M1.6 earthquake 221 km WSW of Adak, Alaska

Magnitude

1.6 (ml), micro

Local time

Sat, Sep 25, 2021, 6:53 PM HADT

UTC

2021-09-26 03:53:40 UTC

Depth

50.1 km (31.1 mi), shallow

Epicenter

51.432° N, 179.749° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Stations used

13

After

1. 2.0211 km W of Adak, AlaskaSat, Sep 25, 11:04 PM HADT · 1829 days ago · 104 km deep · 40 km away
2. 3.1190 km WSW of Adak, AlaskaSun, Sep 26, 4:56 AM HADT · 1828 days ago · 32 km deep · 48 km away
3. 3.1179 km WSW of Adak, AlaskaSun, Sep 26, 7:20 PM HADT · 1828 days ago · 63 km deep · 44 km away
4. 1.8133 km W of Adak, AlaskaMon, Sep 27, 9:28 AM HADT · 1827 days ago · 8 km deep · 88 km away
5. 1.7Andreanof Islands, Aleutian Islands, AlaskaMon, Sep 27, 9:28 AM HADT · 1827 days ago · 21 km deep · 79 km away
6. 2.6247 km WSW of Adak, AlaskaTue, Sep 28, 3:55 PM GMT-12 · 1826 days ago · 13 km deep · 53 km away
7. 1.8Andreanof Islands, Aleutian Islands, AlaskaTue, Sep 28, 11:23 PM HADT · 1826 days ago · 15 km deep · 33 km away
8. 2.3172 km WSW of Adak, AlaskaThu, Sep 30, 10:30 PM HADT · 1824 days ago · 21 km deep · 52 km away
9. 2.8209 km WSW of Adak, AlaskaFri, Oct 1, 12:39 AM HADT · 1824 days ago · 5 km deep · 63 km away
10. 1.8207 km WSW of Adak, AlaskaFri, Oct 1, 11:11 PM HADT · 1823 days ago · 8 km deep · 51 km away
11. 1.7144 km WSW of Adak, AlaskaSat, Oct 2, 8:43 AM HADT · 1822 days ago · 24 km deep · 89 km away
12. 1.5174 km WSW of Adak, AlaskaSat, Oct 2, 10:24 PM HADT · 1822 days ago · 8 km deep · 48 km away
13. 1.9175 km WSW of Adak, AlaskaSun, Oct 3, 2:13 AM HADT · 1821 days ago · 20 km deep · 68 km away
14. 1.9132 km WSW of Adak, AlaskaTue, Oct 5, 9:08 AM HADT · 1819 days ago · 7 km deep · 88 km away
15. 2.5134 km WSW of Adak, AlaskaTue, Oct 5, 6:49 PM HADT · 1819 days ago · 21 km deep · 86 km away
16. 3.9246 km WSW of Adak, AlaskaWed, Oct 6, 11:56 AM GMT-12 · 1818 days ago · 10 km deep · 47 km away
17. 1.8244 km W of Adak, AlaskaThu, Oct 7, 1:26 PM GMT+12 · 1818 days ago · 61 km deep · 28 km away
18. 2.5194 km WSW of Adak, AlaskaWed, Oct 6, 5:45 PM HADT · 1818 days ago · 18 km deep · 54 km away
19. 2.5Rat Islands, Aleutian Islands, AlaskaThu, Oct 7, 2:56 PM GMT+12 · 1818 days ago · 77 km deep · 100 km away
20. 2.9132 km WSW of Adak, AlaskaThu, Oct 7, 9:36 PM HADT · 1817 days ago · 10 km deep · 88 km away
21. 2.4Rat Islands, Aleutian Islands, AlaskaFri, Oct 8, 7:53 PM GMT+12 · 1817 days ago · 70 km deep · 87 km away
22. 2.8266 km W of Adak, AlaskaSat, Oct 9, 1:32 AM GMT+12 · 1816 days ago · 86 km deep · 59 km away
23. 1.7163 km WSW of Adak, AlaskaFri, Oct 8, 9:25 AM HADT · 1816 days ago · 16 km deep · 58 km away
24. 2.6128 km WSW of Adak, AlaskaSat, Oct 9, 8:09 PM HADT · 1815 days ago · 19 km deep · 95 km away
25. 2.6154 km WSW of Adak, AlaskaSat, Oct 9, 10:07 PM HADT · 1815 days ago · 21 km deep · 67 km away
26. 2.1290 km W of Adak, AlaskaMon, Oct 11, 4:45 AM GMT+12 · 1814 days ago · 28 km deep · 73 km away
27. 2.5182 km WSW of Adak, AlaskaSun, Oct 10, 2:04 PM HADT · 1814 days ago · 29 km deep · 49 km away
28. 1.9244 km WSW of Adak, AlaskaMon, Oct 11, 6:57 PM GMT+12 · 1814 days ago · 48 km deep · 24 km away
29. 3.1216 km W of Adak, AlaskaWed, Oct 13, 11:18 PM HADT · 1811 days ago · 110 km deep · 40 km away
