M1.6 earthquake 99 km W of Adak, Alaska

Magnitude

1.6 (ML, local (Richter)), micro

Magnitude from

AV

Local time

Fri, Mar 31, 2023, 7:28 PM HADT

UTC

2023-04-01 04:28:40 UTC

Depth

3.3 km (2.0 mi), shallow

Epicenter

51.858° N, 178.083° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.8 km horizontally, 1.2 km in depth

Magnitude uncertainty

±0.19

Depth from

From location

Station coverage gap

206°, poorly surrounded by stations

Stations used

4

After

1. 2.797 km W of Adak, AlaskaFri, Mar 31, 11:11 PM HADT · 1279 days ago · 5 km deep · 2 km away
2. 2.398 km W of Adak, AlaskaFri, Mar 31, 11:20 PM HADT · 1279 days ago · 3 km deep · 1 km away
3. 1.8108 km W of Adak, AlaskaSat, Apr 1, 6:56 AM HADT · 1279 days ago · 15 km deep · 9 km away
4. 1.753 km SSW of Adak, AlaskaSat, Apr 1, 1:12 PM HADT · 1279 days ago · 44 km deep · 87 km away
5. 1.7103 km W of Adak, AlaskaSat, Apr 1, 1:57 PM HADT · 1279 days ago · 5 km deep · 4 km away
6. 1.6100 km W of Adak, AlaskaSat, Apr 1, 2:54 PM HADT · 1279 days ago · 3 km deep · 1 km away
7. 1.863 km SSW of Adak, AlaskaSat, Apr 1, 4:47 PM HADT · 1279 days ago · 36 km deep · 90 km away
8. 2.794 km SW of Adak, AlaskaSat, Apr 1, 8:16 PM HADT · 1278 days ago · 35 km deep · 59 km away
9. 1.7112 km WSW of Adak, AlaskaSun, Apr 2, 12:10 AM HADT · 1278 days ago · 50 km deep · 50 km away
10. 2.8Andreanof Islands, Aleutian Islands, AlaskaSun, Apr 2, 1:08 AM HADT · 1278 days ago · 9 km deep · 3 km away
11. 1.793 km SW of Adak, AlaskaSun, Apr 2, 2:12 AM HADT · 1278 days ago · 26 km deep · 58 km away
12. 1.999 km W of Adak, AlaskaSun, Apr 2, 6:40 AM HADT · 1278 days ago · 4 km deep · 1 km away
13. 2.560 km SSW of Adak, AlaskaSun, Apr 2, 1:14 PM HADT · 1278 days ago · 35 km deep · 90 km away
14. 2.2Andreanof Islands, Aleutian Islands, AlaskaSun, Apr 2, 6:05 PM HADT · 1277 days ago · 6 km deep · 1 km away
15. 2.698 km W of Adak, AlaskaSun, Apr 2, 6:40 PM HADT · 1277 days ago · 5 km deep · 2 km away
16. 1.597 km W of Adak, AlaskaSun, Apr 2, 8:05 PM HADT · 1277 days ago · -2 km deep · 2 km away
17. 3.167 km WSW of Adak, AlaskaSun, Apr 2, 10:15 PM HADT · 1277 days ago · 79 km deep · 37 km away
18. 2.567 km WSW of Adak, AlaskaSun, Apr 2, 10:17 PM HADT · 1277 days ago · 79 km deep · 39 km away
19. 1.948 km SW of Adak, AlaskaMon, Apr 3, 9:01 AM HADT · 1277 days ago · 44 km deep · 74 km away
20. 1.699 km W of Adak, AlaskaMon, Apr 3, 9:09 AM HADT · 1277 days ago · 3 km deep · 1 km away
21. 2.798 km W of Adak, AlaskaMon, Apr 3, 10:50 AM HADT · 1277 days ago · 4 km deep · 3 km away
22. 1.6100 km W of Adak, AlaskaMon, Apr 3, 11:49 AM HADT · 1277 days ago · 4 km deep · 1 km away
23. 2.197 km W of Adak, AlaskaMon, Apr 3, 1:25 PM HADT · 1277 days ago · 3 km deep · 2 km away
24. 1.599 km W of Adak, AlaskaMon, Apr 3, 8:24 PM HADT · 1276 days ago · 4 km deep · 0 km away
25. 1.999 km W of Adak, AlaskaTue, Apr 4, 12:58 AM HADT · 1276 days ago · 5 km deep · 1 km away
26. 2.199 km W of Adak, AlaskaTue, Apr 4, 12:58 AM HADT · 1276 days ago · 4 km deep · 1 km away
27. 2.0100 km W of Adak, AlaskaTue, Apr 4, 1:03 AM HADT · 1276 days ago · 4 km deep · 0 km away
28. 1.7100 km W of Adak, AlaskaTue, Apr 4, 1:04 AM HADT · 1276 days ago · 3 km deep · 1 km away
