M1.5 earthquake 126 km W of Adak, Alaska

Magnitude

1.5 (ml), micro

Local time

Thu, Dec 23, 2021, 4:24 PM HAST

UTC

2021-12-24 02:24:22 UTC

Depth

10.4 km (6.5 mi), shallow

Epicenter

51.908° N, 178.473° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.3 km horizontally, 12.8 km in depth

Magnitude uncertainty

±0.36

Depth from

Operator assigned

Station coverage gap

206°, poorly surrounded by stations

Stations used

7

After

1. 1.8134 km WSW of Adak, AlaskaSat, Dec 25, 3:45 AM HAST · 1734 days ago · 24 km deep · 62 km away
2. 1.550 km SW of Adak, AlaskaSat, Dec 25, 4:13 AM HAST · 1734 days ago · 16 km deep · 94 km away
3. 1.9101 km SW of Adak, AlaskaSat, Dec 25, 7:06 PM HAST · 1733 days ago · 29 km deep · 80 km away
4. 3.1216 km W of Adak, AlaskaSun, Dec 26, 1:30 AM HAST · 1733 days ago · 124 km deep · 91 km away
5. 1.9127 km WSW of Adak, AlaskaMon, Dec 27, 10:28 AM HAST · 1732 days ago · 25 km deep · 54 km away
6. 2.074 km WSW of Adak, AlaskaMon, Dec 27, 10:43 AM HAST · 1732 days ago · 58 km deep · 76 km away
7. 3.1155 km WSW of Adak, AlaskaWed, Dec 29, 1:28 AM HAST · 1730 days ago · 34 km deep · 73 km away
8. 1.9141 km SW of Adak, AlaskaWed, Dec 29, 3:55 AM HAST · 1730 days ago · 20 km deep · 93 km away
9. 2.190 km WSW of Adak, AlaskaFri, Dec 31, 1:10 PM HAST · 1727 days ago · 39 km deep · 68 km away
10. 2.8123 km SW of Adak, AlaskaSat, Jan 1, 8:26 AM HAST · 1727 days ago · 35 km deep · 94 km away
11. 2.9210 km W of Adak, AlaskaSat, Jan 1, 5:42 PM HAST · 1726 days ago · 10 km deep · 87 km away
12. 3.5134 km SW of Adak, AlaskaSun, Jan 2, 7:54 PM HAST · 1725 days ago · 33 km deep · 79 km away
13. 1.963 km SW of Adak, AlaskaSun, Jan 2, 11:26 PM HAST · 1725 days ago · 46 km deep · 90 km away
14. 3.7121 km WSW of Adak, AlaskaTue, Jan 4, 5:23 PM HAST · 1723 days ago · 33 km deep · 52 km away
15. 1.981 km WSW of Adak, AlaskaWed, Jan 5, 4:05 AM HAST · 1723 days ago · 27 km deep · 67 km away
16. 1.980 km WSW of Adak, AlaskaThu, Jan 6, 9:13 PM HAST · 1721 days ago · 43 km deep · 74 km away
17. 1.8128 km WSW of Adak, AlaskaFri, Jan 7, 2:10 PM HAST · 1720 days ago · 10 km deep · 42 km away
18. 1.8130 km WSW of Adak, AlaskaSat, Jan 8, 12:49 AM HAST · 1720 days ago · 32 km deep · 72 km away
19. 3.0217 km W of Adak, AlaskaSun, Jan 9, 10:12 AM HAST · 1719 days ago · 87 km deep · 91 km away
20. 3.498 km SW of Adak, AlaskaSun, Jan 9, 10:22 AM HAST · 1719 days ago · 35 km deep · 80 km away
21. 5.1Andreanof Islands, Aleutian Islands, AlaskaWed, Jan 12, 7:47 PM HAST · 1715 days ago · 47 km deep · 83 km away · felt by 1
22. 3.4191 km WSW of Adak, AlaskaWed, Jan 12, 7:51 PM HAST · 1715 days ago · 33 km deep · 95 km away
23. 3.1192 km WSW of Adak, AlaskaWed, Jan 12, 7:58 PM HAST · 1715 days ago · 30 km deep · 100 km away
24. 2.3191 km WSW of Adak, AlaskaWed, Jan 12, 7:59 PM HAST · 1715 days ago · 22 km deep · 98 km away
25. 2.2192 km WSW of Adak, AlaskaWed, Jan 12, 8:08 PM HAST · 1715 days ago · 23 km deep · 98 km away
26. 2.1192 km WSW of Adak, AlaskaWed, Jan 12, 8:25 PM HAST · 1715 days ago · 22 km deep · 97 km away
27. 2.1194 km WSW of Adak, AlaskaWed, Jan 12, 10:41 PM HAST · 1715 days ago · 16 km deep · 100 km away
28. 2.8Andreanof Isl., Aleutian Islands, AlaskaThu, Jan 13, 6:05 AM HAST · 1715 days ago · 10 km deep · 78 km away
