M4.0 earthquake 84 km SE of Atka, Alaska

Magnitude

4.0 (mb), light

Local time

Mon, Dec 13, 2021, 2:05 PM HAST

UTC

2021-12-14 00:05:05 UTC

Depth

35.0 km (21.7 mi), shallow

Epicenter

51.694° N, 173.289° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 7.0 km horizontally, 1.9 km in depth

Magnitude uncertainty

±0.11

Depth from

Operator assigned

Station coverage gap

151°

Stations used

39

After

1. 2.9132 km S of Atka, AlaskaTue, Dec 14, 2:51 PM HAST · 1746 days ago · 10 km deep · 97 km away
2. 2.959 km SSW of Atka, AlaskaWed, Dec 15, 1:37 AM HAST · 1746 days ago · 35 km deep · 95 km away
3. 3.1169 km SE of Atka, AlaskaFri, Dec 17, 12:36 AM HAST · 1744 days ago · 10 km deep · 87 km away
4. 2.250 km ESE of Atka, AlaskaFri, Dec 17, 9:32 PM HAST · 1743 days ago · 62 km deep · 39 km away
5. 3.3122 km ESE of Atka, AlaskaTue, Dec 21, 3:57 AM HAST · 1740 days ago · 34 km deep · 55 km away
6. 2.8155 km SE of Atka, AlaskaWed, Dec 22, 11:49 PM HAST · 1738 days ago · 28 km deep · 71 km away
7. 2.1Andreanof Islands, Aleutian Islands, AlaskaThu, Dec 23, 9:05 PM HAST · 1737 days ago · 17 km deep · 42 km away
8. 2.6103 km SSW of Atka, AlaskaFri, Dec 24, 1:17 PM HAST · 1736 days ago · 10 km deep · 100 km away
9. 3.175 km SE of Atka, AlaskaSat, Dec 25, 5:51 AM HAST · 1736 days ago · 33 km deep · 12 km away
10. 2.961 km S of Atka, AlaskaTue, Dec 28, 2:56 AM HAST · 1733 days ago · 35 km deep · 69 km away
11. 2.191 km ESE of Atka, AlaskaTue, Dec 28, 5:43 AM HAST · 1733 days ago · 13 km deep · 45 km away
12. 1.927 km SW of Atka, AlaskaTue, Dec 28, 2:36 PM HAST · 1732 days ago · 65 km deep · 93 km away
13. 2.2119 km SSE of Atka, AlaskaTue, Dec 28, 7:47 PM HAST · 1732 days ago · 25 km deep · 65 km away
14. 1.959 km SSW of Atka, AlaskaWed, Dec 29, 7:21 PM HAST · 1731 days ago · 11 km deep · 89 km away
15. 2.4103 km S of Atka, AlaskaTue, Jan 4, 6:18 AM HAST · 1726 days ago · 18 km deep · 75 km away
16. 3.078 km S of Atka, AlaskaFri, Jan 7, 5:16 AM HAST · 1723 days ago · 26 km deep · 71 km away
17. 3.247 km S of Atka, AlaskaFri, Jan 7, 10:20 AM HAST · 1722 days ago · 64 km deep · 55 km away
18. 4.1142 km ESE of Atka, AlaskaSun, Jan 9, 8:39 AM HAST · 1720 days ago · 35 km deep · 82 km away
19. 4.275 km NE of Atka, AlaskaTue, Jan 11, 5:24 AM HAST · 1719 days ago · 187 km deep · 99 km away
20. 3.518 km NNE of Atka, AlaskaTue, Jan 11, 6:50 PM HAST · 1718 days ago · 146 km deep · 92 km away
21. 3.417 km WSW of Atka, AlaskaThu, Jan 13, 1:20 AM HAST · 1717 days ago · 178 km deep · 95 km away
22. 1.947 km SSW of Atka, AlaskaThu, Jan 13, 6:56 PM HAST · 1716 days ago · 40 km deep · 84 km away
23. 3.5112 km SE of Atka, AlaskaThu, Jan 13, 7:27 PM HAST · 1716 days ago · 41 km deep · 30 km away
24. 2.8128 km E of Atka, AlaskaThu, Jan 13, 7:38 PM HAST · 1716 days ago · 53 km deep · 97 km away
