M1.6 earthquake 146 km W of Adak, Alaska

Magnitude

1.6 (ml), micro

Local time

Sun, Sep 12, 2021, 6:49 AM HADT

UTC

2021-09-12 15:49:09 UTC

Depth

15.6 km (9.7 mi), shallow

Epicenter

51.765° N, 178.754° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 2.1 km horizontally, 0.9 km in depth

Magnitude uncertainty

±0.26

Depth from

From location

Station coverage gap

240°, poorly surrounded by stations

Stations used

5

After

1. 2.7133 km W of Adak, AlaskaSun, Sep 12, 11:47 AM HADT · 1838 days ago · 141 km deep · 21 km away
2. 1.782 km W of Adak, AlaskaMon, Sep 13, 3:35 AM HADT · 1837 days ago · 12 km deep · 64 km away
3. 1.8184 km WSW of Adak, AlaskaMon, Sep 13, 5:14 AM HADT · 1837 days ago · 22 km deep · 70 km away
4. 3.692 km SW of Adak, AlaskaMon, Sep 13, 6:44 AM HADT · 1837 days ago · 35 km deep · 86 km away
5. 1.6194 km WSW of Adak, AlaskaMon, Sep 13, 9:09 AM HADT · 1837 days ago · 20 km deep · 61 km away
6. 2.8223 km W of Adak, AlaskaMon, Sep 13, 1:06 PM HADT · 1837 days ago · 78 km deep · 78 km away
7. 2.0133 km W of Adak, AlaskaWed, Sep 15, 7:55 PM HADT · 1834 days ago · 15 km deep · 16 km away
8. 2.1136 km W of Adak, AKWed, Sep 15, 7:55 PM HADT · 1834 days ago · 17 km deep · 13 km away
9. 2.7215 km W of Adak, AlaskaThu, Sep 16, 3:18 AM HADT · 1834 days ago · 73 km deep · 69 km away
10. 2.068 km SW of Adak, AlaskaFri, Sep 17, 12:31 AM HADT · 1833 days ago · 35 km deep · 94 km away
11. 2.7201 km WSW of Adak, AlaskaSat, Sep 18, 9:41 PM HADT · 1831 days ago · 16 km deep · 85 km away
12. 2.0114 km WSW of Adak, AlaskaSun, Sep 19, 8:47 AM HADT · 1831 days ago · 48 km deep · 65 km away
13. 1.5114 km WSW of Adak, AlaskaSun, Sep 19, 11:41 AM HADT · 1831 days ago · 14 km deep · 49 km away
14. 1.688 km SW of Adak, AlaskaMon, Sep 20, 2:38 AM HADT · 1830 days ago · 37 km deep · 89 km away
15. 1.6124 km WSW of Adak, AlaskaMon, Sep 20, 3:25 AM HADT · 1830 days ago · 15 km deep · 49 km away
16. 2.8220 km WSW of Adak, AlaskaMon, Sep 20, 3:56 AM HADT · 1830 days ago · 22 km deep · 95 km away
17. 2.1135 km W of Adak, AlaskaMon, Sep 20, 7:27 AM HADT · 1830 days ago · 133 km deep · 31 km away
18. 1.9100 km WSW of Adak, AlaskaMon, Sep 20, 5:19 PM HADT · 1829 days ago · 58 km deep · 69 km away
19. 1.872 km WSW of Adak, AlaskaTue, Sep 21, 3:44 AM HADT · 1829 days ago · 14 km deep · 86 km away
20. 2.0168 km WSW of Adak, AlaskaWed, Sep 22, 8:04 AM HADT · 1828 days ago · 26 km deep · 46 km away
21. 1.896 km SW of Adak, AlaskaWed, Sep 22, 10:24 AM HADT · 1828 days ago · 33 km deep · 78 km away
22. 2.5219 km WSW of Adak, AlaskaWed, Sep 22, 12:43 PM HADT · 1828 days ago · 26 km deep · 96 km away
23. 2.7221 km WSW of Adak, AlaskaWed, Sep 22, 2:02 PM HADT · 1828 days ago · 15 km deep · 95 km away
24. 1.9129 km W of Adak, AlaskaWed, Sep 22, 5:02 PM HADT · 1827 days ago · 13 km deep · 20 km away
25. 1.8129 km WSW of Adak, AlaskaWed, Sep 22, 8:38 PM HADT · 1827 days ago · 11 km deep · 33 km away
26. 1.9222 km WSW of Adak, AlaskaThu, Sep 23, 12:30 AM HADT · 1827 days ago · 12 km deep · 79 km away
27. 1.6165 km WSW of Adak, AlaskaThu, Sep 23, 12:37 AM HADT · 1827 days ago · 24 km deep · 65 km away
28. 1.788 km WSW of Adak, AlaskaThu, Sep 23, 4:09 AM HADT · 1827 days ago · 60 km deep · 72 km away
