M1.9 earthquake 81 km WSW of Adak, Alaska

Magnitude

1.9 (ml), micro

Local time

Thu, Oct 7, 2021, 10:05 PM HADT

UTC

2021-10-08 07:05:09 UTC

Depth

30.2 km (18.7 mi), shallow

Epicenter

51.527° N, 177.678° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 2.5 km horizontally, 1.5 km in depth

Magnitude uncertainty

±0.13

Depth from

From location

Station coverage gap

346°, poorly surrounded by stations

Stations used

4

After

1. 3.270 km SW of Adak, AlaskaFri, Oct 8, 7:10 AM HADT · 1815 days ago · 49 km deep · 21 km away
2. 1.7163 km WSW of Adak, AlaskaFri, Oct 8, 9:25 AM HADT · 1815 days ago · 16 km deep · 88 km away
3. 1.745 km W of Adak, AlaskaSat, Oct 9, 2:34 AM HADT · 1815 days ago · 92 km deep · 42 km away
4. 2.6128 km WSW of Adak, AlaskaSat, Oct 9, 8:09 PM HADT · 1814 days ago · 19 km deep · 49 km away
5. 2.6154 km WSW of Adak, AlaskaSat, Oct 9, 10:07 PM HADT · 1814 days ago · 21 km deep · 77 km away
6. 1.782 km W of Adak, AlaskaSun, Oct 10, 7:57 AM HADT · 1813 days ago · 10 km deep · 38 km away
7. 3.0116 km WSW of Adak, AlaskaSun, Oct 10, 4:26 PM HADT · 1813 days ago · 34 km deep · 36 km away
8. 1.769 km WSW of Adak, AlaskaSun, Oct 10, 11:08 PM HADT · 1813 days ago · 25 km deep · 13 km away
9. 2.961 km SSW of Adak, AlaskaMon, Oct 11, 12:26 AM HADT · 1813 days ago · 51 km deep · 59 km away
10. 3.746 km S of Adak, AlaskaTue, Oct 12, 8:23 AM HADT · 1811 days ago · 35 km deep · 72 km away
11. 2.855 km S of Adak, AlaskaTue, Oct 12, 10:43 PM HADT · 1811 days ago · 32 km deep · 67 km away
12. 1.990 km SW of Adak, AlaskaWed, Oct 13, 3:46 AM HADT · 1810 days ago · 16 km deep · 14 km away
13. 3.144 km SSE of Adak, AlaskaThu, Oct 14, 1:39 AM HADT · 1810 days ago · 33 km deep · 96 km away
14. 2.7157 km WSW of Adak, AlaskaThu, Oct 14, 3:24 AM HADT · 1809 days ago · 95 km deep · 83 km away
15. 3.2157 km SW of Adak, AlaskaThu, Oct 14, 4:17 AM HADT · 1809 days ago · 33 km deep · 87 km away
16. 1.646 km S of Adak, AlaskaThu, Oct 14, 11:27 PM HADT · 1809 days ago · 30 km deep · 81 km away
17. 1.8Andreanof Islands, Aleutian Islands, AlaskaFri, Oct 15, 3:14 AM HADT · 1808 days ago · 26 km deep · 70 km away
18. 2.9139 km W of Adak, AlaskaFri, Oct 15, 9:55 AM HADT · 1808 days ago · 24 km deep · 79 km away
19. 1.652 km SW of Adak, AlaskaFri, Oct 15, 11:10 AM HADT · 1808 days ago · 39 km deep · 41 km away
20. 3.1Andreanof Islands, Aleutian Islands, AlaskaFri, Oct 22, 3:33 AM HADT · 1801 days ago · 146 km deep · 74 km away
21. 1.7117 km WSW of Adak, AlaskaFri, Oct 22, 10:16 PM HADT · 1801 days ago · 29 km deep · 36 km away
22. 1.8123 km WSW of Adak, AlaskaFri, Oct 22, 11:27 PM HADT · 1801 days ago · 17 km deep · 41 km away
23. 1.854 km SW of Adak, AlaskaSat, Oct 23, 3:06 AM HADT · 1800 days ago · 43 km deep · 42 km away
24. 2.072 km W of Adak, AlaskaSun, Oct 24, 7:10 PM HADT · 1799 days ago · 77 km deep · 26 km away
25. 1.9172 km WSW of Adak, AlaskaMon, Oct 25, 4:43 AM HADT · 1798 days ago · 22 km deep · 92 km away
26. 1.8126 km WSW of Adak, AlaskaMon, Oct 25, 5:34 AM HADT · 1798 days ago · 11 km deep · 51 km away
27. 2.0108 km W of Adak, AlaskaMon, Oct 25, 9:12 AM HADT · 1798 days ago · 83 km deep · 53 km away
28. 1.7127 km WSW of Adak, AlaskaMon, Oct 25, 9:19 AM HADT · 1798 days ago · 7 km deep · 50 km away
