M3.9 earthquake 224 km WSW of Adak, Alaska

Magnitude

3.9 (mb), minor

Local time

Mon, Mar 29, 2021, 2:20 PM HADT

UTC

2021-03-29 23:20:36 UTC

Depth

51.0 km (31.7 mi), shallow

Epicenter

51.346° N, 179.764° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 13.4 km horizontally, 14.3 km in depth

Magnitude uncertainty

±0.09

Depth from

From location

Station coverage gap

219°, poorly surrounded by stations

Stations used

36

After

1. 3.1181 km WSW of Adak, AlaskaTue, Mar 30, 12:03 PM HADT · 2004 days ago · 35 km deep · 61 km away
2. 2.2203 km WSW of Adak, AKSun, Apr 4, 3:05 PM HADT · 1999 days ago · 66 km deep · 22 km away
3. 3.1127 km WSW of Adak, AlaskaMon, Apr 5, 4:55 AM HADT · 1998 days ago · 10 km deep · 97 km away
4. 3.2141 km WSW of Adak, AlaskaMon, Apr 5, 4:58 AM HADT · 1998 days ago · 10 km deep · 85 km away
5. 2.7212 km WSW of Adak, AlaskaTue, Apr 6, 9:49 AM HADT · 1997 days ago · 113 km deep · 22 km away
6. 3.3229 km WSW of Adak, AlaskaFri, Apr 9, 8:08 AM HADT · 1994 days ago · 56 km deep · 20 km away
7. 3.0204 km WSW of Adak, AlaskaFri, Apr 16, 2:11 PM HADT · 1987 days ago · 13 km deep · 64 km away
8. 2.3224 km WSW of Adak, AlaskaSat, Apr 17, 2:37 PM HADT · 1986 days ago · 69 km deep · 48 km away
9. 1.7135 km W of Adak, AlaskaSat, Apr 17, 5:15 PM HADT · 1985 days ago · 19 km deep · 96 km away
10. 2.4252 km W of Adak, AlaskaSun, Apr 18, 6:26 PM GMT+12 · 1985 days ago · 71 km deep · 71 km away
11. 1.5134 km W of Adak, AlaskaSun, Apr 18, 7:51 PM HADT · 1984 days ago · 6 km deep · 91 km away
12. 2.7178 km WSW of Adak, AKSun, Apr 18, 9:33 PM HADT · 1984 days ago · 33 km deep · 68 km away
13. 1.6169 km WSW of Adak, AlaskaMon, Apr 19, 9:48 AM HADT · 1984 days ago · 32 km deep · 55 km away
14. 1.9150 km WSW of Adak, AlaskaWed, Apr 21, 4:38 AM HADT · 1982 days ago · 28 km deep · 89 km away
15. 2.0192 km WSW of Adak, AlaskaWed, Apr 21, 4:57 PM HADT · 1981 days ago · 18 km deep · 36 km away
16. 1.9165 km WSW of Adak, AlaskaThu, Apr 22, 5:35 AM HADT · 1981 days ago · 16 km deep · 60 km away
17. 2.8268 km WSW of Adak, AlaskaFri, Apr 23, 9:36 AM GMT+12 · 1981 days ago · 18 km deep · 43 km away
18. 1.7176 km WSW of Adak, AlaskaFri, Apr 23, 5:15 AM HADT · 1980 days ago · 69 km deep · 56 km away
19. 3.0197 km WSW of Adak, AlaskaSat, Apr 24, 8:16 PM HADT · 1978 days ago · 35 km deep · 58 km away
20. 3.7248 km WSW of Adak, AlaskaTue, Apr 27, 10:16 PM GMT+12 · 1976 days ago · 58 km deep · 32 km away
21. 1.8166 km W of Adak, AlaskaTue, Apr 27, 12:12 PM HADT · 1976 days ago · 11 km deep · 69 km away
22. 1.5125 km WSW of Adak, AlaskaTue, Apr 27, 1:06 PM HADT · 1976 days ago · 13 km deep · 99 km away
23. 2.2145 km W of Adak, AlaskaTue, Apr 27, 2:35 PM HADT · 1976 days ago · 165 km deep · 80 km away
24. 2.0138 km WSW of Adak, AlaskaThu, Apr 29, 1:08 AM HADT · 1974 days ago · 26 km deep · 95 km away
25. 2.0181 km WSW of Adak, AlaskaMon, May 3, 7:28 PM HADT · 1969 days ago · 20 km deep · 47 km away
26. 1.8131 km WSW of Adak, AlaskaTue, May 4, 3:42 AM HADT · 1969 days ago · 13 km deep · 92 km away
27. 2.0148 km WSW of Adak, AlaskaWed, May 5, 4:08 AM HADT · 1968 days ago · 9 km deep · 78 km away
28. 3.8154 km WSW of Adak, AlaskaWed, May 5, 4:34 AM HADT · 1968 days ago · 15 km deep · 78 km away
29. 1.9169 km WSW of Adak, AlaskaSat, May 8, 11:24 AM HADT · 1965 days ago · 13 km deep · 59 km away
30. 3.8261 km W of Adak, AlaskaThu, May 13, 3:10 AM GMT+12 · 1961 days ago · 178 km deep · 88 km away
31. 3.4202 km WSW of Adak, AlaskaThu, May 13, 4:31 PM HADT · 1959 days ago · 27 km deep · 32 km away
32. 1.8131 km WSW of Adak, AlaskaThu, May 13, 10:11 PM HADT · 1959 days ago · 12 km deep · 93 km away
33. 2.1184 km WSW of Adak, AlaskaFri, May 14, 3:18 AM HADT · 1959 days ago · 23 km deep · 50 km away
34. 1.5131 km WSW of Adak, AlaskaMon, May 17, 3:49 AM HADT · 1956 days ago · 5 km deep · 93 km away
35. 2.9172 km W of Adak, AlaskaMon, May 17, 5:42 AM HADT · 1956 days ago · 10 km deep · 63 km away
36. 5.4288 km WSW of Adak, AlaskaTue, May 18, 8:25 AM GMT+12 · 1956 days ago · 31 km deep · 64 km away · felt by 2 · tsunami flag
37. 3.3290 km WSW of Adak, AlaskaTue, May 18, 12:58 PM GMT+12 · 1956 days ago · 20 km deep · 73 km away
38. 3.3284 km WSW of Adak, AlaskaTue, May 18, 2:05 PM GMT+12 · 1955 days ago · 16 km deep · 59 km away
39. 3.4294 km WSW of Adak, AlaskaTue, May 18, 2:09 PM GMT+12 · 1955 days ago · 28 km deep · 72 km away
40. 5.0286 km WSW of Adak, AlaskaTue, May 18, 5:39 PM GMT+12 · 1955 days ago · 43 km deep · 62 km away
41. 1.6141 km WSW of Adak, AlaskaFri, May 21, 3:15 AM HADT · 1952 days ago · 23 km deep · 83 km away
42. 2.0157 km WSW of Adak, AlaskaFri, May 21, 11:06 PM HADT · 1951 days ago · 15 km deep · 74 km away
43. 3.1144 km W of Adak, AlaskaSun, May 23, 12:06 PM HADT · 1950 days ago · 81 km deep · 81 km away
44. 1.5125 km WSW of Adak, AlaskaTue, May 25, 11:51 PM HADT · 1947 days ago · 15 km deep · 99 km away
45. 2.7154 km W of Adak, AlaskaThu, May 27, 11:33 AM HADT · 1946 days ago · 90 km deep · 72 km away

