M3.3 earthquake 105 km S of Atka, Alaska

Magnitude

3.3 (ML, local (Richter)), minor

Magnitude from

AV

Local time

Fri, Jul 20, 2018, 9:13 AM HADT

UTC

2018-07-20 18:13:34 UTC

Depth

8.3 km (5.2 mi), shallow

Epicenter

51.257° N, 174.423° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 46.4 km horizontally, 53.7 km in depth

Magnitude uncertainty

±0.09

Depth from

Operator assigned

Station coverage gap

333°, poorly surrounded by stations

Stations used

11

After

1. 2.561 km S of Atka, AlaskaSat, Jul 21, 5:35 PM HADT · 2994 days ago · 14 km deep · 49 km away
2. 2.0111 km SSW of Atka, AlaskaTue, Jul 24, 9:01 AM HADT · 2991 days ago · 21 km deep · 27 km away
3. 2.371 km SSE of Atka, AlaskaTue, Jul 24, 9:55 AM HADT · 2991 days ago · 14 km deep · 66 km away
4. 1.765 km SW of Atka, AlaskaWed, Jul 25, 8:44 PM HADT · 2990 days ago · 42 km deep · 66 km away
5. 2.3147 km S of Atka, AlaskaSat, Jul 28, 9:10 AM HADT · 2987 days ago · 28 km deep · 53 km away
6. 2.778 km SSE of Atka, AlaskaSat, Jul 28, 4:15 PM HADT · 2987 days ago · 10 km deep · 58 km away
7. 4.191 km S of Atka, AlaskaMon, Jul 30, 8:55 PM HADT · 2985 days ago · 40 km deep · 36 km away
8. 4.685 km SE of Atka, AlaskaMon, Aug 6, 8:05 AM HADT · 2978 days ago · 43 km deep · 84 km away
9. 2.444 km S of Atka, AlaskaMon, Aug 6, 6:31 PM HADT · 2978 days ago · 27 km deep · 61 km away
10. 2.3146 km SE of Adak, AlaskaTue, Aug 7, 7:39 PM HADT · 2977 days ago · 35 km deep · 81 km away
11. 2.675 km SSE of Atka, AlaskaWed, Aug 8, 7:25 PM HADT · 2976 days ago · 28 km deep · 62 km away
12. 1.997 km ESE of Adak, AlaskaThu, Aug 9, 2:02 AM HADT · 2975 days ago · 37 km deep · 72 km away
13. 3.059 km SSW of Atka, AlaskaThu, Aug 9, 12:15 PM HADT · 2975 days ago · 35 km deep · 49 km away
14. 1.673 km SW of Atka, AlaskaSat, Aug 11, 4:07 AM HADT · 2973 days ago · 19 km deep · 63 km away
15. 2.193 km SSE of Atka, AlaskaSun, Aug 12, 1:59 PM HADT · 2972 days ago · 26 km deep · 43 km away
16. 2.4104 km ESE of Adak, AlaskaSun, Aug 12, 10:59 PM HADT · 2972 days ago · 31 km deep · 64 km away
17. 4.116 km SSE of Atka, AlaskaTue, Aug 14, 12:00 PM HADT · 2970 days ago · 7 km deep · 91 km away
18. 2.476 km SE of Adak, AlaskaWed, Aug 15, 2:47 PM HADT · 2969 days ago · 19 km deep · 95 km away
19. 2.2109 km SSW of Atka, AlaskaThu, Aug 16, 3:04 AM HADT · 2968 days ago · 49 km deep · 37 km away
20. 3.3187 km S of Atka, AlaskaThu, Aug 16, 11:50 AM HADT · 2968 days ago · 10 km deep · 83 km away
21. 1.981 km SW of Atka, AlaskaFri, Aug 17, 5:10 PM HADT · 2967 days ago · 34 km deep · 74 km away
22. 2.6152 km S of Atka, AlaskaSun, Aug 19, 1:15 AM HADT · 2966 days ago · 10 km deep · 64 km away
23. 2.332 km SSW of Atka, AlaskaSun, Aug 19, 2:17 PM HADT · 2965 days ago · 81 km deep · 77 km away
24. 2.173 km SE of Adak, AlaskaSun, Aug 19, 11:11 PM HADT · 2965 days ago · 21 km deep · 97 km away
25. 1.8Andreanof Islands, Aleutian Islands, AlaskaSat, Aug 25, 10:40 AM HADT · 2959 days ago · 4 km deep · 58 km away
26. 2.0Andreanof Islands, Aleutian Islands, AlaskaSat, Aug 25, 5:37 PM HADT · 2959 days ago · 26 km deep · 56 km away
27. 2.073 km ESE of Adak, AlaskaSat, Aug 25, 10:13 PM HADT · 2959 days ago · 47 km deep · 95 km away
28. 2.921 km SSW of Atka, AlaskaSun, Aug 26, 9:35 AM HADT · 2958 days ago · 72 km deep · 84 km away
29. 3.989 km S of Atka, AlaskaTue, Aug 28, 10:00 AM HADT · 2956 days ago · 50 km deep · 31 km away
30. 4.296 km S of Atka, AlaskaTue, Aug 28, 10:37 AM HADT · 2956 days ago · 51 km deep · 35 km away
31. 2.345 km SSW of Atka, AlaskaFri, Aug 31, 11:39 AM HADT · 2953 days ago · 46 km deep · 64 km away
32. 2.678 km SE of Atka, AlaskaSun, Sep 2, 8:40 AM HADT · 2951 days ago · 35 km deep · 83 km away
33. 2.3168 km SSE of Atka, AlaskaSun, Sep 2, 3:44 PM HADT · 2951 days ago · 0 km deep · 81 km away
34. 2.433 km S of Atka, AlaskaTue, Sep 4, 3:30 PM HADT · 2949 days ago · 63 km deep · 72 km away
35. 1.735 km SW of Atka, AlaskaThu, Sep 6, 6:40 AM HADT · 2947 days ago · 63 km deep · 83 km away
36. 2.233 km SW of Atka, AlaskaFri, Sep 7, 1:49 PM HADT · 2946 days ago · 56 km deep · 79 km away
37. 1.678 km E of Adak, AlaskaSat, Sep 8, 4:08 AM HADT · 2945 days ago · 66 km deep · 95 km away
38. 2.136 km SSW of Atka, AlaskaSat, Sep 8, 5:22 AM HADT · 2945 days ago · 29 km deep · 69 km away
39. 2.853 km S of Atka, AlaskaSun, Sep 9, 1:48 PM HADT · 2944 days ago · 9 km deep · 56 km away
40. 1.949 km SSE of Atka, AlaskaMon, Sep 10, 7:05 AM HADT · 2943 days ago · 45 km deep · 71 km away
41. 4.139 km S of Atka, AlaskaFri, Sep 14, 5:46 PM HADT · 2939 days ago · 75 km deep · 69 km away
42. 2.175 km SSE of Atka, AlaskaSat, Sep 15, 12:24 AM HADT · 2939 days ago · 24 km deep · 56 km away
43. 2.339 km S of Atka, AlaskaSat, Sep 15, 8:56 AM HADT · 2938 days ago · 42 km deep · 66 km away
44. 2.487 km SSE of Atka, AlaskaSat, Sep 15, 11:36 PM HADT · 2938 days ago · 23 km deep · 60 km away
45. 2.821 km S of Atka, AlaskaSun, Sep 16, 4:11 AM HADT · 2937 days ago · 56 km deep · 84 km away
46. 2.0122 km SSW of Atka, AlaskaSun, Sep 16, 1:17 PM HADT · 2937 days ago · 15 km deep · 48 km away
47. 1.727 km SW of Atka, AlaskaMon, Sep 17, 11:18 PM HADT · 2936 days ago · 61 km deep · 88 km away