29. 2.080 km SW of Adak, AlaskaThu, Jan 13, 12:53 PM HAST · 1714 days ago · 45 km deep · 81 km away
30. 1.5130 km WSW of Adak, AlaskaThu, Jan 13, 2:39 PM HAST · 1714 days ago · 7 km deep · 28 km away
31. 1.785 km SW of Adak, AlaskaThu, Jan 13, 5:47 PM HAST · 1714 days ago · 25 km deep · 89 km away
32. 1.7181 km W of Adak, AlaskaThu, Jan 13, 7:55 PM HAST · 1714 days ago · 8 km deep · 58 km away
33. 1.582 km SW of Adak, AlaskaFri, Jan 14, 4:31 AM HAST · 1714 days ago · 30 km deep · 87 km away
34. 3.0142 km WSW of Adak, AlaskaFri, Jan 14, 6:21 AM HAST · 1714 days ago · 84 km deep · 37 km away
35. 1.6128 km WSW of Adak, AlaskaFri, Jan 14, 3:29 PM HAST · 1713 days ago · 22 km deep · 54 km away
36. 3.2123 km SW of Adak, AlaskaSat, Jan 15, 5:19 AM HAST · 1713 days ago · 35 km deep · 77 km away
37. 2.075 km WSW of Adak, AlaskaSun, Jan 16, 4:37 AM HAST · 1712 days ago · 72 km deep · 61 km away
38. 1.988 km WSW of Adak, AlaskaSun, Jan 16, 4:39 PM HAST · 1711 days ago · 38 km deep · 65 km away
39. 2.3120 km W of Adak, AlaskaSun, Jan 16, 9:11 PM HAST · 1711 days ago · 106 km deep · 6 km away
40. 2.9131 km SW of Adak, AlaskaMon, Jan 17, 3:28 AM HAST · 1711 days ago · 28 km deep · 82 km away
41. 2.9180 km W of Adak, AlaskaMon, Jan 17, 7:02 AM HAST · 1711 days ago · 18 km deep · 60 km away
42. 1.773 km WSW of Adak, AlaskaMon, Jan 17, 9:24 AM HAST · 1711 days ago · 64 km deep · 78 km away
43. 2.0203 km WSW of Adak, AlaskaMon, Jan 17, 4:17 PM HAST · 1710 days ago · 63 km deep · 86 km away
44. 2.8200 km W of Adak, AlaskaTue, Jan 18, 12:07 PM HAST · 1709 days ago · 94 km deep · 78 km away
45. 2.1187 km WSW of Adak, AlaskaTue, Jan 18, 2:11 PM HAST · 1709 days ago · 20 km deep · 81 km away
46. 1.8189 km WSW of Adak, AlaskaTue, Jan 18, 2:12 PM HAST · 1709 days ago · 19 km deep · 81 km away
47. 2.8210 km W of Adak, AlaskaTue, Jan 18, 5:39 PM HAST · 1709 days ago · 17 km deep · 87 km away
48. 2.3191 km WSW of Adak, AlaskaTue, Jan 18, 10:48 PM HAST · 1709 days ago · 22 km deep · 86 km away
49. 1.9153 km WSW of Adak, AlaskaWed, Jan 19, 2:34 AM HAST · 1709 days ago · 38 km deep · 58 km away
50. 2.5180 km W of Adak, AlaskaWed, Jan 19, 5:02 AM HAST · 1709 days ago · 10 km deep · 59 km away
51. 3.383 km WSW of Adak, AlaskaThu, Jan 20, 7:01 PM HAST · 1707 days ago · 76 km deep · 64 km away
52. 1.777 km WSW of Adak, AlaskaFri, Jan 21, 5:44 PM HAST · 1706 days ago · 32 km deep · 72 km away
53. 1.7111 km SW of Adak, AlaskaFri, Jan 21, 9:45 PM HAST · 1706 days ago · 21 km deep · 94 km away
54. 1.684 km SW of Adak, AlaskaSat, Jan 22, 2:12 PM HAST · 1705 days ago · 37 km deep · 82 km away
55. 1.7141 km WSW of Adak, AlaskaSat, Jan 22, 6:04 PM HAST · 1705 days ago · 24 km deep · 73 km away
56. 1.936 km W of Adak, AlaskaSat, Jan 22, 8:19 PM HAST · 1705 days ago · 91 km deep · 90 km away
57. 1.6138 km WSW of Adak, AlaskaSun, Jan 23, 3:17 AM HAST · 1705 days ago · 24 km deep · 56 km away
58. 3.1175 km WSW of Adak, AlaskaSun, Jan 23, 7:34 PM HAST · 1704 days ago · 35 km deep · 85 km away
59. 1.5112 km SW of Adak, AlaskaMon, Jan 24, 2:16 AM HAST · 1704 days ago · 9 km deep · 90 km away
60. 2.1187 km W of Adak, AlaskaMon, Jan 24, 5:34 AM HAST · 1704 days ago · 103 km deep · 62 km away

