M1.8 earthquake 256 km W of Adak, Alaska

Magnitude

1.8 (ml), micro

Local time

Sun, Oct 31, 2021, 3:44 PM GMT+12

UTC

2021-10-31 03:44:58 UTC

Depth

91.5 km (56.9 mi), intermediate-depth

Epicenter

51.816° N, 179.644° E

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Stations used

19

After

1. 1.7Rat Islands, Aleutian Islands, AlaskaSun, Oct 31, 8:24 PM GMT+12 · 1792 days ago · 92 km deep · 86 km away
2. 1.8278 km W of Adak, AlaskaSun, Oct 31, 11:45 PM GMT+12 · 1792 days ago · 79 km deep · 22 km away
3. 3.1246 km W of Adak, AlaskaMon, Nov 1, 9:45 AM GMT+12 · 1792 days ago · 164 km deep · 14 km away
4. 2.9226 km W of Adak, AlaskaSun, Oct 31, 11:28 PM HADT · 1791 days ago · 102 km deep · 31 km away
5. 2.9238 km WSW of Adak, AlaskaTue, Nov 2, 3:15 AM GMT-12 · 1790 days ago · 27 km deep · 75 km away
6. 3.0Rat Islands, Aleutian Islands, AlaskaThu, Nov 4, 2:08 AM GMT+12 · 1789 days ago · 35 km deep · 75 km away
7. 2.8253 km WSW of Adak, AlaskaThu, Nov 4, 5:33 AM GMT+12 · 1789 days ago · 70 km deep · 40 km away
8. 1.7287 km WSW of Adak, AlaskaThu, Nov 4, 4:20 PM GMT+12 · 1788 days ago · 33 km deep · 50 km away
9. 2.7299 km W of Adak, AlaskaSat, Nov 6, 12:05 AM GMT+12 · 1787 days ago · 80 km deep · 46 km away
10. 1.9253 km W of Adak, AlaskaSat, Nov 6, 12:12 AM GMT+12 · 1787 days ago · 74 km deep · 20 km away
11. 2.1Rat Islands, Aleutian Islands, AlaskaSat, Nov 6, 3:30 PM GMT+12 · 1786 days ago · 97 km deep · 75 km away
12. 1.6249 km W of Adak, AlaskaMon, Nov 8, 7:02 PM GMT+12 · 1784 days ago · -3 km deep · 22 km away
13. 2.5241 km WSW of Adak, AlaskaMon, Nov 8, 12:39 AM GMT-12 · 1784 days ago · 33 km deep · 66 km away
14. 1.6251 km W of Adak, AlaskaTue, Nov 9, 3:49 AM GMT+12 · 1784 days ago · 1 km deep · 20 km away
15. 2.0181 km W of Adak, AlaskaMon, Nov 8, 6:55 AM HAST · 1784 days ago · 77 km deep · 76 km away
16. 4.6Rat Islands, Aleutian Islands, AlaskaThu, Nov 11, 6:34 PM GMT+12 · 1781 days ago · 28 km deep · 87 km away
17. 2.8Rat Islands, Aleutian Islands, AlaskaFri, Nov 12, 12:50 PM GMT+12 · 1780 days ago · 41 km deep · 76 km away
18. 1.8Rat Islands, Aleutian Islands, AlaskaSat, Nov 13, 5:58 AM GMT+12 · 1780 days ago · 7 km deep · 83 km away
19. 1.7Rat Islands, Aleutian Islands, AlaskaSat, Nov 13, 6:42 AM GMT+12 · 1780 days ago · 2 km deep · 87 km away
20. 1.9281 km WSW of Adak, AlaskaSat, Nov 13, 2:28 PM GMT+12 · 1779 days ago · 46 km deep · 53 km away
21. 2.7200 km W of Adak, AlaskaSat, Nov 13, 3:08 PM HAST · 1778 days ago · 89 km deep · 59 km away
22. 2.2Rat Islands, Aleutian Islands, AlaskaSun, Nov 14, 7:18 PM GMT+12 · 1778 days ago · 69 km deep · 49 km away
23. 3.4216 km WSW of Adak, AlaskaMon, Nov 15, 5:12 PM HAST · 1776 days ago · 33 km deep · 97 km away
24. 2.1226 km WSW of Adak, AlaskaMon, Nov 15, 5:15 PM HAST · 1776 days ago · 13 km deep · 99 km away
25. 2.6256 km WSW of Adak, AlaskaThu, Nov 18, 8:27 PM GMT+12 · 1774 days ago · 31 km deep · 63 km away
26. 2.8Rat Islands, Aleutian Islands, AlaskaThu, Nov 18, 9:34 PM GMT+12 · 1774 days ago · 23 km deep · 95 km away
27. 2.5Rat Islands, Aleutian Islands, AlaskaFri, Nov 19, 12:36 PM GMT+12 · 1773 days ago · 42 km deep · 75 km away
28. 2.1Rat Islands, Aleutian Islands, AlaskaFri, Nov 19, 12:36 PM GMT+12 · 1773 days ago · 41 km deep · 70 km away
