M1.8 earthquake 263 km W of Adak, Alaska

Magnitude

1.8 (ml), micro

Local time

Tue, Aug 24, 2021, 10:57 PM GMT+12

UTC

2021-08-24 10:57:24 UTC

Depth

169.4 km (105.3 mi), intermediate-depth

Epicenter

52.112° N, 179.549° E

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Stations used

20

After

1. 2.5Rat Islands, Aleutian Islands, AlaskaWed, Aug 25, 3:47 AM GMT+12 · 1860 days ago · 94 km deep · 95 km away
2. 1.7Rat Islands, Aleutian Islands, AlaskaWed, Aug 25, 5:30 AM GMT+12 · 1860 days ago · 51 km deep · 82 km away
3. 1.9201 km WSW of Adak, AlaskaTue, Aug 24, 12:02 PM HADT · 1860 days ago · 70 km deep · 96 km away
4. 4.8Rat Islands, Aleutian Islands, AlaskaWed, Aug 25, 10:15 PM GMT+12 · 1860 days ago · 126 km deep · 89 km away
5. 1.6294 km WSW of Adak, AlaskaThu, Aug 26, 8:28 PM GMT+12 · 1859 days ago · 37 km deep · 96 km away
6. 3.1248 km W of Adak, AlaskaFri, Aug 27, 7:07 AM GMT+12 · 1858 days ago · 77 km deep · 59 km away
7. 2.6Rat Islands, Aleutian Islands, AlaskaFri, Aug 27, 11:15 PM GMT+12 · 1857 days ago · 108 km deep · 82 km away
8. 3.0254 km WNW of Adak, AlaskaSat, Aug 28, 2:30 AM GMT+12 · 1857 days ago · 188 km deep · 33 km away
9. 1.5254 km WSW of Adak, AlaskaSat, Aug 28, 11:38 PM GMT+12 · 1856 days ago · 16 km deep · 84 km away
10. 1.8211 km W of Adak, AlaskaSat, Aug 28, 6:19 PM HADT · 1856 days ago · 92 km deep · 68 km away
11. 1.9230 km W of Adak, AlaskaSat, Aug 28, 8:03 PM HADT · 1856 days ago · 93 km deep · 51 km away
12. 2.6Rat Islands, Aleutian Islands, AlaskaMon, Aug 30, 3:31 AM GMT+12 · 1855 days ago · 138 km deep · 87 km away
13. 1.8Rat Islands, Aleutian Islands, AlaskaMon, Aug 30, 8:22 PM GMT+12 · 1855 days ago · 131 km deep · 51 km away
14. 1.9192 km W of Adak, AlaskaMon, Aug 30, 12:21 PM HADT · 1854 days ago · 148 km deep · 72 km away
15. 2.0Rat Islands, Aleutian Islands, AlaskaTue, Aug 31, 11:12 AM GMT+12 · 1854 days ago · 93 km deep · 50 km away
16. 1.9243 km W of Adak, AlaskaTue, Aug 31, 3:30 PM GMT+12 · 1854 days ago · 70 km deep · 54 km away
17. 2.0Rat Islands, Aleutian Islands, AlaskaTue, Aug 31, 7:59 PM GMT+12 · 1854 days ago · 129 km deep · 93 km away
18. 1.9257 km WSW of Adak, AlaskaThu, Sep 2, 6:05 PM GMT+12 · 1852 days ago · 57 km deep · 74 km away
19. 1.6248 km WSW of Adak, AlaskaThu, Sep 2, 7:46 PM GMT+12 · 1852 days ago · 48 km deep · 85 km away
20. 2.6221 km WSW of Adak, AlaskaThu, Sep 2, 3:19 AM HADT · 1851 days ago · 88 km deep · 96 km away
21. 1.5272 km W of Adak, AlaskaFri, Sep 3, 2:34 AM GMT+12 · 1851 days ago · 70 km deep · 61 km away
22. 1.6232 km WSW of Adak, AlaskaFri, Sep 3, 1:30 AM HADT · 1851 days ago · 11 km deep · 76 km away
23. 1.9232 km WSW of Adak, AlaskaFri, Sep 3, 6:10 AM HADT · 1850 days ago · 7 km deep · 77 km away
24. 1.6234 km WSW of Adak, AlaskaFri, Sep 3, 6:11 AM HADT · 1850 days ago · 13 km deep · 75 km away
25. 1.8231 km WSW of Adak, AlaskaFri, Sep 3, 8:43 AM HADT · 1850 days ago · 13 km deep · 76 km away
26. 1.7271 km W of Adak, AlaskaSat, Sep 4, 5:27 PM GMT+12 · 1850 days ago · 63 km deep · 58 km away
27. 2.5Rat Islands, Aleutian Islands, AlaskaSat, Sep 4, 6:23 PM GMT+12 · 1850 days ago · 95 km deep · 62 km away
28. 1.8Rat Islands, Aleutian Islands, AlaskaSun, Sep 5, 7:48 PM GMT+12 · 1849 days ago · 11 km deep · 90 km away
29. 1.7Rat Islands, Aleutian Islands, AlaskaMon, Sep 6, 1:12 AM GMT+12 · 1848 days ago · 12 km deep · 89 km away
