M1.6 earthquake 121 km W of Adak, Alaska

Magnitude

1.6 (ml), micro

Local time

Wed, Aug 18, 2021, 5:17 AM HADT

UTC

2021-08-18 14:17:12 UTC

Depth

91.5 km (56.9 mi), intermediate-depth

Epicenter

51.746° N, 178.388° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Stations used

29

After

1. 2.5135 km WSW of Adak, AlaskaWed, Aug 18, 11:12 AM HADT · 1867 days ago · 35 km deep · 57 km away
2. 3.6141 km WSW of Adak, AlaskaWed, Aug 18, 1:26 PM HADT · 1867 days ago · 31 km deep · 51 km away
3. 1.8175 km WSW of Adak, AlaskaWed, Aug 18, 6:20 PM HADT · 1867 days ago · 72 km deep · 56 km away
4. 1.654 km WNW of Adak, AlaskaWed, Aug 18, 11:08 PM HADT · 1867 days ago · 128 km deep · 76 km away
5. 1.6219 km W of Adak, AlaskaThu, Aug 19, 8:30 AM HADT · 1866 days ago · 92 km deep · 99 km away
6. 1.6197 km WSW of Adak, AlaskaThu, Aug 19, 9:53 AM HADT · 1866 days ago · 75 km deep · 77 km away
7. 2.9113 km WSW of Adak, AlaskaThu, Aug 19, 11:16 AM HADT · 1866 days ago · 66 km deep · 32 km away
8. 1.7120 km WSW of Adak, AlaskaThu, Aug 19, 5:36 PM HADT · 1866 days ago · 66 km deep · 25 km away
9. 1.9156 km WSW of Adak, AlaskaThu, Aug 19, 10:20 PM HADT · 1866 days ago · 17 km deep · 70 km away
10. 1.668 km SW of Adak, AlaskaSat, Aug 21, 2:56 AM HADT · 1864 days ago · 51 km deep · 77 km away
11. 4.8128 km WSW of Adak, AlaskaSun, Aug 22, 2:45 AM HADT · 1863 days ago · 52 km deep · 38 km away · felt by 1
12. 4.0131 km WSW of Adak, AlaskaSun, Aug 22, 2:46 AM HADT · 1863 days ago · 35 km deep · 48 km away
13. 2.8132 km WSW of Adak, AlaskaSun, Aug 22, 2:47 AM HADT · 1863 days ago · 35 km deep · 47 km away
14. 3.4133 km WSW of Adak, AlaskaSun, Aug 22, 2:50 AM HADT · 1863 days ago · 35 km deep · 52 km away
15. 1.8133 km WSW of Adak, AlaskaSun, Aug 22, 2:53 AM HADT · 1863 days ago · 25 km deep · 52 km away
16. 1.5132 km WSW of Adak, AlaskaSun, Aug 22, 3:05 AM HADT · 1863 days ago · 25 km deep · 51 km away
17. 2.5135 km WSW of Adak, AlaskaSun, Aug 22, 4:32 AM HADT · 1863 days ago · 35 km deep · 55 km away
18. 1.5133 km WSW of Adak, AlaskaSun, Aug 22, 6:17 AM HADT · 1863 days ago · 26 km deep · 53 km away
19. 1.5133 km WSW of Adak, AlaskaSun, Aug 22, 8:39 AM HADT · 1863 days ago · 7 km deep · 17 km away
20. 1.9203 km W of Adak, AlaskaSun, Aug 22, 3:39 PM HADT · 1863 days ago · 119 km deep · 85 km away
21. 1.550 km W of Adak, AlaskaSun, Aug 22, 9:16 PM HADT · 1863 days ago · 126 km deep · 75 km away
22. 2.055 km WSW of Adak, AlaskaMon, Aug 23, 2:13 AM HADT · 1862 days ago · 75 km deep · 67 km away
23. 1.7132 km WSW of Adak, AlaskaMon, Aug 23, 10:57 AM HADT · 1862 days ago · 27 km deep · 51 km away
24. 1.8106 km WSW of Adak, AlaskaMon, Aug 23, 2:28 PM HADT · 1862 days ago · 26 km deep · 54 km away
25. 1.5121 km SW of Adak, AlaskaMon, Aug 23, 5:48 PM HADT · 1862 days ago · 25 km deep · 68 km away
26. 1.9194 km WSW of Adak, AlaskaMon, Aug 23, 6:57 PM HADT · 1862 days ago · 13 km deep · 89 km away
27. 1.9135 km WSW of Adak, AlaskaTue, Aug 24, 3:05 AM HADT · 1861 days ago · 35 km deep · 52 km away
28. 3.6134 km WSW of Adak, AlaskaTue, Aug 24, 9:33 AM HADT · 1861 days ago · 41 km deep · 51 km away
29. 1.9201 km WSW of Adak, AlaskaTue, Aug 24, 12:02 PM HADT · 1861 days ago · 70 km deep · 80 km away