29. 1.8211 km W of Adak, AlaskaFri, Nov 19, 1:39 AM HAST · 1773 days ago · 72 km deep · 51 km away
30. 2.2204 km WSW of Adak, AlaskaFri, Nov 19, 11:31 AM HAST · 1773 days ago · 44 km deep · 86 km away
31. 2.6213 km WSW of Adak, AlaskaSat, Nov 20, 3:13 PM HAST · 1771 days ago · 10 km deep · 98 km away
32. 2.2212 km WSW of Adak, AlaskaSun, Nov 21, 7:45 PM HAST · 1770 days ago · 69 km deep · 61 km away
33. 1.9283 km W of Adak, AlaskaTue, Nov 23, 5:40 AM GMT+12 · 1770 days ago · 62 km deep · 34 km away
34. 3.2Rat Islands, Aleutian Islands, AlaskaWed, Nov 24, 9:26 AM GMT+12 · 1769 days ago · 35 km deep · 75 km away
35. 2.3216 km WSW of Adak, AlaskaTue, Nov 23, 8:26 PM HAST · 1768 days ago · 13 km deep · 94 km away
36. 2.8221 km WSW of Adak, AlaskaWed, Nov 24, 5:39 AM HAST · 1768 days ago · 26 km deep · 97 km away
37. 2.8Rat Islands, Aleutian Islands, AlaskaThu, Nov 25, 4:02 AM GMT+12 · 1768 days ago · 126 km deep · 83 km away
38. 1.8Rat Islands, Aleutian Islands, AlaskaThu, Nov 25, 5:34 PM GMT+12 · 1767 days ago · 43 km deep · 66 km away
39. 1.7263 km W of Adak, AlaskaThu, Nov 25, 7:49 PM GMT+12 · 1767 days ago · 19 km deep · 33 km away
40. 1.9245 km WSW of Adak, AlaskaThu, Nov 25, 12:02 AM GMT-12 · 1767 days ago · 26 km deep · 87 km away
41. 2.2253 km W of Adak, AlaskaSat, Nov 27, 3:27 AM GMT+12 · 1766 days ago · 86 km deep · 9 km away
42. 1.9187 km WSW of Adak, AlaskaFri, Nov 26, 7:17 AM HAST · 1766 days ago · 24 km deep · 96 km away
43. 2.1212 km WSW of Adak, AlaskaFri, Nov 26, 9:48 AM HAST · 1766 days ago · 9 km deep · 81 km away
44. 2.9Rat Islands, Aleutian Islands, AlaskaSat, Nov 27, 8:28 PM GMT+12 · 1765 days ago · 21 km deep · 90 km away
45. 2.6188 km W of Adak, AlaskaSun, Nov 28, 4:55 PM HAST · 1763 days ago · 96 km deep · 71 km away
46. 3.1271 km W of Adak, AlaskaMon, Nov 29, 5:55 PM GMT+12 · 1763 days ago · 96 km deep · 18 km away
47. 3.9Rat Islands, Aleutian Islands, AlaskaTue, Nov 30, 6:36 AM GMT+12 · 1763 days ago · 57 km deep · 49 km away
48. 2.3184 km WSW of Adak, AlaskaMon, Nov 29, 6:37 PM HAST · 1762 days ago · 23 km deep · 99 km away
49. 2.1257 km WSW of Adak, AlaskaWed, Dec 1, 11:25 PM GMT+12 · 1761 days ago · 66 km deep · 51 km away
50. 1.8Andreanof Islands, Aleutian Islands, AlaskaWed, Dec 1, 3:06 PM HAST · 1760 days ago · 13 km deep · 69 km away
51. 5.2280 km WSW of Adak, AlaskaThu, Dec 2, 2:26 PM GMT+12 · 1760 days ago · 22 km deep · 94 km away · felt by 2
52. 2.0277 km WSW of Adak, AlaskaThu, Dec 2, 4:19 PM GMT+12 · 1760 days ago · 20 km deep · 86 km away
53. 3.1279 km WSW of Adak, AlaskaThu, Dec 2, 5:07 PM GMT+12 · 1760 days ago · 28 km deep · 95 km away
54. 4.5Rat Islands, Aleutian Islands, AlaskaThu, Dec 2, 6:04 PM GMT+12 · 1760 days ago · 35 km deep · 97 km away
55. 1.9280 km WSW of Adak, AlaskaThu, Dec 2, 8:13 PM GMT+12 · 1760 days ago · 21 km deep · 88 km away
56. 2.0Rat Islands, Aleutian Islands, AlaskaFri, Dec 3, 2:35 AM GMT+12 · 1760 days ago · 15 km deep · 93 km away
57. 3.3Rat Islands, Aleutian Islands, AlaskaSat, Dec 4, 9:14 PM GMT+12 · 1758 days ago · 35 km deep · 76 km away
58. 3.8285 km WSW of Adak, AlaskaSun, Dec 5, 5:58 AM GMT+12 · 1758 days ago · 29 km deep · 98 km away
59. 2.8192 km WSW of Adak, AlaskaSun, Dec 5, 2:03 AM HAST · 1757 days ago · 65 km deep · 78 km away
60. 2.8239 km W of Adak, AlaskaSun, Dec 5, 9:05 PM HAST · 1756 days ago · 176 km deep · 27 km away