29. 1.760 km W of Adak, AlaskaTue, Oct 26, 3:02 AM HADT · 1797 days ago · 89 km deep · 36 km away
30. 1.843 km SSE of Adak, AlaskaTue, Oct 26, 9:22 AM HADT · 1797 days ago · 34 km deep · 93 km away
31. 1.843 km SSE of Adak, AlaskaTue, Oct 26, 8:06 PM HADT · 1797 days ago · 37 km deep · 85 km away
32. 3.2141 km WSW of Adak, AlaskaWed, Oct 27, 3:58 AM HADT · 1796 days ago · 31 km deep · 59 km away
33. 1.740 km SSE of Adak, AlaskaWed, Oct 27, 9:52 AM HADT · 1796 days ago · 36 km deep · 89 km away
34. 1.9123 km SW of Adak, AlaskaWed, Oct 27, 11:47 PM HADT · 1796 days ago · 22 km deep · 47 km away
35. 1.7100 km WSW of Adak, AlaskaThu, Oct 28, 12:22 AM HADT · 1796 days ago · 63 km deep · 21 km away
36. 3.2118 km SSW of Adak, AlaskaThu, Oct 28, 2:06 AM HADT · 1796 days ago · 33 km deep · 84 km away
37. 3.6Andreanof Islands, Aleutian Islands, AlaskaThu, Oct 28, 11:23 AM HADT · 1795 days ago · 82 km deep · 64 km away
38. 1.972 km WSW of Adak, AlaskaThu, Oct 28, 2:26 PM HADT · 1795 days ago · 66 km deep · 14 km away
39. 1.752 km SW of Adak, AlaskaThu, Oct 28, 4:41 PM HADT · 1795 days ago · 38 km deep · 43 km away
40. 2.949 km SSW of Adak, AlaskaThu, Oct 28, 10:55 PM HADT · 1795 days ago · 50 km deep · 62 km away
41. 3.8119 km WSW of Adak, AlaskaFri, Oct 29, 2:47 AM HADT · 1795 days ago · 88 km deep · 42 km away
42. 1.8147 km WSW of Adak, AlaskaSat, Oct 30, 6:09 AM HADT · 1793 days ago · 29 km deep · 65 km away
43. 1.8135 km SW of Adak, AlaskaSun, Oct 31, 12:10 AM HADT · 1793 days ago · 26 km deep · 58 km away
44. 3.775 km SW of Adak, AlaskaSun, Oct 31, 4:51 AM HADT · 1792 days ago · 35 km deep · 29 km away
45. 2.228 km NNW of Adak, AlaskaMon, Nov 1, 9:20 AM HADT · 1791 days ago · 110 km deep · 87 km away
46. 1.6Andreanof Islands, Aleutian Islands, AlaskaMon, Nov 1, 10:44 AM HADT · 1791 days ago · 8 km deep · 38 km away
47. 2.087 km S of Adak, AlaskaTue, Nov 2, 4:42 PM HADT · 1790 days ago · 16 km deep · 98 km away
48. 2.076 km WSW of Adak, AlaskaWed, Nov 3, 6:05 PM HADT · 1789 days ago · 26 km deep · 8 km away
49. 3.6108 km WSW of Adak, AlaskaThu, Nov 4, 6:43 AM HADT · 1788 days ago · 34 km deep · 27 km away
50. 1.684 km W of Adak, AlaskaThu, Nov 4, 7:26 AM HADT · 1788 days ago · 13 km deep · 39 km away
51. 1.5100 km WSW of Adak, AlaskaThu, Nov 4, 8:15 PM HADT · 1788 days ago · 22 km deep · 30 km away
52. 1.560 km SSW of Adak, AlaskaFri, Nov 5, 3:09 AM HADT · 1787 days ago · 32 km deep · 49 km away
53. 2.5159 km WSW of Adak, AlaskaFri, Nov 5, 2:35 PM HADT · 1787 days ago · 72 km deep · 79 km away
54. 1.7148 km W of Adak, AlaskaFri, Nov 5, 5:10 PM HADT · 1787 days ago · 13 km deep · 79 km away
55. 3.128 km ESE of Adak, AlaskaFri, Nov 5, 8:41 PM HADT · 1787 days ago · 71 km deep · 100 km away
56. 1.698 km SW of Adak, AlaskaSat, Nov 6, 12:32 AM HADT · 1787 days ago · 45 km deep · 22 km away
57. 2.080 km WSW of Adak, AlaskaSat, Nov 6, 5:11 PM HADT · 1786 days ago · 26 km deep · 5 km away
58. 1.853 km S of Adak, AlaskaSun, Nov 7, 6:53 AM HAST · 1785 days ago · 26 km deep · 76 km away
59. 3.1161 km WSW of Adak, AlaskaSun, Nov 7, 10:04 PM HAST · 1785 days ago · 10 km deep · 80 km away
60. 1.946 km SSE of Adak, AlaskaSun, Nov 7, 10:42 PM HAST · 1785 days ago · 40 km deep · 82 km away

