Alaska earthquakes

M1.5 earthquake 171 km W of Adak, Alaska

A magnitude 1.5 earthquake struck 171 km W of Adak, Alaska on Fri, Aug 27, 2021, 1:13 PM HADT (22:13 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.6 87 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
2021-08-27 22:13:44 UTC
Depth
4.8 km (3.0 mi), shallow
Epicenter
51.735° N, 179.103° 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
34

Nearby

Within 100 km, magnitude 1.5 and up: 140 in the 60 days after this one and 59 in the 30 days before it.

After

  1. 1.5254 km WSW of Adak, Alaska · 1853 days ago · 16 km deep · 87 km away
  2. 2.687 km WSW of Adak, Alaska · 1853 days ago · 33 km deep · 98 km away
  3. 1.9141 km WSW of Adak, Alaska · 1852 days ago · 9 km deep · 50 km away
  4. 1.597 km WSW of Adak, Alaska · 1852 days ago · 73 km deep · 80 km away
  5. 1.8211 km W of Adak, Alaska · 1852 days ago · 92 km deep · 40 km away
  6. 1.9230 km W of Adak, Alaska · 1852 days ago · 93 km deep · 60 km away
  7. 1.8145 km WSW of Adak, Alaska · 1852 days ago · 23 km deep · 75 km away
  8. 2.5141 km WSW of Adak, Alaska · 1851 days ago · 30 km deep · 58 km away
  9. 1.9111 km WSW of Adak, Alaska · 1851 days ago · 13 km deep · 71 km away
  10. 1.9192 km W of Adak, Alaska · 1851 days ago · 148 km deep · 52 km away
  11. 1.9243 km W of Adak, Alaska · 1850 days ago · 70 km deep · 72 km away
  12. 1.7215 km WSW of Adak, Alaska · 1850 days ago · 14 km deep · 81 km away
  13. 1.9257 km WSW of Adak, Alaska · 1848 days ago · 57 km deep · 88 km away
  14. 1.6248 km WSW of Adak, Alaska · 1848 days ago · 48 km deep · 82 km away
  15. 1.6194 km WSW of Adak, Alaska · 1848 days ago · 5 km deep · 74 km away
  16. 2.6221 km WSW of Adak, Alaska · 1848 days ago · 88 km deep · 60 km away
  17. 1.6232 km WSW of Adak, Alaska · 1847 days ago · 11 km deep · 64 km away
  18. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1847 days ago · 42 km deep · 41 km away
  19. 1.9232 km WSW of Adak, Alaska · 1847 days ago · 7 km deep · 64 km away
  20. 1.6234 km WSW of Adak, Alaska · 1847 days ago · 13 km deep · 65 km away
  21. 1.5124 km WSW of Adak, Alaska · 1847 days ago · 7 km deep · 53 km away
  22. 1.8231 km WSW of Adak, Alaska · 1847 days ago · 13 km deep · 63 km away
  23. 3.0123 km WSW of Adak, Alaska · 1845 days ago · 33 km deep · 67 km away
  24. 1.8124 km WSW of Adak, Alaska · 1845 days ago · 70 km deep · 52 km away
  25. 1.9134 km W of Adak, Alaska · 1845 days ago · 113 km deep · 41 km away
  26. 1.7189 km WSW of Adak, Alaska · 1845 days ago · 3 km deep · 73 km away
  27. 1.6124 km W of Adak, Alaska · 1845 days ago · 11 km deep · 47 km away
  28. 1.6240 km WSW of Adak, Alaska · 1844 days ago · 13 km deep · 86 km away
  29. 1.6245 km WSW of Adak, Alaska · 1844 days ago · 13 km deep · 88 km away
  30. 2.8199 km WSW of Adak, Alaska · 1844 days ago · 16 km deep · 83 km away
  31. 2.6245 km W of Adak, Alaska · 1843 days ago · 174 km deep · 79 km away
  32. 1.5225 km W of Adak, Alaska · 1843 days ago · 73 km deep · 55 km away
  33. 1.6124 km SW of Adak, Alaska · 1843 days ago · 26 km deep · 98 km away
  34. 2.9177 km WSW of Adak, Alaska · 1842 days ago · 30 km deep · 68 km away
  35. 1.5185 km W of Adak, Alaska · 1842 days ago · 15 km deep · 19 km away
  36. 1.8114 km WSW of Adak, Alaska · 1842 days ago · 15 km deep · 69 km away
  37. 1.6168 km WSW of Adak, Alaska · 1842 days ago · 26 km deep · 70 km away
  38. 1.5155 km W of Adak, Alaska · 1842 days ago · 2 km deep · 16 km away
  39. 2.2228 km W of Adak, Alaska · 1841 days ago · 149 km deep · 64 km away
  40. 2.9126 km SW of Adak, Alaska · 1840 days ago · 35 km deep · 98 km away
  41. 3.9250 km W of Adak, Alaska · 1840 days ago · 131 km deep · 82 km away
  42. 1.7169 km W of Adak, Alaska · 1839 days ago · 12 km deep · 2 km away
  43. 1.5153 km WSW of Adak, Alaska · 1839 days ago · 14 km deep · 34 km away
  44. 1.6146 km W of Adak, Alaska · 1838 days ago · 16 km deep · 24 km away
  45. 2.7133 km W of Adak, Alaska · 1838 days ago · 141 km deep · 42 km away
  46. 1.782 km W of Adak, Alaska · 1837 days ago · 12 km deep · 88 km away
  47. 1.8184 km WSW of Adak, Alaska · 1837 days ago · 22 km deep · 64 km away
  48. 1.6194 km WSW of Adak, Alaska · 1837 days ago · 20 km deep · 47 km away
  49. 2.8223 km W of Adak, Alaska · 1836 days ago · 78 km deep · 54 km away
  50. 2.0133 km W of Adak, Alaska · 1834 days ago · 15 km deep · 38 km away
  51. 2.1136 km W of Adak, AK · 1834 days ago · 17 km deep · 36 km away
  52. 2.7215 km W of Adak, Alaska · 1834 days ago · 73 km deep · 45 km away
  53. 2.7201 km WSW of Adak, Alaska · 1831 days ago · 16 km deep · 75 km away
  54. 2.0114 km WSW of Adak, Alaska · 1831 days ago · 48 km deep · 83 km away
  55. 1.5114 km WSW of Adak, Alaska · 1831 days ago · 14 km deep · 69 km away
  56. 1.6124 km WSW of Adak, Alaska · 1830 days ago · 15 km deep · 65 km away
  57. 2.8220 km WSW of Adak, Alaska · 1830 days ago · 22 km deep · 80 km away
  58. 2.1135 km W of Adak, Alaska · 1830 days ago · 133 km deep · 48 km away
  59. 1.9252 km W of Adak, Alaska · 1830 days ago · 95 km deep · 83 km away
  60. 1.9100 km WSW of Adak, Alaska · 1829 days ago · 58 km deep · 89 km away

