M1.8 earthquake 133 km W of Adak, Alaska

Magnitude

1.8 (ml), micro

Local time

Mon, Sep 27, 2021, 9:28 AM HADT

UTC

2021-09-27 18:28:45 UTC

Depth

8.1 km (5.0 mi), shallow

Epicenter

51.692° N, 178.551° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Stations used

28

After

1. 1.7Andreanof Islands, Aleutian Islands, AlaskaMon, Sep 27, 9:28 AM HADT · 1825 days ago · 21 km deep · 9 km away
2. 1.8Andreanof Islands, Aleutian Islands, AlaskaTue, Sep 28, 11:23 PM HADT · 1823 days ago · 15 km deep · 86 km away
3. 2.5114 km W of Adak, AlaskaTue, Sep 28, 11:31 PM HADT · 1823 days ago · 137 km deep · 46 km away
4. 3.1135 km WSW of Adak, AlaskaWed, Sep 29, 12:55 AM HADT · 1823 days ago · 30 km deep · 57 km away
5. 2.1102 km WSW of Adak, AlaskaThu, Sep 30, 2:54 AM HADT · 1822 days ago · 8 km deep · 38 km away
6. 2.3172 km WSW of Adak, AlaskaThu, Sep 30, 10:30 PM HADT · 1821 days ago · 21 km deep · 46 km away
7. 2.8209 km WSW of Adak, AlaskaFri, Oct 1, 12:39 AM HADT · 1821 days ago · 5 km deep · 96 km away
8. 1.8207 km WSW of Adak, AlaskaFri, Oct 1, 11:11 PM HADT · 1820 days ago · 8 km deep · 88 km away
9. 1.7144 km WSW of Adak, AlaskaSat, Oct 2, 8:43 AM HADT · 1820 days ago · 24 km deep · 47 km away
10. 2.7116 km WSW of Adak, AlaskaSat, Oct 2, 10:35 AM HADT · 1820 days ago · 13 km deep · 32 km away
11. 3.9116 km WSW of Adak, AlaskaSat, Oct 2, 4:45 PM HADT · 1819 days ago · 35 km deep · 55 km away
12. 1.5174 km WSW of Adak, AlaskaSat, Oct 2, 10:24 PM HADT · 1819 days ago · 8 km deep · 45 km away
13. 1.9175 km WSW of Adak, AlaskaSun, Oct 3, 2:13 AM HADT · 1819 days ago · 20 km deep · 65 km away
14. 1.8133 km SW of Adak, AlaskaSun, Oct 3, 12:33 PM HADT · 1819 days ago · 25 km deep · 58 km away
15. 3.1140 km SW of Adak, AlaskaTue, Oct 5, 5:42 AM HADT · 1817 days ago · 28 km deep · 68 km away
16. 1.9132 km WSW of Adak, AlaskaTue, Oct 5, 9:08 AM HADT · 1817 days ago · 7 km deep · 9 km away
17. 2.3130 km SW of Adak, AlaskaTue, Oct 5, 12:57 PM HADT · 1817 days ago · 28 km deep · 76 km away
18. 2.5134 km WSW of Adak, AlaskaTue, Oct 5, 6:49 PM HADT · 1816 days ago · 21 km deep · 9 km away
19. 2.5194 km WSW of Adak, AlaskaWed, Oct 6, 5:45 PM HADT · 1815 days ago · 18 km deep · 77 km away
20. 1.8112 km SW of Adak, AlaskaWed, Oct 6, 8:53 PM HADT · 1815 days ago · 18 km deep · 93 km away
21. 1.6111 km SW of Adak, AlaskaWed, Oct 6, 8:56 PM HADT · 1815 days ago · 26 km deep · 88 km away
22. 1.6106 km SW of Adak, AlaskaWed, Oct 6, 9:54 PM HADT · 1815 days ago · 23 km deep · 70 km away
23. 1.6111 km SW of Adak, AlaskaWed, Oct 6, 10:02 PM HADT · 1815 days ago · 15 km deep · 83 km away
24. 1.8121 km SW of Adak, AlaskaWed, Oct 6, 11:19 PM HADT · 1815 days ago · 21 km deep · 66 km away
25. 2.5105 km WSW of Adak, AlaskaThu, Oct 7, 2:25 AM HADT · 1815 days ago · 48 km deep · 46 km away
26. 2.9132 km WSW of Adak, AlaskaThu, Oct 7, 9:36 PM HADT · 1814 days ago · 10 km deep · 10 km away
27. 1.981 km WSW of Adak, AlaskaThu, Oct 7, 10:05 PM HADT · 1814 days ago · 30 km deep · 63 km away
28. 3.270 km SW of Adak, AlaskaFri, Oct 8, 7:10 AM HADT · 1814 days ago · 49 km deep · 84 km away
29. 1.7163 km WSW of Adak, AlaskaFri, Oct 8, 9:25 AM HADT · 1814 days ago · 16 km deep · 31 km away
