M1.8 earthquake 85 km W of Adak, Alaska

Magnitude

1.8 (ML, local (Richter)), micro

Magnitude from

AV

Local time

Mon, Oct 20, 2025, 5:28 PM HADT

UTC

2025-10-21 02:28:59 UTC

Depth

-1.8 km (-1.1 mi), shallow

Epicenter

51.890° N, 177.871° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.2 km horizontally, 1.8 km in depth

Magnitude uncertainty

±0.27

Depth from

From location

Station coverage gap

235°, poorly surrounded by stations

Stations used

5

After

1. 1.785 km W of Adak, AlaskaMon, Oct 20, 5:55 PM HADT · 347 days ago · 4 km deep · 1 km away
2. 1.984 km W of Adak, AlaskaMon, Oct 20, 6:34 PM HADT · 347 days ago · 3 km deep · 0 km away
3. 1.584 km W of Adak, AlaskaMon, Oct 20, 6:34 PM HADT · 347 days ago · 5 km deep · 1 km away
4. 1.810 km NE of Adak, AlaskaThu, Oct 23, 10:00 PM HADT · 344 days ago · 28 km deep · 92 km away
5. 2.4126 km WSW of Adak, AlaskaSat, Oct 25, 7:46 PM HADT · 342 days ago · 9 km deep · 50 km away
6. 3.8120 km SW of Adak, AlaskaSat, Oct 25, 9:36 PM HADT · 342 days ago · 31 km deep · 73 km away
7. 1.9118 km WSW of Adak, AlaskaSun, Oct 26, 1:46 AM HADT · 341 days ago · 16 km deep · 49 km away
8. 2.7149 km WSW of Adak, AlaskaSun, Oct 26, 7:55 AM HADT · 341 days ago · 10 km deep · 79 km away
9. 1.576 km WSW of Adak, AlaskaMon, Oct 27, 10:54 PM HADT · 340 days ago · 18 km deep · 34 km away
10. 1.9143 km W of Adak, AlaskaTue, Oct 28, 2:56 AM HADT · 339 days ago · 18 km deep · 59 km away
11. 1.5163 km W of Adak, AlaskaSat, Nov 1, 2:27 PM HADT · 335 days ago · 6 km deep · 78 km away
12. 2.383 km WSW of Adak, AlaskaSun, Nov 2, 6:45 AM HAST · 334 days ago · 14 km deep · 50 km away
13. 3.693 km WSW of Adak, AlaskaTue, Nov 11, 7:15 AM HAST · 325 days ago · 87 km deep · 36 km away
14. 3.010 km S of Adak, AlaskaWed, Nov 12, 4:55 PM HAST · 324 days ago · 67 km deep · 87 km away
15. 3.676 km SSW of Adak, AlaskaWed, Nov 12, 7:16 PM HAST · 324 days ago · 35 km deep · 92 km away
16. 3.7144 km WSW of Adak, AlaskaWed, Nov 12, 11:17 PM HAST · 324 days ago · 35 km deep · 79 km away
17. 3.0120 km WSW of Adak, AlaskaSun, Nov 16, 8:05 AM HAST · 320 days ago · 37 km deep · 60 km away
18. 1.676 km W of Adak, AlaskaMon, Nov 17, 7:29 AM HAST · 319 days ago · 6 km deep · 10 km away
19. 3.194 km WSW of Adak, AlaskaMon, Nov 17, 7:08 PM HAST · 319 days ago · 61 km deep · 33 km away
20. 2.9157 km WSW of Adak, AlaskaMon, Nov 17, 7:13 PM HAST · 319 days ago · 8 km deep · 91 km away
21. 2.015 km SSE of Adak, AlaskaTue, Nov 18, 11:38 AM HAST · 318 days ago · 59 km deep · 92 km away
22. 2.3106 km WSW of Adak, AlaskaWed, Nov 19, 2:50 AM HAST · 317 days ago · 35 km deep · 53 km away
23. 2.977 km SW of Adak, AlaskaWed, Nov 19, 6:27 AM HAST · 317 days ago · 35 km deep · 50 km away
24. 3.029 km SSW of Adak, AlaskaWed, Nov 19, 7:38 AM HAST · 317 days ago · 69 km deep · 78 km away
25. 3.1119 km SW of Adak, AlaskaWed, Nov 19, 10:57 AM HAST · 317 days ago · 35 km deep · 78 km away
26. 2.478 km WSW of Adak, AlaskaWed, Nov 19, 12:17 PM HAST · 317 days ago · 17 km deep · 45 km away
27. 2.4128 km WSW of Adak, AlaskaThu, Nov 20, 2:25 PM HAST · 316 days ago · 44 km deep · 67 km away
28. 4.3124 km SW of Adak, AlaskaFri, Nov 21, 8:49 AM HAST · 315 days ago · 46 km deep · 75 km away
