Alaska earthquakes

M2.5 earthquake 58 km S of Unalaska, Alaska

A magnitude 2.5 earthquake struck 58 km S of Unalaska, Alaska on Mon, Sep 21, 2020, 3:33 AM AKDT (11:33 UTC), 72 km (45 mi) below the surface.

A larger quake followed: M4.3 117 km ESE of Nikolski, 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
2.5 (ml), micro
Local time
UTC
2020-09-21 11:33:26 UTC
Depth
71.8 km (44.6 mi), intermediate-depth
Epicenter
53.353° N, 166.655° 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 8.6 km horizontally, 15.0 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
219°, poorly surrounded by stations
Stations used
19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 70 in the 60 days after this one and 36 in the 30 days before it.

After

  1. 3.2100 km E of Nikolski, Alaska · 2197 days ago · 35 km deep · 79 km away
  2. 3.394 km E of Nikolski, Alaska · 2196 days ago · 35 km deep · 80 km away
  3. 2.283 km WSW of Unalaska, Alaska · 2195 days ago · 118 km deep · 73 km away
  4. 2.883 km E of Nikolski, Alaska · 2194 days ago · 58 km deep · 72 km away
  5. 1.871 km SE of Unalaska, Alaska · 2194 days ago · 24 km deep · 65 km away
  6. 1.538 km SE of Unalaska, Alaska · 2189 days ago · 32 km deep · 41 km away
  7. 3.2Fox Islands, Aleutian Islands, Alaska · 2185 days ago · 35 km deep · 66 km away
  8. 1.887 km SSW of Unalaska, Alaska · 2184 days ago · 17 km deep · 34 km away
  9. 1.896 km SSW of Unalaska, Alaska · 2184 days ago · 39 km deep · 49 km away
  10. 1.949 km SSE of Akutan, Alaska · 2183 days ago · 58 km deep · 80 km away
  11. 1.644 km S of Akutan, Alaska · 2181 days ago · 24 km deep · 70 km away
  12. 1.761 km S of Unalaska, Alaska · 2177 days ago · 43 km deep · 10 km away
  13. 2.278 km SSE of Akutan, Alaska · 2177 days ago · 25 km deep · 89 km away
  14. 1.871 km S of Unalaska, Alaska · 2176 days ago · 28 km deep · 20 km away
  15. 1.540 km S of Unalaska, Alaska · 2176 days ago · 61 km deep · 18 km away
  16. 2.765 km SW of Unalaska, Alaska · 2175 days ago · 10 km deep · 36 km away
  17. 1.945 km SW of Unalaska, Alaska · 2175 days ago · 27 km deep · 27 km away
  18. 1.768 km SE of Unalaska, Alaska · 2174 days ago · 38 km deep · 51 km away
  19. 1.974 km SW of Unalaska, Alaska · 2174 days ago · 71 km deep · 55 km away
  20. 1.667 km SE of Unalaska, Alaska · 2174 days ago · 49 km deep · 49 km away
  21. 3.529 km WSW of Dutch Harbor, Alaska · 2173 days ago · 107 km deep · 56 km away
  22. 2.070 km SSW of Unalaska, Alaska · 2171 days ago · 67 km deep · 31 km away
  23. 1.747 km SSE of Unalaska, Alaska · 2171 days ago · 52 km deep · 38 km away
  24. 2.1144 km ESE of Nikolski, Alaska · 2170 days ago · 26 km deep · 99 km away
  25. 1.779 km S of Unalaska, Alaska · 2170 days ago · 25 km deep · 21 km away
  26. 3.2129 km S of Unalaska, Alaska · 2170 days ago · 30 km deep · 71 km away
  27. 3.054 km SE of Unalaska, Alaska · 2169 days ago · 56 km deep · 60 km away
  28. 2.175 km E of Nikolski, Alaska · 2167 days ago · 37 km deep · 81 km away
  29. 2.622 km SSW of Akutan, Alaska · 2166 days ago · 92 km deep · 81 km away
  30. 2.555 km SE of Unalaska, Alaska · 2164 days ago · 59 km deep · 42 km away
  31. 1.568 km SSE of Akutan, Alaska · 2163 days ago · 19 km deep · 83 km away
  32. 1.971 km E of Nikolski, Alaska · 2162 days ago · 33 km deep · 94 km away
  33. 1.680 km SSE of Akutan, Alaska · 2160 days ago · 43 km deep · 100 km away
  34. 1.968 km WSW of Unalaska, Alaska · 2160 days ago · 86 km deep · 61 km away
  35. 1.773 km S of Akutan, Alaska · 2159 days ago · 43 km deep · 71 km away
  36. 3.268 km SW of Unalaska, Alaska · 2155 days ago · 76 km deep · 39 km away
  37. 1.867 km SE of Unalaska, Alaska · 2154 days ago · 29 km deep · 52 km away
  38. 2.272 km SE of Unalaska, Alaska · 2153 days ago · 34 km deep · 67 km away
  39. 2.864 km SSE of Akutan, Alaska · 2153 days ago · 47 km deep · 91 km away
  40. 2.723 km S of Akutan, Alaska · 2152 days ago · 69 km deep · 88 km away
  41. 2.382 km S of Unalaska, Alaska · 2152 days ago · 25 km deep · 24 km away
  42. 2.188 km SSE of Akutan, Alaska · 2151 days ago · 26 km deep · 92 km away
  43. 2.175 km SSE of Unalaska, Alaska · 2151 days ago · 21 km deep · 50 km away
  44. 2.976 km SSE of Akutan, Alaska · 2151 days ago · 31 km deep · 80 km away
  45. 1.531 km SE of Unalaska, Alaska · 2151 days ago · 70 km deep · 49 km away
  46. 2.972 km SSE of Akutan, Alaska · 2150 days ago · 35 km deep · 80 km away
  47. 2.9136 km ESE of Nikolski, Alaska · 2149 days ago · 10 km deep · 93 km away
  48. 3.783 km SSW of Unalaska, Alaska · 2149 days ago · 35 km deep · 25 km away
  49. 1.881 km S of Unalaska, Alaska · 2149 days ago · 26 km deep · 23 km away
  50. 1.831 km SW of Akutan, Alaska · 2148 days ago · 74 km deep · 73 km away
  51. 1.646 km ESE of Unalaska, Alaska · 2148 days ago · 24 km deep · 64 km away
  52. 2.924 km E of Unalaska, Alaska · 2147 days ago · 77 km deep · 68 km away
  53. 1.849 km S of Akutan, Alaska · 2146 days ago · 29 km deep · 66 km away
  54. 1.827 km SSW of Unalaska, Alaska · 2145 days ago · 75 km deep · 31 km away
  55. 2.1106 km SE of Unalaska, Alaska · 2145 days ago · 9 km deep · 83 km away
  56. 3.279 km SSW of Unalaska, Alaska · 2144 days ago · 35 km deep · 22 km away
  57. 1.880 km S of Unalaska, Alaska · 2144 days ago · 26 km deep · 22 km away
  58. 2.290 km S of Unalaska, Alaska · 2143 days ago · 26 km deep · 32 km away
  59. 1.944 km SW of Unalaska, Alaska · 2142 days ago · 15 km deep · 38 km away
  60. 2.940 km SSE of Akutan, Alaska · 2142 days ago · 73 km deep · 91 km away