30. 2.5Andreanof Islands, Aleutian Islands, AlaskaTue, Aug 24, 6:05 PM HADT · 1861 days ago · 35 km deep · 75 km away
31. 3.4142 km WSW of Adak, AlaskaWed, Aug 25, 2:08 PM HADT · 1860 days ago · 17 km deep · 43 km away
32. 1.8137 km WSW of Adak, AlaskaWed, Aug 25, 3:59 PM HADT · 1860 days ago · 9 km deep · 29 km away
33. 1.5139 km WSW of Adak, AlaskaWed, Aug 25, 4:36 PM HADT · 1860 days ago · 22 km deep · 34 km away
34. 1.6141 km WSW of Adak, AlaskaWed, Aug 25, 9:06 PM HADT · 1860 days ago · 13 km deep · 36 km away
35. 1.665 km SSW of Adak, AlaskaThu, Aug 26, 9:09 AM HADT · 1859 days ago · 48 km deep · 97 km away
36. 2.062 km SSW of Adak, AlaskaThu, Aug 26, 10:26 AM HADT · 1859 days ago · 29 km deep · 99 km away
37. 1.543 km SW of Adak, AlaskaFri, Aug 27, 11:02 AM HADT · 1858 days ago · 64 km deep · 91 km away
38. 1.5171 km W of Adak, AlaskaFri, Aug 27, 1:13 PM HADT · 1858 days ago · 5 km deep · 49 km away
39. 1.559 km W of Adak, AlaskaFri, Aug 27, 6:10 PM HADT · 1858 days ago · 7 km deep · 62 km away
40. 1.559 km W of Adak, AlaskaFri, Aug 27, 7:15 PM HADT · 1858 days ago · 12 km deep · 62 km away
41. 3.2122 km SW of Adak, AlaskaSat, Aug 28, 1:14 AM HADT · 1857 days ago · 27 km deep · 71 km away
42. 2.687 km WSW of Adak, AlaskaSat, Aug 28, 9:57 AM HADT · 1857 days ago · 33 km deep · 53 km away
43. 2.683 km SW of Adak, AlaskaSat, Aug 28, 12:01 PM HADT · 1857 days ago · 33 km deep · 65 km away
44. 1.8Andreanof Islands, Aleutian Islands, AlaskaSat, Aug 28, 1:38 PM HADT · 1857 days ago · 13 km deep · 63 km away
45. 1.9141 km WSW of Adak, AlaskaSat, Aug 28, 2:03 PM HADT · 1857 days ago · 9 km deep · 36 km away
46. 1.597 km WSW of Adak, AlaskaSat, Aug 28, 2:05 PM HADT · 1857 days ago · 73 km deep · 34 km away
47. 1.8211 km W of Adak, AlaskaSat, Aug 28, 6:19 PM HADT · 1857 days ago · 92 km deep · 90 km away
48. 1.759 km W of Adak, AlaskaSun, Aug 29, 2:12 AM HADT · 1856 days ago · 7 km deep · 62 km away
49. 1.8145 km WSW of Adak, AlaskaSun, Aug 29, 3:41 AM HADT · 1856 days ago · 23 km deep · 60 km away
50. 2.5141 km WSW of Adak, AlaskaSun, Aug 29, 8:29 PM HADT · 1856 days ago · 30 km deep · 43 km away
51. 1.9111 km WSW of Adak, AlaskaSun, Aug 29, 8:57 PM HADT · 1856 days ago · 13 km deep · 31 km away
52. 1.9192 km W of Adak, AlaskaMon, Aug 30, 12:21 PM HADT · 1855 days ago · 148 km deep · 84 km away
53. 1.6194 km WSW of Adak, AlaskaWed, Sep 1, 11:00 PM HADT · 1853 days ago · 5 km deep · 91 km away
54. 1.5Andreanof Islands, Aleutian Islands, AlaskaFri, Sep 3, 3:43 AM HADT · 1851 days ago · 42 km deep · 51 km away
55. 1.5124 km WSW of Adak, AlaskaFri, Sep 3, 6:19 AM HADT · 1851 days ago · 7 km deep · 18 km away
56. 3.0123 km WSW of Adak, AlaskaSat, Sep 4, 3:07 PM HADT · 1850 days ago · 33 km deep · 37 km away
57. 1.8124 km WSW of Adak, AlaskaSat, Sep 4, 6:04 PM HADT · 1850 days ago · 70 km deep · 15 km away
58. 1.9134 km W of Adak, AlaskaSat, Sep 4, 10:19 PM HADT · 1850 days ago · 113 km deep · 23 km away
59. 1.7189 km WSW of Adak, AlaskaSun, Sep 5, 12:44 AM HADT · 1849 days ago · 3 km deep · 87 km away
60. 1.6124 km W of Adak, AlaskaSun, Sep 5, 1:14 AM HADT · 1849 days ago · 11 km deep · 9 km away

