M4.8 earthquake 98 km SSE of Adak, Alaska

Magnitude

4.8 (mb), light

Local time

Tue, May 20, 1986, 2:08 AM HADT

UTC

1986-05-20 11:08:31 UTC

Depth

33.0 km (20.5 mi), shallow

Epicenter

51.003° N, 176.351° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Depth from

OPERATOR_ASSIGNED

After

1. 4.0110 km SSW of Atka, AlaskaTue, May 20, 2:49 AM HADT · 14742 days ago · 33 km deep · 100 km away
2. 4.6113 km SW of Atka, AlaskaTue, May 20, 2:50 AM HADT · 14742 days ago · 33 km deep · 91 km away
3. 4.886 km S of Adak, AlaskaTue, May 20, 4:48 AM HADT · 14742 days ago · 33 km deep · 13 km away
4. 4.795 km S of Adak, AlaskaTue, May 20, 5:40 AM HADT · 14742 days ago · 33 km deep · 4 km away
5. 3.875 km SE of Adak, AlaskaTue, May 20, 9:10 AM HADT · 14742 days ago · 33 km deep · 50 km away
6. 4.668 km SSE of Adak, AlaskaTue, May 20, 10:05 PM HADT · 14741 days ago · 33 km deep · 37 km away
7. 4.898 km SE of Adak, AlaskaWed, May 21, 8:30 AM HADT · 14741 days ago · 33 km deep · 69 km away
8. 4.573 km ESE of Adak, AlaskaThu, May 22, 2:48 AM HADT · 14740 days ago · 33 km deep · 79 km away
9. 4.5104 km SE of Adak, AlaskaThu, May 22, 7:24 AM HADT · 14740 days ago · 33 km deep · 58 km away
10. 4.989 km SSE of Adak, AlaskaThu, May 22, 10:19 PM HADT · 14739 days ago · 33 km deep · 22 km away
11. 4.689 km SSE of Adak, AlaskaSat, May 24, 7:44 AM HADT · 14738 days ago · 33 km deep · 16 km away
12. 4.892 km SSE of Adak, AlaskaSat, May 24, 10:16 PM HADT · 14737 days ago · 33 km deep · 26 km away
13. 4.763 km SSE of Adak, AlaskaSun, May 25, 10:23 AM HADT · 14737 days ago · 33 km deep · 45 km away
14. 4.281 km SE of Adak, AlaskaTue, May 27, 12:36 AM HADT · 14735 days ago · 33 km deep · 61 km away
15. 4.881 km SSE of Adak, AlaskaWed, May 28, 4:20 AM HADT · 14734 days ago · 33 km deep · 32 km away
16. 4.8113 km SE of Adak, AlaskaThu, May 29, 3:52 PM HADT · 14732 days ago · 33 km deep · 80 km away
17. 4.386 km SE of Adak, AlaskaSat, May 31, 12:53 PM HADT · 14731 days ago · 33 km deep · 58 km away
18. 4.181 km SSE of Adak, AlaskaMon, Jun 2, 12:41 AM HADT · 14729 days ago · 33 km deep · 22 km away
19. 5.1106 km SE of Adak, AlaskaThu, Jun 5, 8:32 AM HADT · 14726 days ago · 33 km deep · 80 km away
20. 4.7107 km SSW of Adak, AlaskaSun, Jun 8, 7:43 AM HADT · 14723 days ago · 33 km deep · 80 km away
21. 4.379 km SSE of Adak, AlaskaMon, Jun 9, 8:33 PM HADT · 14721 days ago · 33 km deep · 39 km away
22. 4.577 km SE of Adak, AlaskaTue, Jun 10, 6:15 AM HADT · 14721 days ago · 33 km deep · 43 km away
23. 4.682 km SE of Adak, AlaskaTue, Jun 10, 8:57 AM HADT · 14721 days ago · 33 km deep · 56 km away
24. 4.493 km ESE of Adak, AlaskaSun, Jun 15, 2:54 PM HADT · 14715 days ago · 33 km deep · 95 km away
25. 4.5104 km SW of Atka, AlaskaTue, Jun 17, 7:03 AM HADT · 14714 days ago · 33 km deep · 97 km away
26. 6.557 km S of Adak, AlaskaTue, Jun 17, 11:05 PM HADT · 14713 days ago · 27 km deep · 45 km away
27. 4.589 km SSE of Adak, AlaskaWed, Jun 18, 1:32 AM HADT · 14713 days ago · 33 km deep · 30 km away
28. 4.883 km SSE of Adak, AlaskaWed, Jun 18, 5:46 AM HADT · 14713 days ago · 33 km deep · 25 km away
29. 4.271 km SE of Adak, AlaskaWed, Jun 18, 9:28 AM HADT · 14713 days ago · 33 km deep · 51 km away
30. 4.536 km SW of Adak, AlaskaWed, Jun 18, 12:47 PM HADT · 14713 days ago · 33 km deep · 79 km away
31. 4.576 km SE of Adak, AlaskaSat, Jun 21, 4:03 AM HADT · 14710 days ago · 33 km deep · 52 km away
32. 5.4125 km SE of Adak, AlaskaSat, Jun 21, 8:28 PM HADT · 14709 days ago · 33 km deep · 85 km away
33. 4.4135 km SE of Adak, AlaskaSat, Jun 21, 8:33 PM HADT · 14709 days ago · 33 km deep · 84 km away
34. 4.2118 km SSW of Atka, AlaskaSat, Jun 21, 10:38 PM HADT · 14709 days ago · 33 km deep · 91 km away
35. 4.263 km SW of Adak, AlaskaSun, Jun 22, 5:40 AM HADT · 14709 days ago · 33 km deep · 82 km away
36. 4.4109 km SW of Atka, AlaskaSun, Jun 22, 6:35 AM HADT · 14709 days ago · 33 km deep · 93 km away
37. 4.6101 km SE of Adak, AlaskaSun, Jun 22, 9:01 AM HADT · 14709 days ago · 33 km deep · 55 km away
38. 4.359 km SW of Adak, AlaskaMon, Jun 23, 12:39 AM HADT · 14708 days ago · 33 km deep · 77 km away
39. 4.853 km S of Adak, AlaskaSun, Jun 29, 4:21 PM HADT · 14701 days ago · 33 km deep · 49 km away
40. 4.558 km S of Adak, AlaskaSun, Jun 29, 7:39 PM HADT · 14701 days ago · 33 km deep · 45 km away
41. 4.455 km SE of Adak, AlaskaSun, Jun 29, 8:49 PM HADT · 14701 days ago · 33 km deep · 71 km away
42. 5.475 km SSE of Adak, AlaskaSun, Jun 29, 9:23 PM HADT · 14701 days ago · 33 km deep · 31 km away
43. 4.236 km S of Adak, AlaskaSun, Jun 29, 9:28 PM HADT · 14701 days ago · 33 km deep · 62 km away
44. 4.093 km SSE of Adak, AlaskaSun, Jun 29, 9:33 PM HADT · 14701 days ago · 33 km deep · 19 km away
45. 4.291 km SSE of Adak, AlaskaSun, Jun 29, 9:55 PM HADT · 14701 days ago · 33 km deep · 20 km away
46. 4.484 km SSE of Adak, AlaskaSun, Jun 29, 9:58 PM HADT · 14701 days ago · 33 km deep · 24 km away
47. 4.761 km SW of Adak, AlaskaMon, Jun 30, 2:44 PM HADT · 14700 days ago · 33 km deep · 71 km away
48. 5.063 km SE of Adak, AlaskaThu, Jul 3, 8:33 AM HADT · 14698 days ago · 33 km deep · 62 km away
49. 4.975 km ESE of Adak, AlaskaThu, Jul 3, 8:58 PM HADT · 14697 days ago · 33 km deep · 71 km away
50. 4.569 km SE of Adak, AlaskaMon, Jul 7, 12:31 AM HADT · 14694 days ago · 33 km deep · 47 km away
51. 4.5Andreanof Islands, Aleutian Islands, AlaskaTue, Jul 8, 6:53 PM HADT · 14692 days ago · 33 km deep · 94 km away
52. 5.026 km SW of Adak, AlaskaWed, Jul 9, 11:24 AM HADT · 14692 days ago · 57 km deep · 84 km away