The first 60 of 145.

Before

1. 2.9132 km WSW of Adak, AlaskaThu, Oct 7, 9:36 PM HADT · 1816 days ago · 10 km deep · 58 km away
2. 2.5105 km WSW of Adak, AlaskaThu, Oct 7, 2:25 AM HADT · 1817 days ago · 48 km deep · 24 km away
3. 1.8121 km SW of Adak, AlaskaWed, Oct 6, 11:19 PM HADT · 1817 days ago · 21 km deep · 43 km away
4. 1.6111 km SW of Adak, AlaskaWed, Oct 6, 10:02 PM HADT · 1817 days ago · 15 km deep · 42 km away
5. 1.6106 km SW of Adak, AlaskaWed, Oct 6, 9:54 PM HADT · 1817 days ago · 23 km deep · 31 km away
6. 1.6111 km SW of Adak, AlaskaWed, Oct 6, 8:56 PM HADT · 1817 days ago · 26 km deep · 46 km away
7. 1.8112 km SW of Adak, AlaskaWed, Oct 6, 8:53 PM HADT · 1817 days ago · 18 km deep · 50 km away
8. 1.9Andreanof Islands, Aleutian Islands, AlaskaWed, Oct 6, 8:43 PM HADT · 1817 days ago · 24 km deep · 49 km away
9. 2.5134 km WSW of Adak, AlaskaTue, Oct 5, 6:49 PM HADT · 1818 days ago · 21 km deep · 60 km away
10. 2.3130 km SW of Adak, AlaskaTue, Oct 5, 12:57 PM HADT · 1818 days ago · 28 km deep · 55 km away
11. 1.9132 km WSW of Adak, AlaskaTue, Oct 5, 9:08 AM HADT · 1818 days ago · 7 km deep · 58 km away
12. 3.1140 km SW of Adak, AlaskaTue, Oct 5, 5:42 AM HADT · 1818 days ago · 28 km deep · 61 km away
13. 1.8133 km SW of Adak, AlaskaSun, Oct 3, 12:33 PM HADT · 1820 days ago · 25 km deep · 53 km away
14. 1.539 km SSE of Adak, AlaskaSun, Oct 3, 11:36 AM HADT · 1820 days ago · 26 km deep · 90 km away
15. 1.9175 km WSW of Adak, AlaskaSun, Oct 3, 2:13 AM HADT · 1821 days ago · 20 km deep · 94 km away
16. 1.5174 km WSW of Adak, AlaskaSat, Oct 2, 10:24 PM HADT · 1821 days ago · 8 km deep · 96 km away
17. 3.9116 km WSW of Adak, AlaskaSat, Oct 2, 4:45 PM HADT · 1821 days ago · 35 km deep · 35 km away
18. 1.926 km S of Adak, AlaskaSat, Oct 2, 2:49 PM HADT · 1821 days ago · 63 km deep · 77 km away
19. 2.7116 km WSW of Adak, AlaskaSat, Oct 2, 10:35 AM HADT · 1821 days ago · 13 km deep · 36 km away
20. 1.7144 km WSW of Adak, AlaskaSat, Oct 2, 8:43 AM HADT · 1821 days ago · 24 km deep · 63 km away

From the USGS Earthquake Hazards Program and its partner networks, event av91042358. Read Sun, Sep 27, 2026, 11:31 PM UTC.