M1.6 earthquake 56 km SE of Adak, Alaska

Magnitude

1.6 (ml), micro

Local time

Mon, Dec 20, 2021, 3:55 AM HAST

UTC

2021-12-20 13:55:23 UTC

Depth

24.5 km (15.2 mi), shallow

Epicenter

51.488° N, 176.104° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Stations used

18

After

1. 1.761 km SE of Adak, AlaskaMon, Dec 20, 7:27 AM HAST · 1739 days ago · 26 km deep · 8 km away
2. 1.953 km S of Adak, AlaskaMon, Dec 20, 8:31 PM HAST · 1738 days ago · 23 km deep · 32 km away
3. 1.951 km S of Adak, AlaskaTue, Dec 21, 10:51 AM HAST · 1738 days ago · 25 km deep · 29 km away
4. 2.746 km S of Adak, AlaskaTue, Dec 21, 9:43 PM HAST · 1737 days ago · 52 km deep · 28 km away
5. 3.056 km NE of Adak, AlaskaWed, Dec 22, 9:26 AM HAST · 1737 days ago · 158 km deep · 83 km away
6. 1.646 km SSE of Adak, AlaskaWed, Dec 22, 3:48 PM HAST · 1737 days ago · 31 km deep · 16 km away
7. 2.116 km NNE of Adak, AlaskaWed, Dec 22, 11:27 PM HAST · 1736 days ago · 110 km deep · 65 km away
8. 3.391 km SE of Adak, AlaskaThu, Dec 23, 5:12 PM HAST · 1735 days ago · 35 km deep · 39 km away
9. 2.787 km SE of Adak, AlaskaThu, Dec 23, 9:53 PM HAST · 1735 days ago · 23 km deep · 32 km away
10. 2.020 km SSE of Adak, AlaskaFri, Dec 24, 2:11 AM HAST · 1735 days ago · 62 km deep · 38 km away
11. 2.156 km SE of Adak, AlaskaFri, Dec 24, 10:59 AM HAST · 1735 days ago · 26 km deep · 2 km away
12. 1.550 km SW of Adak, AlaskaSat, Dec 25, 4:13 AM HAST · 1734 days ago · 16 km deep · 77 km away
13. 2.182 km E of Adak, AlaskaSat, Dec 25, 5:10 AM HAST · 1734 days ago · 67 km deep · 61 km away
14. 2.780 km SE of Adak, AlaskaSat, Dec 25, 7:57 PM HAST · 1733 days ago · 35 km deep · 24 km away
15. 1.753 km SE of Adak, AlaskaSun, Dec 26, 11:16 AM HAST · 1733 days ago · 28 km deep · 7 km away
16. 1.852 km SW of Adak, AlaskaTue, Dec 28, 12:51 AM HAST · 1731 days ago · 35 km deep · 70 km away
17. 2.022 km ENE of Adak, AlaskaWed, Dec 29, 7:26 AM HAST · 1730 days ago · 142 km deep · 58 km away
18. 3.461 km SSE of Adak, AlaskaWed, Dec 29, 4:01 PM HAST · 1730 days ago · 35 km deep · 16 km away
19. 3.257 km SSE of Adak, AlaskaWed, Dec 29, 4:03 PM HAST · 1730 days ago · 35 km deep · 14 km away
20. 2.777 km SSW of Adak, AlaskaFri, Dec 31, 11:45 AM HAST · 1728 days ago · 35 km deep · 70 km away
21. 1.859 km SSE of Adak, AlaskaSat, Jan 1, 5:14 AM HAST · 1727 days ago · 14 km deep · 8 km away
22. 1.6Andreanof Islands, Aleutian Islands, AlaskaSat, Jan 1, 5:37 AM HAST · 1727 days ago · 25 km deep · 8 km away
23. 2.8125 km SSW of Atka, AlaskaSat, Jan 1, 8:51 AM HAST · 1727 days ago · 6 km deep · 78 km away
24. 2.1122 km SSW of Atka, AlaskaSat, Jan 1, 9:34 AM HAST · 1727 days ago · 13 km deep · 77 km away
25. 2.664 km S of Adak, AlaskaSun, Jan 2, 3:21 AM HAST · 1726 days ago · 35 km deep · 50 km away
26. 2.16 km ENE of Adak, AlaskaSun, Jan 2, 7:46 PM HAST · 1725 days ago · 7 km deep · 56 km away
27. 2.058 km SSE of Adak, AlaskaSun, Jan 2, 8:48 PM HAST · 1725 days ago · 20 km deep · 16 km away
28. 1.963 km SW of Adak, AlaskaSun, Jan 2, 11:26 PM HAST · 1725 days ago · 46 km deep · 86 km away
29. 2.799 km SW of Atka, AlaskaMon, Jan 3, 11:25 PM HAST · 1724 days ago · 35 km deep · 65 km away
