M4.4 earthquake 136 km ESE of Nikolski, Alaska

Magnitude

4.4 (mb), light

Local time

Tue, Jul 31, 2018, 1:08 AM AKDT

UTC

2018-07-31 09:08:57 UTC

Depth

9.6 km (6.0 mi), shallow

Epicenter

52.632° N, 166.897° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 4.9 km horizontally, 3.8 km in depth

Magnitude uncertainty

±0.04

Depth from

From location

Station coverage gap

171°

Stations used

228

• Unalaska, AlaskaPopulation 4,491. Forecast140 kmS

After

1. 3.3152 km ESE of Nikolski, AlaskaFri, Aug 3, 10:56 AM AKDT · 2980 days ago · 10 km deep · 21 km away
2. 2.5101 km E of Nikolski, AlaskaFri, Aug 3, 10:58 AM AKDT · 2980 days ago · 35 km deep · 36 km away
3. 2.682 km S of Unalaska, AlaskaSat, Aug 4, 12:04 PM AKDT · 2979 days ago · 26 km deep · 58 km away
4. 2.052 km SW of Unalaska, AlaskaSat, Aug 4, 2:10 PM AKDT · 2979 days ago · 67 km deep · 96 km away
5. 1.691 km SSW of Unalaska, AlaskaSun, Aug 5, 8:45 PM AKDT · 2978 days ago · 47 km deep · 62 km away
6. 1.868 km SSW of Unalaska, AlaskaMon, Aug 6, 9:20 AM AKDT · 2977 days ago · 64 km deep · 72 km away
7. 2.073 km SSW of Unalaska, AlaskaWed, Aug 8, 7:30 AM AKDT · 2975 days ago · 82 km deep · 73 km away
8. 1.991 km SSE of Unalaska, AlaskaThu, Aug 9, 2:38 PM AKDT · 2974 days ago · 13 km deep · 67 km away
9. 2.4111 km SSE of Nikolski, AlaskaFri, Aug 10, 2:44 PM AKDT · 2973 days ago · 22 km deep · 92 km away
10. 2.762 km SSW of Unalaska, AlaskaWed, Aug 15, 4:58 PM AKDT · 2968 days ago · 57 km deep · 78 km away
11. 1.891 km SSW of Unalaska, AlaskaFri, Aug 17, 2:37 AM AKDT · 2966 days ago · 30 km deep · 52 km away
12. 2.491 km SSE of Nikolski, AlaskaSat, Aug 18, 7:28 PM AKDT · 2965 days ago · 33 km deep · 96 km away
13. 1.737 km ESE of Nikolski, AlaskaTue, Aug 21, 4:40 AM AKDT · 2962 days ago · 50 km deep · 100 km away
14. 2.593 km SSW of Unalaska, AlaskaTue, Aug 21, 12:42 PM AKDT · 2962 days ago · 29 km deep · 52 km away
15. 2.3103 km S of Unalaska, AlaskaTue, Aug 21, 6:11 PM AKDT · 2962 days ago · 36 km deep · 37 km away
16. 2.067 km SSW of Unalaska, AlaskaWed, Aug 22, 3:24 AM AKDT · 2961 days ago · 46 km deep · 74 km away
17. 2.0147 km S of Unalaska, AlaskaWed, Aug 22, 7:27 PM AKDT · 2961 days ago · 18 km deep · 20 km away
18. 2.244 km ESE of Nikolski, AlaskaThu, Aug 23, 1:19 PM AKDT · 2960 days ago · 42 km deep · 93 km away
19. 2.354 km ESE of Nikolski, AlaskaThu, Aug 23, 1:29 PM AKDT · 2960 days ago · 24 km deep · 84 km away
20. 4.269 km E of Nikolski, AlaskaThu, Aug 23, 7:11 PM AKDT · 2960 days ago · 30 km deep · 71 km away
21. 4.179 km S of Unalaska, AlaskaSat, Aug 25, 3:46 AM AKDT · 2958 days ago · 39 km deep · 61 km away
22. 3.082 km SSW of Unalaska, AlaskaSat, Aug 25, 10:52 AM AKDT · 2958 days ago · 26 km deep · 62 km away
23. 2.289 km SSW of Unalaska, AlaskaSat, Aug 25, 10:55 AM AKDT · 2958 days ago · 26 km deep · 53 km away
