Alaska earthquakes

M1.9 earthquake 192 km W of Adak, Alaska

A magnitude 1.9 earthquake struck 192 km W of Adak, Alaska on Mon, Aug 30, 2021, 12:21 PM HADT (21:21 UTC), 148 km (92 mi) below the surface.

A larger quake followed: M4.0 257 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
1.9 (ml), micro
Local time
UTC
2021-08-30 21:21:04 UTC
Depth
147.7 km (91.8 mi), intermediate-depth
Epicenter
52.161° N, 179.404° 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
42

Nearby

Within 100 km, magnitude 1.5 and up: 68 in the 60 days after this one and 47 in the 30 days before it.

After

  1. 1.9243 km W of Adak, Alaska · 1852 days ago · 70 km deep · 75 km away
  2. 1.9257 km WSW of Adak, Alaska · 1850 days ago · 57 km deep · 100 km away
  3. 2.6221 km WSW of Adak, Alaska · 1849 days ago · 88 km deep · 91 km away
  4. 1.6232 km WSW of Adak, Alaska · 1849 days ago · 11 km deep · 82 km away
  5. 1.5Andreanof Islands, Aleutian Islands, Alaska · 1848 days ago · 42 km deep · 93 km away
  6. 1.9232 km WSW of Adak, Alaska · 1848 days ago · 7 km deep · 83 km away
  7. 1.6234 km WSW of Adak, Alaska · 1848 days ago · 13 km deep · 83 km away
  8. 1.5124 km WSW of Adak, Alaska · 1848 days ago · 7 km deep · 96 km away
  9. 1.8231 km WSW of Adak, Alaska · 1848 days ago · 13 km deep · 81 km away
  10. 1.8124 km WSW of Adak, Alaska · 1847 days ago · 70 km deep · 93 km away
  11. 1.9134 km W of Adak, Alaska · 1847 days ago · 113 km deep · 62 km away
  12. 1.6124 km W of Adak, Alaska · 1847 days ago · 11 km deep · 76 km away
  13. 2.6245 km W of Adak, Alaska · 1845 days ago · 174 km deep · 59 km away
  14. 1.5225 km W of Adak, Alaska · 1844 days ago · 73 km deep · 67 km away
  15. 1.5185 km W of Adak, Alaska · 1844 days ago · 15 km deep · 37 km away
  16. 1.5155 km W of Adak, Alaska · 1843 days ago · 2 km deep · 54 km away
  17. 2.2228 km W of Adak, Alaska · 1842 days ago · 149 km deep · 44 km away
  18. 3.9250 km W of Adak, Alaska · 1841 days ago · 131 km deep · 69 km away
  19. 1.7169 km W of Adak, Alaska · 1841 days ago · 12 km deep · 52 km away
  20. 1.5153 km WSW of Adak, Alaska · 1840 days ago · 14 km deep · 84 km away
  21. 2.7272 km W of Adak, Alaska · 1840 days ago · 75 km deep · 99 km away
  22. 1.6146 km W of Adak, Alaska · 1839 days ago · 16 km deep · 63 km away
  23. 2.7133 km W of Adak, Alaska · 1839 days ago · 141 km deep · 63 km away
  24. 1.6194 km WSW of Adak, Alaska · 1838 days ago · 20 km deep · 92 km away
  25. 2.8223 km W of Adak, Alaska · 1838 days ago · 78 km deep · 73 km away
  26. 2.0133 km W of Adak, Alaska · 1836 days ago · 15 km deep · 78 km away
  27. 2.1136 km W of Adak, AK · 1836 days ago · 17 km deep · 76 km away
  28. 2.7215 km W of Adak, Alaska · 1835 days ago · 73 km deep · 68 km away
  29. 2.1135 km W of Adak, Alaska · 1831 days ago · 133 km deep · 57 km away
  30. 1.9252 km W of Adak, Alaska · 1831 days ago · 95 km deep · 72 km away
  31. 4.0257 km WSW of Adak, Alaska · 1830 days ago · 106 km deep · 99 km away
  32. 2.0168 km WSW of Adak, Alaska · 1829 days ago · 26 km deep · 94 km away
  33. 1.9129 km W of Adak, Alaska · 1829 days ago · 13 km deep · 82 km away
  34. 1.8129 km WSW of Adak, Alaska · 1829 days ago · 11 km deep · 96 km away
  35. 1.9222 km WSW of Adak, Alaska · 1829 days ago · 12 km deep · 80 km away
  36. 2.0133 km W of Adak, Alaska · 1828 days ago · 132 km deep · 60 km away
  37. 3.1121 km WSW of Adak, Alaska · 1828 days ago · 78 km deep · 93 km away
  38. 1.6221 km WSW of Adak, Alaska · 1826 days ago · 50 km deep · 85 km away
  39. 2.0211 km W of Adak, Alaska · 1826 days ago · 104 km deep · 46 km away
  40. 3.1179 km WSW of Adak, Alaska · 1825 days ago · 63 km deep · 87 km away
  41. 1.8133 km W of Adak, Alaska · 1824 days ago · 8 km deep · 78 km away
  42. 1.7Andreanof Islands, Aleutian Islands, Alaska · 1824 days ago · 21 km deep · 75 km away
  43. 2.5114 km W of Adak, Alaska · 1823 days ago · 137 km deep · 79 km away
  44. 2.3172 km WSW of Adak, Alaska · 1821 days ago · 21 km deep · 91 km away
  45. 1.5174 km WSW of Adak, Alaska · 1819 days ago · 8 km deep · 83 km away
  46. 1.9132 km WSW of Adak, Alaska · 1816 days ago · 7 km deep · 87 km away
  47. 2.5134 km WSW of Adak, Alaska · 1816 days ago · 21 km deep · 85 km away
  48. 1.8244 km W of Adak, Alaska · 1815 days ago · 61 km deep · 86 km away
  49. 2.9132 km WSW of Adak, Alaska · 1814 days ago · 10 km deep · 88 km away
  50. 2.8266 km W of Adak, Alaska · 1813 days ago · 86 km deep · 91 km away
  51. 1.7163 km WSW of Adak, Alaska · 1813 days ago · 16 km deep · 74 km away
  52. 2.6154 km WSW of Adak, Alaska · 1812 days ago · 21 km deep · 83 km away
  53. 2.5182 km WSW of Adak, Alaska · 1811 days ago · 29 km deep · 100 km away
  54. 1.9244 km WSW of Adak, Alaska · 1811 days ago · 48 km deep · 97 km away
  55. 3.1216 km W of Adak, Alaska · 1808 days ago · 110 km deep · 48 km away
  56. 2.7157 km WSW of Adak, Alaska · 1807 days ago · 95 km deep · 72 km away
  57. 2.9139 km W of Adak, Alaska · 1806 days ago · 24 km deep · 59 km away
  58. 3.2181 km WSW of Adak, Alaska · 1805 days ago · 30 km deep · 88 km away
  59. 3.1Andreanof Islands, Aleutian Islands, Alaska · 1799 days ago · 146 km deep · 76 km away
  60. 2.6223 km W of Adak, Alaska · 1798 days ago · 84 km deep · 63 km away

