Alaska earthquakes

M3.5 earthquake 20 km ENE of Atka, Alaska

A magnitude 3.5 earthquake struck 20 km ENE of Atka, Alaska on Wed, Nov 11, 2020, 5:39 PM HAST (03:39 UTC), 159 km (99 mi) below the surface.

A larger quake followed: M4.6 47 km WSW 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
3.5 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2020-11-12 03:39:48 UTC
Depth
158.9 km (98.8 mi), intermediate-depth
Epicenter
52.265° N, 173.928° 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
3.5ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.115 · 10 stations
2.9ML, 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 32.6 km horizontally, 9.9 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
292°, poorly surrounded by stations
Stations used
35

Nearby

Within 100 km, magnitude 1.5 and up: 57 in the 60 days after this one and 24 in the 30 days before it.

After

  1. 2.230 km SSW of Atka, Alaska · 2152 days ago · 61 km deep · 46 km away
  2. 3.090 km SSE of Atka, Alaska · 2151 days ago · 10 km deep · 89 km away
  3. 3.272 km ESE of Atka, Alaska · 2150 days ago · 100 km deep · 58 km away
  4. 3.2112 km ESE of Atka, Alaska · 2150 days ago · 35 km deep · 98 km away
  5. 1.988 km S of Atka, Alaska · 2149 days ago · 13 km deep · 98 km away
  6. 3.669 km SSW of Atka, Alaska · 2149 days ago · 25 km deep · 85 km away
  7. 2.883 km SSW of Atka, Alaska · 2147 days ago · 28 km deep · 97 km away
  8. 1.974 km SW of Atka, Alaska · 2144 days ago · 22 km deep · 93 km away
  9. 2.9106 km ESE of Atka, Alaska · 2144 days ago · 19 km deep · 94 km away
  10. 3.6103 km SE of Atka, Alaska · 2143 days ago · 35 km deep · 94 km away
  11. 1.667 km WSW of Atka, Alaska · 2142 days ago · 69 km deep · 88 km away
  12. 2.056 km SSW of Atka, Alaska · 2141 days ago · 23 km deep · 73 km away
  13. 3.293 km SSE of Atka, Alaska · 2139 days ago · 35 km deep · 95 km away
  14. 2.8101 km SSE of Atka, Alaska · 2139 days ago · 35 km deep · 99 km away
  15. 2.563 km WSW of Atka, Alaska · 2139 days ago · 57 km deep · 84 km away
  16. 3.056 km SSW of Atka, Alaska · 2133 days ago · 33 km deep · 74 km away
  17. 3.373 km SE of Atka, Alaska · 2133 days ago · 14 km deep · 71 km away
  18. 2.974 km SW of Atka, Alaska · 2130 days ago · 63 km deep · 94 km away
  19. 2.631 km N of Atka, Alaska · 2130 days ago · 170 km deep · 27 km away
  20. 2.862 km S of Atka, Alaska · 2130 days ago · 35 km deep · 73 km away
  21. 3.0Andreanof Islands, Aleutian Islands, Alaska · 2127 days ago · 12 km deep · 86 km away
  22. 2.7100 km SE of Atka, Alaska · 2127 days ago · 12 km deep · 95 km away
  23. 2.786 km E of Atka, Alaska · 2123 days ago · 112 km deep · 70 km away
  24. 4.562 km N of Atka, Alaska · 2121 days ago · 182 km deep · 56 km away
  25. 1.944 km SSE of Atka, Alaska · 2120 days ago · 25 km deep · 50 km away
  26. 3.048 km SSW of Atka, Alaska · 2120 days ago · 49 km deep · 62 km away
  27. 1.643 km SSE of Atka, Alaska · 2120 days ago · 25 km deep · 50 km away
  28. 1.931 km SSE of Atka, Alaska · 2119 days ago · 17 km deep · 35 km away
  29. 2.735 km S of Atka, Alaska · 2118 days ago · 192 km deep · 48 km away
  30. 4.647 km WSW of Atka, Alaska · 2117 days ago · 81 km deep · 67 km away · felt by 1
  31. 2.874 km SSW of Atka, Alaska · 2117 days ago · 35 km deep · 90 km away
  32. 2.722 km WSW of Atka, Alaska · 2116 days ago · 214 km deep · 43 km away
  33. 2.866 km SSW of Atka, Alaska · 2116 days ago · 24 km deep · 84 km away
  34. 1.925 km SSE of Atka, Alaska · 2115 days ago · 71 km deep · 35 km away
  35. 3.137 km ESE of Atka, Alaska · 2115 days ago · 128 km deep · 27 km away
  36. 2.056 km S of Atka, Alaska · 2115 days ago · 24 km deep · 64 km away
  37. 3.1Andreanof Islands, Aleutian Islands, Alaska · 2115 days ago · 128 km deep · 59 km away
  38. 3.666 km E of Atka, Alaska · 2111 days ago · 102 km deep · 48 km away
  39. 2.181 km SW of Atka, Alaska · 2107 days ago · 26 km deep · 99 km away
  40. 2.9Andreanof Islands, Aleutian Islands, Alaska · 2106 days ago · 175 km deep · 19 km away
  41. 1.618 km ENE of Atka, Alaska · 2105 days ago · 10 km deep · 4 km away
  42. 3.335 km SW of Atka, Alaska · 2105 days ago · 91 km deep · 55 km away
  43. 2.956 km NE of Atka, Alaska · 2104 days ago · 201 km deep · 37 km away
  44. 2.173 km WSW of Atka, Alaska · 2104 days ago · 88 km deep · 94 km away
  45. 3.4101 km ENE of Atka, Alaska · 2104 days ago · 186 km deep · 81 km away
  46. 3.066 km S of Atka, Alaska · 2104 days ago · 20 km deep · 79 km away
  47. 1.979 km SSW of Atka, Alaska · 2104 days ago · 26 km deep · 92 km away
  48. 2.539 km E of Atka, Alaska · 2099 days ago · 113 km deep · 22 km away
  49. 2.636 km SSW of Atka, Alaska · 2099 days ago · 215 km deep · 51 km away
  50. 3.040 km NNW of Atka, Alaska · 2099 days ago · 198 km deep · 48 km away
  51. 1.746 km SW of Atka, Alaska · 2098 days ago · 60 km deep · 65 km away
  52. 1.8Andreanof Islands, Aleutian Islands, Alaska · 2098 days ago · 16 km deep · 85 km away
  53. 1.717 km SW of Atka, Alaska · 2097 days ago · 10 km deep · 37 km away
  54. 1.814 km WSW of Atka, Alaska · 2097 days ago · 18 km deep · 35 km away
  55. 2.684 km SSE of Atka, Alaska · 2097 days ago · 147 km deep · 87 km away
  56. 2.040 km S of Atka, Alaska · 2097 days ago · 44 km deep · 51 km away
  57. 2.765 km ENE of Atka, Alaska · 2094 days ago · 139 km deep · 46 km away