The first 60 of 140.

Before

  1. 3.1248 km W of Adak, Alaska · 1855 days ago · 77 km deep · 78 km away
  2. 1.9217 km WSW of Adak, Alaska · 1855 days ago · 6 km deep · 92 km away
  3. 1.6141 km WSW of Adak, Alaska · 1855 days ago · 13 km deep · 50 km away
  4. 1.5139 km WSW of Adak, Alaska · 1855 days ago · 22 km deep · 50 km away
  5. 1.8137 km WSW of Adak, Alaska · 1855 days ago · 9 km deep · 48 km away
  6. 3.4142 km WSW of Adak, Alaska · 1855 days ago · 17 km deep · 57 km away
  7. 1.9201 km WSW of Adak, Alaska · 1857 days ago · 70 km deep · 37 km away
  8. 3.6134 km WSW of Adak, Alaska · 1857 days ago · 41 km deep · 73 km away
  9. 1.9135 km WSW of Adak, Alaska · 1857 days ago · 35 km deep · 73 km away
  10. 1.9194 km WSW of Adak, Alaska · 1857 days ago · 13 km deep · 71 km away
  11. 1.5121 km SW of Adak, Alaska · 1857 days ago · 25 km deep · 98 km away
  12. 1.7252 km W of Adak, Alaska · 1857 days ago · 145 km deep · 89 km away
  13. 1.8106 km WSW of Adak, Alaska · 1857 days ago · 26 km deep · 91 km away
  14. 1.6247 km WSW of Adak, Alaska · 1858 days ago · 63 km deep · 78 km away
  15. 1.7132 km WSW of Adak, Alaska · 1858 days ago · 27 km deep · 74 km away
  16. 1.9203 km W of Adak, Alaska · 1858 days ago · 119 km deep · 38 km away
  17. 1.5133 km WSW of Adak, Alaska · 1859 days ago · 7 km deep · 43 km away
  18. 1.5133 km WSW of Adak, Alaska · 1859 days ago · 26 km deep · 75 km away
  19. 2.5135 km WSW of Adak, Alaska · 1859 days ago · 35 km deep · 76 km away
  20. 1.5132 km WSW of Adak, Alaska · 1859 days ago · 25 km deep · 75 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021azmmd4v. Read Thu, Sep 24, 2026, 8:51 AM UTC.