29. 1.9101 km W of Adak, AlaskaTue, Apr 4, 1:06 AM HADT · 1276 days ago · 5 km deep · 2 km away
30. 3.0Andreanof Islands, Aleutian Islands, AlaskaTue, Apr 4, 1:07 AM HADT · 1276 days ago · 5 km deep · 4 km away
31. 1.6100 km W of Adak, AlaskaTue, Apr 4, 9:14 AM HADT · 1276 days ago · -2 km deep · 0 km away
32. 1.9139 km SW of Adak, AlaskaTue, Apr 4, 10:33 AM HADT · 1276 days ago · 23 km deep · 79 km away
33. 1.799 km W of Adak, AlaskaTue, Apr 4, 12:18 PM HADT · 1276 days ago · 6 km deep · 1 km away
34. 2.099 km W of Adak, AlaskaTue, Apr 4, 2:00 PM HADT · 1276 days ago · 5 km deep · 0 km away
35. 1.7108 km W of Adak, AlaskaTue, Apr 4, 6:11 PM HADT · 1275 days ago · 13 km deep · 9 km away
36. 2.198 km SW of Adak, AlaskaWed, Apr 5, 12:12 AM HADT · 1275 days ago · 51 km deep · 60 km away
37. 1.798 km W of Adak, AlaskaWed, Apr 5, 1:17 AM HADT · 1275 days ago · 4 km deep · 1 km away
38. 1.999 km W of Adak, AlaskaWed, Apr 5, 1:29 AM HADT · 1275 days ago · 3 km deep · 1 km away
39. 1.899 km W of Adak, AlaskaWed, Apr 5, 4:44 AM HADT · 1275 days ago · 6 km deep · 1 km away
40. 1.8100 km W of Adak, AlaskaWed, Apr 5, 4:52 AM HADT · 1275 days ago · 5 km deep · 1 km away
41. 1.7106 km SW of Adak, AlaskaWed, Apr 5, 4:57 AM HADT · 1275 days ago · 17 km deep · 69 km away
42. 1.9100 km W of Adak, AlaskaWed, Apr 5, 6:52 AM HADT · 1275 days ago · 5 km deep · 1 km away
43. 1.8140 km WSW of Adak, AlaskaWed, Apr 5, 8:18 AM HADT · 1275 days ago · 10 km deep · 56 km away
44. 2.669 km WSW of Adak, AlaskaWed, Apr 5, 3:02 PM HADT · 1275 days ago · 106 km deep · 35 km away
45. 1.8104 km W of Adak, AlaskaWed, Apr 5, 6:03 PM HADT · 1274 days ago · 7 km deep · 5 km away
46. 1.997 km W of Adak, AlaskaThu, Apr 6, 12:35 AM HADT · 1274 days ago · 5 km deep · 2 km away
47. 1.897 km W of Adak, AlaskaThu, Apr 6, 1:20 AM HADT · 1274 days ago · 4 km deep · 3 km away
48. 1.996 km W of Adak, AlaskaThu, Apr 6, 1:30 AM HADT · 1274 days ago · 6 km deep · 3 km away
49. 2.197 km W of Adak, AlaskaThu, Apr 6, 1:33 AM HADT · 1274 days ago · 6 km deep · 3 km away
50. 2.1Andreanof Islands, Aleutian Islands, AlaskaThu, Apr 6, 2:37 AM HADT · 1274 days ago · 5 km deep · 3 km away
51. 1.798 km W of Adak, AlaskaThu, Apr 6, 2:44 AM HADT · 1274 days ago · 6 km deep · 2 km away
52. 1.8Andreanof Islands, Aleutian Islands, AlaskaThu, Apr 6, 5:26 AM HADT · 1274 days ago · 4 km deep · 3 km away
53. 1.699 km W of Adak, AlaskaThu, Apr 6, 6:15 AM HADT · 1274 days ago · 3 km deep · 1 km away
54. 4.1150 km SW of Adak, AlaskaThu, Apr 6, 10:36 AM HADT · 1274 days ago · 35 km deep · 88 km away
55. 2.2121 km WSW of Adak, AlaskaThu, Apr 6, 1:39 PM HADT · 1274 days ago · 38 km deep · 47 km away
56. 1.9102 km W of Adak, AlaskaThu, Apr 6, 3:43 PM HADT · 1274 days ago · 4 km deep · 3 km away
57. 1.596 km W of Adak, AlaskaThu, Apr 6, 4:28 PM HADT · 1274 days ago · -1 km deep · 4 km away
58. 3.297 km SW of Adak, AlaskaThu, Apr 6, 11:38 PM HADT · 1273 days ago · 35 km deep · 75 km away
59. 2.399 km W of Adak, AlaskaFri, Apr 7, 2:50 AM HADT · 1273 days ago · 5 km deep · 2 km away
60. 2.7100 km W of Adak, AlaskaFri, Apr 7, 8:07 AM HADT · 1273 days ago · 5 km deep · 1 km away

