M4.1 earthquake 204 km WSW of Adak, Alaska

Magnitude

4.1 (mb), light

Local time

Fri, Jan 1, 2021, 1:55 AM HAST

UTC

2021-01-01 11:55:47 UTC

Depth

35.0 km (21.7 mi), shallow

Epicenter

51.447° N, 179.502° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 14.4 km horizontally, 2.0 km in depth

Magnitude uncertainty

±0.15

Depth from

Operator assigned

Station coverage gap

211°, poorly surrounded by stations

Stations used

23

After

1. 6.1230 km WSW of Adak, AlaskaSun, Jan 3, 2:38 AM HAST · 2091 days ago · 21 km deep · 32 km away · felt by 3 · tsunami flag
2. 3.7251 km WSW of Adak, AlaskaSun, Jan 3, 12:56 AM GMT-12 · 2091 days ago · 10 km deep · 69 km away
3. 3.9242 km WSW of Adak, AlaskaSun, Jan 3, 1:13 AM GMT-12 · 2091 days ago · 35 km deep · 49 km away
4. 4.0236 km WSW of Adak, AlaskaSun, Jan 3, 3:20 AM HAST · 2091 days ago · 31 km deep · 36 km away
5. 3.7230 km W of Adak, AlaskaSun, Jan 3, 3:45 AM HAST · 2091 days ago · 6 km deep · 45 km away
6. 4.0231 km WSW of Adak, AlaskaSun, Jan 3, 12:51 PM HAST · 2091 days ago · 35 km deep · 34 km away
7. 2.1176 km WSW of Adak, AlaskaMon, Jan 4, 5:25 AM HAST · 2090 days ago · 76 km deep · 28 km away
8. 2.3241 km WSW of Adak, AlaskaMon, Jan 4, 3:39 AM GMT-12 · 2090 days ago · 47 km deep · 49 km away
9. 2.9253 km WSW of Adak, AlaskaTue, Jan 5, 3:22 PM GMT+12 · 2089 days ago · 35 km deep · 51 km away
10. 3.2241 km WSW of Adak, AlaskaMon, Jan 4, 6:01 PM GMT-12 · 2089 days ago · 23 km deep · 44 km away
11. 3.1245 km WSW of Adak, AlaskaTue, Jan 5, 2:09 PM GMT-12 · 2089 days ago · 10 km deep · 56 km away
12. 1.9185 km WSW of Adak, AlaskaTue, Jan 5, 4:51 PM HAST · 2089 days ago · 12 km deep · 21 km away
13. 2.6253 km WSW of Adak, AlaskaWed, Jan 6, 10:33 PM GMT+12 · 2088 days ago · 35 km deep · 60 km away
14. 2.6247 km WSW of Adak, AlaskaTue, Jan 5, 11:22 PM GMT-12 · 2088 days ago · 10 km deep · 70 km away
15. 3.5210 km WSW of Adak, AlaskaWed, Jan 6, 1:36 AM HAST · 2088 days ago · 35 km deep · 35 km away
16. 4.1193 km WSW of Adak, AlaskaWed, Jan 6, 8:29 AM HAST · 2088 days ago · 28 km deep · 40 km away
17. 3.2250 km WSW of Adak, AlaskaWed, Jan 6, 2:28 PM GMT-12 · 2088 days ago · 35 km deep · 57 km away
18. 1.5125 km WSW of Adak, AlaskaWed, Jan 6, 6:11 PM HAST · 2087 days ago · 13 km deep · 83 km away
19. 3.6240 km WSW of Adak, AlaskaWed, Jan 6, 5:11 PM GMT-12 · 2087 days ago · 24 km deep · 41 km away
20. 2.9258 km WSW of Adak, AlaskaThu, Jan 7, 9:25 PM GMT+12 · 2087 days ago · 33 km deep · 57 km away
21. 3.0134 km WSW of Adak, AlaskaThu, Jan 7, 3:43 AM HAST · 2087 days ago · 31 km deep · 86 km away
22. 2.8205 km WSW of Adak, AlaskaThu, Jan 7, 10:54 PM HAST · 2086 days ago · 35 km deep · 36 km away
23. 2.0231 km WSW of Adak, AlaskaThu, Jan 7, 11:32 PM HAST · 2086 days ago · 8 km deep · 44 km away
24. 2.2141 km WSW of Adak, AlaskaSat, Jan 9, 4:19 AM HAST · 2085 days ago · 22 km deep · 67 km away
25. 4.0195 km WNW of Adak, AlaskaFri, Jan 15, 8:10 PM HAST · 2078 days ago · 211 km deep · 96 km away
26. 1.8172 km W of Adak, AlaskaMon, Jan 18, 12:34 PM HAST · 2076 days ago · 11 km deep · 39 km away
27. 1.9133 km WSW of Adak, AlaskaWed, Jan 20, 1:31 AM HAST · 2074 days ago · 26 km deep · 84 km away
28. 2.7157 km WSW of Adak, AlaskaWed, Jan 20, 4:19 AM HAST · 2074 days ago · 17 km deep · 57 km away