24. 1.9147 km ESE of Nikolski, AlaskaSun, Aug 26, 7:24 AM AKDT · 2957 days ago · 17 km deep · 14 km away
25. 2.395 km SSW of Unalaska, AlaskaMon, Aug 27, 1:01 AM AKDT · 2956 days ago · 26 km deep · 52 km away
26. 2.144 km S of Unalaska, AlaskaTue, Aug 28, 4:44 AM AKDT · 2955 days ago · 58 km deep · 98 km away
27. 2.7123 km ESE of Nikolski, AlaskaTue, Aug 28, 5:14 AM AKDT · 2955 days ago · 35 km deep · 14 km away
28. 2.075 km SW of Unalaska, AlaskaTue, Aug 28, 4:36 PM AKDT · 2955 days ago · 26 km deep · 80 km away
29. 2.179 km S of Unalaska, AlaskaWed, Aug 29, 5:44 AM AKDT · 2954 days ago · 22 km deep · 61 km away
30. 2.673 km S of Unalaska, AlaskaThu, Aug 30, 3:49 PM AKDT · 2953 days ago · 35 km deep · 67 km away
31. 3.8198 km SSE of Unalaska, AlaskaFri, Aug 31, 3:32 AM AKDT · 2952 days ago · 10 km deep · 85 km away
32. 2.549 km ESE of Nikolski, AlaskaSun, Sep 2, 7:34 AM AKDT · 2950 days ago · 36 km deep · 87 km away
33. 1.6Fox Islands, Aleutian Islands, AlaskaMon, Sep 3, 2:22 AM AKDT · 2949 days ago · 25 km deep · 29 km away
34. 1.686 km SSW of Unalaska, AlaskaMon, Sep 3, 10:50 AM AKDT · 2949 days ago · 43 km deep · 60 km away
35. 1.6124 km ESE of Nikolski, AlaskaThu, Sep 6, 7:50 AM AKDT · 2946 days ago · 26 km deep · 13 km away
36. 1.778 km SW of Unalaska, AlaskaFri, Sep 7, 9:23 PM AKDT · 2945 days ago · 25 km deep · 90 km away
37. 1.791 km SSW of Unalaska, AlaskaSat, Sep 8, 6:08 PM AKDT · 2944 days ago · 35 km deep · 58 km away
38. 1.697 km SSW of Unalaska, AlaskaSun, Sep 9, 12:21 PM AKDT · 2943 days ago · 25 km deep · 60 km away
39. 1.579 km SW of Unalaska, AlaskaSun, Sep 9, 12:42 PM AKDT · 2943 days ago · 13 km deep · 84 km away
40. 2.184 km E of Nikolski, AlaskaMon, Sep 10, 12:42 AM AKDT · 2942 days ago · 34 km deep · 63 km away
41. 1.991 km SSW of Unalaska, AlaskaMon, Sep 10, 8:09 AM AKDT · 2942 days ago · 42 km deep · 50 km away
42. 2.781 km S of Unalaska, AlaskaTue, Sep 11, 3:43 AM AKDT · 2941 days ago · 28 km deep · 59 km away
43. 1.863 km SW of Unalaska, AlaskaTue, Sep 11, 2:03 PM AKDT · 2941 days ago · 13 km deep · 98 km away
44. 2.186 km E of Nikolski, AlaskaWed, Sep 12, 12:05 AM AKDT · 2940 days ago · 48 km deep · 58 km away
45. 2.777 km S of Unalaska, AlaskaWed, Sep 12, 2:59 AM AKDT · 2940 days ago · 26 km deep · 63 km away
46. 3.7111 km SSW of Unalaska, AlaskaMon, Sep 17, 12:58 AM AKDT · 2935 days ago · 31 km deep · 38 km away
47. 1.7109 km SSE of Unalaska, AlaskaTue, Sep 18, 11:35 PM AKDT · 2933 days ago · 23 km deep · 97 km away
48. 1.8158 km ESE of Nikolski, AlaskaWed, Sep 19, 11:56 AM AKDT · 2933 days ago · 25 km deep · 44 km away
49. 2.1175 km SSE of Unalaska, AlaskaSun, Sep 23, 10:59 PM AKDT · 2929 days ago · 13 km deep · 94 km away
50. 1.877 km SSW of Unalaska, AlaskaWed, Sep 26, 12:50 AM AKDT · 2926 days ago · 44 km deep · 63 km away
51. 1.656 km SW of Unalaska, AlaskaFri, Sep 28, 10:42 AM AKDT · 2924 days ago · 15 km deep · 99 km away