30. 2.7157 km WSW of Adak, AlaskaThu, Oct 14, 3:24 AM HADT · 1810 days ago · 95 km deep · 64 km away
31. 3.0199 km WSW of Adak, AlaskaThu, Oct 14, 3:39 AM HADT · 1810 days ago · 10 km deep · 60 km away
32. 2.8Rat Islands, Aleutian Islands, AlaskaFri, Oct 15, 1:24 AM GMT+12 · 1810 days ago · 73 km deep · 93 km away
33. 4.0Rat Islands, Aleutian Islands, AlaskaFri, Oct 15, 6:31 AM GMT+12 · 1810 days ago · 67 km deep · 100 km away
34. 2.9139 km W of Adak, AlaskaFri, Oct 15, 9:55 AM HADT · 1809 days ago · 24 km deep · 90 km away
35. 3.2181 km WSW of Adak, AlaskaSat, Oct 16, 5:11 AM HADT · 1808 days ago · 30 km deep · 43 km away
36. 4.1194 km WSW of Adak, AlaskaSun, Oct 17, 4:08 PM HADT · 1807 days ago · 42 km deep · 53 km away
37. 3.3231 km WSW of Adak, AlaskaTue, Oct 19, 12:48 PM HADT · 1805 days ago · 6 km deep · 51 km away
38. 5.1Rat Islands, Aleutian Islands, AlaskaSat, Oct 23, 3:10 PM GMT+12 · 1802 days ago · 55 km deep · 99 km away · felt by 1
39. 1.9Rat Islands, Aleutian Islands, AlaskaSat, Oct 23, 3:25 PM GMT+12 · 1802 days ago · 21 km deep · 92 km away
40. 1.9Rat Islands, Aleutian Islands, AlaskaSat, Oct 23, 5:15 PM GMT+12 · 1802 days ago · 39 km deep · 99 km away
41. 1.6Rat Islands, Aleutian Islands, AlaskaSat, Oct 23, 6:21 PM GMT+12 · 1802 days ago · 2 km deep · 86 km away
42. 2.0Rat Islands, Aleutian Islands, AlaskaSat, Oct 23, 8:21 PM GMT+12 · 1802 days ago · 41 km deep · 99 km away
43. 2.9245 km WSW of Adak, AlaskaFri, Oct 22, 10:30 PM GMT-12 · 1801 days ago · 30 km deep · 42 km away
44. 2.6223 km W of Adak, AlaskaSat, Oct 23, 5:44 AM HADT · 1801 days ago · 84 km deep · 27 km away
45. 1.7Rat Islands, Aleutian Islands, AlaskaSun, Oct 24, 3:54 AM GMT+12 · 1801 days ago · 39 km deep · 99 km away
46. 2.9Rat Islands, Aleutian Islands, AlaskaMon, Oct 25, 4:43 AM GMT+12 · 1800 days ago · 67 km deep · 97 km away
47. 1.9172 km WSW of Adak, AlaskaMon, Oct 25, 4:43 AM HADT · 1799 days ago · 22 km deep · 53 km away
48. 1.8126 km WSW of Adak, AlaskaMon, Oct 25, 5:34 AM HADT · 1799 days ago · 11 km deep · 94 km away
49. 1.7127 km WSW of Adak, AlaskaMon, Oct 25, 9:19 AM HADT · 1799 days ago · 7 km deep · 94 km away
50. 2.3254 km W of Adak, AlaskaTue, Oct 26, 3:37 PM GMT+12 · 1799 days ago · 162 km deep · 66 km away
51. 1.7Rat Islands, Aleutian Islands, AlaskaWed, Oct 27, 1:06 AM GMT+12 · 1798 days ago · 41 km deep · 100 km away
52. 2.0296 km W of Adak, AlaskaWed, Oct 27, 8:45 PM GMT+12 · 1798 days ago · 61 km deep · 80 km away
53. 3.2141 km WSW of Adak, AlaskaWed, Oct 27, 3:58 AM HADT · 1797 days ago · 31 km deep · 96 km away
54. 2.9236 km WSW of Adak, AlaskaWed, Oct 27, 5:50 AM HADT · 1797 days ago · 22 km deep · 44 km away
55. 3.6204 km WSW of Adak, AlaskaWed, Oct 27, 8:50 AM HADT · 1797 days ago · 35 km deep · 24 km away
56. 1.6Rat Islands, Aleutian Islands, AlaskaThu, Oct 28, 2:58 PM GMT+12 · 1797 days ago · 35 km deep · 97 km away
57. 3.6Andreanof Islands, Aleutian Islands, AlaskaThu, Oct 28, 11:23 AM HADT · 1796 days ago · 82 km deep · 81 km away
58. 3.1225 km WSW of Adak, AlaskaThu, Oct 28, 11:57 AM HADT · 1796 days ago · 27 km deep · 9 km away
59. 1.9223 km WSW of Adak, AlaskaFri, Oct 29, 11:24 PM HADT · 1795 days ago · 66 km deep · 11 km away
60. 1.9Rat Islands, Aleutian Islands, AlaskaSat, Oct 30, 11:44 PM GMT+12 · 1794 days ago · 37 km deep · 98 km away

