M1.8 earthquake 116 km WSW of Adak, Alaska

Magnitude

1.8 (ml), micro

Local time

Wed, Apr 21, 2021, 6:19 PM HADT

UTC

2021-04-22 03:19:43 UTC

Depth

32.9 km (20.4 mi), shallow

Epicenter

51.568° N, 178.239° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Stations used

23

After

1. 1.9165 km WSW of Adak, AlaskaThu, Apr 22, 5:35 AM HADT · 1981 days ago · 16 km deep · 50 km away
2. 3.094 km SW of Adak, AlaskaThu, Apr 22, 7:39 AM HADT · 1981 days ago · 18 km deep · 40 km away
3. 1.560 km SSW of Adak, AlaskaThu, Apr 22, 11:49 AM HADT · 1981 days ago · 26 km deep · 92 km away
4. 3.168 km SW of Adak, AlaskaThu, Apr 22, 7:25 PM HADT · 1980 days ago · 34 km deep · 67 km away
5. 1.8130 km SW of Adak, AlaskaFri, Apr 23, 12:35 AM HADT · 1980 days ago · 37 km deep · 45 km away
6. 1.7176 km WSW of Adak, AlaskaFri, Apr 23, 5:15 AM HADT · 1980 days ago · 69 km deep · 62 km away
7. 2.547 km SW of Adak, AlaskaFri, Apr 23, 9:56 AM HADT · 1980 days ago · 24 km deep · 75 km away
8. 2.6102 km WSW of Adak, AlaskaFri, Apr 23, 12:38 PM HADT · 1979 days ago · 35 km deep · 29 km away
9. 3.0197 km WSW of Adak, AlaskaSat, Apr 24, 8:16 PM HADT · 1978 days ago · 35 km deep · 87 km away
10. 1.784 km WSW of Adak, AlaskaSat, Apr 24, 9:43 PM HADT · 1978 days ago · 66 km deep · 31 km away
11. 1.9127 km SW of Adak, AlaskaMon, Apr 26, 9:13 PM HADT · 1976 days ago · 40 km deep · 44 km away
12. 2.8104 km WSW of Adak, AlaskaTue, Apr 27, 12:07 PM HADT · 1976 days ago · 30 km deep · 12 km away
13. 1.8166 km W of Adak, AlaskaTue, Apr 27, 12:12 PM HADT · 1976 days ago · 11 km deep · 59 km away
14. 1.5125 km WSW of Adak, AlaskaTue, Apr 27, 1:06 PM HADT · 1975 days ago · 13 km deep · 10 km away
15. 2.2145 km W of Adak, AlaskaTue, Apr 27, 2:35 PM HADT · 1975 days ago · 165 km deep · 35 km away
16. 1.691 km SW of Adak, AlaskaWed, Apr 28, 3:40 AM HADT · 1975 days ago · 18 km deep · 41 km away
17. 1.6114 km WSW of Adak, AlaskaWed, Apr 28, 5:14 AM HADT · 1975 days ago · 19 km deep · 19 km away
18. 1.746 km W of Adak, AlaskaWed, Apr 28, 5:20 AM HADT · 1975 days ago · 80 km deep · 74 km away
19. 2.6102 km WSW of Adak, AlaskaWed, Apr 28, 5:44 PM HADT · 1974 days ago · 61 km deep · 24 km away
20. 1.8127 km SW of Adak, AlaskaWed, Apr 28, 11:16 PM HADT · 1974 days ago · 40 km deep · 39 km away
21. 2.0138 km WSW of Adak, AlaskaThu, Apr 29, 1:08 AM HADT · 1974 days ago · 26 km deep · 32 km away
22. 2.0181 km WSW of Adak, AlaskaMon, May 3, 7:28 PM HADT · 1969 days ago · 20 km deep · 65 km away
23. 1.767 km WSW of Adak, AlaskaMon, May 3, 8:00 PM HADT · 1969 days ago · 72 km deep · 48 km away
24. 1.8131 km WSW of Adak, AlaskaTue, May 4, 3:42 AM HADT · 1969 days ago · 13 km deep · 16 km away
25. 1.9124 km WSW of Adak, AlaskaTue, May 4, 12:51 PM HADT · 1968 days ago · 27 km deep · 27 km away
26. 1.857 km W of Adak, AlaskaTue, May 4, 11:20 PM HADT · 1968 days ago · -2 km deep · 61 km away
27. 2.0148 km WSW of Adak, AlaskaWed, May 5, 4:08 AM HADT · 1968 days ago · 9 km deep · 34 km away
28. 3.8154 km WSW of Adak, AlaskaWed, May 5, 4:34 AM HADT · 1968 days ago · 15 km deep · 43 km away
29. 2.057 km W of Adak, AlaskaWed, May 5, 9:18 PM HADT · 1967 days ago · -2 km deep · 61 km away