The first 60 of 149.

Before

1. 1.9Rat Islands, Aleutian Islands, AlaskaSun, Oct 31, 9:59 AM GMT+12 · 1793 days ago · 95 km deep · 72 km away
2. 2.0211 km W of Adak, AlaskaSat, Oct 30, 10:24 AM HADT · 1793 days ago · 112 km deep · 45 km away
3. 1.9Rat Islands, Aleutian Islands, AlaskaSat, Oct 30, 11:44 PM GMT+12 · 1793 days ago · 37 km deep · 69 km away
4. 1.9Rat Islands, Aleutian Islands, AlaskaSat, Oct 30, 11:44 PM GMT+12 · 1793 days ago · 37 km deep · 69 km away
5. 1.9223 km WSW of Adak, AlaskaFri, Oct 29, 11:24 PM HADT · 1793 days ago · 66 km deep · 49 km away
6. 3.1225 km WSW of Adak, AlaskaThu, Oct 28, 11:57 AM HADT · 1795 days ago · 27 km deep · 64 km away
7. 3.3Rat Islands, Aleutian Islands, AlaskaThu, Oct 28, 9:57 PM GMT+12 · 1795 days ago · 119 km deep · 88 km away
8. 1.6Rat Islands, Aleutian Islands, AlaskaThu, Oct 28, 2:58 PM GMT+12 · 1795 days ago · 35 km deep · 68 km away
9. 3.6204 km WSW of Adak, AlaskaWed, Oct 27, 8:50 AM HADT · 1796 days ago · 35 km deep · 84 km away
10. 1.9Rat Islands, Aleutian Islands, AlaskaThu, Oct 28, 4:49 AM GMT+12 · 1796 days ago · 5 km deep · 94 km away
11. 2.9236 km WSW of Adak, AlaskaWed, Oct 27, 5:50 AM HADT · 1796 days ago · 22 km deep · 96 km away
12. 2.0296 km W of Adak, AlaskaWed, Oct 27, 8:45 PM GMT+12 · 1796 days ago · 61 km deep · 48 km away
13. 1.7Rat Islands, Aleutian Islands, AlaskaWed, Oct 27, 1:06 AM GMT+12 · 1797 days ago · 41 km deep · 71 km away
14. 2.3254 km W of Adak, AlaskaTue, Oct 26, 3:37 PM GMT+12 · 1797 days ago · 162 km deep · 9 km away
15. 2.9Rat Islands, Aleutian Islands, AlaskaMon, Oct 25, 4:43 AM GMT+12 · 1799 days ago · 67 km deep · 69 km away
16. 2.6Rat Islands, Aleutian Islands, AlaskaSun, Oct 24, 4:49 AM GMT+12 · 1800 days ago · 35 km deep · 76 km away
17. 1.7Rat Islands, Aleutian Islands, AlaskaSun, Oct 24, 3:54 AM GMT+12 · 1800 days ago · 39 km deep · 71 km away
18. 2.0Rat Islands, Aleutian Islands, AlaskaSun, Oct 24, 3:25 AM GMT+12 · 1800 days ago · 83 km deep · 65 km away
19. 2.6223 km W of Adak, AlaskaSat, Oct 23, 5:44 AM HADT · 1800 days ago · 84 km deep · 38 km away
20. 1.6Rat Islands, Aleutian Islands, AlaskaSun, Oct 24, 1:00 AM GMT+12 · 1800 days ago · 33 km deep · 71 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak021dytfcym. Read Sun, Sep 27, 2026, 10:15 AM UTC.