The first 60 of 127.

Before

1. 1.8102 km SW of Adak, AlaskaThu, Dec 23, 3:17 AM HAST · 1736 days ago · 25 km deep · 94 km away
2. 2.0130 km WSW of Adak, AlaskaThu, Dec 23, 2:51 AM HAST · 1736 days ago · 59 km deep · 52 km away
3. 1.8114 km WSW of Adak, AlaskaWed, Dec 22, 10:37 PM HAST · 1736 days ago · 50 km deep · 56 km away
4. 1.5124 km WSW of Adak, AlaskaWed, Dec 22, 9:38 PM HAST · 1736 days ago · 24 km deep · 53 km away
5. 1.9128 km WSW of Adak, AlaskaWed, Dec 22, 5:26 PM HAST · 1736 days ago · 13 km deep · 33 km away
6. 2.6105 km W of Adak, AlaskaWed, Dec 22, 3:59 PM HAST · 1736 days ago · 90 km deep · 30 km away
7. 1.777 km WSW of Adak, AlaskaTue, Dec 21, 3:43 PM HAST · 1737 days ago · 26 km deep · 73 km away
8. 2.3202 km WSW of Adak, AlaskaTue, Dec 21, 12:34 PM HAST · 1737 days ago · 14 km deep · 94 km away
9. 2.8196 km W of Adak, AlaskaMon, Dec 20, 12:25 PM HAST · 1738 days ago · 121 km deep · 70 km away
10. 1.679 km WSW of Adak, AlaskaMon, Dec 20, 10:34 AM HAST · 1739 days ago · 56 km deep · 64 km away
11. 1.8167 km W of Adak, AlaskaMon, Dec 20, 6:43 AM HAST · 1739 days ago · 11 km deep · 42 km away
12. 3.4132 km WSW of Adak, AlaskaMon, Dec 20, 4:32 AM HAST · 1739 days ago · 74 km deep · 44 km away
13. 1.7134 km WSW of Adak, AlaskaMon, Dec 20, 3:22 AM HAST · 1739 days ago · 28 km deep · 53 km away
14. 2.9108 km WSW of Adak, AlaskaFri, Dec 17, 8:02 PM HAST · 1741 days ago · 48 km deep · 63 km away
15. 1.978 km WSW of Adak, AlaskaWed, Dec 15, 11:48 PM HAST · 1743 days ago · 73 km deep · 60 km away
16. 1.769 km SW of Adak, AlaskaWed, Dec 15, 4:15 PM HAST · 1743 days ago · 43 km deep · 85 km away
17. 1.8146 km WSW of Adak, AlaskaMon, Dec 13, 10:05 PM HAST · 1745 days ago · 24 km deep · 60 km away
18. 1.9133 km WSW of Adak, AlaskaMon, Dec 13, 9:00 PM HAST · 1745 days ago · 13 km deep · 77 km away
19. 4.089 km SW of Adak, AlaskaMon, Dec 13, 3:15 PM HAST · 1745 days ago · 35 km deep · 89 km away
20. 1.674 km SW of Adak, AlaskaSat, Dec 11, 6:47 PM HAST · 1747 days ago · 36 km deep · 90 km away

From the USGS Earthquake Hazards Program and its partner networks, event av91450471. Read Thu, Sep 24, 2026, 9:23 AM UTC.