30. 1.777 km W of Adak, AlaskaThu, May 6, 7:39 AM HADT · 1967 days ago · 3 km deep · 46 km away
31. 1.776 km W of Adak, AlaskaThu, May 6, 10:17 AM HADT · 1967 days ago · 1 km deep · 46 km away
32. 2.057 km W of Adak, AlaskaFri, May 7, 5:33 AM HADT · 1966 days ago · -2 km deep · 61 km away
33. 1.956 km W of Adak, AlaskaFri, May 7, 5:33 AM HADT · 1966 days ago · 11 km deep · 60 km away
34. 1.9169 km WSW of Adak, AlaskaSat, May 8, 11:24 AM HADT · 1965 days ago · 13 km deep · 53 km away
35. 1.963 km W of Adak, AlaskaThu, May 13, 7:23 AM HADT · 1960 days ago · 103 km deep · 56 km away
36. 3.4202 km WSW of Adak, AlaskaThu, May 13, 4:31 PM HADT · 1959 days ago · 27 km deep · 87 km away
37. 1.974 km SW of Adak, AlaskaThu, May 13, 7:39 PM HADT · 1959 days ago · 26 km deep · 52 km away
38. 1.8131 km WSW of Adak, AlaskaThu, May 13, 10:11 PM HADT · 1959 days ago · 12 km deep · 17 km away
39. 2.1184 km WSW of Adak, AlaskaFri, May 14, 3:18 AM HADT · 1959 days ago · 23 km deep · 70 km away
40. 1.652 km SW of Adak, AlaskaFri, May 14, 8:56 AM HADT · 1959 days ago · 45 km deep · 76 km away
41. 1.5131 km WSW of Adak, AlaskaMon, May 17, 3:49 AM HADT · 1956 days ago · 5 km deep · 20 km away
42. 2.9172 km W of Adak, AlaskaMon, May 17, 5:42 AM HADT · 1956 days ago · 10 km deep · 65 km away
43. 4.2122 km WSW of Adak, AlaskaWed, May 19, 6:05 PM HADT · 1953 days ago · 35 km deep · 8 km away
44. 3.975 km WSW of Adak, AlaskaThu, May 20, 10:24 AM HADT · 1953 days ago · 68 km deep · 45 km away
45. 1.979 km W of Adak, AlaskaThu, May 20, 8:56 PM HADT · 1952 days ago · 9 km deep · 46 km away
46. 1.6141 km WSW of Adak, AlaskaFri, May 21, 3:15 AM HADT · 1952 days ago · 23 km deep · 26 km away
47. 2.0157 km WSW of Adak, AlaskaFri, May 21, 11:06 PM HADT · 1951 days ago · 15 km deep · 44 km away
48. 1.581 km W of Adak, AlaskaSun, May 23, 10:39 AM HADT · 1950 days ago · 8 km deep · 44 km away
49. 3.1144 km W of Adak, AlaskaSun, May 23, 12:06 PM HADT · 1950 days ago · 81 km deep · 33 km away
50. 1.5125 km WSW of Adak, AlaskaTue, May 25, 11:51 PM HADT · 1947 days ago · 15 km deep · 14 km away
51. 4.065 km SW of Adak, AlaskaWed, May 26, 3:41 PM HADT · 1946 days ago · 43 km deep · 76 km away
52. 2.7154 km W of Adak, AlaskaThu, May 27, 11:33 AM HADT · 1946 days ago · 90 km deep · 43 km away
53. 1.9128 km WSW of Adak, AlaskaFri, May 28, 7:28 PM HADT · 1944 days ago · 42 km deep · 27 km away
54. 2.0108 km WSW of Adak, AlaskaSat, May 29, 6:57 AM HADT · 1944 days ago · 48 km deep · 23 km away
55. 4.246 km SW of Adak, AlaskaSun, May 30, 1:56 AM HADT · 1943 days ago · 48 km deep · 78 km away
56. 1.7120 km WSW of Adak, AlaskaSun, May 30, 6:11 PM HADT · 1942 days ago · 26 km deep · 12 km away
57. 1.750 km W of Adak, AlaskaSun, May 30, 7:01 PM HADT · 1942 days ago · 71 km deep · 65 km away
58. 3.482 km SW of Adak, AlaskaMon, May 31, 2:54 PM HADT · 1941 days ago · 45 km deep · 49 km away
59. 1.8158 km WSW of Adak, AlaskaSun, Jun 6, 2:12 AM HADT · 1936 days ago · 18 km deep · 43 km away
60. 1.6127 km WSW of Adak, AlaskaSun, Jun 6, 11:37 AM HADT · 1936 days ago · 7 km deep · 12 km away