30. 3.812 km SE of Adak, AlaskaTue, Jan 4, 5:43 AM HAST · 1724 days ago · 3 km deep · 44 km away
31. 2.89 km SE of Adak, AlaskaTue, Jan 4, 5:46 AM HAST · 1724 days ago · 13 km deep · 47 km away
32. 1.83 km ENE of Adak, AlaskaTue, Jan 4, 10:27 AM HAST · 1724 days ago · 6 km deep · 56 km away
33. 3.2Andreanof Islands, Aleutian Islands, AlaskaWed, Jan 5, 9:53 AM HAST · 1723 days ago · 35 km deep · 66 km away
34. 1.55 km ENE of Adak, AlaskaWed, Jan 5, 12:58 PM HAST · 1723 days ago · 5 km deep · 55 km away
35. 1.961 km SSW of Adak, AlaskaWed, Jan 5, 4:38 PM HAST · 1722 days ago · 47 km deep · 70 km away
36. 2.636 km SE of Adak, AlaskaThu, Jan 6, 4:26 AM HAST · 1722 days ago · 66 km deep · 22 km away
37. 2.0Andreanof Islands, Aleutian Islands, AlaskaThu, Jan 6, 8:09 AM HAST · 1722 days ago · 7 km deep · 57 km away
38. 2.769 km SSW of Adak, AlaskaFri, Jan 7, 5:59 PM HAST · 1720 days ago · 35 km deep · 66 km away
39. 1.5Andreanof Islands, Aleutian Islands, AlaskaFri, Jan 7, 7:19 PM HAST · 1720 days ago · 31 km deep · 18 km away
40. 3.175 km SW of Atka, AlaskaFri, Jan 7, 9:31 PM HAST · 1720 days ago · 35 km deep · 85 km away
41. 3.86 km ESE of Adak, AlaskaSat, Jan 8, 1:39 AM HAST · 1720 days ago · 10 km deep · 51 km away
42. 2.65 km E of Adak, AlaskaSat, Jan 8, 2:54 AM HAST · 1720 days ago · 7 km deep · 53 km away
43. 2.57 km ESE of Adak, AlaskaSat, Jan 8, 2:54 AM HAST · 1720 days ago · 9 km deep · 50 km away
44. 2.76 km ENE of Adak, AlaskaSat, Jan 8, 5:37 AM HAST · 1720 days ago · 10 km deep · 55 km away
45. 1.96 km ENE of Adak, AlaskaSat, Jan 8, 6:11 AM HAST · 1720 days ago · 6 km deep · 55 km away
46. 1.65 km ENE of Adak, AlaskaSat, Jan 8, 7:15 AM HAST · 1720 days ago · 7 km deep · 55 km away
47. 1.63 km E of Adak, AlaskaSat, Jan 8, 9:43 AM HAST · 1720 days ago · 4 km deep · 55 km away
48. 1.96 km ENE of Adak, AlaskaSat, Jan 8, 10:05 AM HAST · 1720 days ago · 3 km deep · 55 km away
49. 3.278 km NE of Adak, AlaskaSat, Jan 8, 12:44 PM HAST · 1720 days ago · 183 km deep · 91 km away
50. 1.963 km SW of Atka, AlaskaSat, Jan 8, 4:10 PM HAST · 1719 days ago · 26 km deep · 94 km away
51. 1.96 km ENE of Adak, AlaskaSat, Jan 8, 7:20 PM HAST · 1719 days ago · 6 km deep · 55 km away
52. 3.049 km SSE of Adak, AlaskaSat, Jan 8, 9:12 PM HAST · 1719 days ago · 35 km deep · 15 km away
53. 2.66 km NE of Adak, AlaskaSun, Jan 9, 1:06 AM HAST · 1719 days ago · 3 km deep · 57 km away
54. 1.84 km ENE of Adak, AlaskaSun, Jan 9, 5:09 AM HAST · 1719 days ago · 11 km deep · 56 km away
55. 1.61 km E of Adak, AlaskaSun, Jan 9, 6:33 PM HAST · 1718 days ago · 5 km deep · 56 km away
56. 1.946 km S of Adak, AlaskaMon, Jan 10, 4:01 PM HAST · 1718 days ago · 26 km deep · 40 km away
57. 2.824 km SE of Adak, AlaskaTue, Jan 11, 4:22 PM HAST · 1716 days ago · 69 km deep · 32 km away
58. 2.752 km SE of Adak, AlaskaTue, Jan 11, 4:24 PM HAST · 1716 days ago · 36 km deep · 8 km away
59. 1.98 km NE of Adak, AlaskaWed, Jan 12, 4:53 AM HAST · 1716 days ago · 7 km deep · 58 km away
60. 3.024 km SSE of Adak, AlaskaWed, Jan 12, 7:35 PM HAST · 1715 days ago · 73 km deep · 34 km away

