M3.9 earthquake 149 km S of False Pass, Alaska

Magnitude

3.9 (mb), minor

Local time

Thu, Apr 22, 2021, 3:25 PM AKDT

UTC

2021-04-22 23:25:05 UTC

Depth

18.0 km (11.2 mi), shallow

Epicenter

53.510° N, 163.418° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 5.5 km horizontally, 5.4 km in depth

Magnitude uncertainty

±0.07

Depth from

From location

Station coverage gap

165°

Stations used

77

• Akutan, AlaskaPopulation 1,040. Forecast170 kmESE

After

1. 3.0152 km S of False Pass, AlaskaThu, Apr 22, 3:50 PM AKDT · 1979 days ago · 10 km deep · 3 km away
2. 3.5100 km ESE of Akutan, AlaskaThu, Apr 22, 11:49 PM AKDT · 1979 days ago · 19 km deep · 73 km away
3. 2.8118 km ESE of Akutan, AlaskaFri, Apr 23, 3:40 AM AKDT · 1979 days ago · 35 km deep · 52 km away
4. 2.6160 km S of False Pass, AlaskaFri, Apr 23, 1:31 PM AKDT · 1979 days ago · 10 km deep · 11 km away
5. 2.798 km SSE of False Pass, AlaskaFri, Apr 23, 5:51 PM AKDT · 1978 days ago · 10 km deep · 67 km away
6. 2.8151 km S of False Pass, AlaskaSat, Apr 24, 5:22 PM AKDT · 1977 days ago · 10 km deep · 14 km away
7. 2.2154 km SE of Akutan, AlaskaSat, Apr 24, 8:17 PM AKDT · 1977 days ago · 5 km deep · 85 km away
8. 1.9141 km SE of Akutan, AlaskaSun, Apr 25, 7:40 AM AKDT · 1977 days ago · 15 km deep · 78 km away
9. 1.9121 km SE of Akutan, AlaskaSun, Apr 25, 4:48 PM AKDT · 1976 days ago · 51 km deep · 80 km away
10. 1.7100 km ESE of Akutan, AlaskaMon, Apr 26, 3:01 AM AKDT · 1976 days ago · 38 km deep · 76 km away
11. 1.899 km ESE of Akutan, AlaskaMon, Apr 26, 5:42 AM AKDT · 1976 days ago · 26 km deep · 76 km away
12. 2.1106 km ESE of Akutan, AlaskaMon, Apr 26, 3:45 PM AKDT · 1975 days ago · 43 km deep · 64 km away
13. 2.0Unimak Island region, AlaskaTue, Apr 27, 4:21 AM AKDT · 1975 days ago · 40 km deep · 56 km away
14. 2.7165 km ESE of Akutan, AlaskaTue, Apr 27, 3:33 PM AKDT · 1974 days ago · 20 km deep · 23 km away
15. 2.2Unimak Island region, AlaskaTue, Apr 27, 7:52 PM AKDT · 1974 days ago · 38 km deep · 63 km away
16. 2.0114 km ESE of Akutan, AlaskaTue, Apr 27, 10:50 PM AKDT · 1974 days ago · 26 km deep · 57 km away
17. 2.0105 km ESE of Akutan, AlaskaWed, Apr 28, 4:15 AM AKDT · 1974 days ago · 67 km deep · 72 km away
18. 2.1114 km ESE of Akutan, AlaskaWed, Apr 28, 4:17 AM AKDT · 1974 days ago · 26 km deep · 57 km away
19. 1.987 km ESE of Akutan, AlaskaWed, Apr 28, 7:13 AM AKDT · 1974 days ago · 50 km deep · 85 km away
20. 2.597 km SSE of False Pass, AlaskaThu, Apr 29, 5:27 AM AKDT · 1973 days ago · 7 km deep · 79 km away
21. 2.8133 km SE of Akutan, AlaskaMon, May 3, 9:40 AM AKDT · 1969 days ago · 10 km deep · 88 km away
22. 3.384 km SSE of False Pass, AlaskaSun, May 9, 11:43 AM AKDT · 1963 days ago · 13 km deep · 84 km away
23. 3.5156 km SSE of False Pass, AlaskaWed, May 12, 1:34 AM AKDT · 1960 days ago · 10 km deep · 36 km away
24. 3.6148 km SSE of False Pass, AlaskaThu, May 13, 12:10 AM AKDT · 1959 days ago · 10 km deep · 39 km away
25. 2.191 km SE of Akutan, AlaskaFri, May 14, 3:03 AM AKDT · 1958 days ago · 37 km deep · 89 km away
26. 2.7110 km ESE of Akutan, AlaskaSun, May 16, 5:29 AM AKDT · 1956 days ago · 34 km deep · 60 km away
27. 1.773 km ESE of Akutan, AlaskaMon, May 17, 12:17 AM AKDT · 1955 days ago · 32 km deep · 97 km away
28. 2.6206 km SSE of False Pass, AlaskaWed, May 19, 6:10 PM AKDT · 1952 days ago · 18 km deep · 71 km away
29. 3.593 km ESE of Akutan, AlaskaMon, May 24, 10:57 PM AKDT · 1947 days ago · 28 km deep · 76 km away
30. 2.298 km S of False Pass, AlaskaSat, May 29, 5:32 AM AKDT · 1943 days ago · 16 km deep · 53 km away
31. 2.0100 km ESE of Akutan, AlaskaMon, May 31, 2:47 AM AKDT · 1941 days ago · 48 km deep · 70 km away
32. 3.3131 km S of False Pass, AlaskaTue, Jun 1, 11:15 PM AKDT · 1939 days ago · 22 km deep · 31 km away
33. 2.7240 km S of False Pass, AlaskaThu, Jun 10, 7:01 PM AKDT · 1930 days ago · 10 km deep · 93 km away
34. 2.9233 km SSE of False Pass, AlaskaTue, Jun 15, 4:57 PM AKDT · 1925 days ago · 10 km deep · 99 km away
35. 3.8140 km S of False Pass, AlaskaWed, Jun 16, 10:14 AM AKDT · 1925 days ago · 35 km deep · 11 km away
36. 2.8145 km S of False Pass, AlaskaThu, Jun 17, 8:08 PM AKDT · 1923 days ago · 31 km deep · 8 km away
37. 2.893 km SSE of False Pass, AlaskaThu, Jun 17, 8:33 PM AKDT · 1923 days ago · 35 km deep · 69 km away
38. 3.281 km SE of False Pass, AlaskaFri, Jun 18, 11:50 PM AKDT · 1922 days ago · 27 km deep · 95 km away