Before

1. 3.1207 km WSW of Adak, AlaskaSat, Mar 27, 7:40 PM HADT · 2006 days ago · 10 km deep · 58 km away
2. 1.7126 km WSW of Adak, AlaskaThu, Mar 25, 6:59 AM HADT · 2009 days ago · 28 km deep · 98 km away
3. 1.9159 km WSW of Adak, AlaskaWed, Mar 24, 11:52 PM HADT · 2009 days ago · 19 km deep · 82 km away
4. 3.5237 km W of Adak, AlaskaWed, Mar 24, 5:42 AM HADT · 2010 days ago · 90 km deep · 36 km away
5. 1.9148 km WSW of Adak, AlaskaTue, Mar 23, 1:04 AM HADT · 2011 days ago · 30 km deep · 76 km away
6. 2.2151 km WSW of Adak, AlaskaMon, Mar 22, 1:40 PM HADT · 2012 days ago · 17 km deep · 73 km away
7. 3.1224 km W of Adak, AlaskaSun, Mar 21, 12:10 AM HADT · 2013 days ago · 128 km deep · 48 km away
8. 2.2188 km WSW of Adak, AlaskaWed, Mar 17, 7:23 AM HADT · 2017 days ago · 6 km deep · 42 km away
9. 1.9130 km WSW of Adak, AlaskaTue, Mar 16, 11:11 AM HADT · 2018 days ago · 58 km deep · 94 km away
10. 1.9133 km WSW of Adak, AlaskaTue, Mar 16, 4:29 AM HADT · 2018 days ago · 4 km deep · 90 km away
11. 2.1140 km WSW of Adak, AlaskaMon, Mar 15, 7:59 PM HADT · 2018 days ago · 21 km deep · 98 km away
12. 3.3Andreanof Islands, Aleutian Islands, AlaskaSun, Mar 14, 4:18 AM HADT · 2020 days ago · 35 km deep · 22 km away
13. 1.5133 km W of Adak, AlaskaThu, Mar 11, 6:13 AM HAST · 2023 days ago · 7 km deep · 92 km away
14. 4.3225 km W of Adak, AlaskaWed, Mar 10, 7:46 PM HAST · 2023 days ago · 158 km deep · 71 km away
15. 3.3190 km WSW of Adak, AlaskaWed, Mar 10, 3:12 PM HAST · 2024 days ago · 68 km deep · 35 km away
16. 2.1179 km WSW of Adak, AlaskaWed, Mar 10, 11:00 AM HAST · 2024 days ago · 20 km deep · 50 km away
17. 1.7176 km W of Adak, AlaskaWed, Mar 10, 3:33 AM HAST · 2024 days ago · 14 km deep · 61 km away
18. 1.8133 km WSW of Adak, AlaskaWed, Mar 10, 2:10 AM HAST · 2024 days ago · 36 km deep · 97 km away
19. 1.8152 km WSW of Adak, AlaskaTue, Mar 9, 8:20 PM HAST · 2024 days ago · 20 km deep · 91 km away
20. 1.9148 km SW of Adak, AlaskaMon, Mar 8, 9:15 PM HAST · 2025 days ago · 21 km deep · 96 km away

From the USGS Earthquake Hazards Program and its partner networks, event us6000dznn. Read Thu, Sep 24, 2026, 12:50 PM UTC.