M1.8 earthquake 61 km SE of Adak, Alaska

Magnitude

1.8 (ml), micro

Local time

Tue, Sep 28, 2021, 3:03 PM HADT

UTC

2021-09-29 00:03:54 UTC

Depth

22.5 km (14.0 mi), shallow

Epicenter

51.489° N, 175.995° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Stations used

23

After

1. 3.837 km ENE of Adak, AlaskaThu, Sep 30, 4:32 PM HADT · 1819 days ago · 128 km deep · 55 km away
2. 2.623 km SSE of Adak, AlaskaFri, Oct 1, 6:13 AM HADT · 1819 days ago · 69 km deep · 40 km away
3. 4.749 km NE of Adak, AlaskaFri, Oct 1, 12:21 PM HADT · 1819 days ago · 129 km deep · 80 km away
4. 1.657 km ENE of Adak, AlaskaFri, Oct 1, 3:16 PM HADT · 1819 days ago · 86 km deep · 58 km away
5. 1.763 km SE of Adak, AlaskaFri, Oct 1, 8:15 PM HADT · 1818 days ago · 27 km deep · 2 km away
6. 1.926 km S of Adak, AlaskaSat, Oct 2, 2:49 PM HADT · 1818 days ago · 63 km deep · 43 km away
7. 1.967 km SE of Adak, AlaskaSun, Oct 3, 9:57 AM HADT · 1817 days ago · 22 km deep · 12 km away
8. 1.539 km SSE of Adak, AlaskaSun, Oct 3, 11:36 AM HADT · 1817 days ago · 26 km deep · 28 km away
9. 1.841 km NE of Adak, AlaskaMon, Oct 4, 12:39 PM HADT · 1816 days ago · 3 km deep · 67 km away
10. 1.975 km E of Adak, AlaskaTue, Oct 5, 3:27 AM HADT · 1815 days ago · 29 km deep · 48 km away
11. 1.9Andreanof Islands, Aleutian Islands, AlaskaWed, Oct 6, 8:43 PM HADT · 1813 days ago · 24 km deep · 75 km away
12. 3.270 km SW of Adak, AlaskaFri, Oct 8, 7:10 AM HADT · 1812 days ago · 49 km deep · 97 km away
13. 3.340 km SE of Adak, AlaskaFri, Oct 8, 8:19 AM HADT · 1812 days ago · 35 km deep · 21 km away
14. 1.966 km E of Adak, AlaskaFri, Oct 8, 4:51 PM HADT · 1811 days ago · 62 km deep · 47 km away
15. 1.745 km W of Adak, AlaskaSat, Oct 9, 2:34 AM HADT · 1811 days ago · 92 km deep · 96 km away
16. 3.863 km WSW of Atka, AlaskaSun, Oct 10, 1:59 AM HADT · 1810 days ago · 81 km deep · 83 km away
17. 1.9Andreanof Islands, Aleutian Islands, AlaskaSun, Oct 10, 2:41 AM HADT · 1810 days ago · 23 km deep · 12 km away
18. 2.165 km E of Adak, AlaskaSun, Oct 10, 11:04 AM HADT · 1810 days ago · 29 km deep · 42 km away
19. 2.961 km SSW of Adak, AlaskaMon, Oct 11, 12:26 AM HADT · 1809 days ago · 51 km deep · 64 km away
20. 3.746 km S of Adak, AlaskaTue, Oct 12, 8:23 AM HADT · 1808 days ago · 35 km deep · 45 km away
21. 2.855 km S of Adak, AlaskaTue, Oct 12, 10:43 PM HADT · 1807 days ago · 32 km deep · 53 km away
22. 3.144 km SSE of Adak, AlaskaThu, Oct 14, 1:39 AM HADT · 1806 days ago · 33 km deep · 21 km away
23. 1.646 km S of Adak, AlaskaThu, Oct 14, 11:27 PM HADT · 1805 days ago · 30 km deep · 36 km away
24. 1.890 km ESE of Adak, AlaskaThu, Oct 14, 11:52 PM HADT · 1805 days ago · 54 km deep · 47 km away
25. 2.560 km SE of Adak, AlaskaFri, Oct 15, 9:05 AM HADT · 1805 days ago · 36 km deep · 13 km away
26. 1.652 km SW of Adak, AlaskaFri, Oct 15, 11:10 AM HADT · 1805 days ago · 39 km deep · 75 km away
27. 2.885 km ESE of Adak, AlaskaFri, Oct 15, 11:13 AM HADT · 1805 days ago · 52 km deep · 45 km away
28. 3.050 km ESE of Adak, AlaskaWed, Oct 20, 8:10 AM HADT · 1800 days ago · 3 km deep · 27 km away · felt by 1