The first 60 of 170.

Before

1. 1.862 km SE of Adak, AlaskaMon, Dec 20, 2:54 AM HAST · 1739 days ago · 24 km deep · 9 km away
2. 1.875 km ESE of Adak, AlaskaSun, Dec 19, 11:02 PM HAST · 1739 days ago · 36 km deep · 29 km away
3. 2.943 km S of Adak, AlaskaFri, Dec 17, 3:52 PM HAST · 1742 days ago · 35 km deep · 38 km away
4. 4.029 km SSW of Adak, AlaskaThu, Dec 16, 9:48 AM HAST · 1743 days ago · 71 km deep · 53 km away
5. 1.855 km SSE of Adak, AlaskaThu, Dec 16, 4:40 AM HAST · 1743 days ago · 26 km deep · 22 km away
6. 1.764 km SSE of Adak, AlaskaThu, Dec 16, 3:46 AM HAST · 1743 days ago · 23 km deep · 17 km away
7. 1.769 km SW of Adak, AlaskaWed, Dec 15, 4:15 PM HAST · 1743 days ago · 43 km deep · 92 km away
8. 1.865 km SSE of Adak, AlaskaMon, Dec 13, 8:49 PM HAST · 1745 days ago · 26 km deep · 13 km away
9. 2.144 km SSE of Adak, AlaskaMon, Dec 13, 5:30 PM HAST · 1745 days ago · 33 km deep · 18 km away
10. 1.839 km SSE of Adak, AlaskaMon, Dec 13, 11:01 AM HAST · 1746 days ago · 48 km deep · 23 km away
11. 2.676 km SSW of Adak, AlaskaMon, Dec 13, 7:30 AM HAST · 1746 days ago · 35 km deep · 77 km away
12. 2.339 km E of Adak, AlaskaSun, Dec 12, 5:23 PM HAST · 1746 days ago · 127 km deep · 36 km away
13. 2.570 km ESE of Adak, AlaskaSun, Dec 12, 11:24 AM HAST · 1747 days ago · 35 km deep · 23 km away
14. 1.674 km SW of Adak, AlaskaSat, Dec 11, 6:47 PM HAST · 1747 days ago · 36 km deep · 92 km away
15. 1.668 km SW of Adak, AlaskaSat, Dec 11, 2:45 PM HAST · 1748 days ago · 36 km deep · 79 km away
16. 2.096 km SW of Atka, AlaskaSat, Dec 11, 10:35 AM HAST · 1748 days ago · 25 km deep · 62 km away
17. 1.634 km SW of Adak, AlaskaSat, Dec 11, 7:17 AM HAST · 1748 days ago · 69 km deep · 58 km away
18. 2.792 km SE of Adak, AlaskaSat, Dec 11, 6:46 AM HAST · 1748 days ago · 35 km deep · 41 km away
19. 1.6Andreanof Islands, Aleutian Islands, AlaskaSat, Dec 11, 1:20 AM HAST · 1748 days ago · 19 km deep · 29 km away
20. 1.640 km SE of Adak, AlaskaFri, Dec 10, 11:15 PM HAST · 1748 days ago · 31 km deep · 17 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak021g9obbud. Read Thu, Sep 24, 2026, 1:36 PM UTC.