30. 1.8Rat Islands, Aleutian Islands, AlaskaMon, Sep 6, 1:16 AM GMT+12 · 1848 days ago · 13 km deep · 88 km away
31. 1.6Rat Islands, Aleutian Islands, AlaskaMon, Sep 6, 1:17 AM GMT+12 · 1848 days ago · 13 km deep · 83 km away
32. 1.8Rat Islands, Aleutian Islands, AlaskaMon, Sep 6, 1:47 AM GMT+12 · 1848 days ago · 12 km deep · 92 km away
33. 1.6Rat Islands, Aleutian Islands, AlaskaMon, Sep 6, 2:11 AM GMT+12 · 1848 days ago · 12 km deep · 78 km away
34. 1.6Rat Islands, Aleutian Islands, AlaskaMon, Sep 6, 4:49 AM GMT+12 · 1848 days ago · 11 km deep · 93 km away
35. 1.9Rat Islands, Aleutian Islands, AlaskaTue, Sep 7, 12:22 PM GMT+12 · 1847 days ago · 115 km deep · 77 km away
36. 2.6245 km W of Adak, AlaskaTue, Sep 7, 12:32 PM GMT+12 · 1847 days ago · 174 km deep · 25 km away
37. 1.5225 km W of Adak, AlaskaTue, Sep 7, 5:19 AM HADT · 1846 days ago · 73 km deep · 66 km away
38. 1.7Rat Islands, Aleutian Islands, AlaskaWed, Sep 8, 11:34 AM GMT+12 · 1846 days ago · 99 km deep · 76 km away
39. 1.7Rat Islands, Aleutian Islands, AlaskaWed, Sep 8, 2:44 PM GMT+12 · 1846 days ago · 82 km deep · 62 km away
40. 1.5185 km W of Adak, AlaskaTue, Sep 7, 8:33 PM HADT · 1846 days ago · 15 km deep · 83 km away
41. 2.2228 km W of Adak, AlaskaThu, Sep 9, 12:17 PM HADT · 1844 days ago · 149 km deep · 38 km away
42. 3.9250 km W of Adak, AlaskaSat, Sep 11, 2:06 AM GMT+12 · 1843 days ago · 131 km deep · 31 km away
43. 2.3Rat Islands, Aleutian Islands, AlaskaSat, Sep 11, 7:46 PM GMT+12 · 1843 days ago · 3 km deep · 75 km away
44. 2.7272 km W of Adak, AlaskaSun, Sep 12, 5:10 PM GMT+12 · 1842 days ago · 75 km deep · 54 km away
45. 2.8223 km W of Adak, AlaskaMon, Sep 13, 1:06 PM HADT · 1840 days ago · 78 km deep · 74 km away
46. 3.1Rat Islands, Aleutian Islands, AlaskaWed, Sep 15, 5:38 PM GMT+12 · 1839 days ago · 113 km deep · 83 km away
47. 2.7215 km W of Adak, AlaskaThu, Sep 16, 3:18 AM HADT · 1837 days ago · 73 km deep · 77 km away
48. 1.9252 km W of Adak, AlaskaTue, Sep 21, 8:56 AM GMT+12 · 1833 days ago · 95 km deep · 34 km away
49. 1.8Rat Islands, Aleutian Islands, AlaskaWed, Sep 22, 4:16 AM GMT+12 · 1832 days ago · 56 km deep · 67 km away
50. 4.0257 km WSW of Adak, AlaskaWed, Sep 22, 6:48 AM GMT+12 · 1832 days ago · 106 km deep · 73 km away
51. 1.6Rat Islands, Aleutian Islands, AlaskaWed, Sep 22, 7:27 AM GMT+12 · 1832 days ago · 30 km deep · 88 km away
52. 1.9222 km WSW of Adak, AlaskaThu, Sep 23, 12:30 AM HADT · 1831 days ago · 12 km deep · 84 km away
53. 1.5Rat Islands, Aleutian Islands, AlaskaFri, Sep 24, 8:16 PM GMT+12 · 1830 days ago · 57 km deep · 77 km away
54. 1.6221 km WSW of Adak, AlaskaSat, Sep 25, 6:53 PM HADT · 1828 days ago · 50 km deep · 90 km away
55. 2.0211 km W of Adak, AlaskaSat, Sep 25, 11:04 PM HADT · 1828 days ago · 104 km deep · 63 km away
56. 3.8Rat Islands, Aleutian Islands, AlaskaSun, Oct 3, 10:01 AM GMT+12 · 1821 days ago · 112 km deep · 85 km away
57. 1.8244 km W of Adak, AlaskaThu, Oct 7, 1:26 PM GMT+12 · 1817 days ago · 61 km deep · 69 km away
58. 2.5Rat Islands, Aleutian Islands, AlaskaThu, Oct 7, 2:56 PM GMT+12 · 1817 days ago · 77 km deep · 74 km away
59. 2.1Rat Islands, Aleutian Islands, AlaskaThu, Oct 7, 4:34 PM GMT+12 · 1817 days ago · 8 km deep · 81 km away
60. 2.6Rat Islands, Aleutian Islands, AlaskaThu, Oct 7, 10:48 PM GMT+12 · 1816 days ago · 97 km deep · 74 km away