29. 3.693 km ESE of Adak, AlaskaWed, Oct 20, 8:49 AM HADT · 1800 days ago · 24 km deep · 51 km away
30. 1.854 km SW of Adak, AlaskaSat, Oct 23, 3:06 AM HADT · 1797 days ago · 43 km deep · 75 km away
31. 2.081 km ENE of Adak, AlaskaSat, Oct 23, 5:38 PM HADT · 1796 days ago · 115 km deep · 72 km away
32. 2.133 km ESE of Adak, AlaskaSun, Oct 24, 3:51 PM HADT · 1796 days ago · 62 km deep · 30 km away
33. 3.563 km ESE of Adak, AlaskaMon, Oct 25, 10:24 AM HADT · 1795 days ago · 35 km deep · 16 km away
34. 1.889 km SW of Atka, AlaskaMon, Oct 25, 12:09 PM HADT · 1795 days ago · 26 km deep · 68 km away
35. 1.658 km SE of Adak, AlaskaMon, Oct 25, 6:18 PM HADT · 1794 days ago · 25 km deep · 4 km away
36. 1.935 km E of Adak, AlaskaMon, Oct 25, 11:39 PM HADT · 1794 days ago · 125 km deep · 40 km away
37. 1.843 km SSE of Adak, AlaskaTue, Oct 26, 9:22 AM HADT · 1794 days ago · 34 km deep · 24 km away
38. 2.759 km SSE of Adak, AlaskaTue, Oct 26, 11:33 AM HADT · 1794 days ago · 34 km deep · 16 km away
39. 2.974 km W of Atka, AlaskaTue, Oct 26, 3:37 PM HADT · 1794 days ago · 252 km deep · 85 km away
40. 1.843 km SSE of Adak, AlaskaTue, Oct 26, 8:06 PM HADT · 1793 days ago · 37 km deep · 32 km away
41. 1.740 km SSE of Adak, AlaskaWed, Oct 27, 9:52 AM HADT · 1793 days ago · 36 km deep · 28 km away
42. 1.982 km ESE of Adak, AlaskaWed, Oct 27, 9:07 PM HADT · 1792 days ago · 48 km deep · 35 km away
43. 3.747 km NE of Adak, AlaskaWed, Oct 27, 11:20 PM HADT · 1792 days ago · 188 km deep · 73 km away
44. 2.657 km ESE of Adak, AlaskaThu, Oct 28, 3:58 AM HADT · 1792 days ago · 68 km deep · 23 km away
45. 1.985 km ESE of Adak, AlaskaThu, Oct 28, 4:08 AM HADT · 1792 days ago · 44 km deep · 42 km away
46. 2.062 km E of Adak, AlaskaThu, Oct 28, 1:08 PM HADT · 1792 days ago · 74 km deep · 54 km away
47. 2.073 km SE of Adak, AlaskaThu, Oct 28, 2:20 PM HADT · 1792 days ago · 23 km deep · 13 km away
48. 1.752 km SW of Adak, AlaskaThu, Oct 28, 4:41 PM HADT · 1791 days ago · 38 km deep · 74 km away
49. 1.881 km ESE of Adak, AlaskaThu, Oct 28, 10:29 PM HADT · 1791 days ago · 55 km deep · 39 km away
50. 2.949 km SSW of Adak, AlaskaThu, Oct 28, 10:55 PM HADT · 1791 days ago · 50 km deep · 56 km away
51. 2.678 km E of Adak, AlaskaFri, Oct 29, 9:40 AM HADT · 1791 days ago · 75 km deep · 54 km away
52. 1.634 km E of Adak, AlaskaFri, Oct 29, 10:54 PM HADT · 1790 days ago · 9 km deep · 48 km away
53. 1.9156 km SSE of Adak, AlaskaSun, Oct 31, 2:27 AM HADT · 1789 days ago · 36 km deep · 98 km away
54. 3.775 km SW of Adak, AlaskaSun, Oct 31, 4:51 AM HADT · 1789 days ago · 35 km deep · 95 km away
55. 1.980 km SSW of Atka, AlaskaSun, Oct 31, 5:53 AM HADT · 1789 days ago · 29 km deep · 90 km away
56. 2.790 km SSW of Atka, AlaskaSun, Oct 31, 6:04 AM HADT · 1789 days ago · 35 km deep · 95 km away
57. 3.343 km ENE of Adak, AlaskaMon, Nov 1, 6:48 AM HADT · 1788 days ago · 180 km deep · 64 km away
58. 2.228 km NNW of Adak, AlaskaMon, Nov 1, 9:20 AM HADT · 1788 days ago · 110 km deep · 89 km away
59. 2.087 km S of Adak, AlaskaTue, Nov 2, 4:42 PM HADT · 1786 days ago · 16 km deep · 54 km away
60. 2.675 km SSW of Atka, AlaskaWed, Nov 3, 8:06 PM HADT · 1785 days ago · 35 km deep · 86 km away