25. 2.2129 km S of Atka, AlaskaFri, Jan 14, 3:42 AM HAST · 1716 days ago · 5 km deep · 90 km away
26. 1.954 km SSW of Atka, AlaskaSun, Jan 16, 8:49 PM HAST · 1713 days ago · 26 km deep · 94 km away
27. 3.160 km SE of Atka, AlaskaTue, Jan 18, 11:56 PM HAST · 1711 days ago · 6 km deep · 24 km away
28. 2.956 km ESE of Atka, AlaskaWed, Jan 19, 2:44 AM HAST · 1711 days ago · 14 km deep · 32 km away
29. 3.066 km SSE of Atka, AlaskaWed, Jan 19, 4:15 AM HAST · 1711 days ago · 35 km deep · 27 km away
30. 2.027 km S of Atka, AlaskaFri, Jan 21, 8:31 PM HAST · 1708 days ago · 91 km deep · 73 km away
31. 3.935 km SW of Atka, AlaskaSun, Jan 23, 9:14 PM HAST · 1706 days ago · 68 km deep · 98 km away
32. 1.755 km SSW of Atka, AlaskaMon, Jan 24, 4:19 PM HAST · 1705 days ago · 39 km deep · 87 km away
33. 3.184 km ESE of Atka, AlaskaMon, Jan 24, 6:28 PM HAST · 1705 days ago · 35 km deep · 39 km away
34. 1.753 km S of Atka, AlaskaMon, Jan 24, 11:07 PM HAST · 1705 days ago · 4 km deep · 72 km away
35. 2.962 km ESE of Atka, AlaskaMon, Jan 24, 11:50 PM HAST · 1705 days ago · 35 km deep · 26 km away
36. 3.7Andreanof Islands, Aleutian Islands, AlaskaWed, Jan 26, 9:23 PM HAST · 1703 days ago · 42 km deep · 32 km away
37. 2.923 km SE of Atka, AlaskaFri, Jan 28, 10:10 AM HAST · 1701 days ago · 81 km deep · 60 km away
38. 2.272 km SSW of Atka, AlaskaSat, Jan 29, 2:33 PM HAST · 1700 days ago · 26 km deep · 96 km away
39. 3.2165 km SE of Atka, AlaskaMon, Jan 31, 9:55 PM HAST · 1698 days ago · 10 km deep · 83 km away
40. 2.762 km SSE of Atka, AlaskaWed, Feb 2, 3:54 PM HAST · 1696 days ago · 35 km deep · 34 km away
41. 3.2102 km ESE of Atka, AlaskaThu, Feb 3, 6:03 PM HAST · 1695 days ago · 35 km deep · 42 km away
42. 1.838 km SSW of Atka, AlaskaFri, Feb 4, 1:29 AM HAST · 1695 days ago · 51 km deep · 87 km away
43. 1.647 km SW of Atka, AlaskaFri, Feb 4, 4:38 AM HAST · 1695 days ago · 26 km deep · 96 km away
44. 1.651 km SSW of Atka, AlaskaFri, Feb 4, 9:58 AM HAST · 1694 days ago · 35 km deep · 75 km away
45. 1.935 km S of Atka, AlaskaFri, Feb 4, 12:05 PM HAST · 1694 days ago · 41 km deep · 63 km away
46. 2.157 km SW of Atka, AlaskaSat, Feb 5, 10:21 PM HAST · 1693 days ago · 121 km deep · 96 km away
47. 2.155 km S of Atka, AlaskaSat, Feb 5, 10:48 PM HAST · 1693 days ago · 33 km deep · 64 km away
48. 2.5146 km SSE of Atka, AlaskaSun, Feb 6, 3:04 AM HAST · 1693 days ago · 16 km deep · 87 km away
49. 2.157 km SE of Atka, AlaskaSun, Feb 6, 9:57 PM HAST · 1692 days ago · 34 km deep · 30 km away
50. 1.622 km SE of Atka, AlaskaWed, Feb 9, 10:30 AM HAST · 1689 days ago · 13 km deep · 62 km away
51. 3.0Andreanof Islands, Aleutian Islands, AlaskaWed, Feb 9, 1:13 PM HAST · 1689 days ago · 10 km deep · 65 km away
52. 2.157 km SE of Atka, AlaskaFri, Feb 11, 11:01 AM HAST · 1687 days ago · 24 km deep · 28 km away

