M1.8 earthquake 83 km E of Adak, Alaska

Magnitude

1.8 (ml), micro

Local time

Mon, Sep 20, 2021, 12:58 AM HADT

UTC

2021-09-20 09:58:47 UTC

Depth

64.4 km (40.0 mi), shallow

Epicenter

51.823° N, 175.418° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Stations used

26

After

1. 1.561 km ESE of Adak, AlaskaMon, Sep 20, 7:14 AM HADT · 1830 days ago · 44 km deep · 30 km away
2. 2.970 km NE of Adak, AlaskaMon, Sep 20, 9:54 AM HADT · 1830 days ago · 228 km deep · 76 km away
3. 1.9Andreanof Islands, Aleutian Islands, AlaskaMon, Sep 20, 1:17 PM HADT · 1830 days ago · 36 km deep · 33 km away
4. 2.182 km ENE of Adak, AlaskaMon, Sep 20, 11:08 PM HADT · 1829 days ago · 90 km deep · 35 km away
5. 2.753 km SE of Adak, AlaskaWed, Sep 22, 8:40 PM HADT · 1827 days ago · 35 km deep · 63 km away
6. 1.559 km SE of Adak, AlaskaWed, Sep 22, 10:44 PM HADT · 1827 days ago · 26 km deep · 53 km away
7. 1.762 km SE of Adak, AlaskaThu, Sep 23, 1:35 AM HADT · 1827 days ago · 43 km deep · 52 km away
8. 1.664 km SSW of Atka, AlaskaThu, Sep 23, 6:54 AM HADT · 1827 days ago · 21 km deep · 64 km away
9. 1.945 km NE of Adak, AlaskaThu, Sep 23, 12:25 PM HADT · 1827 days ago · 135 km deep · 64 km away
10. 1.8Andreanof Islands, Aleutian Islands, AlaskaThu, Sep 23, 1:31 PM HADT · 1827 days ago · 56 km deep · 88 km away
11. 2.032 km E of Adak, AlaskaFri, Sep 24, 3:37 AM HADT · 1826 days ago · 75 km deep · 51 km away
12. 1.619 km SSW of Adak, AlaskaFri, Sep 24, 8:25 AM HADT · 1826 days ago · 75 km deep · 93 km away
13. 1.543 km S of Adak, AlaskaFri, Sep 24, 1:58 PM HADT · 1825 days ago · 43 km deep · 93 km away
14. 2.951 km SSW of Atka, AlaskaSat, Sep 25, 5:26 PM HADT · 1824 days ago · 35 km deep · 66 km away
15. 1.876 km ESE of Adak, AlaskaSat, Sep 25, 7:12 PM HADT · 1824 days ago · 20 km deep · 32 km away
16. 2.861 km SE of Adak, AlaskaSun, Sep 26, 10:39 PM HADT · 1823 days ago · 35 km deep · 65 km away
17. 1.653 km SE of Adak, AlaskaMon, Sep 27, 2:21 PM HADT · 1822 days ago · 32 km deep · 53 km away
18. 1.861 km SE of Adak, AlaskaTue, Sep 28, 3:03 PM HADT · 1821 days ago · 23 km deep · 54 km away
19. 3.837 km ENE of Adak, AlaskaThu, Sep 30, 4:32 PM HADT · 1819 days ago · 128 km deep · 50 km away
20. 2.623 km SSE of Adak, AlaskaFri, Oct 1, 6:13 AM HADT · 1819 days ago · 69 km deep · 75 km away
21. 4.749 km NE of Adak, AlaskaFri, Oct 1, 12:21 PM HADT · 1819 days ago · 129 km deep · 66 km away
22. 1.657 km ENE of Adak, AlaskaFri, Oct 1, 3:16 PM HADT · 1818 days ago · 86 km deep · 34 km away
23. 1.763 km SE of Adak, AlaskaFri, Oct 1, 8:15 PM HADT · 1818 days ago · 27 km deep · 53 km away
24. 2.191 km S of Atka, AlaskaSat, Oct 2, 8:27 AM HADT · 1818 days ago · 4 km deep · 85 km away
25. 1.926 km S of Adak, AlaskaSat, Oct 2, 2:49 PM HADT · 1817 days ago · 63 km deep · 82 km away
26. 1.967 km SE of Adak, AlaskaSun, Oct 3, 9:57 AM HADT · 1817 days ago · 22 km deep · 44 km away
27. 1.539 km SSE of Adak, AlaskaSun, Oct 3, 11:36 AM HADT · 1817 days ago · 26 km deep · 73 km away
28. 1.841 km NE of Adak, AlaskaMon, Oct 4, 12:39 PM HADT · 1816 days ago · 3 km deep · 58 km away
29. 1.975 km E of Adak, AlaskaTue, Oct 5, 3:27 AM HADT · 1815 days ago · 29 km deep · 9 km away
