M3.5 earthquake 54 km ESE of Nikolski, Alaska

Magnitude

3.5 (mb), minor

Local time

Wed, Jan 20, 2021, 3:16 AM AKST

UTC

2021-01-20 12:16:38 UTC

Depth

41.0 km (25.5 mi), shallow

Epicenter

52.733° N, 168.124° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 2.9 km horizontally, 13.0 km in depth

Magnitude uncertainty

±0.12

Depth from

From location

Station coverage gap

207°, poorly surrounded by stations

Stations used

71

• Unalaska, AlaskaPopulation 4,491. Forecast165 kmSW

After

1. 2.387 km SSE of Nikolski, AlaskaThu, Jan 21, 3:24 PM AKST · 2071 days ago · 39 km deep · 60 km away
2. 2.349 km WSW of Nikolski, AlaskaFri, Jan 22, 5:22 AM AKST · 2071 days ago · 16 km deep · 98 km away
3. 1.892 km E of Nikolski, AlaskaFri, Jan 22, 5:35 AM AKST · 2071 days ago · 22 km deep · 48 km away
4. 1.585 km SSW of Unalaska, AlaskaSun, Jan 24, 9:10 AM AKST · 2068 days ago · 5 km deep · 88 km away
5. 2.9106 km SSE of Nikolski, AlaskaTue, Jan 26, 6:32 AM AKST · 2066 days ago · 10 km deep · 84 km away
6. 1.993 km E of Nikolski, AlaskaWed, Jan 27, 11:05 AM AKST · 2065 days ago · 31 km deep · 51 km away
7. 3.347 km ESE of Nikolski, AlaskaSat, Jan 30, 3:09 AM AKST · 2063 days ago · 35 km deep · 8 km away
8. 2.939 km SW of Nikolski, AlaskaSun, Jan 31, 10:38 PM AKST · 2061 days ago · 69 km deep · 81 km away
9. 3.195 km E of Nikolski, AlaskaTue, Feb 2, 7:52 AM AKST · 2059 days ago · 35 km deep · 46 km away
10. 1.596 km SSW of Unalaska, AlaskaWed, Feb 3, 4:36 PM AKST · 2058 days ago · 25 km deep · 76 km away
11. 1.987 km ENE of Nikolski, AlaskaSun, Feb 7, 12:49 AM AKST · 2055 days ago · 73 km deep · 71 km away
12. 2.890 km SSW of Unalaska, AlaskaMon, Feb 8, 2:36 AM AKST · 2054 days ago · 26 km deep · 85 km away
13. 3.988 km SSW of Unalaska, AlaskaMon, Feb 8, 3:34 AM AKST · 2054 days ago · 44 km deep · 84 km away
14. 1.688 km SSW of Unalaska, AlaskaTue, Feb 9, 4:16 AM AKST · 2053 days ago · 26 km deep · 86 km away
15. 1.677 km SW of Unalaska, AlaskaTue, Feb 9, 9:10 PM AKST · 2052 days ago · 13 km deep · 88 km away
16. 3.2108 km ESE of Nikolski, AlaskaWed, Feb 10, 12:46 AM AKST · 2052 days ago · 17 km deep · 54 km away
17. 3.245 km SE of Nikolski, AlaskaWed, Feb 10, 11:30 AM AKST · 2051 days ago · 35 km deep · 13 km away
18. 1.885 km E of Nikolski, AlaskaFri, Feb 12, 10:14 AM AKST · 2049 days ago · 10 km deep · 43 km away
19. 2.476 km SSW of Nikolski, AlaskaTue, Feb 16, 12:39 PM AKST · 2045 days ago · 9 km deep · 99 km away
20. 2.736 km SE of Nikolski, AlaskaWed, Feb 17, 6:44 PM AKST · 2044 days ago · 35 km deep · 20 km away
21. 1.831 km E of Nikolski, AlaskaThu, Feb 18, 6:28 PM AKST · 2043 days ago · 62 km deep · 32 km away
22. 1.584 km SW of Unalaska, AlaskaSat, Feb 20, 5:48 PM AKST · 2041 days ago · 14 km deep · 82 km away
23. 2.1118 km S of Unalaska, AlaskaTue, Feb 23, 4:05 PM AKST · 2038 days ago · 6 km deep · 91 km away
24. 2.1135 km S of Unalaska, AlaskaTue, Feb 23, 11:22 PM AKST · 2038 days ago · 37 km deep · 97 km away
25. 2.7Fox Islands, Aleutian Islands, AlaskaWed, Feb 24, 2:09 AM AKST · 2038 days ago · 20 km deep · 92 km away
26. 3.1133 km S of Unalaska, AlaskaWed, Feb 24, 2:45 AM AKST · 2038 days ago · 29 km deep · 93 km away
27. 3.287 km S of Nikolski, AlaskaWed, Feb 24, 7:23 AM AKST · 2037 days ago · 35 km deep · 90 km away
28. 3.072 km S of Nikolski, AlaskaThu, Feb 25, 1:58 AM AKST · 2037 days ago · 10 km deep · 76 km away
29. 3.279 km SSW of Unalaska, AlaskaSat, Feb 27, 8:43 AM AKST · 2034 days ago · 10 km deep · 90 km away
30. 2.167 km ESE of Nikolski, AlaskaSun, Feb 28, 2:51 PM AKST · 2033 days ago · 16 km deep · 15 km away
31. 3.746 km ESE of Nikolski, AlaskaSun, Mar 7, 10:42 PM AKST · 2026 days ago · 44 km deep · 11 km away
32. 2.4136 km S of Unalaska, AlaskaMon, Mar 8, 1:31 AM AKST · 2026 days ago · 5 km deep · 87 km away
33. 2.9102 km SSW of Unalaska, AlaskaMon, Mar 8, 11:45 PM AKST · 2025 days ago · 35 km deep · 90 km away
34. 3.070 km SSW of Nikolski, AlaskaWed, Mar 10, 12:28 AM AKST · 2024 days ago · 35 km deep · 91 km away
35. 2.563 km SSW of Nikolski, AlaskaThu, Mar 11, 8:24 AM AKST · 2022 days ago · 35 km deep · 90 km away
36. 2.1146 km ESE of Nikolski, AlaskaFri, Mar 12, 7:20 PM AKST · 2021 days ago · 26 km deep · 92 km away
37. 3.379 km SSE of Nikolski, AlaskaSat, Mar 13, 9:40 AM AKST · 2020 days ago · 17 km deep · 56 km away
38. 3.388 km SSE of Nikolski, AlaskaSat, Mar 13, 4:52 PM AKST · 2020 days ago · 10 km deep · 63 km away
39. 3.259 km ESE of Nikolski, AlaskaTue, Mar 16, 7:45 AM AKDT · 2017 days ago · 28 km deep · 7 km away
40. 1.986 km SSW of Unalaska, AlaskaTue, Mar 16, 11:25 AM AKDT · 2017 days ago · 26 km deep · 87 km away
41. 3.191 km SSE of Nikolski, AlaskaTue, Mar 16, 6:33 PM AKDT · 2017 days ago · 10 km deep · 55 km away
42. 1.988 km ENE of Nikolski, AlaskaSat, Mar 20, 1:53 AM AKDT · 2014 days ago · 55 km deep · 59 km away

