Alaska earthquakes

M1.5 earthquake 208 km WSW of Adak, Alaska

A magnitude 1.5 earthquake struck 208 km WSW of Adak, Alaska on Thu, Aug 20, 2020, 7:55 PM HADT (04:55 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M4.8 193 km WSW of Adak, 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
1.5 (ml), micro
Local time
UTC
2020-08-21 04:55:12 UTC
Depth
13.2 km (8.2 mi), shallow
Epicenter
51.349° N, 179.529° 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.

Stations used
23

Nearby

Within 100 km, magnitude 1.5 and up: 178 in the 60 days after this one and 81 in the 30 days before it.

After

  1. 2.3290 km W of Adak, Alaska · 2230 days ago · 84 km deep · 98 km away
  2. 2.0178 km W of Adak, Alaska · 2230 days ago · 158 km deep · 62 km away
  3. 1.5135 km SW of Adak, Alaska · 2230 days ago · 23 km deep · 96 km away
  4. 2.7250 km W of Adak, Alaska · 2230 days ago · 186 km deep · 79 km away
  5. 1.6127 km WSW of Adak, Alaska · 2229 days ago · 25 km deep · 84 km away
  6. 1.9245 km WSW of Adak, Alaska · 2229 days ago · 26 km deep · 37 km away
  7. 1.7171 km WSW of Adak, Alaska · 2229 days ago · 14 km deep · 38 km away
  8. 2.8245 km W of Adak, Alaska · 2229 days ago · 72 km deep · 48 km away
  9. 2.1145 km WSW of Adak, Alaska · 2229 days ago · 23 km deep · 77 km away
  10. 3.2262 km W of Adak, Alaska · 2228 days ago · 206 km deep · 98 km away
  11. 1.8202 km WSW of Adak, Alaska · 2227 days ago · 16 km deep · 7 km away
  12. 1.9249 km W of Adak, Alaska · 2227 days ago · 60 km deep · 49 km away
  13. 1.6132 km WSW of Adak, Alaska · 2226 days ago · 42 km deep · 82 km away
  14. 3.8211 km WSW of Adak, Alaska · 2226 days ago · 15 km deep · 39 km away
  15. 2.7161 km WSW of Adak, Alaska · 2226 days ago · 28 km deep · 69 km away
  16. 1.7236 km WSW of Adak, Alaska · 2226 days ago · 14 km deep · 32 km away
  17. 1.8122 km WSW of Adak, Alaska · 2226 days ago · 25 km deep · 91 km away
  18. 1.5142 km WSW of Adak, Alaska · 2225 days ago · 15 km deep · 71 km away
  19. 1.7142 km W of Adak, Alaska · 2225 days ago · 126 km deep · 82 km away
  20. 2.0182 km WSW of Adak, Alaska · 2225 days ago · 23 km deep · 27 km away
  21. 1.5129 km WSW of Adak, Alaska · 2225 days ago · 13 km deep · 79 km away
  22. 2.2229 km W of Adak, Alaska · 2224 days ago · 94 km deep · 59 km away
  23. 4.6294 km WSW of Adak, Alaska · 2224 days ago · 35 km deep · 86 km away
  24. 1.8299 km WSW of Adak, Alaska · 2224 days ago · 22 km deep · 90 km away
  25. 1.8295 km WSW of Adak, Alaska · 2223 days ago · 7 km deep · 86 km away
  26. 1.7157 km WSW of Adak, Alaska · 2222 days ago · 22 km deep · 71 km away
  27. 2.0222 km W of Adak, Alaska · 2222 days ago · 77 km deep · 41 km away
  28. 1.6127 km W of Adak, Alaska · 2222 days ago · 12 km deep · 91 km away
  29. 1.6242 km WSW of Adak, Alaska · 2222 days ago · 48 km deep · 37 km away
  30. 1.6130 km WSW of Adak, Alaska · 2221 days ago · 17 km deep · 84 km away
  31. 4.3126 km WSW of Adak, Alaska · 2221 days ago · 34 km deep · 82 km away
  32. 1.7130 km WSW of Adak, Alaska · 2221 days ago · 24 km deep · 83 km away
  33. 1.7129 km WSW of Adak, Alaska · 2221 days ago · 25 km deep · 85 km away
  34. 1.8128 km WSW of Adak, Alaska · 2221 days ago · 25 km deep · 84 km away
  35. 1.8127 km WSW of Adak, Alaska · 2221 days ago · 25 km deep · 84 km away
  36. 1.7128 km WSW of Adak, Alaska · 2221 days ago · 24 km deep · 89 km away
  37. 1.8129 km WSW of Adak, Alaska · 2221 days ago · 23 km deep · 82 km away
  38. 1.9135 km WSW of Adak, Alaska · 2220 days ago · 26 km deep · 77 km away
  39. 3.2149 km SW of Adak, Alaska · 2220 days ago · 30 km deep · 84 km away
  40. 1.8130 km WSW of Adak, Alaska · 2219 days ago · 25 km deep · 83 km away
  41. 2.4238 km WSW of Adak, Alaska · 2219 days ago · 11 km deep · 36 km away
  42. 4.0235 km WSW of Adak, Alaska · 2218 days ago · 19 km deep · 26 km away
  43. 3.2232 km WSW of Adak, Alaska · 2218 days ago · 15 km deep · 24 km away
  44. 1.6143 km W of Adak, Alaska · 2218 days ago · 10 km deep · 68 km away
  45. 3.8149 km WSW of Adak, Alaska · 2217 days ago · 35 km deep · 75 km away
  46. 1.8192 km WSW of Adak, Alaska · 2217 days ago · 22 km deep · 23 km away
  47. 4.4138 km WSW of Adak, Alaska · 2217 days ago · 35 km deep · 81 km away · felt by 1
  48. 1.8132 km WSW of Adak, Alaska · 2217 days ago · 21 km deep · 88 km away
  49. 2.0176 km WSW of Adak, Alaska · 2216 days ago · 29 km deep · 35 km away
  50. 4.6125 km W of Adak, Alaska · 2215 days ago · 18 km deep · 89 km away · felt by 1
  51. 2.0127 km W of Adak, Alaska · 2215 days ago · 11 km deep · 89 km away
  52. 2.2262 km W of Adak, Alaska · 2215 days ago · 82 km deep · 77 km away
  53. 1.8145 km WSW of Adak, Alaska · 2215 days ago · 7 km deep · 64 km away
  54. 2.4237 km WSW of Adak, Alaska · 2214 days ago · 13 km deep · 45 km away
  55. 4.5170 km WSW of Adak, Alaska · 2214 days ago · 50 km deep · 41 km away
  56. 1.8172 km WSW of Adak, Alaska · 2214 days ago · 22 km deep · 51 km away
  57. 4.3238 km WSW of Adak, Alaska · 2214 days ago · 47 km deep · 39 km away
  58. 2.5238 km WSW of Adak, Alaska · 2214 days ago · 12 km deep · 49 km away
  59. 4.1235 km WSW of Adak, Alaska · 2214 days ago · 40 km deep · 41 km away
  60. 2.2238 km WSW of Adak, Alaska · 2214 days ago · 15 km deep · 32 km away

