Alaska earthquakes

M1.8 earthquake 179 km WSW of Adak, Alaska

A magnitude 1.8 earthquake struck 179 km WSW of Adak, Alaska on Fri, Feb 19, 2021, 6:42 PM HAST (04:42 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M5.4 185 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
1.8 (ml), micro
Local time
UTC
2021-02-20 04:42:35 UTC
Depth
12.8 km (8.0 mi), shallow
Epicenter
51.276° N, 179.034° 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: 95 in the 60 days after this one and 62 in the 30 days before it.

After

  1. 2.9213 km WSW of Adak, Alaska · 2043 days ago · 13 km deep · 40 km away
  2. 2.4109 km W of Adak, Alaska · 2043 days ago · 188 km deep · 75 km away
  3. 1.9117 km WSW of Adak, Alaska · 2042 days ago · 27 km deep · 61 km away
  4. 2.1111 km W of Adak, Alaska · 2042 days ago · 80 km deep · 76 km away
  5. 1.7126 km WSW of Adak, Alaska · 2042 days ago · 13 km deep · 58 km away
  6. 2.781 km WSW of Adak, Alaska · 2042 days ago · 79 km deep · 98 km away
  7. 4.8220 km WSW of Adak, Alaska · 2042 days ago · 10 km deep · 54 km away
  8. 3.7225 km WSW of Adak, Alaska · 2042 days ago · 10 km deep · 56 km away
  9. 2.899 km WSW of Adak, Alaska · 2042 days ago · 34 km deep · 81 km away
  10. 2.8234 km WSW of Adak, Alaska · 2041 days ago · 24 km deep · 58 km away
  11. 3.9222 km WSW of Adak, Alaska · 2041 days ago · 22 km deep · 48 km away
  12. 1.9134 km SW of Adak, Alaska · 2041 days ago · 41 km deep · 61 km away
  13. 1.8139 km WSW of Adak, Alaska · 2040 days ago · 25 km deep · 43 km away
  14. 2.893 km WSW of Adak, Alaska · 2040 days ago · 35 km deep · 89 km away
  15. 2.2169 km WSW of Adak, Alaska · 2040 days ago · 20 km deep · 27 km away
  16. 1.9170 km W of Adak, Alaska · 2040 days ago · 5 km deep · 55 km away
  17. 2.0143 km WSW of Adak, Alaska · 2038 days ago · 25 km deep · 37 km away
  18. 3.7255 km W of Adak, Alaska · 2037 days ago · 83 km deep · 96 km away
  19. 1.8128 km WSW of Adak, Alaska · 2036 days ago · 13 km deep · 56 km away
  20. 2.4220 km W of Adak, Alaska · 2036 days ago · 67 km deep · 95 km away
  21. 2.0116 km WSW of Adak, Alaska · 2035 days ago · 85 km deep · 67 km away
  22. 2.2191 km WSW of Adak, Alaska · 2035 days ago · 67 km deep · 20 km away
  23. 5.4185 km WSW of Adak, Alaska · 2035 days ago · 22 km deep · 24 km away · felt by 2 · tsunami flag
  24. 4.4217 km WSW of Adak, Alaska · 2033 days ago · 15 km deep · 49 km away
  25. 4.7211 km WSW of Adak, Alaska · 2033 days ago · 10 km deep · 43 km away
  26. 3.4213 km WSW of Adak, Alaska · 2031 days ago · 10 km deep · 35 km away
  27. 2.8113 km WSW of Adak, Alaska · 2028 days ago · 17 km deep · 67 km away
  28. 2.0119 km W of Adak, Alaska · 2027 days ago · 9 km deep · 80 km away
  29. 3.1123 km WSW of Adak, Alaska · 2027 days ago · 30 km deep · 63 km away
  30. 1.6117 km W of Adak, Alaska · 2027 days ago · 15 km deep · 79 km away
  31. 1.8122 km WSW of Adak, Alaska · 2026 days ago · 13 km deep · 59 km away
  32. 1.9148 km SW of Adak, Alaska · 2026 days ago · 21 km deep · 45 km away
  33. 1.9130 km WSW of Adak, Alaska · 2026 days ago · 45 km deep · 52 km away
  34. 1.8152 km WSW of Adak, Alaska · 2025 days ago · 20 km deep · 40 km away
  35. 1.5127 km WSW of Adak, Alaska · 2025 days ago · 18 km deep · 53 km away
  36. 1.6103 km WSW of Adak, Alaska · 2025 days ago · 5 km deep · 76 km away
  37. 1.8133 km WSW of Adak, Alaska · 2025 days ago · 36 km deep · 47 km away
  38. 1.7176 km W of Adak, Alaska · 2025 days ago · 14 km deep · 55 km away
  39. 2.1179 km WSW of Adak, Alaska · 2025 days ago · 20 km deep · 2 km away
  40. 3.3190 km WSW of Adak, Alaska · 2025 days ago · 68 km deep · 33 km away
  41. 4.3225 km W of Adak, Alaska · 2024 days ago · 158 km deep · 98 km away
  42. 1.5133 km W of Adak, Alaska · 2024 days ago · 7 km deep · 56 km away
  43. 2.893 km SW of Adak, Alaska · 2023 days ago · 39 km deep · 96 km away
  44. 1.7111 km WSW of Adak, Alaska · 2023 days ago · 13 km deep · 67 km away
  45. 3.3Andreanof Islands, Aleutian Islands, Alaska · 2021 days ago · 35 km deep · 36 km away
  46. 3.0148 km SW of Adak, Alaska · 2020 days ago · 10 km deep · 55 km away
  47. 2.1140 km WSW of Adak, Alaska · 2019 days ago · 21 km deep · 46 km away
  48. 1.9133 km WSW of Adak, Alaska · 2019 days ago · 4 km deep · 50 km away
  49. 1.9130 km WSW of Adak, Alaska · 2019 days ago · 58 km deep · 54 km away
  50. 2.2188 km WSW of Adak, Alaska · 2018 days ago · 6 km deep · 10 km away
  51. 1.992 km WSW of Adak, Alaska · 2018 days ago · 71 km deep · 87 km away
  52. 3.0131 km WSW of Adak, Alaska · 2016 days ago · 29 km deep · 51 km away
  53. 3.1224 km W of Adak, Alaska · 2014 days ago · 128 km deep · 80 km away
  54. 1.7115 km WSW of Adak, Alaska · 2014 days ago · 8 km deep · 64 km away
  55. 1.6108 km WSW of Adak, Alaska · 2014 days ago · 4 km deep · 70 km away
  56. 2.2151 km WSW of Adak, Alaska · 2013 days ago · 17 km deep · 31 km away
  57. 1.999 km WSW of Adak, Alaska · 2013 days ago · 59 km deep · 79 km away
  58. 1.9148 km WSW of Adak, Alaska · 2012 days ago · 30 km deep · 37 km away
  59. 3.5237 km W of Adak, Alaska · 2011 days ago · 90 km deep · 80 km away
  60. 1.9107 km WSW of Adak, Alaska · 2011 days ago · 7 km deep · 72 km away