29. 2.2152 km WSW of Adak, AlaskaWed, Jan 20, 11:41 AM HAST · 2074 days ago · 22 km deep · 75 km away
30. 2.1126 km WSW of Adak, AlaskaWed, Jan 20, 4:29 PM HAST · 2074 days ago · 7 km deep · 78 km away
31. 2.3188 km W of Adak, AlaskaWed, Jan 20, 4:44 PM HAST · 2074 days ago · 95 km deep · 66 km away
32. 1.6126 km WSW of Adak, AlaskaThu, Jan 21, 12:08 AM HAST · 2073 days ago · 7 km deep · 78 km away
33. 2.1194 km W of Adak, AlaskaThu, Jan 21, 1:25 AM HAST · 2073 days ago · 89 km deep · 25 km away
34. 1.9131 km W of Adak, AlaskaFri, Jan 22, 8:55 AM HAST · 2072 days ago · 94 km deep · 74 km away
35. 2.1162 km W of Adak, AlaskaFri, Jan 22, 3:10 PM HAST · 2072 days ago · 92 km deep · 44 km away
36. 1.9137 km WSW of Adak, AlaskaFri, Jan 22, 6:31 PM HAST · 2071 days ago · 25 km deep · 75 km away
37. 1.7113 km WSW of Adak, AlaskaSat, Jan 23, 3:11 AM HAST · 2071 days ago · 13 km deep · 93 km away
38. 1.9135 km WSW of Adak, AlaskaSat, Jan 23, 12:33 PM HAST · 2071 days ago · 23 km deep · 84 km away
39. 2.0124 km WSW of Adak, AlaskaSun, Jan 24, 8:33 AM HAST · 2070 days ago · 14 km deep · 86 km away
40. 2.1134 km WSW of Adak, AlaskaThu, Jan 28, 8:30 AM HAST · 2066 days ago · 20 km deep · 80 km away
41. 2.1131 km W of Adak, AlaskaFri, Jan 29, 1:42 PM HAST · 2065 days ago · 115 km deep · 76 km away
42. 2.7243 km WSW of Adak, AlaskaFri, Jan 29, 6:43 PM GMT-12 · 2064 days ago · 21 km deep · 50 km away
43. 2.8138 km SW of Adak, AlaskaSat, Jan 30, 5:25 PM HAST · 2063 days ago · 35 km deep · 98 km away
44. 2.0118 km WSW of Adak, AlaskaMon, Feb 1, 1:12 AM HAST · 2062 days ago · 33 km deep · 97 km away
45. 2.8252 km WSW of Adak, AlaskaTue, Feb 2, 5:12 AM GMT+12 · 2062 days ago · 35 km deep · 55 km away
46. 1.9178 km WSW of Adak, AlaskaMon, Feb 1, 1:15 PM HAST · 2062 days ago · 1 km deep · 26 km away
47. 1.9149 km WSW of Adak, AlaskaWed, Feb 3, 8:34 PM HAST · 2059 days ago · 10 km deep · 58 km away
48. 2.8154 km SW of Adak, AlaskaTue, Feb 9, 4:44 AM HAST · 2054 days ago · 31 km deep · 79 km away
49. 3.0242 km WSW of Adak, AlaskaThu, Feb 11, 12:41 PM GMT-12 · 2052 days ago · 13 km deep · 52 km away
50. 2.8150 km WSW of Adak, AlaskaThu, Feb 11, 11:41 PM HAST · 2051 days ago · 32 km deep · 80 km away
51. 4.8184 km WSW of Adak, AlaskaSun, Feb 14, 9:13 AM HAST · 2049 days ago · 23 km deep · 20 km away
52. 3.3Andreanof Islands, Aleutian Islands, AlaskaSun, Feb 14, 9:26 AM HAST · 2049 days ago · 35 km deep · 25 km away
53. 3.5173 km WSW of Adak, AlaskaSun, Feb 14, 11:37 PM HAST · 2048 days ago · 10 km deep · 31 km away
54. 3.9139 km WSW of Adak, AlaskaTue, Feb 16, 6:58 AM HAST · 2047 days ago · 35 km deep · 86 km away
55. 2.0135 km WSW of Adak, AlaskaTue, Feb 16, 11:10 AM HAST · 2047 days ago · 24 km deep · 84 km away
56. 1.9126 km WSW of Adak, AlaskaWed, Feb 17, 6:54 AM HAST · 2046 days ago · 26 km deep · 89 km away
57. 2.5122 km WSW of Adak, AlaskaWed, Feb 17, 3:08 PM HAST · 2046 days ago · 75 km deep · 82 km away
58. 2.5193 km WSW of Adak, AlaskaWed, Feb 17, 8:35 PM HAST · 2045 days ago · 27 km deep · 29 km away
59. 3.8212 km WSW of Adak, AlaskaThu, Feb 18, 8:31 PM HAST · 2044 days ago · 31 km deep · 48 km away
60. 2.8224 km WSW of Adak, AlaskaThu, Feb 18, 8:39 PM HAST · 2044 days ago · 26 km deep · 61 km away

