M1.8 earthquake 102 km W of Adak, Alaska

Magnitude

1.8 (ML, local (Richter)), micro

Magnitude from

AV

Local time

Tue, Mar 21, 2023, 3:20 AM HADT

UTC

2023-03-21 12:20:31 UTC

Depth

6.2 km (3.9 mi), shallow

Epicenter

51.868° N, 178.121° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.7 km horizontally, 0.8 km in depth

Magnitude uncertainty

±0.10

Depth from

From location

Station coverage gap

230°, poorly surrounded by stations

Stations used

4

After

1. 2.0100 km W of Adak, AlaskaTue, Mar 21, 4:06 AM HADT · 1290 days ago · 3 km deep · 3 km away
2. 1.694 km W of Adak, AlaskaTue, Mar 21, 4:08 AM HADT · 1290 days ago · 2 km deep · 8 km away
3. 1.999 km W of Adak, AlaskaTue, Mar 21, 5:51 AM HADT · 1290 days ago · -2 km deep · 3 km away
4. 1.799 km W of Adak, AlaskaTue, Mar 21, 5:52 AM HADT · 1290 days ago · 3 km deep · 3 km away
5. 1.697 km W of Adak, AlaskaTue, Mar 21, 5:54 AM HADT · 1290 days ago · -2 km deep · 6 km away
6. 1.793 km W of Adak, AlaskaTue, Mar 21, 6:44 AM HADT · 1290 days ago · 7 km deep · 9 km away
7. 1.792 km W of Adak, AlaskaTue, Mar 21, 6:54 AM HADT · 1290 days ago · 6 km deep · 10 km away
8. 2.599 km W of Adak, AlaskaTue, Mar 21, 7:15 AM HADT · 1290 days ago · 4 km deep · 4 km away
9. 1.6100 km W of Adak, AlaskaTue, Mar 21, 7:57 AM HADT · 1289 days ago · 2 km deep · 2 km away
10. 2.0101 km W of Adak, AlaskaTue, Mar 21, 9:23 AM HADT · 1289 days ago · 3 km deep · 1 km away
11. 2.299 km W of Adak, AlaskaTue, Mar 21, 10:13 AM HADT · 1289 days ago · 5 km deep · 3 km away
12. 1.799 km W of Adak, AlaskaTue, Mar 21, 10:37 AM HADT · 1289 days ago · 3 km deep · 3 km away
13. 1.6100 km W of Adak, AlaskaTue, Mar 21, 3:02 PM HADT · 1289 days ago · 4 km deep · 2 km away
14. 2.5Andreanof Islands, Aleutian Islands, AlaskaTue, Mar 21, 6:24 PM HADT · 1289 days ago · 8 km deep · 5 km away
15. 1.696 km W of Adak, AlaskaTue, Mar 21, 8:46 PM HADT · 1289 days ago · -1 km deep · 7 km away
16. 2.2Andreanof Islands, Aleutian Islands, AlaskaWed, Mar 22, 8:31 AM HADT · 1288 days ago · 8 km deep · 2 km away
17. 1.699 km W of Adak, AlaskaWed, Mar 22, 10:58 AM HADT · 1288 days ago · 3 km deep · 3 km away
18. 2.5Andreanof Islands, Aleutian Islands, AlaskaWed, Mar 22, 2:35 PM HADT · 1288 days ago · 5 km deep · 3 km away
19. 1.592 km W of Adak, AlaskaWed, Mar 22, 5:42 PM HADT · 1288 days ago · 6 km deep · 10 km away
20. 1.799 km W of Adak, AlaskaWed, Mar 22, 7:21 PM HADT · 1288 days ago · 4 km deep · 4 km away
21. 1.6100 km W of Adak, AlaskaWed, Mar 22, 8:53 PM HADT · 1288 days ago · 4 km deep · 3 km away
22. 1.5100 km W of Adak, AlaskaWed, Mar 22, 9:20 PM HADT · 1288 days ago · 4 km deep · 2 km away
23. 2.498 km W of Adak, AlaskaWed, Mar 22, 10:34 PM HADT · 1288 days ago · 5 km deep · 4 km away
24. 2.299 km W of Adak, AlaskaWed, Mar 22, 10:37 PM HADT · 1288 days ago · 4 km deep · 2 km away
25. 1.799 km W of Adak, AlaskaThu, Mar 23, 12:43 AM HADT · 1288 days ago · 3 km deep · 4 km away
26. 2.1107 km SW of Adak, AlaskaThu, Mar 23, 4:38 AM HADT · 1288 days ago · 24 km deep · 73 km away
27. 1.599 km W of Adak, AlaskaThu, Mar 23, 10:10 AM HADT · 1287 days ago · 3 km deep · 4 km away
