M1.6 earthquake 81 km W of Adak, Alaska

Magnitude

1.6 (ml), micro

Local time

Wed, Feb 17, 2021, 6:37 AM HAST

UTC

2021-02-17 16:37:01 UTC

Depth

4.0 km (2.5 mi), shallow

Epicenter

51.857° N, 177.821° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.3 km in depth

Magnitude uncertainty

±0.31

Depth from

From location

Station coverage gap

151°

Stations used

9

After

1. 1.9126 km WSW of Adak, AlaskaWed, Feb 17, 6:54 AM HAST · 2047 days ago · 26 km deep · 65 km away
2. 2.5122 km WSW of Adak, AlaskaWed, Feb 17, 3:08 PM HAST · 2046 days ago · 75 km deep · 50 km away
3. 2.748 km WSW of Adak, AlaskaThu, Feb 18, 8:40 AM HAST · 2046 days ago · 81 km deep · 40 km away
4. 2.260 km W of Adak, AlaskaThu, Feb 18, 9:34 PM HAST · 2045 days ago · 103 km deep · 25 km away
5. 4.171 km SSW of Adak, AlaskaFri, Feb 19, 5:33 AM HAST · 2045 days ago · 35 km deep · 94 km away · felt by 1
6. 3.6136 km WSW of Adak, AlaskaFri, Feb 19, 9:36 AM HAST · 2045 days ago · 19 km deep · 73 km away
7. 1.519 km SW of Adak, AlaskaFri, Feb 19, 10:28 PM HAST · 2044 days ago · 73 km deep · 71 km away
8. 1.856 km SW of Adak, AlaskaSat, Feb 20, 4:11 AM HAST · 2044 days ago · 30 km deep · 52 km away
9. 2.4109 km W of Adak, AlaskaSat, Feb 20, 4:41 AM HAST · 2044 days ago · 188 km deep · 31 km away
10. 1.9117 km WSW of Adak, AlaskaSat, Feb 20, 5:02 PM HAST · 2043 days ago · 27 km deep · 53 km away
11. 1.964 km SSW of Adak, AlaskaSat, Feb 20, 10:33 PM HAST · 2043 days ago · 27 km deep · 79 km away
12. 2.1111 km W of Adak, AlaskaSat, Feb 20, 11:28 PM HAST · 2043 days ago · 80 km deep · 31 km away
13. 1.7126 km WSW of Adak, AlaskaSun, Feb 21, 12:42 AM HAST · 2043 days ago · 13 km deep · 48 km away
14. 2.781 km WSW of Adak, AlaskaSun, Feb 21, 2:30 AM HAST · 2043 days ago · 79 km deep · 23 km away
15. 2.899 km WSW of Adak, AlaskaSun, Feb 21, 1:24 PM HAST · 2042 days ago · 34 km deep · 46 km away
16. 1.9134 km SW of Adak, AlaskaMon, Feb 22, 12:33 PM HAST · 2041 days ago · 41 km deep · 84 km away
17. 2.039 km W of Adak, AlaskaMon, Feb 22, 2:40 PM HAST · 2041 days ago · 98 km deep · 42 km away
18. 1.835 km SSE of Adak, AlaskaMon, Feb 22, 3:51 PM HAST · 2041 days ago · 49 km deep · 95 km away
19. 1.845 km SW of Adak, AlaskaMon, Feb 22, 7:25 PM HAST · 2041 days ago · 63 km deep · 59 km away
20. 1.8139 km WSW of Adak, AlaskaMon, Feb 22, 8:06 PM HAST · 2041 days ago · 25 km deep · 75 km away
21. 2.893 km WSW of Adak, AlaskaTue, Feb 23, 12:58 AM HAST · 2041 days ago · 35 km deep · 49 km away
22. 1.9170 km W of Adak, AlaskaTue, Feb 23, 3:24 AM HAST · 2041 days ago · 5 km deep · 89 km away
23. 1.876 km SSW of Adak, AlaskaTue, Feb 23, 4:38 PM HAST · 2040 days ago · 36 km deep · 79 km away
24. 1.762 km SW of Adak, AlaskaTue, Feb 23, 6:09 PM HAST · 2040 days ago · 33 km deep · 53 km away
25. 1.587 km W of Adak, AlaskaWed, Feb 24, 1:29 AM HAST · 2040 days ago · 5 km deep · 6 km away
26. 2.0143 km WSW of Adak, AlaskaWed, Feb 24, 11:09 PM HAST · 2039 days ago · 25 km deep · 75 km away
27. 2.729 km N of Adak, AlaskaThu, Feb 25, 5:58 AM HAST · 2039 days ago · 142 km deep · 88 km away
28. 2.074 km WSW of Adak, AlaskaFri, Feb 26, 8:00 AM HAST · 2038 days ago · 66 km deep · 33 km away