29. 1.8137 km WSW of Adak, AlaskaFri, Nov 21, 5:58 PM HAST · 315 days ago · 14 km deep · 58 km away
30. 2.6177 km W of Adak, AlaskaFri, Nov 21, 11:58 PM HAST · 314 days ago · 239 km deep · 92 km away
31. 3.6127 km SW of Adak, AlaskaSat, Nov 22, 9:10 AM HAST · 314 days ago · 10 km deep · 87 km away
32. 5.567 km SSW of Adak, AlaskaSat, Nov 22, 10:21 PM HAST · 314 days ago · 33 km deep · 87 km away · felt by 3
33. 3.171 km SSW of Adak, AlaskaSat, Nov 22, 10:27 PM HAST · 314 days ago · 35 km deep · 93 km away
34. 2.775 km SSW of Adak, AlaskaSat, Nov 22, 10:55 PM HAST · 314 days ago · 35 km deep · 91 km away
35. 4.065 km SSW of Adak, AlaskaSun, Nov 23, 12:44 AM HAST · 313 days ago · 35 km deep · 85 km away
36. 2.367 km SSW of Adak, AlaskaSun, Nov 23, 10:43 PM HAST · 313 days ago · 35 km deep · 79 km away
37. 3.743 km N of Adak, AlaskaMon, Nov 24, 3:17 PM HAST · 312 days ago · 223 km deep · 94 km away
38. 2.3105 km WSW of Adak, AlaskaMon, Nov 24, 8:01 PM HAST · 312 days ago · 20 km deep · 54 km away
39. 2.269 km SSW of Adak, AlaskaMon, Nov 24, 11:59 PM HAST · 311 days ago · 35 km deep · 93 km away
40. 2.1109 km WSW of Adak, AlaskaTue, Nov 25, 3:20 AM HAST · 311 days ago · 13 km deep · 50 km away
41. 2.462 km SSW of Adak, AlaskaTue, Nov 25, 8:55 AM HAST · 311 days ago · 42 km deep · 83 km away
42. 2.760 km SSW of Adak, AlaskaTue, Nov 25, 8:09 PM HAST · 311 days ago · 35 km deep · 82 km away
43. 2.259 km SSW of Adak, AlaskaWed, Nov 26, 11:54 AM HAST · 310 days ago · 38 km deep · 76 km away
44. 2.4122 km WSW of Adak, AlaskaThu, Nov 27, 4:40 AM HAST · 309 days ago · 23 km deep · 56 km away
45. 2.866 km SSW of Adak, AlaskaThu, Nov 27, 6:20 AM HAST · 309 days ago · 35 km deep · 87 km away
46. 2.253 km SW of Adak, AlaskaThu, Nov 27, 1:09 PM HAST · 309 days ago · 45 km deep · 63 km away
47. 4.4140 km WSW of Adak, AlaskaThu, Nov 27, 6:32 PM HAST · 309 days ago · 48 km deep · 79 km away
48. 2.831 km NW of Adak, AlaskaFri, Nov 28, 4:24 PM HAST · 308 days ago · 123 km deep · 63 km away
49. 3.4130 km WSW of Adak, AlaskaSat, Nov 29, 10:30 PM HAST · 307 days ago · 38 km deep · 77 km away · felt by 1
50. 3.9105 km SW of Adak, AlaskaMon, Dec 1, 12:29 AM HAST · 305 days ago · 48 km deep · 83 km away
51. 1.982 km W of Adak, AlaskaThu, Dec 4, 1:04 AM HAST · 302 days ago · 5 km deep · 4 km away
52. 2.6154 km WSW of Adak, AlaskaThu, Dec 4, 4:49 PM HAST · 302 days ago · 59 km deep · 83 km away
53. 2.8119 km SW of Adak, AlaskaFri, Dec 5, 4:55 AM HAST · 301 days ago · 16 km deep · 90 km away
54. 2.4135 km WSW of Adak, AlaskaSat, Dec 6, 12:20 AM HAST · 300 days ago · 35 km deep · 80 km away
55. 2.0133 km WSW of Adak, AlaskaMon, Dec 8, 1:13 PM HAST · 298 days ago · 12 km deep · 61 km away
56. 2.697 km WSW of Adak, AlaskaTue, Dec 9, 7:15 AM HAST · 297 days ago · 48 km deep · 54 km away
57. 2.474 km SSW of Adak, AlaskaTue, Dec 9, 6:42 PM HAST · 297 days ago · 35 km deep · 96 km away
58. 2.065 km SW of Adak, AlaskaWed, Dec 10, 1:38 AM HAST · 296 days ago · 43 km deep · 69 km away
59. 1.961 km SSW of Adak, AlaskaWed, Dec 10, 1:51 AM HAST · 296 days ago · 35 km deep · 86 km away
60. 2.296 km SW of Adak, AlaskaWed, Dec 10, 2:41 AM HAST · 296 days ago · 28 km deep · 86 km away

