Alaska earthquakes

M4.8 earthquake 158 km SE of Perryville, Alaska

A magnitude 4.8 earthquake struck 158 km SE of Perryville, Alaska on Wed, Jul 28, 2021, 10:39 PM AKDT (06:39 UTC), 34 km (21 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
4.8 (mb), light
Local time
UTC
2021-07-29 06:39:15 UTC
Depth
33.6 km (20.9 mi), shallow
Epicenter
55.054° N, 157.140° 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 7.2 km horizontally, 11.5 km in depth
Magnitude uncertainty
±0.28
Depth from
From location
Station coverage gap
154°
Stations used
67

Nearest places

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

Nearby

Within 100 km, magnitude 1.8 and up: at least 202 in the 60 days after this one and 32 in the 30 days before it.

After

  1. 3.4131 km SE of Chignik, Alaska · 1884 days ago · 10 km deep · 38 km away
  2. 3.7126 km SE of Chignik, Alaska · 1884 days ago · 24 km deep · 46 km away
  3. 4.5142 km SE of Perryville, Alaska · 1884 days ago · 25 km deep · 27 km away
  4. 4.8135 km SE of Perryville, Alaska · 1884 days ago · 26 km deep · 32 km away · felt by 7
  5. 3.7172 km SE of Chignik, Alaska · 1884 days ago · 11 km deep · 53 km away
  6. 2.562 km SE of Perryville, Alaska · 1884 days ago · 11 km deep · 96 km away
  7. 4.2142 km SE of Chignik, Alaska · 1884 days ago · 42 km deep · 51 km away
  8. 3.7113 km SSE of Perryville, Alaska · 1884 days ago · 40 km deep · 73 km away
  9. 4.3157 km SE of Chignik, Alaska · 1884 days ago · 25 km deep · 14 km away
  10. 3.8156 km SE of Chignik, Alaska · 1884 days ago · 27 km deep · 70 km away
  11. 3.1131 km ESE of Chignik, Alaska · 1884 days ago · 21 km deep · 83 km away
  12. 3.4126 km SE of Chignik, Alaska · 1884 days ago · 43 km deep · 35 km away
  13. 3.094 km SSE of Perryville, Alaska · 1884 days ago · 9 km deep · 85 km away
  14. 3.9105 km SSE of Perryville, Alaska · 1884 days ago · 19 km deep · 86 km away · felt by 1
  15. 3.3154 km SE of Chignik, Alaska · 1884 days ago · 4 km deep · 36 km away
  16. 3.5167 km SE of Chignik, Alaska · 1884 days ago · 14 km deep · 58 km away
  17. 3.294 km SSE of Perryville, Alaska · 1884 days ago · 7 km deep · 82 km away
  18. 3.4116 km SSE of Perryville, Alaska · 1884 days ago · 16 km deep · 62 km away
  19. 3.9141 km SE of Chignik, Alaska · 1884 days ago · 25 km deep · 59 km away
  20. 4.1131 km SE of Chignik, Alaska · 1884 days ago · 34 km deep · 42 km away · felt by 1
  21. 3.2106 km SSE of Perryville, Alaska · 1884 days ago · 8 km deep · 73 km away
  22. 3.5180 km SE of Chignik, Alaska · 1884 days ago · 41 km deep · 63 km away
  23. 4.3164 km SE of Chignik, Alaska · 1884 days ago · 20 km deep · 30 km away
  24. 4.5154 km SE of Perryville, Alaska · 1884 days ago · 12 km deep · 20 km away · felt by 1
  25. 3.9160 km SE of Chignik, Alaska · 1884 days ago · 20 km deep · 64 km away
  26. 3.1165 km SE of Chignik, Alaska · 1884 days ago · 7 km deep · 26 km away
  27. 3.0119 km SSE of Perryville, Alaska · 1884 days ago · 14 km deep · 73 km away
  28. 2.8157 km SE of Perryville, Alaska · 1884 days ago · 40 km deep · 37 km away
  29. 3.8122 km SSE of Perryville, Alaska · 1884 days ago · 10 km deep · 81 km away
  30. 3.2Alaska Peninsula · 1884 days ago · 5 km deep · 27 km away
  31. 4.4134 km SSE of Chignik, Alaska · 1884 days ago · 27 km deep · 25 km away
  32. 3.6131 km SE of Perryville, Alaska · 1884 days ago · 69 km deep · 28 km away
  33. 3.7137 km SE of Chignik, Alaska · 1884 days ago · 25 km deep · 73 km away
  34. 3.9135 km SE of Perryville, Alaska · 1884 days ago · 26 km deep · 27 km away
  35. 4.1107 km SE of Perryville, Alaska · 1884 days ago · 36 km deep · 52 km away
  36. 3.9142 km SE of Perryville, Alaska · 1884 days ago · 23 km deep · 20 km away
  37. 2.7104 km SSE of Perryville, Alaska · 1884 days ago · 10 km deep · 82 km away
  38. 3.0147 km SE of Chignik, Alaska · 1884 days ago · 24 km deep · 33 km away
  39. 4.1135 km SE of Chignik, Alaska · 1884 days ago · 27 km deep · 33 km away
  40. 4.6155 km SSE of Chignik, Alaska · 1884 days ago · 19 km deep · 12 km away
  41. 3.0106 km SE of Chignik, Alaska · 1884 days ago · 6 km deep · 67 km away
  42. 3.2100 km SE of Perryville, Alaska · 1884 days ago · 10 km deep · 58 km away
  43. 3.5199 km SE of Chignik, Alaska · 1884 days ago · 10 km deep · 43 km away
  44. 3.2Alaska Peninsula · 1884 days ago · 3 km deep · 82 km away
  45. 4.2145 km SE of Chignik, Alaska · 1884 days ago · 18 km deep · 34 km away
  46. 4.2149 km SE of Chignik, Alaska · 1884 days ago · 28 km deep · 34 km away
  47. 3.4147 km SE of Perryville, Alaska · 1884 days ago · 3 km deep · 49 km away
  48. 3.3122 km SE of Chignik, Alaska · 1884 days ago · 28 km deep · 39 km away
  49. 4.3172 km ESE of Chignik, Alaska · 1884 days ago · 23 km deep · 82 km away
  50. 3.0117 km SSE of Perryville, Alaska · 1884 days ago · 24 km deep · 63 km away
  51. 3.8157 km SE of Chignik, Alaska · 1884 days ago · 6 km deep · 65 km away
  52. 3.3166 km SE of Chignik, Alaska · 1884 days ago · 23 km deep · 34 km away
  53. 2.6126 km SE of Perryville, Alaska · 1884 days ago · 27 km deep · 46 km away
  54. 3.5118 km SSE of Chignik, Alaska · 1884 days ago · 18 km deep · 42 km away
  55. 4.1149 km SSE of Chignik, Alaska · 1884 days ago · 26 km deep · 10 km away
  56. 2.7133 km SSE of Perryville, Alaska · 1884 days ago · 9 km deep · 78 km away
  57. 2.366 km SE of Perryville, Alaska · 1884 days ago · 10 km deep · 97 km away
  58. 3.8135 km SE of Perryville, Alaska · 1884 days ago · 20 km deep · 28 km away
  59. 3.8142 km SE of Perryville, Alaska · 1884 days ago · 24 km deep · 24 km away
  60. 3.4143 km SSE of Chignik, Alaska · 1884 days ago · 22 km deep · 16 km away