29. 1.763 km SSW of Adak, AlaskaFri, Feb 26, 2:13 PM HAST · 2037 days ago · 27 km deep · 81 km away
30. 1.8128 km WSW of Adak, AlaskaSat, Feb 27, 1:22 AM HAST · 2037 days ago · 13 km deep · 50 km away
31. 2.0116 km WSW of Adak, AlaskaSat, Feb 27, 9:33 PM HAST · 2036 days ago · 85 km deep · 39 km away
32. 2.655 km SSW of Adak, AlaskaWed, Mar 3, 1:08 PM HAST · 2032 days ago · 35 km deep · 75 km away
33. 3.549 km SSW of Adak, AlaskaThu, Mar 4, 2:39 AM HAST · 2032 days ago · 38 km deep · 77 km away
34. 1.952 km SSW of Adak, AlaskaFri, Mar 5, 12:22 PM HAST · 2030 days ago · 37 km deep · 79 km away
35. 3.522 km NNW of Adak, AlaskaFri, Mar 5, 8:22 PM HAST · 2030 days ago · 153 km deep · 75 km away
36. 2.8113 km WSW of Adak, AlaskaSat, Mar 6, 8:55 PM HAST · 2029 days ago · 17 km deep · 52 km away
37. 2.0119 km W of Adak, AlaskaMon, Mar 8, 8:28 AM HAST · 2028 days ago · 9 km deep · 38 km away
38. 3.1123 km WSW of Adak, AlaskaMon, Mar 8, 1:52 PM HAST · 2027 days ago · 30 km deep · 69 km away
39. 1.6117 km W of Adak, AlaskaMon, Mar 8, 3:59 PM HAST · 2027 days ago · 15 km deep · 35 km away
40. 1.8122 km WSW of Adak, AlaskaMon, Mar 8, 6:31 PM HAST · 2027 days ago · 13 km deep · 46 km away
41. 1.9148 km SW of Adak, AlaskaMon, Mar 8, 9:15 PM HAST · 2027 days ago · 21 km deep · 90 km away
42. 1.9130 km WSW of Adak, AlaskaMon, Mar 8, 10:44 PM HAST · 2027 days ago · 45 km deep · 68 km away
43. 1.8152 km WSW of Adak, AlaskaTue, Mar 9, 8:20 PM HAST · 2026 days ago · 20 km deep · 92 km away
44. 1.5127 km WSW of Adak, AlaskaTue, Mar 9, 11:45 PM HAST · 2026 days ago · 18 km deep · 64 km away
45. 1.584 km W of Adak, AlaskaWed, Mar 10, 1:11 AM HAST · 2026 days ago · 8 km deep · 4 km away
46. 1.6103 km WSW of Adak, AlaskaWed, Mar 10, 1:12 AM HAST · 2026 days ago · 5 km deep · 38 km away
47. 1.8133 km WSW of Adak, AlaskaWed, Mar 10, 2:10 AM HAST · 2026 days ago · 36 km deep · 67 km away
48. 1.7176 km W of Adak, AlaskaWed, Mar 10, 3:33 AM HAST · 2026 days ago · 14 km deep · 94 km away
49. 1.5133 km W of Adak, AlaskaThu, Mar 11, 6:13 AM HAST · 2025 days ago · 7 km deep · 53 km away
50. 2.00 km E of Adak, AlaskaThu, Mar 11, 7:09 PM HAST · 2024 days ago · 98 km deep · 82 km away
51. 1.853 km SSW of Adak, AlaskaFri, Mar 12, 12:33 AM HAST · 2024 days ago · 24 km deep · 82 km away
52. 2.893 km SW of Adak, AlaskaFri, Mar 12, 1:09 PM HAST · 2023 days ago · 39 km deep · 61 km away
53. 1.7111 km WSW of Adak, AlaskaFri, Mar 12, 4:21 PM HAST · 2023 days ago · 13 km deep · 41 km away
54. 2.074 km SSW of Adak, AlaskaFri, Mar 12, 7:22 PM HAST · 2023 days ago · 51 km deep · 78 km away
55. 1.871 km WSW of Adak, AlaskaSat, Mar 13, 1:38 PM HAST · 2022 days ago · 68 km deep · 18 km away
56. 3.0148 km SW of Adak, AlaskaMon, Mar 15, 2:14 AM HADT · 2021 days ago · 10 km deep · 95 km away
57. 2.567 km SSW of Adak, AlaskaMon, Mar 15, 9:36 AM HADT · 2021 days ago · 35 km deep · 87 km away
58. 1.633 km W of Adak, AlaskaMon, Mar 15, 3:58 PM HADT · 2020 days ago · 10 km deep · 49 km away
59. 2.1140 km WSW of Adak, AlaskaMon, Mar 15, 7:59 PM HADT · 2020 days ago · 21 km deep · 80 km away
60. 1.776 km WSW of Adak, AlaskaMon, Mar 15, 10:27 PM HADT · 2020 days ago · 13 km deep · 42 km away

