M1.5 earthquake 65 km SW of Adak, Alaska

Magnitude

1.5 (ml), micro

Local time

Wed, Sep 15, 2021, 5:52 PM HADT

UTC

2021-09-16 02:52:25 UTC

Depth

23.4 km (14.5 mi), shallow

Epicenter

51.478° N, 177.325° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 2.2 km horizontally, 2.6 km in depth

Magnitude uncertainty

±0.46

Depth from

From location

Station coverage gap

315°, poorly surrounded by stations

Stations used

4

After

1. 2.0133 km W of Adak, AlaskaWed, Sep 15, 7:55 PM HADT · 1834 days ago · 15 km deep · 88 km away
2. 2.1136 km W of Adak, AKWed, Sep 15, 7:55 PM HADT · 1834 days ago · 17 km deep · 91 km away
3. 2.068 km SW of Adak, AlaskaFri, Sep 17, 12:31 AM HADT · 1833 days ago · 35 km deep · 10 km away
4. 3.224 km SSW of Adak, AlaskaFri, Sep 17, 12:40 PM HADT · 1832 days ago · 77 km deep · 47 km away
5. 2.0114 km WSW of Adak, AlaskaSun, Sep 19, 8:47 AM HADT · 1831 days ago · 48 km deep · 53 km away
6. 1.5114 km WSW of Adak, AlaskaSun, Sep 19, 11:41 AM HADT · 1830 days ago · 14 km deep · 59 km away
7. 1.644 km SSW of Adak, AlaskaSun, Sep 19, 7:25 PM HADT · 1830 days ago · 36 km deep · 39 km away
8. 1.541 km SSE of Adak, AlaskaMon, Sep 20, 12:42 AM HADT · 1830 days ago · 36 km deep · 67 km away
9. 1.688 km SW of Adak, AlaskaMon, Sep 20, 2:38 AM HADT · 1830 days ago · 37 km deep · 24 km away
10. 1.6124 km WSW of Adak, AlaskaMon, Sep 20, 3:25 AM HADT · 1830 days ago · 15 km deep · 67 km away
11. 1.9100 km WSW of Adak, AlaskaMon, Sep 20, 5:19 PM HADT · 1829 days ago · 58 km deep · 40 km away
12. 1.872 km WSW of Adak, AlaskaTue, Sep 21, 3:44 AM HADT · 1829 days ago · 14 km deep · 18 km away
13. 1.896 km SW of Adak, AlaskaWed, Sep 22, 10:24 AM HADT · 1827 days ago · 33 km deep · 34 km away
14. 1.9129 km W of Adak, AlaskaWed, Sep 22, 5:02 PM HADT · 1827 days ago · 13 km deep · 84 km away
15. 1.8129 km WSW of Adak, AlaskaWed, Sep 22, 8:38 PM HADT · 1827 days ago · 11 km deep · 77 km away
16. 2.753 km SE of Adak, AlaskaWed, Sep 22, 8:40 PM HADT · 1827 days ago · 35 km deep · 81 km away
17. 1.559 km SE of Adak, AlaskaWed, Sep 22, 10:44 PM HADT · 1827 days ago · 26 km deep · 91 km away
18. 1.762 km SE of Adak, AlaskaThu, Sep 23, 1:35 AM HADT · 1827 days ago · 43 km deep · 95 km away
19. 1.788 km WSW of Adak, AlaskaThu, Sep 23, 4:09 AM HADT · 1827 days ago · 60 km deep · 32 km away
20. 1.579 km S of Adak, AlaskaThu, Sep 23, 7:08 AM HADT · 1827 days ago · 26 km deep · 70 km away
21. 3.1121 km WSW of Adak, AlaskaThu, Sep 23, 3:00 PM HADT · 1826 days ago · 78 km deep · 73 km away
22. 1.692 km WSW of Adak, AlaskaFri, Sep 24, 1:02 AM HADT · 1826 days ago · 13 km deep · 34 km away
23. 2.032 km E of Adak, AlaskaFri, Sep 24, 3:37 AM HADT · 1826 days ago · 75 km deep · 91 km away
24. 1.619 km SSW of Adak, AlaskaFri, Sep 24, 8:25 AM HADT · 1826 days ago · 75 km deep · 47 km away
25. 1.543 km S of Adak, AlaskaFri, Sep 24, 1:58 PM HADT · 1825 days ago · 43 km deep · 47 km away
26. 2.1110 km SW of Adak, AlaskaSat, Sep 25, 5:21 PM HADT · 1824 days ago · 26 km deep · 46 km away
27. 2.861 km SE of Adak, AlaskaSun, Sep 26, 10:39 PM HADT · 1823 days ago · 35 km deep · 84 km away
28. 1.8133 km W of Adak, AlaskaMon, Sep 27, 9:28 AM HADT · 1822 days ago · 8 km deep · 88 km away
