M1.9 earthquake 99 km W of Adak, Alaska

Magnitude

1.9 (ML, local (Richter)), micro

Magnitude from

AV

Local time

Mon, Apr 17, 2023, 4:48 PM HADT

UTC

2023-04-18 01:48:28 UTC

Depth

3.4 km (2.1 mi), shallow

Epicenter

51.852° N, 178.076° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.6 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.25

Depth from

From location

Station coverage gap

205°, poorly surrounded by stations

Stations used

5

After

1. 1.9Andreanof Islands, Aleutian Islands, AlaskaMon, Apr 17, 7:04 PM HADT · 1264 days ago · 4 km deep · 2 km away
2. 3.196 km W of Adak, AlaskaMon, Apr 17, 10:59 PM HADT · 1264 days ago · 5 km deep · 12 km away
3. 1.897 km W of Adak, AlaskaMon, Apr 17, 11:39 PM HADT · 1264 days ago · -2 km deep · 2 km away
4. 3.5112 km SW of Adak, AlaskaTue, Apr 18, 12:57 AM HADT · 1264 days ago · 35 km deep · 80 km away
5. 1.799 km W of Adak, AlaskaTue, Apr 18, 8:22 PM HADT · 1263 days ago · -2 km deep · 1 km away
6. 2.396 km W of Adak, AlaskaWed, Apr 19, 1:37 AM HADT · 1263 days ago · 4 km deep · 3 km away
7. 2.197 km W of Adak, AlaskaWed, Apr 19, 3:19 AM HADT · 1263 days ago · -2 km deep · 3 km away
8. 2.0134 km W of Adak, AlaskaWed, Apr 19, 8:10 AM HADT · 1263 days ago · 20 km deep · 35 km away
9. 2.297 km W of Adak, AlaskaWed, Apr 19, 3:00 PM HADT · 1262 days ago · 3 km deep · 3 km away
10. 1.696 km W of Adak, AlaskaWed, Apr 19, 3:01 PM HADT · 1262 days ago · -1 km deep · 3 km away
11. 2.397 km W of Adak, AlaskaWed, Apr 19, 3:18 PM HADT · 1262 days ago · 3 km deep · 2 km away
12. 2.296 km W of Adak, AlaskaWed, Apr 19, 3:48 PM HADT · 1262 days ago · 4 km deep · 3 km away
13. 1.6103 km W of Adak, AlaskaWed, Apr 19, 5:23 PM HADT · 1262 days ago · 7 km deep · 5 km away
14. 1.6Andreanof Islands, Aleutian Islands, AlaskaWed, Apr 19, 7:12 PM HADT · 1262 days ago · -1 km deep · 3 km away
15. 2.236 km W of Adak, AlaskaWed, Apr 19, 7:26 PM HADT · 1262 days ago · 88 km deep · 63 km away
16. 1.798 km W of Adak, AlaskaWed, Apr 19, 7:45 PM HADT · 1262 days ago · 3 km deep · 1 km away
17. 1.796 km W of Adak, AlaskaWed, Apr 19, 9:02 PM HADT · 1262 days ago · 0 km deep · 3 km away
18. 1.696 km W of Adak, AlaskaWed, Apr 19, 11:33 PM HADT · 1262 days ago · -1 km deep · 3 km away
19. 3.2Andreanof Islands, Aleutian Islands, AlaskaThu, Apr 20, 2:33 AM HADT · 1262 days ago · 35 km deep · 64 km away
20. 2.497 km W of Adak, AlaskaThu, Apr 20, 4:18 AM HADT · 1262 days ago · -2 km deep · 3 km away
21. 1.9132 km WSW of Adak, AlaskaThu, Apr 20, 8:13 AM HADT · 1262 days ago · 12 km deep · 42 km away
22. 1.9110 km WSW of Adak, AlaskaThu, Apr 20, 1:01 PM HADT · 1261 days ago · 19 km deep · 38 km away
23. 1.796 km W of Adak, AlaskaThu, Apr 20, 2:33 PM HADT · 1261 days ago · -2 km deep · 3 km away
24. 1.8Andreanof Islands, Aleutian Islands, AlaskaThu, Apr 20, 2:52 PM HADT · 1261 days ago · 4 km deep · 4 km away
25. 2.2Andreanof Islands, Aleutian Islands, AlaskaThu, Apr 20, 3:15 PM HADT · 1261 days ago · 2 km deep · 1 km away
26. 2.5Andreanof Islands, Aleutian Islands, AlaskaThu, Apr 20, 4:12 PM HADT · 1261 days ago · 5 km deep · 1 km away
27. 2.0Andreanof Islands, Aleutian Islands, AlaskaThu, Apr 20, 4:12 PM HADT · 1261 days ago · 3 km deep · 1 km away
28. 3.395 km W of Adak, AlaskaThu, Apr 20, 9:58 PM HADT · 1261 days ago · 5 km deep · 5 km away
