M1.6 earthquake 79 km WSW of Adak, Alaska

Magnitude

1.6 (ml), micro

Local time

Mon, Dec 20, 2021, 10:34 AM HAST

UTC

2021-12-20 20:34:38 UTC

Depth

55.5 km (34.5 mi), shallow

Epicenter

51.593° N, 177.692° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Stations used

18

After

1. 1.953 km S of Adak, AlaskaMon, Dec 20, 8:31 PM HAST · 1743 days ago · 23 km deep · 83 km away
2. 1.951 km S of Adak, AlaskaTue, Dec 21, 10:51 AM HAST · 1742 days ago · 25 km deep · 85 km away
3. 1.777 km WSW of Adak, AlaskaTue, Dec 21, 3:43 PM HAST · 1742 days ago · 26 km deep · 9 km away
4. 2.746 km S of Adak, AlaskaTue, Dec 21, 9:43 PM HAST · 1742 days ago · 52 km deep · 83 km away
5. 1.646 km SSE of Adak, AlaskaWed, Dec 22, 3:48 PM HAST · 1741 days ago · 31 km deep · 94 km away
6. 2.6105 km W of Adak, AlaskaWed, Dec 22, 3:59 PM HAST · 1741 days ago · 90 km deep · 35 km away
7. 1.9128 km WSW of Adak, AlaskaWed, Dec 22, 5:26 PM HAST · 1741 days ago · 13 km deep · 52 km away
8. 1.5124 km WSW of Adak, AlaskaWed, Dec 22, 9:38 PM HAST · 1741 days ago · 24 km deep · 45 km away
9. 1.8114 km WSW of Adak, AlaskaWed, Dec 22, 10:37 PM HAST · 1741 days ago · 50 km deep · 35 km away
10. 2.116 km NNE of Adak, AlaskaWed, Dec 22, 11:27 PM HAST · 1741 days ago · 110 km deep · 91 km away
11. 2.0130 km WSW of Adak, AlaskaThu, Dec 23, 2:51 AM HAST · 1741 days ago · 59 km deep · 51 km away
12. 1.8102 km SW of Adak, AlaskaThu, Dec 23, 3:17 AM HAST · 1741 days ago · 25 km deep · 41 km away
13. 1.5126 km W of Adak, AlaskaThu, Dec 23, 4:24 PM HAST · 1740 days ago · 10 km deep · 64 km away
14. 2.020 km SSE of Adak, AlaskaFri, Dec 24, 2:11 AM HAST · 1740 days ago · 62 km deep · 80 km away
15. 1.8134 km WSW of Adak, AlaskaSat, Dec 25, 3:45 AM HAST · 1739 days ago · 24 km deep · 55 km away
16. 1.550 km SW of Adak, AlaskaSat, Dec 25, 4:13 AM HAST · 1739 days ago · 16 km deep · 34 km away
17. 1.9101 km SW of Adak, AlaskaSat, Dec 25, 7:06 PM HAST · 1738 days ago · 29 km deep · 31 km away
18. 1.9127 km WSW of Adak, AlaskaMon, Dec 27, 10:28 AM HAST · 1736 days ago · 25 km deep · 48 km away
19. 2.074 km WSW of Adak, AlaskaMon, Dec 27, 10:43 AM HAST · 1736 days ago · 58 km deep · 12 km away
20. 1.852 km SW of Adak, AlaskaTue, Dec 28, 12:51 AM HAST · 1736 days ago · 35 km deep · 41 km away
21. 3.1155 km WSW of Adak, AlaskaWed, Dec 29, 1:28 AM HAST · 1735 days ago · 34 km deep · 76 km away
22. 1.9141 km SW of Adak, AlaskaWed, Dec 29, 3:55 AM HAST · 1735 days ago · 20 km deep · 68 km away
23. 2.777 km SSW of Adak, AlaskaFri, Dec 31, 11:45 AM HAST · 1732 days ago · 35 km deep · 62 km away
24. 2.190 km WSW of Adak, AlaskaFri, Dec 31, 1:10 PM HAST · 1732 days ago · 39 km deep · 14 km away
25. 2.8123 km SW of Adak, AlaskaSat, Jan 1, 8:26 AM HAST · 1732 days ago · 35 km deep · 55 km away
26. 2.664 km S of Adak, AlaskaSun, Jan 2, 3:21 AM HAST · 1731 days ago · 35 km deep · 72 km away
27. 2.16 km ENE of Adak, AlaskaSun, Jan 2, 7:46 PM HAST · 1730 days ago · 7 km deep · 85 km away
28. 3.5134 km SW of Adak, AlaskaSun, Jan 2, 7:54 PM HAST · 1730 days ago · 33 km deep · 58 km away
29. 1.963 km SW of Adak, AlaskaSun, Jan 2, 11:26 PM HAST · 1730 days ago · 46 km deep · 26 km away