The first 60 of 75.

Before

1. 2.0192 km WSW of Adak, AlaskaWed, Apr 21, 4:57 PM HADT · 1981 days ago · 18 km deep · 77 km away
2. 1.9150 km WSW of Adak, AlaskaWed, Apr 21, 4:38 AM HADT · 1982 days ago · 28 km deep · 46 km away
3. 1.8Andreanof Islands, Aleutian Islands, AlaskaTue, Apr 20, 2:50 PM HADT · 1982 days ago · 34 km deep · 62 km away
4. 1.980 km WSW of Adak, AlaskaMon, Apr 19, 8:53 PM HADT · 1983 days ago · 65 km deep · 36 km away
5. 2.8135 km SW of Adak, AlaskaMon, Apr 19, 7:42 PM HADT · 1983 days ago · 35 km deep · 42 km away
6. 1.552 km SW of Adak, AlaskaMon, Apr 19, 7:21 PM HADT · 1983 days ago · 43 km deep · 80 km away
7. 1.790 km WSW of Adak, AlaskaMon, Apr 19, 3:30 PM HADT · 1983 days ago · 25 km deep · 37 km away
8. 1.6169 km WSW of Adak, AlaskaMon, Apr 19, 9:48 AM HADT · 1984 days ago · 32 km deep · 53 km away
9. 2.189 km WSW of Adak, AlaskaMon, Apr 19, 6:16 AM HADT · 1984 days ago · 37 km deep · 32 km away
10. 1.5106 km WSW of Adak, AlaskaMon, Apr 19, 6:10 AM HADT · 1984 days ago · 13 km deep · 16 km away
11. 2.7178 km WSW of Adak, AKSun, Apr 18, 9:33 PM HADT · 1984 days ago · 33 km deep · 69 km away
12. 1.5134 km W of Adak, AlaskaSun, Apr 18, 7:51 PM HADT · 1984 days ago · 6 km deep · 26 km away
13. 1.967 km SSW of Adak, AlaskaSun, Apr 18, 10:07 AM HADT · 1985 days ago · 44 km deep · 79 km away
14. 3.6120 km WSW of Adak, AlaskaSat, Apr 17, 10:27 PM HADT · 1985 days ago · 10 km deep · 16 km away
15. 1.7111 km WSW of Adak, AlaskaSat, Apr 17, 6:48 PM HADT · 1985 days ago · 17 km deep · 13 km away
16. 1.552 km SSW of Adak, AlaskaSat, Apr 17, 6:16 PM HADT · 1985 days ago · 36 km deep · 83 km away
17. 1.7135 km W of Adak, AlaskaSat, Apr 17, 5:15 PM HADT · 1985 days ago · 19 km deep · 37 km away
18. 1.555 km SSW of Adak, AlaskaSat, Apr 17, 5:07 PM HADT · 1985 days ago · 19 km deep · 97 km away
19. 1.633 km SSW of Adak, AlaskaSat, Apr 17, 3:23 AM HADT · 1986 days ago · 51 km deep · 95 km away
20. 1.7119 km WSW of Adak, AlaskaSat, Apr 17, 1:22 AM HADT · 1986 days ago · 17 km deep · 14 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak02155a3c3o. Read Thu, Sep 24, 2026, 8:59 AM UTC.