The first 60 of 107.

Before

1. 1.8182 km WSW of Adak, AlaskaFri, Sep 24, 11:38 AM HADT · 1830 days ago · 26 km deep · 62 km away
2. 1.7188 km WSW of Adak, AlaskaFri, Sep 24, 11:28 AM HADT · 1830 days ago · 21 km deep · 59 km away
3. 2.0189 km WSW of Adak, AlaskaFri, Sep 24, 11:15 AM HADT · 1830 days ago · 20 km deep · 65 km away
4. 1.6191 km WSW of Adak, AlaskaFri, Sep 24, 11:13 AM HADT · 1830 days ago · 9 km deep · 67 km away
5. 2.0178 km WSW of Adak, AlaskaFri, Sep 24, 9:00 AM HADT · 1830 days ago · 22 km deep · 66 km away
6. 2.0191 km WSW of Adak, AlaskaFri, Sep 24, 3:54 AM HADT · 1830 days ago · 10 km deep · 71 km away
7. 6.1187 km WSW of Adak, AlaskaFri, Sep 24, 2:52 AM HADT · 1830 days ago · 18 km deep · 64 km away · felt by 7 · tsunami flag
8. 1.5Rat Islands, Aleutian Islands, AlaskaFri, Sep 24, 8:16 PM GMT+12 · 1831 days ago · 57 km deep · 35 km away
9. 1.7Andreanof Islands, Aleutian Islands, AlaskaThu, Sep 23, 10:14 PM HADT · 1831 days ago · 21 km deep · 59 km away
10. 3.4184 km WSW of Adak, AlaskaThu, Sep 23, 10:13 PM HADT · 1831 days ago · 28 km deep · 61 km away
11. 3.2187 km WSW of Adak, AlaskaThu, Sep 23, 10:08 PM HADT · 1831 days ago · 33 km deep · 56 km away
12. 5.5185 km WSW of Adak, AlaskaThu, Sep 23, 10:02 PM HADT · 1831 days ago · 18 km deep · 60 km away
13. 1.5208 km WSW of Adak, AlaskaThu, Sep 23, 3:47 PM HADT · 1831 days ago · 22 km deep · 33 km away
14. 3.1121 km WSW of Adak, AlaskaThu, Sep 23, 3:00 PM HADT · 1831 days ago · 78 km deep · 100 km away
15. 1.6165 km WSW of Adak, AlaskaThu, Sep 23, 12:37 AM HADT · 1832 days ago · 24 km deep · 76 km away
16. 1.9222 km WSW of Adak, AlaskaThu, Sep 23, 12:30 AM HADT · 1832 days ago · 12 km deep · 6 km away
17. 1.8129 km WSW of Adak, AlaskaWed, Sep 22, 8:38 PM HADT · 1832 days ago · 11 km deep · 93 km away
18. 1.9129 km W of Adak, AlaskaWed, Sep 22, 5:02 PM HADT · 1832 days ago · 13 km deep · 92 km away
19. 2.7221 km WSW of Adak, AlaskaWed, Sep 22, 2:02 PM HADT · 1832 days ago · 15 km deep · 43 km away
20. 2.5219 km WSW of Adak, AlaskaWed, Sep 22, 12:43 PM HADT · 1832 days ago · 26 km deep · 49 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak021ccxo3n4. Read Mon, Sep 28, 2026, 9:27 PM UTC.