The first 60 of at least 202.

Before

  1. 4.3147 km SE of Chignik, Alaska · 1884 days ago · 38 km deep · 26 km away
  2. 4.1113 km ESE of Chignik, Alaska · 1884 days ago · 46 km deep · 78 km away
  3. 4.5136 km SE of Perryville, Alaska · 1884 days ago · 25 km deep · 23 km away
  4. 4.291 km SSE of Chignik, Alaska · 1884 days ago · 7 km deep · 70 km away
  5. 5.4154 km SE of Chignik, Alaska · 1884 days ago · 3 km deep · 33 km away · felt by 5
  6. 3.9118 km SE of Perryville, Alaska · 1884 days ago · 7 km deep · 40 km away
  7. 5.3128 km SE of Perryville, Alaska · 1884 days ago · 35 km deep · 31 km away
  8. 4.5106 km SSE of Chignik, Alaska · 1884 days ago · 9 km deep · 52 km away
  9. 4.2159 km SE of Chignik, Alaska · 1884 days ago · 20 km deep · 35 km away
  10. 5.9127 km SE of Chignik, Alaska · 1884 days ago · 1 km deep · 36 km away · felt by 14
  11. 5.799 km ESE of Chignik, Alaska · 1884 days ago · 35 km deep · 92 km away
  12. 5.1114 km SE of Perryville, Alaska · 1884 days ago · 35 km deep · 46 km away
  13. 5.5106 km SSE of Perryville, Alaska · 1884 days ago · 18 km deep · 70 km away · felt by 3
  14. 8.22021 Chignik, Alaska Earthquake · 1884 days ago · 35 km deep · 59 km away · felt by 512 · PAGER yellow · tsunami flag
  15. 1.876 km SSE of Perryville, Alaska · 1888 days ago · 25 km deep · 93 km away
  16. 2.0south of Alaska · 1888 days ago · 27 km deep · 77 km away
  17. 1.9118 km ESE of Chignik, Alaska · 1889 days ago · 44 km deep · 99 km away
  18. 2.487 km SE of Perryville, Alaska · 1892 days ago · 15 km deep · 73 km away
  19. 1.974 km SE of Perryville, Alaska · 1892 days ago · 25 km deep · 89 km away
  20. 2.1151 km SSE of Perryville, Alaska · 1894 days ago · 34 km deep · 81 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f2fx. Read Fri, Sep 25, 2026, 4:48 PM UTC.