The first 60 of 95.

Before

  1. 4.1211 km WSW of Adak, Alaska · 2043 days ago · 35 km deep · 37 km away
  2. 4.0218 km WSW of Adak, Alaska · 2043 days ago · 10 km deep · 49 km away
  3. 3.1234 km WSW of Adak, Alaska · 2043 days ago · 10 km deep · 58 km away
  4. 2.1204 km WSW of Adak, Alaska · 2044 days ago · 8 km deep · 34 km away
  5. 3.9180 km WSW of Adak, Alaska · 2044 days ago · 37 km deep · 14 km away
  6. 3.0208 km WSW of Adak, Alaska · 2044 days ago · 16 km deep · 34 km away
  7. 3.8228 km WSW of Adak, Alaska · 2044 days ago · 10 km deep · 58 km away
  8. 3.6136 km WSW of Adak, Alaska · 2044 days ago · 19 km deep · 45 km away
  9. 3.8237 km WSW of Adak, Alaska · 2044 days ago · 23 km deep · 62 km away
  10. 4.1236 km WSW of Adak, Alaska · 2044 days ago · 10 km deep · 61 km away
  11. 3.5218 km WSW of Adak, Alaska · 2044 days ago · 10 km deep · 46 km away
  12. 3.5213 km WSW of Adak, Alaska · 2044 days ago · 10 km deep · 50 km away
  13. 2.2206 km WSW of Adak, Alaska · 2044 days ago · 7 km deep · 39 km away
  14. 3.0217 km SW of Adak, Alaska · 2044 days ago · 10 km deep · 54 km away
  15. 3.4216 km WSW of Adak, Alaska · 2044 days ago · 10 km deep · 51 km away
  16. 4.6199 km WSW of Adak, Alaska · 2044 days ago · 35 km deep · 24 km away · felt by 1
  17. 5.6209 km WSW of Adak, Alaska · 2044 days ago · 19 km deep · 40 km away · tsunami flag
  18. 4.2227 km SW of Adak, Alaska · 2044 days ago · 10 km deep · 62 km away
  19. 2.8224 km WSW of Adak, Alaska · 2044 days ago · 26 km deep · 51 km away
  20. 3.8212 km WSW of Adak, Alaska · 2044 days ago · 31 km deep · 37 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0212cf1if1. Read Fri, Sep 25, 2026, 2:06 PM UTC.