30. 3.812 km SE of Adak, AlaskaTue, Jan 4, 5:43 AM HAST · 1729 days ago · 3 km deep · 84 km away
31. 2.89 km SE of Adak, AlaskaTue, Jan 4, 5:46 AM HAST · 1729 days ago · 13 km deep · 85 km away
32. 1.83 km ENE of Adak, AlaskaTue, Jan 4, 10:27 AM HAST · 1728 days ago · 6 km deep · 83 km away
33. 3.7121 km WSW of Adak, AlaskaTue, Jan 4, 5:23 PM HAST · 1728 days ago · 33 km deep · 42 km away
34. 1.981 km WSW of Adak, AlaskaWed, Jan 5, 4:05 AM HAST · 1728 days ago · 27 km deep · 6 km away
35. 3.2Andreanof Islands, Aleutian Islands, AlaskaWed, Jan 5, 9:53 AM HAST · 1727 days ago · 35 km deep · 48 km away
36. 1.55 km ENE of Adak, AlaskaWed, Jan 5, 12:58 PM HAST · 1727 days ago · 5 km deep · 85 km away
37. 1.961 km SSW of Adak, AlaskaWed, Jan 5, 4:38 PM HAST · 1727 days ago · 47 km deep · 45 km away
38. 2.0Andreanof Islands, Aleutian Islands, AlaskaThu, Jan 6, 8:09 AM HAST · 1727 days ago · 7 km deep · 87 km away
39. 1.980 km WSW of Adak, AlaskaThu, Jan 6, 9:13 PM HAST · 1726 days ago · 43 km deep · 12 km away
40. 1.8128 km WSW of Adak, AlaskaFri, Jan 7, 2:10 PM HAST · 1725 days ago · 10 km deep · 50 km away
41. 2.769 km SSW of Adak, AlaskaFri, Jan 7, 5:59 PM HAST · 1725 days ago · 35 km deep · 59 km away
42. 1.5Andreanof Islands, Aleutian Islands, AlaskaFri, Jan 7, 7:19 PM HAST · 1725 days ago · 31 km deep · 92 km away
43. 1.8130 km WSW of Adak, AlaskaSat, Jan 8, 12:49 AM HAST · 1725 days ago · 32 km deep · 53 km away
44. 3.86 km ESE of Adak, AlaskaSat, Jan 8, 1:39 AM HAST · 1725 days ago · 10 km deep · 85 km away
45. 2.65 km E of Adak, AlaskaSat, Jan 8, 2:54 AM HAST · 1725 days ago · 7 km deep · 85 km away
46. 2.57 km ESE of Adak, AlaskaSat, Jan 8, 2:54 AM HAST · 1725 days ago · 9 km deep · 84 km away
47. 2.76 km ENE of Adak, AlaskaSat, Jan 8, 5:37 AM HAST · 1725 days ago · 10 km deep · 86 km away
48. 1.96 km ENE of Adak, AlaskaSat, Jan 8, 6:11 AM HAST · 1725 days ago · 6 km deep · 86 km away
49. 1.65 km ENE of Adak, AlaskaSat, Jan 8, 7:15 AM HAST · 1725 days ago · 7 km deep · 84 km away
50. 1.63 km E of Adak, AlaskaSat, Jan 8, 9:43 AM HAST · 1725 days ago · 4 km deep · 82 km away
51. 1.96 km ENE of Adak, AlaskaSat, Jan 8, 10:05 AM HAST · 1724 days ago · 3 km deep · 86 km away
52. 1.96 km ENE of Adak, AlaskaSat, Jan 8, 7:20 PM HAST · 1724 days ago · 6 km deep · 86 km away
53. 3.049 km SSE of Adak, AlaskaSat, Jan 8, 9:12 PM HAST · 1724 days ago · 35 km deep · 96 km away
54. 2.66 km NE of Adak, AlaskaSun, Jan 9, 1:06 AM HAST · 1724 days ago · 3 km deep · 85 km away
55. 1.84 km ENE of Adak, AlaskaSun, Jan 9, 5:09 AM HAST · 1724 days ago · 11 km deep · 84 km away
56. 3.498 km SW of Adak, AlaskaSun, Jan 9, 10:22 AM HAST · 1723 days ago · 35 km deep · 29 km away
57. 1.61 km E of Adak, AlaskaSun, Jan 9, 6:33 PM HAST · 1723 days ago · 5 km deep · 81 km away
58. 1.946 km S of Adak, AlaskaMon, Jan 10, 4:01 PM HAST · 1722 days ago · 26 km deep · 72 km away
59. 2.824 km SE of Adak, AlaskaTue, Jan 11, 4:22 PM HAST · 1721 days ago · 69 km deep · 89 km away
60. 1.98 km NE of Adak, AlaskaWed, Jan 12, 4:53 AM HAST · 1721 days ago · 7 km deep · 87 km away