30. 3.633 km SSW of Atka, AlaskaWed, Oct 6, 10:09 AM HADT · 1814 days ago · 75 km deep · 78 km away
31. 3.340 km SE of Adak, AlaskaFri, Oct 8, 8:19 AM HADT · 1812 days ago · 35 km deep · 61 km away
32. 1.966 km E of Adak, AlaskaFri, Oct 8, 4:51 PM HADT · 1811 days ago · 62 km deep · 18 km away
33. 3.884 km NE of Adak, AlaskaSat, Oct 9, 2:07 PM HADT · 1810 days ago · 182 km deep · 69 km away
34. 3.863 km WSW of Atka, AlaskaSun, Oct 10, 1:59 AM HADT · 1810 days ago · 81 km deep · 31 km away
35. 1.9Andreanof Islands, Aleutian Islands, AlaskaSun, Oct 10, 2:41 AM HADT · 1810 days ago · 23 km deep · 65 km away
36. 2.995 km S of Atka, AlaskaSun, Oct 10, 6:13 AM HADT · 1810 days ago · 17 km deep · 92 km away
37. 3.127 km SW of Atka, AlaskaSun, Oct 10, 10:21 AM HADT · 1810 days ago · 35 km deep · 69 km away
38. 2.165 km E of Adak, AlaskaSun, Oct 10, 11:04 AM HADT · 1810 days ago · 29 km deep · 19 km away
39. 4.981 km S of Atka, AlaskaMon, Oct 11, 9:25 AM HADT · 1809 days ago · 35 km deep · 78 km away
40. 3.746 km S of Adak, AlaskaTue, Oct 12, 8:23 AM HADT · 1808 days ago · 35 km deep · 94 km away
41. 3.144 km SSE of Adak, AlaskaThu, Oct 14, 1:39 AM HADT · 1806 days ago · 33 km deep · 68 km away
42. 3.134 km WSW of Atka, AlaskaThu, Oct 14, 2:52 AM HADT · 1806 days ago · 138 km deep · 59 km away
43. 1.646 km S of Adak, AlaskaThu, Oct 14, 11:27 PM HADT · 1805 days ago · 30 km deep · 86 km away
44. 1.890 km ESE of Adak, AlaskaThu, Oct 14, 11:52 PM HADT · 1805 days ago · 54 km deep · 18 km away
45. 1.959 km WNW of Atka, AlaskaFri, Oct 15, 5:05 AM HADT · 1805 days ago · 108 km deep · 75 km away
46. 1.822 km SW of Atka, AlaskaFri, Oct 15, 6:50 AM HADT · 1805 days ago · 72 km deep · 71 km away
47. 2.560 km SE of Adak, AlaskaFri, Oct 15, 9:05 AM HADT · 1805 days ago · 36 km deep · 67 km away
48. 2.885 km ESE of Adak, AlaskaFri, Oct 15, 11:13 AM HADT · 1805 days ago · 52 km deep · 14 km away
49. 3.050 km ESE of Adak, AlaskaWed, Oct 20, 8:10 AM HADT · 1800 days ago · 3 km deep · 37 km away · felt by 1
50. 3.693 km ESE of Adak, AlaskaWed, Oct 20, 8:49 AM HADT · 1800 days ago · 24 km deep · 19 km away
51. 2.469 km WNW of Atka, AlaskaFri, Oct 22, 7:00 PM HADT · 1797 days ago · 120 km deep · 65 km away
52. 2.081 km ENE of Adak, AlaskaSat, Oct 23, 5:38 PM HADT · 1796 days ago · 115 km deep · 26 km away
53. 2.133 km ESE of Adak, AlaskaSun, Oct 24, 3:51 PM HADT · 1795 days ago · 62 km deep · 56 km away
54. 3.563 km ESE of Adak, AlaskaMon, Oct 25, 10:24 AM HADT · 1795 days ago · 35 km deep · 39 km away
55. 1.889 km SW of Atka, AlaskaMon, Oct 25, 12:09 PM HADT · 1795 days ago · 26 km deep · 40 km away
56. 1.658 km SE of Adak, AlaskaMon, Oct 25, 6:18 PM HADT · 1794 days ago · 25 km deep · 51 km away
57. 2.929 km SSW of Atka, AlaskaMon, Oct 25, 7:25 PM HADT · 1794 days ago · 10 km deep · 78 km away
58. 1.935 km E of Adak, AlaskaMon, Oct 25, 11:39 PM HADT · 1794 days ago · 125 km deep · 48 km away
59. 1.833 km SSW of Atka, AlaskaTue, Oct 26, 12:08 AM HADT · 1794 days ago · 71 km deep · 69 km away
60. 1.843 km SSE of Adak, AlaskaTue, Oct 26, 9:22 AM HADT · 1794 days ago · 34 km deep · 71 km away