The first 60 of 102.

Before

1. 1.6115 km WSW of Adak, AlaskaWed, Dec 30, 5:16 PM HAST · 2094 days ago · 29 km deep · 98 km away
2. 1.8183 km WSW of Adak, AlaskaWed, Dec 30, 5:14 PM HAST · 2094 days ago · 15 km deep · 55 km away
3. 2.7120 km WSW of Adak, AlaskaWed, Dec 30, 2:57 AM HAST · 2095 days ago · 21 km deep · 83 km away
4. 2.1111 km WSW of Adak, AlaskaTue, Dec 29, 1:15 PM HAST · 2096 days ago · 69 km deep · 92 km away
5. 2.7239 km WSW of Adak, AlaskaTue, Dec 29, 10:09 AM GMT-12 · 2096 days ago · 35 km deep · 37 km away
6. 3.2127 km WSW of Adak, AlaskaMon, Dec 28, 6:33 PM HAST · 2096 days ago · 10 km deep · 78 km away
7. 2.1129 km WSW of Adak, AlaskaMon, Dec 28, 4:27 AM HAST · 2097 days ago · 26 km deep · 91 km away
8. 2.2131 km SW of Adak, AlaskaSun, Dec 27, 5:03 PM HAST · 2097 days ago · 26 km deep · 100 km away
9. 3.3288 km W of Adak, AlaskaMon, Dec 28, 10:23 AM GMT+12 · 2098 days ago · 35 km deep · 92 km away
10. 1.8115 km WSW of Adak, AlaskaFri, Dec 25, 3:37 PM HAST · 2100 days ago · 29 km deep · 95 km away
11. 1.9129 km WSW of Adak, AlaskaFri, Dec 25, 9:20 AM HAST · 2100 days ago · 26 km deep · 90 km away
12. 3.9191 km WSW of Adak, AlaskaFri, Dec 25, 2:25 AM HAST · 2100 days ago · 83 km deep · 17 km away
13. 3.0183 km WSW of Adak, AlaskaThu, Dec 24, 5:26 AM HAST · 2101 days ago · 35 km deep · 51 km away
14. 3.1253 km WSW of Adak, AlaskaThu, Dec 24, 10:29 AM GMT+12 · 2102 days ago · 10 km deep · 58 km away
15. 2.6139 km WSW of Adak, AlaskaWed, Dec 23, 2:49 AM HAST · 2102 days ago · 35 km deep · 85 km away
16. 2.2148 km WSW of Adak, AlaskaWed, Dec 23, 1:14 AM HAST · 2102 days ago · 58 km deep · 58 km away
17. 2.7112 km W of Adak, AlaskaMon, Dec 21, 11:05 AM HAST · 2104 days ago · 107 km deep · 93 km away
18. 1.9152 km WSW of Adak, AlaskaMon, Dec 21, 4:37 AM HAST · 2104 days ago · 11 km deep · 52 km away
19. 3.0254 km WSW of Adak, AlaskaMon, Dec 21, 7:56 PM GMT+12 · 2104 days ago · 12 km deep · 58 km away
20. 1.7156 km WSW of Adak, AlaskaSun, Dec 20, 7:42 PM HAST · 2104 days ago · 14 km deep · 48 km away

From the USGS Earthquake Hazards Program and its partner networks, event us6000d7qq. Read Fri, Sep 25, 2026, 2:23 PM UTC.