30. 1.745 km W of Adak, AlaskaSat, Oct 9, 2:34 AM HADT · 1813 days ago · 92 km deep · 88 km away
31. 2.6128 km WSW of Adak, AlaskaSat, Oct 9, 8:09 PM HADT · 1812 days ago · 19 km deep · 25 km away
32. 2.6154 km WSW of Adak, AlaskaSat, Oct 9, 10:07 PM HADT · 1812 days ago · 21 km deep · 26 km away
33. 1.782 km W of Adak, AlaskaSun, Oct 10, 7:57 AM HADT · 1812 days ago · 10 km deep · 53 km away
34. 2.5182 km WSW of Adak, AlaskaSun, Oct 10, 2:04 PM HADT · 1812 days ago · 29 km deep · 58 km away
35. 3.0116 km WSW of Adak, AlaskaSun, Oct 10, 4:26 PM HADT · 1811 days ago · 34 km deep · 39 km away
36. 1.769 km WSW of Adak, AlaskaSun, Oct 10, 11:08 PM HADT · 1811 days ago · 25 km deep · 70 km away
37. 1.990 km SW of Adak, AlaskaWed, Oct 13, 3:46 AM HADT · 1809 days ago · 16 km deep · 67 km away
38. 3.1216 km W of Adak, AlaskaWed, Oct 13, 11:18 PM HADT · 1808 days ago · 110 km deep · 85 km away
39. 2.7157 km WSW of Adak, AlaskaThu, Oct 14, 3:24 AM HADT · 1808 days ago · 95 km deep · 24 km away
40. 3.0199 km WSW of Adak, AlaskaThu, Oct 14, 3:39 AM HADT · 1808 days ago · 10 km deep · 84 km away
41. 2.9139 km W of Adak, AlaskaFri, Oct 15, 9:55 AM HADT · 1807 days ago · 24 km deep · 23 km away
42. 3.2181 km WSW of Adak, AlaskaSat, Oct 16, 5:11 AM HADT · 1806 days ago · 30 km deep · 53 km away
43. 4.1194 km WSW of Adak, AlaskaSun, Oct 17, 4:08 PM HADT · 1805 days ago · 42 km deep · 76 km away
44. 3.1Andreanof Islands, Aleutian Islands, AlaskaFri, Oct 22, 3:33 AM HADT · 1800 days ago · 146 km deep · 46 km away
45. 1.7117 km WSW of Adak, AlaskaFri, Oct 22, 10:16 PM HADT · 1799 days ago · 29 km deep · 40 km away
46. 1.8123 km WSW of Adak, AlaskaFri, Oct 22, 11:27 PM HADT · 1799 days ago · 17 km deep · 41 km away
47. 2.6223 km W of Adak, AlaskaSat, Oct 23, 5:44 AM HADT · 1799 days ago · 84 km deep · 90 km away
48. 2.072 km W of Adak, AlaskaSun, Oct 24, 7:10 PM HADT · 1797 days ago · 77 km deep · 61 km away
49. 1.9172 km WSW of Adak, AlaskaMon, Oct 25, 4:43 AM HADT · 1797 days ago · 22 km deep · 46 km away
50. 1.8126 km WSW of Adak, AlaskaMon, Oct 25, 5:34 AM HADT · 1797 days ago · 11 km deep · 15 km away
51. 2.0108 km W of Adak, AlaskaMon, Oct 25, 9:12 AM HADT · 1797 days ago · 83 km deep · 30 km away
52. 1.7127 km WSW of Adak, AlaskaMon, Oct 25, 9:19 AM HADT · 1797 days ago · 7 km deep · 18 km away
53. 1.760 km W of Adak, AlaskaTue, Oct 26, 3:02 AM HADT · 1796 days ago · 89 km deep · 74 km away
54. 3.2141 km WSW of Adak, AlaskaWed, Oct 27, 3:58 AM HADT · 1795 days ago · 31 km deep · 51 km away
55. 3.6204 km WSW of Adak, AlaskaWed, Oct 27, 8:50 AM HADT · 1795 days ago · 35 km deep · 75 km away
56. 1.9123 km SW of Adak, AlaskaWed, Oct 27, 11:47 PM HADT · 1794 days ago · 22 km deep · 72 km away
57. 1.7100 km WSW of Adak, AlaskaThu, Oct 28, 12:22 AM HADT · 1794 days ago · 63 km deep · 43 km away
58. 3.6Andreanof Islands, Aleutian Islands, AlaskaThu, Oct 28, 11:23 AM HADT · 1794 days ago · 82 km deep · 13 km away
59. 3.1225 km WSW of Adak, AlaskaThu, Oct 28, 11:57 AM HADT · 1794 days ago · 27 km deep · 93 km away
60. 1.972 km WSW of Adak, AlaskaThu, Oct 28, 2:26 PM HADT · 1794 days ago · 66 km deep · 64 km away