28. 2.199 km W of Adak, AlaskaThu, Mar 23, 10:34 AM HADT · 1287 days ago · 4 km deep · 3 km away
29. 1.598 km W of Adak, AlaskaThu, Mar 23, 2:29 PM HADT · 1287 days ago · 3 km deep · 4 km away
30. 1.699 km W of Adak, AlaskaThu, Mar 23, 2:55 PM HADT · 1287 days ago · 4 km deep · 3 km away
31. 1.6100 km W of Adak, AlaskaThu, Mar 23, 3:23 PM HADT · 1287 days ago · 3 km deep · 2 km away
32. 2.099 km W of Adak, AlaskaThu, Mar 23, 5:40 PM HADT · 1287 days ago · 4 km deep · 3 km away
33. 2.099 km W of Adak, AlaskaThu, Mar 23, 11:07 PM HADT · 1287 days ago · 4 km deep · 3 km away
34. 1.899 km W of Adak, AlaskaThu, Mar 23, 11:07 PM HADT · 1287 days ago · 1 km deep · 3 km away
35. 1.9112 km W of Adak, AlaskaFri, Mar 24, 1:10 AM HADT · 1287 days ago · 10 km deep · 12 km away
36. 2.698 km W of Adak, AlaskaFri, Mar 24, 8:59 AM HADT · 1286 days ago · 8 km deep · 4 km away
37. 1.6100 km W of Adak, AlaskaFri, Mar 24, 10:53 AM HADT · 1286 days ago · 3 km deep · 2 km away
38. 1.599 km W of Adak, AlaskaFri, Mar 24, 12:49 PM HADT · 1286 days ago · 3 km deep · 3 km away
39. 1.688 km W of Adak, AlaskaFri, Mar 24, 3:22 PM HADT · 1286 days ago · 6 km deep · 14 km away
40. 2.7Andreanof Islands, Aleutian Islands, AlaskaFri, Mar 24, 5:14 PM HADT · 1286 days ago · 5 km deep · 2 km away
41. 1.699 km W of Adak, AlaskaFri, Mar 24, 5:29 PM HADT · 1286 days ago · 3 km deep · 3 km away
42. 1.798 km W of Adak, AlaskaFri, Mar 24, 7:11 PM HADT · 1286 days ago · -2 km deep · 4 km away
43. 1.696 km W of Adak, AlaskaFri, Mar 24, 10:15 PM HADT · 1286 days ago · -2 km deep · 6 km away
44. 1.699 km W of Adak, AlaskaFri, Mar 24, 11:16 PM HADT · 1286 days ago · -2 km deep · 3 km away
45. 1.7100 km W of Adak, AlaskaSat, Mar 25, 1:21 AM HADT · 1286 days ago · 3 km deep · 2 km away
46. 1.5100 km W of Adak, AlaskaSat, Mar 25, 1:21 AM HADT · 1286 days ago · 3 km deep · 2 km away
47. 2.099 km W of Adak, AlaskaSat, Mar 25, 5:32 AM HADT · 1286 days ago · -2 km deep · 3 km away
48. 1.599 km W of Adak, AlaskaSat, Mar 25, 5:38 AM HADT · 1286 days ago · -2 km deep · 3 km away
49. 3.1100 km W of Adak, AlaskaSat, Mar 25, 11:27 AM HADT · 1285 days ago · 5 km deep · 3 km away
50. 1.5100 km W of Adak, AlaskaSat, Mar 25, 11:30 AM HADT · 1285 days ago · 2 km deep · 2 km away
51. 2.2100 km W of Adak, AlaskaSat, Mar 25, 11:35 AM HADT · 1285 days ago · 3 km deep · 3 km away
52. 2.199 km W of Adak, AlaskaSat, Mar 25, 11:53 AM HADT · 1285 days ago · 3 km deep · 4 km away
53. 2.0100 km W of Adak, AlaskaSat, Mar 25, 4:25 PM HADT · 1285 days ago · 4 km deep · 3 km away
54. 2.155 km SW of Adak, AlaskaSat, Mar 25, 5:10 PM HADT · 1285 days ago · 76 km deep · 70 km away
55. 2.1101 km W of Adak, AlaskaSat, Mar 25, 5:14 PM HADT · 1285 days ago · 5 km deep · 3 km away
56. 1.699 km W of Adak, AlaskaSat, Mar 25, 5:42 PM HADT · 1285 days ago · 3 km deep · 3 km away
57. 2.3190 km WSW of Adak, AlaskaSat, Mar 25, 7:28 PM HADT · 1285 days ago · 24 km deep · 97 km away
58. 2.098 km W of Adak, AlaskaSat, Mar 25, 7:58 PM HADT · 1285 days ago · 4 km deep · 4 km away
59. 1.698 km W of Adak, AlaskaSat, Mar 25, 11:08 PM HADT · 1285 days ago · 3 km deep · 4 km away
60. 2.099 km W of Adak, AlaskaSun, Mar 26, 3:15 AM HADT · 1285 days ago · 3 km deep · 3 km away

