M4.0 earthquake 101 km SW of Atka, Alaska

Magnitude

4.0 (mb), light

Local time

Sat, Jul 19, 1986, 4:42 AM HADT

UTC

1986-07-19 13:42:55 UTC

Depth

33.0 km (20.5 mi), shallow

Epicenter

51.499° N, 175.158° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Depth from

OPERATOR_ASSIGNED

After

1. 4.631 km SW of Atka, AlaskaSun, Jul 20, 7:19 AM HADT · 14674 days ago · 33 km deep · 71 km away
2. 4.879 km SE of Adak, AlaskaMon, Jul 21, 5:00 PM HADT · 14673 days ago · 33 km deep · 39 km away
3. 5.257 km SSE of Adak, AlaskaTue, Jul 22, 3:08 PM HADT · 14672 days ago · 33 km deep · 72 km away
4. 4.983 km SSE of Adak, AlaskaTue, Jul 22, 6:47 PM HADT · 14672 days ago · 33 km deep · 77 km away
5. 4.993 km SW of Atka, AlaskaThu, Jul 24, 5:03 AM HADT · 14670 days ago · 33 km deep · 20 km away
6. 5.876 km SSE of Adak, AlaskaFri, Jul 25, 12:01 AM HADT · 14670 days ago · 33 km deep · 76 km away
7. 5.683 km SSE of Adak, AlaskaFri, Jul 25, 12:04 AM HADT · 14670 days ago · 33 km deep · 68 km away
8. 4.669 km ESE of Adak, AlaskaFri, Jul 25, 1:06 AM HADT · 14670 days ago · 33 km deep · 44 km away
9. 4.793 km SSE of Adak, AlaskaFri, Jul 25, 2:27 PM HADT · 14669 days ago · 33 km deep · 65 km away
10. 4.497 km SSE of Adak, AlaskaSat, Jul 26, 6:18 PM HADT · 14668 days ago · 33 km deep · 84 km away
11. 5.4Andreanof Islands, Aleutian Islands, AlaskaSun, Jul 27, 7:06 PM HADT · 14667 days ago · 33 km deep · 74 km away
12. 4.844 km E of Adak, AlaskaSun, Jul 27, 7:54 PM HADT · 14667 days ago · 33 km deep · 71 km away
13. 5.588 km WSW of Atka, AlaskaMon, Jul 28, 12:57 PM HADT · 14666 days ago · 33 km deep · 32 km away
14. 4.785 km SW of Atka, AlaskaMon, Jul 28, 2:29 PM HADT · 14666 days ago · 33 km deep · 28 km away
15. 4.4Andreanof Islands, Aleutian Islands, AlaskaMon, Jul 28, 6:16 PM HADT · 14666 days ago · 33 km deep · 45 km away
16. 4.883 km SSE of Adak, AlaskaFri, Aug 1, 10:46 AM HADT · 14662 days ago · 33 km deep · 81 km away
17. 4.986 km SSE of Adak, AlaskaFri, Aug 1, 11:24 AM HADT · 14662 days ago · 33 km deep · 78 km away
18. 5.492 km S of Atka, AlaskaFri, Aug 1, 12:05 PM HADT · 14662 days ago · 33 km deep · 62 km away
19. 4.889 km S of Atka, AlaskaFri, Aug 1, 12:41 PM HADT · 14662 days ago · 33 km deep · 64 km away
20. 4.986 km S of Atka, AlaskaFri, Aug 1, 12:48 PM HADT · 14662 days ago · 33 km deep · 66 km away
21. 4.354 km SSE of Adak, AlaskaFri, Aug 1, 12:49 PM HADT · 14662 days ago · 33 km deep · 77 km away
22. 4.571 km S of Atka, AlaskaFri, Aug 1, 1:09 PM HADT · 14662 days ago · 33 km deep · 70 km away
23. 5.076 km SE of Adak, AlaskaFri, Aug 1, 9:37 PM HADT · 14662 days ago · 33 km deep · 61 km away
24. 4.795 km SSW of Atka, AlaskaSat, Aug 2, 10:58 AM HADT · 14661 days ago · 33 km deep · 30 km away
25. 5.087 km S of Atka, AlaskaSat, Aug 2, 5:39 PM HADT · 14661 days ago · 33 km deep · 70 km away
26. 4.3Andreanof Islands, Aleutian Islands, AlaskaSat, Aug 9, 7:57 AM HADT · 14654 days ago · 33 km deep · 35 km away
27. 4.888 km SW of Atka, AlaskaThu, Aug 14, 5:28 AM HADT · 14649 days ago · 33 km deep · 20 km away
28. 4.237 km E of Adak, AlaskaMon, Aug 18, 5:34 PM HADT · 14645 days ago · 33 km deep · 75 km away
29. 4.364 km ESE of Adak, AlaskaThu, Aug 21, 3:24 AM HADT · 14642 days ago · 33 km deep · 46 km away
30. 4.488 km SW of Atka, AlaskaMon, Sep 1, 9:46 AM HADT · 14631 days ago · 33 km deep · 19 km away