Before

1. 4.9112 km ESE of Adak, AlaskaTue, May 20, 1:53 AM HADT · 14742 days ago · 33 km deep · 90 km away
2. 4.0109 km SSW of Atka, AlaskaMon, May 19, 5:01 PM HADT · 14742 days ago · 33 km deep · 98 km away
3. 4.8106 km SE of Adak, AlaskaSun, May 18, 8:49 PM HADT · 14743 days ago · 33 km deep · 62 km away
4. 4.077 km SE of Adak, AlaskaSun, May 18, 11:24 AM HADT · 14744 days ago · 33 km deep · 50 km away
5. 4.555 km SSW of Adak, AlaskaSat, May 17, 11:01 PM HADT · 14744 days ago · 33 km deep · 55 km away
6. 4.677 km SSE of Adak, AlaskaSat, May 17, 1:16 PM HADT · 14745 days ago · 33 km deep · 38 km away
7. 4.5133 km SE of Adak, AlaskaSat, May 17, 4:11 AM HADT · 14745 days ago · 33 km deep · 77 km away
8. 3.880 km SE of Adak, AlaskaFri, May 16, 11:26 PM HADT · 14745 days ago · 33 km deep · 62 km away
9. 4.7Andreanof Islands, Aleutian Islands, AlaskaFri, May 16, 11:00 PM HADT · 14745 days ago · 33 km deep · 20 km away
10. 4.3114 km SE of Adak, AlaskaFri, May 16, 3:20 AM HADT · 14746 days ago · 33 km deep · 80 km away
11. 4.0122 km SSW of Atka, AlaskaThu, May 15, 7:09 AM HADT · 14747 days ago · 33 km deep · 90 km away
12. 4.993 km SE of Adak, AlaskaWed, May 14, 6:30 PM HADT · 14747 days ago · 33 km deep · 74 km away
13. 4.882 km SE of Adak, AlaskaWed, May 14, 1:58 PM HADT · 14748 days ago · 33 km deep · 53 km away
14. 4.783 km SE of Adak, AlaskaWed, May 14, 11:19 AM HADT · 14748 days ago · 33 km deep · 57 km away
15. 4.984 km SSE of Adak, AlaskaWed, May 14, 4:28 AM HADT · 14748 days ago · 33 km deep · 18 km away
16. 4.873 km ESE of Adak, AlaskaTue, May 13, 6:28 PM HADT · 14748 days ago · 33 km deep · 74 km away
17. 4.990 km SSE of Adak, AlaskaTue, May 13, 8:15 AM HADT · 14749 days ago · 33 km deep · 20 km away
18. 3.888 km SSE of Adak, AlaskaMon, May 12, 5:18 AM HADT · 14750 days ago · 33 km deep · 25 km away
19. 4.795 km ESE of Adak, AlaskaMon, May 12, 2:37 AM HADT · 14750 days ago · 33 km deep · 78 km away
20. 4.2Andreanof Islands, Aleutian Islands, AlaskaMon, May 12, 1:48 AM HADT · 14750 days ago · 33 km deep · 31 km away

From the USGS Earthquake Hazards Program and its partner networks, event usp0002u7n. Read Tue, Sep 29, 2026, 10:31 AM UTC.