Before

1. 3.123 km S of Atka, AlaskaMon, Dec 13, 12:19 PM HAST · 1747 days ago · 178 km deep · 67 km away
2. 2.971 km ESE of Atka, AlaskaSun, Dec 12, 1:28 AM HAST · 1749 days ago · 40 km deep · 27 km away
3. 1.742 km SW of Atka, AlaskaSat, Dec 11, 4:30 PM HAST · 1749 days ago · 54 km deep · 95 km away
4. 2.07 km E of Atka, AlaskaThu, Dec 9, 9:40 PM HAST · 1751 days ago · 6 km deep · 79 km away
5. 4.373 km SSE of Atka, AlaskaThu, Dec 9, 9:12 PM HAST · 1751 days ago · 43 km deep · 46 km away
6. 2.879 km ESE of Atka, AlaskaFri, Dec 3, 2:32 AM HAST · 1758 days ago · 32 km deep · 20 km away
7. 3.515 km NW of Atka, AlaskaWed, Dec 1, 8:48 AM HAST · 1759 days ago · 178 km deep · 99 km away
8. 3.568 km S of Atka, AlaskaMon, Nov 29, 2:13 AM HAST · 1762 days ago · 91 km deep · 59 km away
9. 3.346 km S of Atka, AlaskaSat, Nov 27, 7:39 PM HAST · 1763 days ago · 56 km deep · 60 km away
10. 2.097 km S of Atka, AlaskaFri, Nov 26, 7:32 AM HAST · 1764 days ago · 16 km deep · 59 km away
11. 1.915 km SSW of Atka, AlaskaSun, Nov 21, 8:11 PM HAST · 1769 days ago · 85 km deep · 79 km away
12. 1.824 km S of Atka, AlaskaThu, Nov 18, 8:12 PM HAST · 1772 days ago · 61 km deep · 66 km away
13. 2.8130 km S of Atka, AlaskaThu, Nov 18, 6:56 PM HAST · 1772 days ago · 10 km deep · 93 km away
14. 1.951 km SSW of Atka, AlaskaThu, Nov 18, 1:35 PM HAST · 1772 days ago · 23 km deep · 88 km away
15. 1.952 km SE of Atka, AlaskaThu, Nov 18, 1:56 AM HAST · 1773 days ago · 55 km deep · 35 km away
16. 1.817 km SSW of Atka, AlaskaWed, Nov 17, 4:52 PM HAST · 1773 days ago · 76 km deep · 78 km away
17. 2.847 km S of Atka, AlaskaWed, Nov 17, 1:00 AM HAST · 1774 days ago · 68 km deep · 55 km away
18. 1.951 km ESE of Atka, AlaskaTue, Nov 16, 4:26 AM HAST · 1775 days ago · 63 km deep · 44 km away
19. 2.949 km SW of Atka, AlaskaTue, Nov 16, 2:38 AM HAST · 1775 days ago · 72 km deep · 95 km away
20. 2.142 km ESE of Atka, AlaskaSat, Nov 13, 2:46 PM HAST · 1777 days ago · 15 km deep · 48 km away

From the USGS Earthquake Hazards Program and its partner networks, event us6000gd3z. Read Sat, Sep 26, 2026, 4:43 AM UTC.