Before

1. 4.888 km SSW of Atka, AlaskaThu, Jul 17, 9:37 AM HADT · 14677 days ago · 33 km deep · 40 km away
2. 5.527 km E of Adak, AlaskaWed, Jul 9, 8:10 AM HADT · 14685 days ago · 50 km deep · 87 km away
3. 4.5Andreanof Islands, Aleutian Islands, AlaskaTue, Jul 8, 6:53 PM HADT · 14686 days ago · 33 km deep · 11 km away
4. 4.569 km SE of Adak, AlaskaMon, Jul 7, 12:31 AM HADT · 14688 days ago · 33 km deep · 61 km away
5. 4.975 km ESE of Adak, AlaskaThu, Jul 3, 8:58 PM HADT · 14691 days ago · 33 km deep · 39 km away
6. 5.063 km SE of Adak, AlaskaThu, Jul 3, 8:33 AM HADT · 14691 days ago · 33 km deep · 54 km away
7. 4.484 km SSE of Adak, AlaskaSun, Jun 29, 9:58 PM HADT · 14695 days ago · 33 km deep · 78 km away
8. 4.291 km SSE of Adak, AlaskaSun, Jun 29, 9:55 PM HADT · 14695 days ago · 33 km deep · 79 km away
9. 4.093 km SSE of Adak, AlaskaSun, Jun 29, 9:33 PM HADT · 14695 days ago · 33 km deep · 80 km away
10. 4.236 km S of Adak, AlaskaSun, Jun 29, 9:28 PM HADT · 14695 days ago · 33 km deep · 100 km away
11. 5.475 km SSE of Adak, AlaskaSun, Jun 29, 9:23 PM HADT · 14695 days ago · 33 km deep · 75 km away
12. 4.455 km SE of Adak, AlaskaSun, Jun 29, 8:49 PM HADT · 14695 days ago · 33 km deep · 57 km away
13. 4.743 km W of Atka, AlaskaSat, Jun 28, 7:32 PM HADT · 14696 days ago · 33 km deep · 87 km away
14. 5.446 km WNW of Atka, AlaskaSat, Jun 28, 7:30 PM HADT · 14696 days ago · 33 km deep · 95 km away
15. 4.383 km SW of Atka, AlaskaMon, Jun 23, 3:43 AM HADT · 14701 days ago · 33 km deep · 24 km away
16. 4.6101 km SE of Adak, AlaskaSun, Jun 22, 9:01 AM HADT · 14702 days ago · 33 km deep · 46 km away
17. 4.4109 km SW of Atka, AlaskaSun, Jun 22, 6:35 AM HADT · 14702 days ago · 33 km deep · 8 km away
18. 4.2118 km SSW of Atka, AlaskaSat, Jun 21, 10:38 PM HADT · 14703 days ago · 33 km deep · 22 km away
19. 4.665 km WSW of Atka, AlaskaSat, Jun 21, 9:03 PM HADT · 14703 days ago · 33 km deep · 64 km away
20. 4.887 km SW of Atka, AlaskaSat, Jun 21, 8:37 PM HADT · 14703 days ago · 33 km deep · 22 km away

From the USGS Earthquake Hazards Program and its partner networks, event usp0002w68. Read Tue, Sep 22, 2026, 9:39 PM UTC.