Before

1. 2.288 km SE of Akutan, AlaskaTue, Apr 20, 7:00 AM AKDT · 1982 days ago · 51 km deep · 98 km away
2. 3.2108 km ESE of Akutan, AlaskaMon, Apr 19, 4:05 AM AKDT · 1983 days ago · 21 km deep · 62 km away
3. 1.778 km ESE of Akutan, AlaskaSun, Apr 18, 7:49 PM AKDT · 1983 days ago · 26 km deep · 93 km away
4. 2.2237 km S of False Pass, AlaskaSun, Apr 18, 7:34 AM AKDT · 1984 days ago · 3 km deep · 96 km away
5. 1.5103 km ESE of Akutan, AlaskaSun, Apr 18, 7:01 AM AKDT · 1984 days ago · 52 km deep · 68 km away
6. 2.5218 km SE of Akutan, AlaskaSat, Apr 17, 11:37 PM AKDT · 1984 days ago · 10 km deep · 90 km away
7. 1.8119 km S of False Pass, AlaskaSat, Apr 17, 9:30 PM AKDT · 1984 days ago · 26 km deep · 32 km away
8. 1.797 km SE of Akutan, AlaskaSat, Apr 17, 9:09 PM AKDT · 1984 days ago · 25 km deep · 87 km away
9. 2.799 km SE of False Pass, AlaskaSat, Apr 17, 3:26 PM AKDT · 1984 days ago · 21 km deep · 97 km away
10. 2.096 km SSW of False Pass, AlaskaSat, Apr 17, 12:41 AM AKDT · 1985 days ago · 21 km deep · 79 km away
11. 1.8116 km ESE of Akutan, AlaskaFri, Apr 16, 9:27 PM AKDT · 1985 days ago · 18 km deep · 55 km away
12. 2.8208 km SSE of False Pass, AlaskaFri, Apr 16, 8:23 PM AKDT · 1985 days ago · 10 km deep · 96 km away
13. 1.882 km SE of Akutan, AlaskaFri, Apr 16, 5:57 PM AKDT · 1985 days ago · 60 km deep · 96 km away
14. 2.6112 km S of False Pass, AlaskaWed, Apr 14, 5:34 PM AKDT · 1987 days ago · 13 km deep · 37 km away
15. 2.087 km S of False Pass, AlaskaWed, Apr 14, 10:13 AM AKDT · 1988 days ago · 26 km deep · 62 km away
16. 1.8Unimak Island region, AlaskaTue, Apr 13, 7:41 PM AKDT · 1988 days ago · 26 km deep · 52 km away
17. 2.2104 km ESE of Akutan, AlaskaSun, Apr 11, 1:22 AM AKDT · 1991 days ago · 26 km deep · 68 km away
18. 2.3115 km S of False Pass, AlaskaFri, Apr 9, 4:47 AM AKDT · 1993 days ago · 26 km deep · 38 km away
19. 1.882 km S of False Pass, AlaskaMon, Apr 5, 8:33 AM AKDT · 1997 days ago · 26 km deep · 69 km away
20. 2.9106 km SSE of False Pass, AlaskaSun, Apr 4, 6:02 PM AKDT · 1997 days ago · 18 km deep · 52 km away

From the USGS Earthquake Hazards Program and its partner networks, event us6000e3t8 (also filed as ak02155m17cn). Read Wed, Sep 23, 2026, 10:43 AM UTC.