The first 60 of 162.

Before

1. 1.956 km W of Adak, AlaskaWed, Aug 18, 3:50 AM HADT · 1867 days ago · 92 km deep · 65 km away
2. 2.3169 km W of Adak, AlaskaTue, Aug 17, 6:25 PM HADT · 1868 days ago · 243 km deep · 52 km away
3. 2.1128 km SW of Adak, AlaskaTue, Aug 17, 2:13 PM HADT · 1868 days ago · 26 km deep · 69 km away
4. 3.2216 km WSW of Adak, AlaskaTue, Aug 17, 10:27 AM HADT · 1868 days ago · 35 km deep · 96 km away
5. 1.6132 km WSW of Adak, AlaskaTue, Aug 17, 9:16 AM HADT · 1868 days ago · 7 km deep · 16 km away
6. 2.760 km SW of Adak, AlaskaMon, Aug 16, 8:48 PM HADT · 1869 days ago · 69 km deep · 79 km away
7. 1.648 km SW of Adak, AlaskaMon, Aug 16, 1:41 PM HADT · 1869 days ago · 42 km deep · 95 km away
8. 3.2196 km WSW of Adak, AlaskaMon, Aug 16, 7:23 AM HADT · 1869 days ago · 35 km deep · 91 km away
9. 1.793 km WSW of Adak, AlaskaMon, Aug 16, 2:35 AM HADT · 1869 days ago · 13 km deep · 44 km away
10. 1.8216 km W of Adak, AlaskaSun, Aug 15, 7:39 PM HADT · 1870 days ago · 74 km deep · 94 km away
11. 1.8134 km SW of Adak, AlaskaSat, Aug 14, 7:50 PM HADT · 1871 days ago · 26 km deep · 70 km away
12. 1.7134 km SW of Adak, AlaskaSat, Aug 14, 7:49 PM HADT · 1871 days ago · 18 km deep · 77 km away
13. 1.7136 km SW of Adak, AlaskaSat, Aug 14, 7:45 PM HADT · 1871 days ago · 26 km deep · 71 km away
14. 2.8205 km WSW of Adak, AlaskaSat, Aug 14, 2:26 AM HADT · 1871 days ago · 33 km deep · 96 km away
15. 1.6133 km WSW of Adak, AlaskaSat, Aug 14, 1:10 AM HADT · 1871 days ago · 7 km deep · 16 km away
16. 1.7199 km WSW of Adak, AlaskaSat, Aug 14, 12:46 AM HADT · 1871 days ago · 26 km deep · 90 km away
17. 1.783 km SW of Adak, AlaskaFri, Aug 13, 11:26 PM HADT · 1872 days ago · 30 km deep · 61 km away
18. 1.7150 km W of Adak, AlaskaFri, Aug 13, 11:14 PM HADT · 1872 days ago · 4 km deep · 30 km away
19. 1.6115 km WSW of Adak, AlaskaFri, Aug 13, 12:13 PM HADT · 1872 days ago · 24 km deep · 44 km away
20. 1.5129 km WSW of Adak, AlaskaFri, Aug 13, 5:33 AM HADT · 1872 days ago · 7 km deep · 14 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak021akm1k9p. Read Mon, Sep 28, 2026, 9:02 PM UTC.