Before

1. 1.995 km SW of Unalaska, AlaskaTue, Jan 19, 7:16 PM AKST · 2073 days ago · 64 km deep · 70 km away
2. 2.573 km E of Nikolski, AlaskaMon, Jan 18, 11:37 AM AKST · 2074 days ago · 35 km deep · 25 km away
3. 2.848 km ESE of Nikolski, AlaskaSun, Jan 17, 3:35 PM AKST · 2075 days ago · 35 km deep · 6 km away
4. 3.035 km SE of Nikolski, AlaskaSat, Jan 16, 9:28 AM AKST · 2076 days ago · 35 km deep · 22 km away
5. 3.246 km ESE of Nikolski, AlaskaThu, Jan 14, 6:04 PM AKST · 2078 days ago · 33 km deep · 10 km away
6. 1.943 km WSW of Nikolski, AlaskaWed, Jan 13, 6:16 PM AKST · 2079 days ago · 3 km deep · 93 km away
7. 2.796 km SSW of Unalaska, AlaskaWed, Jan 13, 12:42 AM AKST · 2080 days ago · 32 km deep · 80 km away
8. 2.945 km ESE of Nikolski, AlaskaMon, Jan 11, 1:08 PM AKST · 2081 days ago · 35 km deep · 10 km away
9. 2.074 km E of Nikolski, AlaskaSun, Jan 10, 10:20 AM AKST · 2082 days ago · 25 km deep · 34 km away
10. 2.883 km NE of Nikolski, AlaskaSat, Jan 9, 9:54 PM AKST · 2083 days ago · 94 km deep · 79 km away
11. 2.556 km NNE of Nikolski, AlaskaSat, Jan 9, 4:50 PM AKST · 2083 days ago · 130 km deep · 80 km away
12. 2.238 km NE of Nikolski, AlaskaSat, Jan 9, 2:08 AM AKST · 2084 days ago · 70 km deep · 54 km away
13. 4.336 km E of Nikolski, AlaskaFri, Jan 8, 8:22 PM AKST · 2084 days ago · 47 km deep · 25 km away
14. 3.249 km ESE of Nikolski, AlaskaFri, Jan 8, 8:14 PM AKST · 2084 days ago · 34 km deep · 5 km away
15. 2.187 km SE of Nikolski, AlaskaThu, Jan 7, 3:56 PM AKST · 2085 days ago · 4 km deep · 38 km away
16. 3.362 km SE of Nikolski, AlaskaWed, Jan 6, 5:41 PM AKST · 2086 days ago · 35 km deep · 32 km away
17. 2.792 km E of Nikolski, AlaskaTue, Jan 5, 10:25 AM AKST · 2087 days ago · 84 km deep · 55 km away
18. 2.938 km SW of Nikolski, AlaskaSun, Jan 3, 7:28 PM AKST · 2089 days ago · 9 km deep · 77 km away
19. 1.676 km SW of Unalaska, AlaskaSat, Jan 2, 11:11 AM AKST · 2090 days ago · 7 km deep · 93 km away
20. 3.261 km E of Nikolski, AlaskaSat, Jan 2, 1:27 AM AKST · 2091 days ago · 29 km deep · 20 km away

From the USGS Earthquake Hazards Program and its partner networks, event us6000dcnv (also filed as ak021x9zniu). Read Thu, Sep 24, 2026, 2:16 AM UTC.