Alaska Peninsula · 1883 days ago · 5 km deep · 15 km away
  38. 4.4134 km SSE of Chignik, Alaska · 1883 days ago · 27 km deep · 19 km away
  39. 3.6131 km SE of Perryville, Alaska · 1883 days ago · 69 km deep · 3 km away
  40. 3.7137 km SE of Chignik, Alaska · 1883 days ago · 25 km deep · 84 km away
  41. 3.9135 km SE of Perryville, Alaska · 1883 days ago · 26 km deep · 7 km away
  42. 4.1107 km SE of Perryville, Alaska · 1883 days ago · 36 km deep · 22 km away
  43. 3.9142 km SE of Perryville, Alaska · 1883 days ago · 23 km deep · 14 km away
  44. 2.7104 km SSE of Perryville, Alaska · 1883 days ago · 10 km deep · 53 km away
  45. 3.0147 km SE of Chignik, Alaska · 1883 days ago · 24 km deep · 51 km away
  46. 4.1135 km SE of Chignik, Alaska · 1883 days ago · 27 km deep · 41 km away
  47. 4.6155 km SSE of Chignik, Alaska · 1883 days ago · 19 km deep · 37 km away
  48. 3.0106 km SE of Chignik, Alaska · 1883 days ago · 6 km deep · 63 km away
  49. 3.2100 km SE of Perryville, Alaska · 1883 days ago · 10 km deep · 28 km away
  50. 3.5199 km SE of Chignik, Alaska · 1883 days ago · 10 km deep · 74 km away
  51. 3.2Alaska Peninsula · 1883 days ago · 3 km deep · 52 km away
  52. 4.2145 km SE of Chignik, Alaska · 1883 days ago · 18 km deep · 50 km away
  53. 4.2149 km SE of Chignik, Alaska · 1883 days ago · 28 km deep · 53 km away
  54. 3.4147 km SE of Perryville, Alaska · 1883 days ago · 3 km deep · 38 km away
  55. 3.3122 km SE of Chignik, Alaska · 1883 days ago · 28 km deep · 35 km away
  56. 3.0117 km SSE of Perryville, Alaska · 1883 days ago · 24 km deep · 36 km away
  57. 3.8157 km SE of Chignik, Alaska · 1883 days ago · 6 km deep · 84 km away
  58. 3.3166 km SE of Chignik, Alaska · 1883 days ago · 23 km deep · 61 km away
  59. 2.6126 km SE of Perryville, Alaska · 1883 days ago · 27 km deep · 20 km away
  60. 3.5118 km SSE of Chignik, Alaska · 1883 days ago · 18 km deep · 33 km away

The first 60 of at least 202.

Before

  1. 4.5106 km SSE of Chignik, Alaska · 1883 days ago · 9 km deep · 33 km away
  2. 4.2159 km SE of Chignik, Alaska · 1883 days ago · 20 km deep · 59 km away
  3. 5.9127 km SE of Chignik, Alaska · 1883 days ago · 1 km deep · 35 km away · felt by 14
  4. 5.799 km ESE of Chignik, Alaska · 1883 days ago · 35 km deep · 89 km away
  5. 5.1114 km SE of Perryville, Alaska · 1883 days ago · 35 km deep · 14 km away
  6. 5.5106 km SSE of Perryville, Alaska · 1883 days ago · 18 km deep · 41 km away · felt by 3
  7. 8.22021 Chignik, Alaska Earthquake · 1883 days ago · 35 km deep · 30 km away · felt by 512 · PAGER yellow · tsunami flag
  8. 2.487 km SE of Perryville, Alaska · 1890 days ago · 15 km deep · 42 km away
  9. 2.8139 km SSE of Perryville, Alaska · 1894 days ago · 7 km deep · 47 km away
  10. 2.575 km SSE of Perryville, Alaska · 1896 days ago · 32 km deep · 61 km away
  11. 3.467 km SE of Perryville, Alaska · 1896 days ago · 5 km deep · 63 km away
  12. 2.6119 km SSE of Perryville, Alaska · 1898 days ago · 21 km deep · 61 km away
  13. 2.8135 km SE of Chignik, Alaska · 1898 days ago · 28 km deep · 32 km away
  14. 2.4150 km SE of Perryville, Alaska · 1904 days ago · 20 km deep · 34 km away
  15. 2.8125 km SE of Perryville, Alaska · 1906 days ago · 35 km deep · 9 km away
  16. 3.3141 km SE of Perryville, Alaska · 1906 days ago · 1 km deep · 20 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f2gk. Read Thu, Sep 24, 2026, 1:18 PM UTC.