The first 60 of 68.

Before

  1. 1.9230 km W of Adak, Alaska · 1854 days ago · 93 km deep · 60 km away
  2. 1.8211 km W of Adak, Alaska · 1854 days ago · 92 km deep · 52 km away
  3. 1.9141 km WSW of Adak, Alaska · 1854 days ago · 9 km deep · 99 km away
  4. 1.5171 km W of Adak, Alaska · 1855 days ago · 5 km deep · 52 km away
  5. 3.0254 km WNW of Adak, Alaska · 1855 days ago · 188 km deep · 63 km away
  6. 3.1248 km W of Adak, Alaska · 1856 days ago · 77 km deep · 83 km away
  7. 1.6141 km WSW of Adak, Alaska · 1857 days ago · 13 km deep · 99 km away
  8. 1.5139 km WSW of Adak, Alaska · 1857 days ago · 22 km deep · 99 km away
  9. 1.8137 km WSW of Adak, Alaska · 1857 days ago · 9 km deep · 95 km away
  10. 1.9201 km WSW of Adak, Alaska · 1858 days ago · 70 km deep · 75 km away
  11. 1.8263 km W of Adak, Alaska · 1859 days ago · 169 km deep · 72 km away
  12. 1.7252 km W of Adak, Alaska · 1859 days ago · 145 km deep · 62 km away
  13. 1.6247 km WSW of Adak, Alaska · 1859 days ago · 63 km deep · 91 km away
  14. 1.9203 km W of Adak, Alaska · 1860 days ago · 119 km deep · 33 km away
  15. 1.5133 km WSW of Adak, Alaska · 1860 days ago · 7 km deep · 86 km away
  16. 3.6262 km W of Adak, Alaska · 1863 days ago · 80 km deep · 90 km away
  17. 1.6197 km WSW of Adak, Alaska · 1863 days ago · 75 km deep · 74 km away
  18. 1.6219 km W of Adak, Alaska · 1863 days ago · 92 km deep · 51 km away
  19. 1.8175 km WSW of Adak, Alaska · 1864 days ago · 72 km deep · 76 km away
  20. 1.6121 km W of Adak, Alaska · 1864 days ago · 92 km deep · 84 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021b4koltr. Read Fri, Sep 25, 2026, 11:09 PM UTC.