The first 60 of 70.

Before

  1. 1.991 km E of Nikolski, Alaska · 2197 days ago · 26 km deep · 80 km away
  2. 1.568 km SW of Unalaska, Alaska · 2198 days ago · 13 km deep · 46 km away
  3. 1.891 km E of Nikolski, Alaska · 2198 days ago · 48 km deep · 69 km away
  4. 1.680 km SSE of Akutan, Alaska · 2199 days ago · 38 km deep · 88 km away
  5. 1.820 km NE of Dutch Harbor, Alaska · 2199 days ago · 99 km deep · 77 km away
  6. 1.816 km SSW of Akutan, Alaska · 2202 days ago · 77 km deep · 89 km away
  7. 3.377 km SSE of Unalaska, Alaska · 2202 days ago · 58 km deep · 41 km away
  8. 2.927 km ENE of Dutch Harbor, Alaska · 2203 days ago · 105 km deep · 78 km away
  9. 1.986 km SE of Unalaska, Alaska · 2204 days ago · 49 km deep · 66 km away
  10. 3.241 km ESE of Unalaska, Alaska · 2204 days ago · 36 km deep · 64 km away
  11. 1.615 km WSW of Dutch Harbor, Alaska · 2204 days ago · 7 km deep · 57 km away
  12. 2.378 km NE of Nikolski, Alaska · 2204 days ago · 144 km deep · 99 km away
  13. 1.915 km WSW of Dutch Harbor, Alaska · 2205 days ago · 3 km deep · 55 km away
  14. 2.929 km SW of Unalaska, Alaska · 2206 days ago · 77 km deep · 36 km away
  15. 3.281 km SSW of Unalaska, Alaska · 2207 days ago · 35 km deep · 23 km away
  16. 2.183 km S of Unalaska, Alaska · 2207 days ago · 26 km deep · 25 km away
  17. 1.8Fox Islands, Aleutian Islands, Alaska · 2208 days ago · 1 km deep · 67 km away
  18. 1.593 km ESE of Nikolski, Alaska · 2209 days ago · 26 km deep · 95 km away
  19. 1.881 km WSW of Unalaska, Alaska · 2209 days ago · 81 km deep · 62 km away
  20. 1.614 km SSW of Unalaska, Alaska · 2210 days ago · 82 km deep · 46 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000bzhv (also filed as ak020c6g5vvi). Read Sun, Sep 27, 2026, 12:43 PM UTC.