The first 60 of 136.

Before

1. 3.1179 km WSW of Adak, AlaskaSun, Sep 26, 7:20 PM HADT · 1825 days ago · 63 km deep · 51 km away
2. 3.1190 km WSW of Adak, AlaskaSun, Sep 26, 4:56 AM HADT · 1826 days ago · 32 km deep · 68 km away
3. 2.0211 km W of Adak, AlaskaSat, Sep 25, 11:04 PM HADT · 1826 days ago · 104 km deep · 79 km away
4. 1.6221 km WSW of Adak, AlaskaSat, Sep 25, 6:53 PM HADT · 1826 days ago · 50 km deep · 88 km away
5. 2.1110 km SW of Adak, AlaskaSat, Sep 25, 5:21 PM HADT · 1826 days ago · 26 km deep · 75 km away
6. 1.8182 km WSW of Adak, AlaskaFri, Sep 24, 11:38 AM HADT · 1828 days ago · 26 km deep · 68 km away
7. 1.7188 km WSW of Adak, AlaskaFri, Sep 24, 11:28 AM HADT · 1828 days ago · 21 km deep · 72 km away
8. 2.0189 km WSW of Adak, AlaskaFri, Sep 24, 11:15 AM HADT · 1828 days ago · 20 km deep · 77 km away
9. 1.6191 km WSW of Adak, AlaskaFri, Sep 24, 11:13 AM HADT · 1828 days ago · 9 km deep · 81 km away
10. 2.0178 km WSW of Adak, AlaskaFri, Sep 24, 9:00 AM HADT · 1828 days ago · 22 km deep · 67 km away
11. 2.0191 km WSW of Adak, AlaskaFri, Sep 24, 3:54 AM HADT · 1828 days ago · 10 km deep · 84 km away
12. 6.1187 km WSW of Adak, AlaskaFri, Sep 24, 2:52 AM HADT · 1828 days ago · 18 km deep · 75 km away · felt by 7 · tsunami flag
13. 1.692 km WSW of Adak, AlaskaFri, Sep 24, 1:02 AM HADT · 1828 days ago · 13 km deep · 56 km away
14. 1.7Andreanof Islands, Aleutian Islands, AlaskaThu, Sep 23, 10:14 PM HADT · 1828 days ago · 21 km deep · 68 km away
15. 3.4184 km WSW of Adak, AlaskaThu, Sep 23, 10:13 PM HADT · 1828 days ago · 28 km deep · 70 km away
16. 3.2187 km WSW of Adak, AlaskaThu, Sep 23, 10:08 PM HADT · 1828 days ago · 33 km deep · 71 km away
17. 5.5185 km WSW of Adak, AlaskaThu, Sep 23, 10:02 PM HADT · 1828 days ago · 18 km deep · 70 km away
18. 1.5208 km WSW of Adak, AlaskaThu, Sep 23, 3:47 PM HADT · 1829 days ago · 22 km deep · 82 km away
19. 3.1121 km WSW of Adak, AlaskaThu, Sep 23, 3:00 PM HADT · 1829 days ago · 78 km deep · 15 km away
20. 2.0133 km W of Adak, AlaskaThu, Sep 23, 2:46 PM HADT · 1829 days ago · 132 km deep · 36 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak021cetzlvu (also filed as av91041893). Read Sat, Sep 26, 2026, 12:40 PM UTC.