29. 1.7Andreanof Islands, Aleutian Islands, AlaskaMon, Sep 27, 9:28 AM HADT · 1822 days ago · 21 km deep · 95 km away
30. 1.653 km SE of Adak, AlaskaMon, Sep 27, 2:21 PM HADT · 1822 days ago · 32 km deep · 88 km away
31. 1.663 km SSW of Adak, AlaskaTue, Sep 28, 12:25 AM HADT · 1822 days ago · 20 km deep · 21 km away
32. 1.861 km SE of Adak, AlaskaTue, Sep 28, 3:03 PM HADT · 1821 days ago · 23 km deep · 92 km away
33. 2.5114 km W of Adak, AlaskaTue, Sep 28, 11:31 PM HADT · 1821 days ago · 137 km deep · 92 km away
34. 3.1135 km WSW of Adak, AlaskaWed, Sep 29, 12:55 AM HADT · 1821 days ago · 30 km deep · 72 km away
35. 2.1102 km WSW of Adak, AlaskaThu, Sep 30, 2:54 AM HADT · 1820 days ago · 8 km deep · 50 km away
36. 2.623 km SSE of Adak, AlaskaFri, Oct 1, 6:13 AM HADT · 1819 days ago · 69 km deep · 63 km away
37. 1.763 km SE of Adak, AlaskaFri, Oct 1, 8:15 PM HADT · 1818 days ago · 27 km deep · 95 km away
38. 1.7144 km WSW of Adak, AlaskaSat, Oct 2, 8:43 AM HADT · 1818 days ago · 24 km deep · 84 km away
39. 2.7116 km WSW of Adak, AlaskaSat, Oct 2, 10:35 AM HADT · 1817 days ago · 13 km deep · 61 km away
40. 1.926 km S of Adak, AlaskaSat, Oct 2, 2:49 PM HADT · 1817 days ago · 63 km deep · 55 km away
41. 3.9116 km WSW of Adak, AlaskaSat, Oct 2, 4:45 PM HADT · 1817 days ago · 35 km deep · 54 km away
42. 1.539 km SSE of Adak, AlaskaSun, Oct 3, 11:36 AM HADT · 1816 days ago · 26 km deep · 66 km away
43. 1.8133 km SW of Adak, AlaskaSun, Oct 3, 12:33 PM HADT · 1816 days ago · 25 km deep · 70 km away
44. 3.1140 km SW of Adak, AlaskaTue, Oct 5, 5:42 AM HADT · 1815 days ago · 28 km deep · 76 km away
45. 1.9132 km WSW of Adak, AlaskaTue, Oct 5, 9:08 AM HADT · 1815 days ago · 7 km deep · 83 km away
46. 2.3130 km SW of Adak, AlaskaTue, Oct 5, 12:57 PM HADT · 1814 days ago · 28 km deep · 66 km away
47. 2.5134 km WSW of Adak, AlaskaTue, Oct 5, 6:49 PM HADT · 1814 days ago · 21 km deep · 85 km away
48. 1.9Andreanof Islands, Aleutian Islands, AlaskaWed, Oct 6, 8:43 PM HADT · 1813 days ago · 24 km deep · 25 km away
49. 1.8112 km SW of Adak, AlaskaWed, Oct 6, 8:53 PM HADT · 1813 days ago · 18 km deep · 49 km away
50. 1.6111 km SW of Adak, AlaskaWed, Oct 6, 8:56 PM HADT · 1813 days ago · 26 km deep · 47 km away
51. 1.6106 km SW of Adak, AlaskaWed, Oct 6, 9:54 PM HADT · 1813 days ago · 23 km deep · 42 km away
52. 1.6111 km SW of Adak, AlaskaWed, Oct 6, 10:02 PM HADT · 1813 days ago · 15 km deep · 46 km away
53. 1.8121 km SW of Adak, AlaskaWed, Oct 6, 11:19 PM HADT · 1813 days ago · 21 km deep · 56 km away
54. 2.5105 km WSW of Adak, AlaskaThu, Oct 7, 2:25 AM HADT · 1813 days ago · 48 km deep · 47 km away
55. 2.9132 km WSW of Adak, AlaskaThu, Oct 7, 9:36 PM HADT · 1812 days ago · 10 km deep · 83 km away
56. 1.981 km WSW of Adak, AlaskaThu, Oct 7, 10:05 PM HADT · 1812 days ago · 30 km deep · 25 km away
57. 3.270 km SW of Adak, AlaskaFri, Oct 8, 7:10 AM HADT · 1812 days ago · 49 km deep · 6 km away
58. 3.340 km SE of Adak, AlaskaFri, Oct 8, 8:19 AM HADT · 1812 days ago · 35 km deep · 77 km away
59. 1.745 km W of Adak, AlaskaSat, Oct 9, 2:34 AM HADT · 1811 days ago · 92 km deep · 38 km away
60. 2.6128 km WSW of Adak, AlaskaSat, Oct 9, 8:09 PM HADT · 1810 days ago · 19 km deep · 73 km away