The first 60 of at least 201.

Before

1. 1.9Andreanof Islands, Aleutian Islands, AlaskaFri, Mar 31, 3:15 PM HADT · 1280 days ago · 1 km deep · 0 km away
2. 2.7101 km W of Adak, AlaskaFri, Mar 31, 9:54 AM HADT · 1280 days ago · 5 km deep · 9 km away
3. 1.999 km W of Adak, AlaskaFri, Mar 31, 8:49 AM HADT · 1280 days ago · 4 km deep · 1 km away
4. 1.999 km W of Adak, AlaskaFri, Mar 31, 8:17 AM HADT · 1280 days ago · 3 km deep · 1 km away
5. 2.099 km W of Adak, AlaskaFri, Mar 31, 8:17 AM HADT · 1280 days ago · 4 km deep · 1 km away
6. 2.199 km W of Adak, AlaskaFri, Mar 31, 8:17 AM HADT · 1280 days ago · 4 km deep · 1 km away
7. 1.693 km SW of Adak, AlaskaFri, Mar 31, 2:18 AM HADT · 1280 days ago · 45 km deep · 57 km away
8. 1.5Andreanof Islands, Aleutian Islands, AlaskaThu, Mar 30, 10:36 PM HADT · 1280 days ago · 26 km deep · 76 km away
9. 1.999 km W of Adak, AlaskaThu, Mar 30, 9:54 PM HADT · 1280 days ago · 5 km deep · 1 km away
10. 1.7139 km WSW of Adak, AlaskaThu, Mar 30, 9:31 PM HADT · 1280 days ago · 26 km deep · 69 km away
11. 1.928 km S of Adak, AlaskaThu, Mar 30, 8:21 PM HADT · 1280 days ago · 63 km deep · 98 km away
12. 3.291 km SW of Adak, AlaskaThu, Mar 30, 3:09 PM HADT · 1281 days ago · 35 km deep · 61 km away
13. 1.8100 km W of Adak, AlaskaThu, Mar 30, 1:07 PM HADT · 1281 days ago · 7 km deep · 3 km away
14. 2.9149 km WSW of Adak, AlaskaThu, Mar 30, 7:05 AM HADT · 1281 days ago · 33 km deep · 80 km away
15. 2.9Andreanof Islands, Aleutian Islands, AlaskaThu, Mar 30, 4:39 AM HADT · 1281 days ago · 35 km deep · 72 km away
16. 1.798 km W of Adak, AlaskaThu, Mar 30, 4:18 AM HADT · 1281 days ago · -2 km deep · 1 km away
17. 1.797 km W of Adak, AlaskaThu, Mar 30, 4:18 AM HADT · 1281 days ago · 4 km deep · 2 km away
18. 1.9146 km WSW of Adak, AlaskaWed, Mar 29, 11:25 PM HADT · 1281 days ago · 5 km deep · 59 km away
19. 1.699 km W of Adak, AlaskaWed, Mar 29, 6:19 PM HADT · 1281 days ago · 4 km deep · 0 km away
20. 1.697 km W of Adak, AlaskaWed, Mar 29, 5:41 PM HADT · 1282 days ago · -2 km deep · 3 km away

From the USGS Earthquake Hazards Program and its partner networks, event av91828686. Read Thu, Oct 1, 2026, 2:14 PM UTC.