Before

1. 1.7126 km SSW of Atka, AlaskaFri, Jul 20, 8:25 AM HADT · 2995 days ago · 18 km deep · 41 km away
2. 3.646 km SSE of Atka, AlaskaThu, Jul 19, 12:09 PM HADT · 2996 days ago · 51 km deep · 76 km away
3. 2.094 km SW of Atka, AlaskaThu, Jul 19, 3:25 AM HADT · 2996 days ago · 26 km deep · 62 km away
4. 1.657 km SW of Atka, AlaskaTue, Jul 17, 11:00 PM HADT · 2998 days ago · 57 km deep · 79 km away
5. 1.844 km S of Atka, AlaskaTue, Jul 17, 6:10 AM HADT · 2998 days ago · 16 km deep · 61 km away
6. 2.9102 km ESE of Adak, AlaskaMon, Jul 16, 7:47 PM HADT · 2999 days ago · 51 km deep · 66 km away
7. 1.867 km SSW of Atka, AlaskaMon, Jul 16, 2:56 PM HADT · 2999 days ago · 26 km deep · 39 km away
8. 2.419 km SSW of Atka, AlaskaMon, Jul 16, 1:11 PM HADT · 2999 days ago · 103 km deep · 88 km away
9. 2.394 km S of Atka, AlaskaSun, Jul 15, 6:13 PM HADT · 3000 days ago · 8 km deep · 15 km away
10. 2.7185 km SSE of Atka, AlaskaSun, Jul 15, 4:47 AM HADT · 3000 days ago · 10 km deep · 99 km away
11. 2.6162 km S of Atka, AlaskaFri, Jul 13, 10:03 AM HADT · 3002 days ago · 10 km deep · 63 km away
12. 2.155 km WSW of Atka, AlaskaThu, Jul 12, 8:14 AM HADT · 3003 days ago · 71 km deep · 98 km away
13. 1.733 km S of Atka, AlaskaThu, Jul 12, 4:44 AM HADT · 3003 days ago · 53 km deep · 74 km away
14. 2.2108 km SSW of Atka, AlaskaWed, Jul 11, 11:35 PM HADT · 3004 days ago · 12 km deep · 40 km away
15. 2.369 km SSE of Atka, AlaskaWed, Jul 11, 12:48 PM HADT · 3004 days ago · 4 km deep · 61 km away
16. 1.961 km SSE of Atka, AlaskaWed, Jul 11, 11:24 AM HADT · 3004 days ago · 40 km deep · 61 km away
17. 2.314 km S of Atka, AlaskaMon, Jul 9, 9:29 PM HADT · 3006 days ago · 190 km deep · 91 km away
18. 3.794 km SSW of Atka, AlaskaMon, Jul 9, 3:02 AM HADT · 3006 days ago · 35 km deep · 22 km away
19. 2.9100 km SSW of Atka, AlaskaSun, Jul 8, 6:40 PM HADT · 3007 days ago · 34 km deep · 13 km away
20. 5.297 km SSW of Atka, AlaskaSun, Jul 8, 5:42 PM HADT · 3007 days ago · 18 km deep · 20 km away

From the USGS Earthquake Hazards Program and its partner networks, event av61747336. Read Thu, Oct 1, 2026, 10:24 PM UTC.