The first 60 of 114.

Before

1. 1.663 km SSW of Adak, AlaskaTue, Sep 28, 12:25 AM HADT · 1822 days ago · 20 km deep · 75 km away
2. 1.653 km SE of Adak, AlaskaMon, Sep 27, 2:21 PM HADT · 1823 days ago · 32 km deep · 9 km away
3. 2.861 km SE of Adak, AlaskaSun, Sep 26, 10:39 PM HADT · 1823 days ago · 35 km deep · 11 km away
4. 1.876 km ESE of Adak, AlaskaSat, Sep 25, 7:12 PM HADT · 1824 days ago · 20 km deep · 26 km away
5. 1.543 km S of Adak, AlaskaFri, Sep 24, 1:58 PM HADT · 1826 days ago · 43 km deep · 45 km away
6. 1.619 km SSW of Adak, AlaskaFri, Sep 24, 8:25 AM HADT · 1826 days ago · 75 km deep · 59 km away
7. 2.032 km E of Adak, AlaskaFri, Sep 24, 3:37 AM HADT · 1826 days ago · 75 km deep · 43 km away
8. 1.945 km NE of Adak, AlaskaThu, Sep 23, 12:25 PM HADT · 1827 days ago · 135 km deep · 76 km away
9. 1.579 km S of Adak, AlaskaThu, Sep 23, 7:08 AM HADT · 1827 days ago · 26 km deep · 48 km away
10. 1.762 km SE of Adak, AlaskaThu, Sep 23, 1:35 AM HADT · 1827 days ago · 43 km deep · 3 km away
11. 1.559 km SE of Adak, AlaskaWed, Sep 22, 10:44 PM HADT · 1827 days ago · 26 km deep · 3 km away
12. 2.753 km SE of Adak, AlaskaWed, Sep 22, 8:40 PM HADT · 1827 days ago · 35 km deep · 12 km away
13. 2.182 km ENE of Adak, AlaskaMon, Sep 20, 11:08 PM HADT · 1829 days ago · 90 km deep · 80 km away
14. 1.9Andreanof Islands, Aleutian Islands, AlaskaMon, Sep 20, 1:17 PM HADT · 1830 days ago · 36 km deep · 66 km away
15. 1.561 km ESE of Adak, AlaskaMon, Sep 20, 7:14 AM HADT · 1830 days ago · 44 km deep · 26 km away
16. 1.883 km E of Adak, AlaskaMon, Sep 20, 12:58 AM HADT · 1830 days ago · 64 km deep · 54 km away
17. 1.557 km ESE of Adak, AlaskaMon, Sep 20, 12:46 AM HADT · 1830 days ago · 44 km deep · 21 km away
18. 1.541 km SSE of Adak, AlaskaMon, Sep 20, 12:42 AM HADT · 1830 days ago · 36 km deep · 26 km away
19. 1.777 km SE of Adak, AlaskaSun, Sep 19, 9:09 PM HADT · 1830 days ago · 23 km deep · 19 km away
20. 1.644 km SSW of Adak, AlaskaSun, Sep 19, 7:25 PM HADT · 1830 days ago · 36 km deep · 53 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak021chu75nl. Read Thu, Sep 24, 2026, 12:49 PM UTC.