29. 2.0133 km W of Adak, AlaskaThu, Sep 23, 2:46 PM HADT · 1826 days ago · 132 km deep · 31 km away
30. 3.1121 km WSW of Adak, AlaskaThu, Sep 23, 3:00 PM HADT · 1826 days ago · 78 km deep · 31 km away
31. 1.5208 km WSW of Adak, AlaskaThu, Sep 23, 3:47 PM HADT · 1826 days ago · 22 km deep · 79 km away
32. 5.5185 km WSW of Adak, AlaskaThu, Sep 23, 10:02 PM HADT · 1826 days ago · 18 km deep · 73 km away
33. 3.2187 km WSW of Adak, AlaskaThu, Sep 23, 10:08 PM HADT · 1826 days ago · 33 km deep · 72 km away
34. 3.4184 km WSW of Adak, AlaskaThu, Sep 23, 10:13 PM HADT · 1826 days ago · 28 km deep · 73 km away
35. 1.7Andreanof Islands, Aleutian Islands, AlaskaThu, Sep 23, 10:14 PM HADT · 1826 days ago · 21 km deep · 71 km away
36. 1.692 km WSW of Adak, AlaskaFri, Sep 24, 1:02 AM HADT · 1826 days ago · 13 km deep · 72 km away
37. 6.1187 km WSW of Adak, AlaskaFri, Sep 24, 2:52 AM HADT · 1826 days ago · 18 km deep · 78 km away · felt by 7 · tsunami flag
38. 2.0191 km WSW of Adak, AlaskaFri, Sep 24, 3:54 AM HADT · 1826 days ago · 10 km deep · 88 km away
39. 2.0178 km WSW of Adak, AlaskaFri, Sep 24, 9:00 AM HADT · 1826 days ago · 22 km deep · 71 km away
40. 1.6191 km WSW of Adak, AlaskaFri, Sep 24, 11:13 AM HADT · 1826 days ago · 9 km deep · 84 km away
41. 2.0189 km WSW of Adak, AlaskaFri, Sep 24, 11:15 AM HADT · 1826 days ago · 20 km deep · 80 km away
42. 1.7188 km WSW of Adak, AlaskaFri, Sep 24, 11:28 AM HADT · 1826 days ago · 21 km deep · 74 km away
43. 1.8182 km WSW of Adak, AlaskaFri, Sep 24, 11:38 AM HADT · 1826 days ago · 26 km deep · 71 km away
44. 2.1110 km SW of Adak, AlaskaSat, Sep 25, 5:21 PM HADT · 1824 days ago · 26 km deep · 91 km away
45. 1.6221 km WSW of Adak, AlaskaSat, Sep 25, 6:53 PM HADT · 1824 days ago · 50 km deep · 78 km away
46. 2.0211 km W of Adak, AlaskaSat, Sep 25, 11:04 PM HADT · 1824 days ago · 104 km deep · 65 km away
47. 3.1190 km WSW of Adak, AlaskaSun, Sep 26, 4:56 AM HADT · 1824 days ago · 32 km deep · 68 km away
48. 3.1179 km WSW of Adak, AlaskaSun, Sep 26, 7:20 PM HADT · 1823 days ago · 63 km deep · 48 km away
49. 1.8133 km W of Adak, AlaskaMon, Sep 27, 9:28 AM HADT · 1823 days ago · 8 km deep · 16 km away
50. 1.7Andreanof Islands, Aleutian Islands, AlaskaMon, Sep 27, 9:28 AM HADT · 1823 days ago · 21 km deep · 12 km away
51. 1.8Andreanof Islands, Aleutian Islands, AlaskaTue, Sep 28, 11:23 PM HADT · 1821 days ago · 15 km deep · 82 km away
52. 2.5114 km W of Adak, AlaskaTue, Sep 28, 11:31 PM HADT · 1821 days ago · 137 km deep · 47 km away
53. 3.1135 km WSW of Adak, AlaskaWed, Sep 29, 12:55 AM HADT · 1821 days ago · 30 km deep · 70 km away
54. 2.1102 km WSW of Adak, AlaskaThu, Sep 30, 2:54 AM HADT · 1820 days ago · 8 km deep · 54 km away
55. 2.3172 km WSW of Adak, AlaskaThu, Sep 30, 10:30 PM HADT · 1819 days ago · 21 km deep · 45 km away
56. 2.8209 km WSW of Adak, AlaskaFri, Oct 1, 12:39 AM HADT · 1819 days ago · 5 km deep · 97 km away
57. 1.8207 km WSW of Adak, AlaskaFri, Oct 1, 11:11 PM HADT · 1818 days ago · 8 km deep · 88 km away
58. 1.7144 km WSW of Adak, AlaskaSat, Oct 2, 8:43 AM HADT · 1818 days ago · 24 km deep · 58 km away
59. 2.7116 km WSW of Adak, AlaskaSat, Oct 2, 10:35 AM HADT · 1818 days ago · 13 km deep · 48 km away
60. 3.9116 km WSW of Adak, AlaskaSat, Oct 2, 4:45 PM HADT · 1817 days ago · 35 km deep · 70 km away