The first 60 of at least 201.

Before

1. 2.3105 km W of Adak, AlaskaTue, Mar 21, 3:08 AM HADT · 1290 days ago · 6 km deep · 3 km away
2. 1.599 km W of Adak, AlaskaTue, Mar 21, 2:20 AM HADT · 1290 days ago · 3 km deep · 3 km away
3. 2.6137 km WSW of Adak, AlaskaTue, Mar 21, 2:14 AM HADT · 1290 days ago · 10 km deep · 71 km away
4. 1.6100 km W of Adak, AlaskaTue, Mar 21, 1:23 AM HADT · 1290 days ago · -2 km deep · 2 km away
5. 2.299 km W of Adak, AlaskaTue, Mar 21, 12:41 AM HADT · 1290 days ago · 4 km deep · 3 km away
6. 1.699 km W of Adak, AlaskaMon, Mar 20, 9:32 PM HADT · 1290 days ago · -2 km deep · 3 km away
7. 2.3100 km W of Adak, AlaskaMon, Mar 20, 2:08 PM HADT · 1290 days ago · 3 km deep · 2 km away
8. 2.298 km W of Adak, AlaskaMon, Mar 20, 1:15 PM HADT · 1290 days ago · 2 km deep · 5 km away
9. 2.3Andreanof Islands, Aleutian Islands, AlaskaMon, Mar 20, 12:47 PM HADT · 1290 days ago · 1 km deep · 5 km away
10. 2.497 km W of Adak, AlaskaMon, Mar 20, 12:21 PM HADT · 1290 days ago · 4 km deep · 5 km away
11. 2.1100 km W of Adak, AlaskaMon, Mar 20, 11:48 AM HADT · 1290 days ago · 5 km deep · 2 km away
12. 2.5100 km W of Adak, AlaskaMon, Mar 20, 8:18 AM HADT · 1290 days ago · 8 km deep · 3 km away
13. 1.599 km W of Adak, AlaskaMon, Mar 20, 6:28 AM HADT · 1291 days ago · 3 km deep · 3 km away
14. 1.799 km W of Adak, AlaskaMon, Mar 20, 5:26 AM HADT · 1291 days ago · 3 km deep · 4 km away
15. 1.993 km W of Adak, AlaskaMon, Mar 20, 4:03 AM HADT · 1291 days ago · -2 km deep · 9 km away
16. 1.899 km W of Adak, AlaskaMon, Mar 20, 1:43 AM HADT · 1291 days ago · 3 km deep · 3 km away
17. 1.5100 km W of Adak, AlaskaMon, Mar 20, 1:16 AM HADT · 1291 days ago · 3 km deep · 3 km away
18. 3.099 km W of Adak, AlaskaSun, Mar 19, 12:19 PM HADT · 1291 days ago · 5 km deep · 4 km away
19. 2.3100 km W of Adak, AlaskaSun, Mar 19, 6:55 AM HADT · 1292 days ago · 4 km deep · 3 km away
20. 1.7100 km W of Adak, AlaskaSun, Mar 19, 6:21 AM HADT · 1292 days ago · 3 km deep · 2 km away

From the USGS Earthquake Hazards Program and its partner networks, event av91814321. Read Thu, Oct 1, 2026, 4:19 AM UTC.