The first 60 of 178.

Before

  1. 1.6180 km W of Adak, Alaska · 2231 days ago · 137 km deep · 49 km away
  2. 1.6231 km WSW of Adak, Alaska · 2232 days ago · 43 km deep · 24 km away
  3. 1.6201 km WSW of Adak, Alaska · 2232 days ago · 26 km deep · 41 km away
  4. 1.5283 km W of Adak, Alaska · 2232 days ago · 63 km deep · 82 km away
  5. 2.7163 km SW of Adak, Alaska · 2232 days ago · 10 km deep · 82 km away
  6. 2.8226 km WSW of Adak, Alaska · 2232 days ago · 67 km deep · 29 km away
  7. 1.5149 km WSW of Adak, Alaska · 2233 days ago · 70 km deep · 60 km away
  8. 1.5245 km WSW of Adak, Alaska · 2233 days ago · 8 km deep · 40 km away
  9. 1.6114 km WSW of Adak, Alaska · 2233 days ago · 24 km deep · 95 km away
  10. 1.9130 km WSW of Adak, Alaska · 2233 days ago · 10 km deep · 79 km away
  11. 1.7187 km WSW of Adak, Alaska · 2233 days ago · 19 km deep · 23 km away
  12. 1.6127 km WSW of Adak, Alaska · 2233 days ago · 6 km deep · 81 km away
  13. 2.1145 km WSW of Adak, Alaska · 2234 days ago · 64 km deep · 63 km away
  14. 1.7216 km WSW of Adak, Alaska · 2234 days ago · 5 km deep · 22 km away
  15. 2.6278 km W of Adak, Alaska · 2234 days ago · 73 km deep · 80 km away
  16. 3.8133 km W of Adak, Alaska · 2234 days ago · 145 km deep · 94 km away
  17. 1.9221 km W of Adak, Alaska · 2235 days ago · 72 km deep · 35 km away
  18. 3.3128 km WSW of Adak, Alaska · 2235 days ago · 10 km deep · 80 km away
  19. 2.9158 km WSW of Adak, Alaska · 2235 days ago · 29 km deep · 74 km away
  20. 1.7204 km WSW of Adak, Alaska · 2236 days ago · 28 km deep · 5 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak020ar2gra8. Read Tue, Sep 29, 2026, 1:17 PM UTC.