The first 60 of 138.

Before

1. 1.660 km SE of Adak, AlaskaTue, Sep 14, 6:47 PM HADT · 1835 days ago · 13 km deep · 83 km away
2. 1.756 km SE of Adak, AlaskaTue, Sep 14, 6:24 PM HADT · 1835 days ago · 13 km deep · 80 km away
3. 1.553 km SW of Adak, AlaskaMon, Sep 13, 9:31 AM HADT · 1836 days ago · 46 km deep · 12 km away
4. 3.692 km SW of Adak, AlaskaMon, Sep 13, 6:44 AM HADT · 1837 days ago · 35 km deep · 28 km away
5. 1.782 km W of Adak, AlaskaMon, Sep 13, 3:35 AM HADT · 1837 days ago · 12 km deep · 52 km away
6. 2.7133 km W of Adak, AlaskaSun, Sep 12, 11:47 AM HADT · 1837 days ago · 141 km deep · 99 km away
7. 2.957 km SSE of Adak, AlaskaSun, Sep 12, 5:44 AM HADT · 1838 days ago · 35 km deep · 79 km away
8. 1.5Andreanof Islands, Aleutian Islands, AlaskaThu, Sep 9, 8:27 PM HADT · 1840 days ago · 59 km deep · 21 km away
9. 2.1147 km SW of Adak, AlaskaThu, Sep 9, 2:43 PM HADT · 1840 days ago · 26 km deep · 82 km away
10. 2.9126 km SW of Adak, AlaskaThu, Sep 9, 2:23 PM HADT · 1840 days ago · 35 km deep · 62 km away
11. 2.7105 km SSE of Adak, AlaskaWed, Sep 8, 10:00 AM HADT · 1841 days ago · 10 km deep · 92 km away
12. 1.649 km SW of Adak, AlaskaTue, Sep 7, 11:09 PM HADT · 1842 days ago · 44 km deep · 17 km away
13. 1.8114 km WSW of Adak, AlaskaTue, Sep 7, 9:55 PM HADT · 1842 days ago · 15 km deep · 59 km away
14. 1.962 km SE of Adak, AlaskaTue, Sep 7, 9:12 AM HADT · 1843 days ago · 26 km deep · 88 km away
15. 1.6124 km SW of Adak, AlaskaTue, Sep 7, 6:53 AM HADT · 1843 days ago · 26 km deep · 60 km away
16. 1.7111 km S of Adak, AlaskaTue, Sep 7, 4:40 AM HADT · 1843 days ago · 35 km deep · 72 km away
17. 1.663 km SSE of Adak, AlaskaMon, Sep 6, 11:07 PM HADT · 1843 days ago · 19 km deep · 78 km away
18. 1.766 km SW of Adak, AlaskaSun, Sep 5, 5:37 PM HADT · 1844 days ago · 74 km deep · 11 km away
19. 1.6124 km W of Adak, AlaskaSun, Sep 5, 1:14 AM HADT · 1845 days ago · 11 km deep · 86 km away
20. 1.570 km SSE of Adak, AlaskaSat, Sep 4, 10:36 PM HADT · 1845 days ago · 18 km deep · 78 km away

From the USGS Earthquake Hazards Program and its partner networks, event av91041233. Read Thu, Sep 24, 2026, 5:45 AM UTC.