Before

1. 3.549 km ESE of Nikolski, AlaskaTue, Jul 31, 12:11 AM AKDT · 2983 days ago · 39 km deep · 89 km away
2. 2.468 km SSW of Unalaska, AlaskaSat, Jul 28, 4:23 PM AKDT · 2986 days ago · 38 km deep · 72 km away
3. 1.782 km SW of Unalaska, AlaskaSat, Jul 28, 3:59 AM AKDT · 2986 days ago · 13 km deep · 79 km away
4. 3.2174 km SSE of Unalaska, AlaskaFri, Jul 27, 3:24 PM AKDT · 2987 days ago · 10 km deep · 71 km away
5. 1.946 km ESE of Nikolski, AlaskaTue, Jul 24, 9:15 PM AKDT · 2990 days ago · 24 km deep · 90 km away
6. 2.284 km SSW of Unalaska, AlaskaTue, Jul 24, 10:02 AM AKDT · 2990 days ago · 40 km deep · 60 km away
7. 2.8194 km S of Unalaska, AlaskaTue, Jul 24, 4:12 AM AKDT · 2990 days ago · 10 km deep · 79 km away
8. 2.055 km ESE of Nikolski, AlaskaSun, Jul 22, 1:57 PM AKDT · 2992 days ago · 21 km deep · 82 km away
9. 1.6103 km E of Nikolski, AlaskaSun, Jul 22, 3:50 AM AKDT · 2992 days ago · 26 km deep · 38 km away
10. 3.157 km SE of Nikolski, AlaskaSun, Jul 22, 1:08 AM AKDT · 2992 days ago · 30 km deep · 85 km away
11. 1.790 km SW of Unalaska, AlaskaFri, Jul 20, 6:09 AM AKDT · 2994 days ago · 83 km deep · 86 km away
12. 2.141 km E of Nikolski, AlaskaWed, Jul 18, 12:58 PM AKDT · 2996 days ago · 53 km deep · 96 km away
13. 1.956 km SE of Nikolski, AlaskaWed, Jul 18, 9:23 AM AKDT · 2996 days ago · 22 km deep · 89 km away
14. 2.666 km SSW of Unalaska, AlaskaMon, Jul 16, 5:52 PM AKDT · 2998 days ago · 73 km deep · 84 km away
15. 1.967 km SSW of Unalaska, AlaskaMon, Jul 16, 1:58 AM AKDT · 2998 days ago · 47 km deep · 73 km away
16. 1.963 km SSE of Unalaska, AlaskaSun, Jul 15, 5:51 AM AKDT · 2999 days ago · 26 km deep · 89 km away
17. 3.3148 km SE of Nikolski, AlaskaSun, Jul 15, 3:30 AM AKDT · 2999 days ago · 28 km deep · 56 km away
18. 3.783 km SE of Nikolski, AlaskaSun, Jul 15, 12:16 AM AKDT · 2999 days ago · 10 km deep · 78 km away
19. 2.567 km S of Unalaska, AlaskaSat, Jul 14, 8:10 PM AKDT · 3000 days ago · 86 km deep · 73 km away
20. 1.967 km S of Unalaska, AlaskaWed, Jul 11, 5:34 AM AKDT · 3003 days ago · 26 km deep · 77 km away

From the USGS Earthquake Hazards Program and its partner networks, event us2000gi0k (also filed as ak19995835, ak0189qrcba9). Read Wed, Sep 30, 2026, 6:30 PM UTC.