The first 60 of 121.

Before

1. 1.557 km ESE of Adak, AlaskaMon, Sep 20, 12:46 AM HADT · 1830 days ago · 44 km deep · 36 km away
2. 1.541 km SSE of Adak, AlaskaMon, Sep 20, 12:42 AM HADT · 1830 days ago · 36 km deep · 72 km away
3. 1.777 km SE of Adak, AlaskaSun, Sep 19, 9:09 PM HADT · 1830 days ago · 23 km deep · 45 km away
4. 3.224 km SSW of Adak, AlaskaFri, Sep 17, 12:40 PM HADT · 1833 days ago · 77 km deep · 91 km away
5. 2.543 km NW of Atka, AlaskaFri, Sep 17, 10:43 AM HADT · 1833 days ago · 216 km deep · 87 km away
6. 3.0135 km SSW of Atka, AlaskaFri, Sep 17, 8:34 AM HADT · 1833 days ago · 14 km deep · 93 km away
7. 1.947 km SSW of Atka, AlaskaFri, Sep 17, 2:54 AM HADT · 1833 days ago · 53 km deep · 73 km away
8. 2.687 km S of Atka, AlaskaFri, Sep 17, 1:22 AM HADT · 1833 days ago · 35 km deep · 97 km away
9. 1.660 km SE of Adak, AlaskaTue, Sep 14, 6:47 PM HADT · 1835 days ago · 13 km deep · 66 km away
10. 1.756 km SE of Adak, AlaskaTue, Sep 14, 6:24 PM HADT · 1835 days ago · 13 km deep · 65 km away
11. 2.957 km SSE of Adak, AlaskaSun, Sep 12, 5:44 AM HADT · 1838 days ago · 35 km deep · 68 km away
12. 1.950 km SSW of Atka, AlaskaFri, Sep 10, 2:59 PM HADT · 1839 days ago · 61 km deep · 70 km away
13. 3.131 km S of Atka, AlaskaFri, Sep 10, 9:35 AM HADT · 1840 days ago · 4 km deep · 79 km away
14. 3.147 km S of Atka, AlaskaFri, Sep 10, 8:42 AM HADT · 1840 days ago · 27 km deep · 80 km away
15. 3.7101 km ESE of Adak, AlaskaFri, Sep 10, 5:00 AM HADT · 1840 days ago · 35 km deep · 43 km away
16. 3.689 km SW of Atka, AlaskaThu, Sep 9, 2:44 PM HADT · 1840 days ago · 35 km deep · 36 km away
17. 1.651 km E of Adak, AlaskaWed, Sep 8, 9:32 PM HADT · 1841 days ago · 93 km deep · 36 km away
18. 1.972 km SSW of Atka, AlaskaWed, Sep 8, 7:43 PM HADT · 1841 days ago · 22 km deep · 55 km away
19. 1.739 km NE of Adak, AlaskaWed, Sep 8, 3:11 AM HADT · 1842 days ago · 132 km deep · 63 km away
20. 2.278 km ENE of Adak, AlaskaWed, Sep 8, 2:59 AM HADT · 1842 days ago · 236 km deep · 34 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak021c341pm8. Read Thu, Sep 24, 2026, 10:10 AM UTC.