The first 60 of 123.

Before

1. 1.856 km SW of Adak, AlaskaWed, Feb 17, 5:21 AM HAST · 2047 days ago · 57 km deep · 49 km away
2. 2.0135 km WSW of Adak, AlaskaTue, Feb 16, 11:10 AM HAST · 2047 days ago · 24 km deep · 74 km away
3. 2.678 km SW of Adak, AlaskaTue, Feb 16, 9:00 AM HAST · 2048 days ago · 41 km deep · 51 km away
4. 3.9139 km WSW of Adak, AlaskaTue, Feb 16, 6:58 AM HAST · 2048 days ago · 35 km deep · 81 km away
5. 2.656 km S of Adak, AlaskaTue, Feb 16, 4:36 AM HAST · 2048 days ago · 35 km deep · 100 km away
6. 1.861 km SSW of Adak, AlaskaMon, Feb 15, 4:54 PM HAST · 2048 days ago · 33 km deep · 71 km away
7. 1.649 km SSW of Adak, AlaskaMon, Feb 15, 2:19 PM HAST · 2048 days ago · 27 km deep · 70 km away
8. 3.5173 km WSW of Adak, AlaskaSun, Feb 14, 11:37 PM HAST · 2049 days ago · 10 km deep · 94 km away
9. 1.581 km WSW of Adak, AlaskaFri, Feb 12, 2:24 AM HAST · 2052 days ago · 25 km deep · 37 km away
10. 2.8150 km WSW of Adak, AlaskaThu, Feb 11, 11:41 PM HAST · 2052 days ago · 32 km deep · 91 km away
11. 1.753 km W of Adak, AlaskaThu, Feb 11, 6:26 PM HAST · 2052 days ago · -2 km deep · 29 km away
12. 1.848 km SW of Adak, AlaskaWed, Feb 10, 3:47 PM HAST · 2053 days ago · 45 km deep · 62 km away
13. 1.726 km W of Adak, AlaskaWed, Feb 10, 5:24 AM HAST · 2054 days ago · 8 km deep · 55 km away
14. 2.575 km SSW of Adak, AlaskaTue, Feb 9, 9:57 AM HAST · 2054 days ago · 35 km deep · 84 km away
15. 2.8154 km SW of Adak, AlaskaTue, Feb 9, 4:44 AM HAST · 2055 days ago · 31 km deep · 95 km away
16. 1.827 km WNW of Adak, AlaskaSun, Feb 7, 11:08 PM HAST · 2056 days ago · 6 km deep · 55 km away
17. 1.543 km S of Adak, AlaskaSun, Feb 7, 10:55 PM HAST · 2056 days ago · 30 km deep · 88 km away
18. 1.9110 km SW of Adak, AlaskaSun, Feb 7, 12:04 AM HAST · 2057 days ago · 45 km deep · 61 km away
19. 1.863 km SSW of Adak, AlaskaSat, Feb 6, 3:52 PM HAST · 2057 days ago · 35 km deep · 85 km away
20. 3.9112 km SW of Adak, AlaskaFri, Feb 5, 10:38 PM HAST · 2058 days ago · 42 km deep · 65 km away

From the USGS Earthquake Hazards Program and its partner networks, event av91192216. Read Sat, Sep 26, 2026, 7:26 AM UTC.