The first 60 of 93.

Before

1. 2.184 km W of Adak, AlaskaMon, Oct 20, 5:10 PM HADT · 347 days ago · 1 km deep · 4 km away
2. 4.971 km SSW of Adak, AlaskaMon, Oct 20, 9:45 AM HADT · 347 days ago · 37 km deep · 86 km away · felt by 2
3. 1.618 km W of Adak, AlaskaSun, Oct 19, 1:36 PM HADT · 348 days ago · 3 km deep · 67 km away
4. 1.8121 km WSW of Adak, AlaskaSat, Oct 18, 4:33 AM HADT · 349 days ago · 35 km deep · 62 km away
5. 2.454 km SW of Adak, AlaskaFri, Oct 17, 9:59 PM HADT · 350 days ago · 36 km deep · 70 km away
6. 2.6122 km SW of Adak, AlaskaFri, Oct 17, 4:05 PM HADT · 350 days ago · 35 km deep · 78 km away
7. 2.6144 km WSW of Adak, AlaskaWed, Oct 15, 12:08 AM HADT · 353 days ago · 80 km deep · 64 km away
8. 1.975 km W of Adak, AlaskaFri, Oct 10, 11:32 PM HADT · 357 days ago · 8 km deep · 10 km away
9. 1.655 km W of Adak, AlaskaFri, Oct 10, 4:44 PM HADT · 357 days ago · -2 km deep · 30 km away
10. 1.7103 km WSW of Adak, AlaskaSun, Oct 5, 9:19 PM HADT · 362 days ago · 16 km deep · 33 km away
11. 2.757 km SSW of Adak, AlaskaSun, Oct 5, 8:35 AM HADT · 362 days ago · 34 km deep · 90 km away
12. 1.681 km W of Adak, AlaskaFri, Oct 3, 4:16 PM HADT · 364 days ago · 8 km deep · 5 km away
13. 1.651 km SW of Adak, AlaskaSun, Sep 28, 5:48 PM HADT · 369 days ago · 14 km deep · 54 km away
14. 2.695 km WSW of Adak, AlaskaSat, Sep 27, 10:28 PM HADT · 370 days ago · 34 km deep · 45 km away
15. 2.1117 km SW of Adak, AlaskaSat, Sep 27, 4:20 AM HADT · 370 days ago · 26 km deep · 75 km away
16. 1.8129 km WSW of Adak, AlaskaSat, Sep 27, 2:18 AM HADT · 370 days ago · 26 km deep · 72 km away
17. 1.850 km SW of Adak, AlaskaFri, Sep 26, 10:51 PM HADT · 371 days ago · 15 km deep · 61 km away
18. 2.6171 km W of Adak, AlaskaFri, Sep 26, 3:08 PM HADT · 371 days ago · 88 km deep · 87 km away
19. 1.788 km W of Adak, AlaskaFri, Sep 26, 1:42 AM HADT · 371 days ago · 4 km deep · 5 km away
20. 2.1164 km WSW of Adak, AlaskaThu, Sep 25, 1:31 PM HADT · 372 days ago · 16 km deep · 83 km away

From the USGS Earthquake Hazards Program and its partner networks, event av93051129. Read Fri, Oct 2, 2026, 9:26 PM UTC.