The first 60 of 129.

Before

1. 1.5153 km WSW of Adak, AlaskaSat, Sep 11, 6:04 AM HADT · 1839 days ago · 14 km deep · 28 km away
2. 1.7169 km W of Adak, AlaskaFri, Sep 10, 10:30 PM HADT · 1839 days ago · 12 km deep · 23 km away
3. 1.5Andreanof Islands, Aleutian Islands, AlaskaThu, Sep 9, 8:27 PM HADT · 1840 days ago · 59 km deep · 87 km away
4. 2.1147 km SW of Adak, AlaskaThu, Sep 9, 2:43 PM HADT · 1840 days ago · 26 km deep · 92 km away
5. 2.9126 km SW of Adak, AlaskaThu, Sep 9, 2:23 PM HADT · 1841 days ago · 35 km deep · 84 km away
6. 2.2228 km W of Adak, AlaskaThu, Sep 9, 12:17 PM HADT · 1841 days ago · 149 km deep · 85 km away
7. 1.5155 km W of Adak, AlaskaWed, Sep 8, 6:01 AM HADT · 1842 days ago · 2 km deep · 10 km away
8. 1.6168 km WSW of Adak, AlaskaTue, Sep 7, 11:43 PM HADT · 1842 days ago · 26 km deep · 69 km away
9. 1.8114 km WSW of Adak, AlaskaTue, Sep 7, 9:55 PM HADT · 1842 days ago · 15 km deep · 49 km away
10. 1.5185 km W of Adak, AlaskaTue, Sep 7, 8:33 PM HADT · 1842 days ago · 15 km deep · 40 km away
11. 2.9177 km WSW of Adak, AlaskaTue, Sep 7, 6:21 PM HADT · 1842 days ago · 30 km deep · 71 km away
12. 1.6124 km SW of Adak, AlaskaTue, Sep 7, 6:53 AM HADT · 1843 days ago · 26 km deep · 84 km away
13. 1.5225 km W of Adak, AlaskaTue, Sep 7, 5:19 AM HADT · 1843 days ago · 73 km deep · 79 km away
14. 2.8199 km WSW of Adak, AlaskaMon, Sep 6, 6:00 AM HADT · 1844 days ago · 16 km deep · 90 km away
15. 1.766 km SW of Adak, AlaskaSun, Sep 5, 5:37 PM HADT · 1844 days ago · 74 km deep · 94 km away
16. 1.6124 km W of Adak, AlaskaSun, Sep 5, 1:14 AM HADT · 1845 days ago · 11 km deep · 23 km away
17. 1.7189 km WSW of Adak, AlaskaSun, Sep 5, 12:44 AM HADT · 1845 days ago · 3 km deep · 79 km away
18. 1.9134 km W of Adak, AlaskaSat, Sep 4, 10:19 PM HADT · 1845 days ago · 113 km deep · 20 km away
19. 1.8124 km WSW of Adak, AlaskaSat, Sep 4, 6:04 PM HADT · 1845 days ago · 70 km deep · 31 km away
20. 3.0123 km WSW of Adak, AlaskaSat, Sep 4, 3:07 PM HADT · 1845 days ago · 33 km deep · 51 km away

From the USGS Earthquake Hazards Program and its partner networks, event av91372021. Read Thu, Sep 24, 2026, 11:10 AM UTC.