The first 60 of 182.

Before

1. 1.8167 km W of Adak, AlaskaMon, Dec 20, 6:43 AM HAST · 1744 days ago · 11 km deep · 97 km away
2. 3.4132 km WSW of Adak, AlaskaMon, Dec 20, 4:32 AM HAST · 1744 days ago · 74 km deep · 54 km away
3. 1.7134 km WSW of Adak, AlaskaMon, Dec 20, 3:22 AM HAST · 1744 days ago · 28 km deep · 55 km away
4. 3.2101 km SW of Adak, AlaskaSun, Dec 19, 3:07 PM HAST · 1744 days ago · 31 km deep · 50 km away
5. 2.9108 km WSW of Adak, AlaskaFri, Dec 17, 8:02 PM HAST · 1746 days ago · 48 km deep · 30 km away
6. 2.943 km S of Adak, AlaskaFri, Dec 17, 3:52 PM HAST · 1746 days ago · 35 km deep · 73 km away
7. 4.029 km SSW of Adak, AlaskaThu, Dec 16, 9:48 AM HAST · 1748 days ago · 71 km deep · 60 km away
8. 1.855 km SSE of Adak, AlaskaThu, Dec 16, 4:40 AM HAST · 1748 days ago · 26 km deep · 93 km away
9. 1.978 km WSW of Adak, AlaskaWed, Dec 15, 11:48 PM HAST · 1748 days ago · 73 km deep · 6 km away
10. 1.769 km SW of Adak, AlaskaWed, Dec 15, 4:15 PM HAST · 1748 days ago · 43 km deep · 21 km away
11. 1.8146 km WSW of Adak, AlaskaMon, Dec 13, 10:05 PM HAST · 1750 days ago · 24 km deep · 67 km away
12. 1.9133 km WSW of Adak, AlaskaMon, Dec 13, 9:00 PM HAST · 1750 days ago · 13 km deep · 57 km away
13. 2.144 km SSE of Adak, AlaskaMon, Dec 13, 5:30 PM HAST · 1750 days ago · 33 km deep · 92 km away
14. 4.089 km SW of Adak, AlaskaMon, Dec 13, 3:15 PM HAST · 1750 days ago · 35 km deep · 30 km away
15. 1.839 km SSE of Adak, AlaskaMon, Dec 13, 11:01 AM HAST · 1750 days ago · 48 km deep · 88 km away
16. 2.676 km SSW of Adak, AlaskaMon, Dec 13, 7:30 AM HAST · 1751 days ago · 35 km deep · 53 km away
17. 1.674 km SW of Adak, AlaskaSat, Dec 11, 6:47 PM HAST · 1752 days ago · 36 km deep · 26 km away
18. 1.668 km SW of Adak, AlaskaSat, Dec 11, 2:45 PM HAST · 1752 days ago · 36 km deep · 40 km away
19. 1.634 km SW of Adak, AlaskaSat, Dec 11, 7:17 AM HAST · 1753 days ago · 69 km deep · 54 km away
20. 1.592 km SW of Adak, AlaskaSat, Dec 11, 5:27 AM HAST · 1753 days ago · 32 km deep · 34 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak021g9scw7q. Read Tue, Sep 29, 2026, 7:22 AM UTC.