The first 60 of 81.

Before

1. 2.0Rat Islands, Aleutian Islands, AlaskaTue, Aug 24, 4:10 PM GMT+12 · 1861 days ago · 137 km deep · 99 km away
2. 1.7252 km W of Adak, AlaskaTue, Aug 24, 1:01 PM GMT+12 · 1861 days ago · 145 km deep · 12 km away
3. 1.6247 km WSW of Adak, AlaskaTue, Aug 24, 9:11 AM GMT+12 · 1861 days ago · 63 km deep · 72 km away
4. 1.8Rat Islands, Aleutian Islands, AlaskaMon, Aug 23, 4:24 PM GMT+12 · 1862 days ago · 86 km deep · 67 km away
5. 1.9203 km W of Adak, AlaskaSun, Aug 22, 3:39 PM HADT · 1862 days ago · 119 km deep · 63 km away
6. 1.6Rat Islands, Aleutian Islands, AlaskaMon, Aug 23, 10:41 AM GMT+12 · 1862 days ago · 89 km deep · 66 km away
7. 2.9256 km WSW of Adak, AlaskaSat, Aug 21, 9:32 AM GMT+12 · 1864 days ago · 25 km deep · 96 km away
8. 1.7296 km WSW of Adak, AlaskaSat, Aug 21, 2:22 AM GMT+12 · 1864 days ago · 42 km deep · 98 km away
9. 3.6262 km W of Adak, AlaskaFri, Aug 20, 6:10 PM GMT+12 · 1865 days ago · 80 km deep · 52 km away
10. 1.5Rat Islands, Aleutian Islands, AlaskaFri, Aug 20, 3:44 PM GMT+12 · 1865 days ago · 65 km deep · 96 km away
11. 1.6197 km WSW of Adak, AlaskaThu, Aug 19, 9:53 AM HADT · 1865 days ago · 75 km deep · 98 km away
12. 1.6219 km W of Adak, AlaskaThu, Aug 19, 8:30 AM HADT · 1865 days ago · 92 km deep · 57 km away
13. 3.5Rat Islands, Aleutian Islands, AlaskaFri, Aug 20, 4:54 AM GMT+12 · 1865 days ago · 57 km deep · 87 km away
14. 2.6257 km W of Adak, AlaskaWed, Aug 18, 9:10 PM GMT+12 · 1867 days ago · 10 km deep · 22 km away
15. 2.3169 km W of Adak, AlaskaTue, Aug 17, 6:25 PM HADT · 1867 days ago · 243 km deep · 95 km away
16. 3.2216 km WSW of Adak, AlaskaTue, Aug 17, 10:27 AM HADT · 1867 days ago · 35 km deep · 91 km away
17. 2.1Rat Islands, Aleutian Islands, AlaskaWed, Aug 18, 5:02 AM GMT+12 · 1867 days ago · 138 km deep · 56 km away
18. 1.5267 km W of Adak, AlaskaTue, Aug 17, 10:27 PM GMT+12 · 1868 days ago · 67 km deep · 57 km away
19. 1.6256 km W of Adak, AlaskaTue, Aug 17, 10:06 PM GMT+12 · 1868 days ago · 15 km deep · 22 km away
20. 1.8216 km W of Adak, AlaskaSun, Aug 15, 7:39 PM HADT · 1869 days ago · 74 km deep · 72 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak021auh4ibk. Read Sun, Sep 27, 2026, 10:10 PM UTC.