Before

  1. 2.943 km WSW of Atka, Alaska · 2152 days ago · 247 km deep · 64 km away
  2. 2.933 km NNE of Atka, Alaska · 2152 days ago · 218 km deep · 26 km away
  3. 2.49 km ESE of Atka, Alaska · 2156 days ago · 158 km deep · 15 km away
  4. 2.352 km SE of Atka, Alaska · 2159 days ago · 115 km deep · 49 km away
  5. 1.660.7 km NE of Atka, AK · 2160 days ago · 47 km deep · 80 km away
  6. 2.043 km W of Atka, Alaska · 2161 days ago · 95 km deep · 63 km away
  7. 2.013 km SE of Atka, Alaska · 2163 days ago · 98 km deep · 18 km away
  8. 2.516 km NNE of Atka, Alaska · 2165 days ago · 4 km deep · 17 km away
  9. 2.755 km NNW of Atka, Alaska · 2166 days ago · 183 km deep · 57 km away
  10. 1.640 km ESE of Atka, Alaska · 2166 days ago · 78 km deep · 26 km away
  11. 1.534 km SE of Atka, Alaska · 2167 days ago · 12 km deep · 35 km away
  12. 3.057 km ESE of Atka, Alaska · 2168 days ago · 76 km deep · 44 km away
  13. 2.373 km W of Atka, Alaska · 2168 days ago · 239 km deep · 93 km away
  14. 1.930 km W of Atka, Alaska · 2168 days ago · 199 km deep · 49 km away
  15. 1.819 km NW of Atka, Alaska · 2169 days ago · 188 km deep · 33 km away
  16. 1.723 km WNW of Atka, Alaska · 2169 days ago · 148 km deep · 38 km away
  17. 2.934 km N of Atka, Alaska · 2171 days ago · 193 km deep · 34 km away
  18. 2.841 km ENE of Atka, Alaska · 2171 days ago · 166 km deep · 21 km away
  19. 3.071 km ESE of Atka, Alaska · 2174 days ago · 15 km deep · 60 km away
  20. 1.615 km NW of Atka, Alaska · 2174 days ago · 180 km deep · 29 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000clg1 (also filed as ak020ekbdw1k). Read Sun, Oct 4, 2026, 8:34 AM UTC.