29. 1.799 km W of Adak, AlaskaFri, Apr 21, 3:43 AM HADT · 1261 days ago · 4 km deep · 0 km away
30. 2.295 km W of Adak, AlaskaFri, Apr 21, 4:22 AM HADT · 1261 days ago · 5 km deep · 4 km away
31. 2.0Andreanof Islands, Aleutian Islands, AlaskaFri, Apr 21, 5:18 AM HADT · 1261 days ago · 3 km deep · 2 km away
32. 2.5119 km WSW of Adak, AlaskaFri, Apr 21, 8:30 AM HADT · 1261 days ago · 34 km deep · 42 km away
33. 1.697 km W of Adak, AlaskaFri, Apr 21, 3:03 PM HADT · 1260 days ago · -1 km deep · 2 km away
34. 1.596 km W of Adak, AlaskaFri, Apr 21, 3:13 PM HADT · 1260 days ago · -2 km deep · 3 km away
35. 3.1154 km SW of Adak, AlaskaFri, Apr 21, 3:16 PM HADT · 1260 days ago · 35 km deep · 90 km away
36. 1.870 km SSW of Adak, AlaskaFri, Apr 21, 5:49 PM HADT · 1260 days ago · 19 km deep · 97 km away
37. 2.333 km NNW of Adak, AlaskaFri, Apr 21, 8:25 PM HADT · 1260 days ago · 170 km deep · 98 km away
38. 1.9128 km WSW of Adak, AlaskaFri, Apr 21, 10:52 PM HADT · 1260 days ago · 9 km deep · 35 km away
39. 1.596 km W of Adak, AlaskaFri, Apr 21, 11:53 PM HADT · 1260 days ago · -1 km deep · 3 km away
40. 1.899 km W of Adak, AlaskaSat, Apr 22, 10:06 AM HADT · 1260 days ago · -2 km deep · 1 km away
41. 3.390 km SW of Adak, AlaskaSat, Apr 22, 5:32 PM HADT · 1259 days ago · 35 km deep · 59 km away
42. 3.2121 km WSW of Adak, AlaskaSat, Apr 22, 7:46 PM HADT · 1259 days ago · 35 km deep · 46 km away
43. 1.899 km W of Adak, AlaskaSun, Apr 23, 6:30 AM HADT · 1259 days ago · 3 km deep · 1 km away
44. 1.798 km W of Adak, AlaskaSun, Apr 23, 6:42 AM HADT · 1259 days ago · -2 km deep · 1 km away
45. 1.699 km W of Adak, AlaskaSun, Apr 23, 7:20 AM HADT · 1259 days ago · -2 km deep · 2 km away
46. 3.277 km SW of Adak, AlaskaSun, Apr 23, 11:05 AM HADT · 1258 days ago · 54 km deep · 63 km away
47. 2.779 km WSW of Adak, AlaskaSun, Apr 23, 1:08 PM HADT · 1258 days ago · 68 km deep · 48 km away
48. 1.996 km W of Adak, AlaskaSun, Apr 23, 4:03 PM HADT · 1258 days ago · -2 km deep · 4 km away
49. 2.0141 km WSW of Adak, AlaskaMon, Apr 24, 1:09 AM HADT · 1258 days ago · 17 km deep · 70 km away
50. 2.654 km WSW of Adak, AlaskaMon, Apr 24, 5:46 AM HADT · 1258 days ago · 74 km deep · 55 km away
51. 1.599 km W of Adak, AlaskaMon, Apr 24, 6:13 AM HADT · 1258 days ago · 4 km deep · 0 km away
52. 2.395 km W of Adak, AlaskaMon, Apr 24, 8:19 AM HADT · 1258 days ago · 3 km deep · 4 km away
53. 1.599 km W of Adak, AlaskaMon, Apr 24, 10:32 AM HADT · 1257 days ago · 3 km deep · 1 km away
54. 1.6100 km W of Adak, AlaskaTue, Apr 25, 9:42 AM HADT · 1257 days ago · 5 km deep · 1 km away
55. 1.8Andreanof Islands, Aleutian Islands, AlaskaTue, Apr 25, 10:12 AM HADT · 1257 days ago · 26 km deep · 78 km away
56. 3.950 km SSW of Adak, AlaskaTue, Apr 25, 2:05 PM HADT · 1256 days ago · 51 km deep · 84 km away
57. 2.8112 km WSW of Adak, AlaskaTue, Apr 25, 2:53 PM HADT · 1256 days ago · 19 km deep · 41 km away
58. 2.1154 km WSW of Adak, AlaskaTue, Apr 25, 6:50 PM HADT · 1256 days ago · 31 km deep · 69 km away
59. 1.7100 km W of Adak, AlaskaTue, Apr 25, 8:08 PM HADT · 1256 days ago · 4 km deep · 1 km away
60. 2.499 km W of Adak, AlaskaTue, Apr 25, 8:10 PM HADT · 1256 days ago · 9 km deep · 4 km away

The first 60 of at least 201.

Before

1. 1.9Andreanof Islands, Aleutian Islands, AlaskaMon, Apr 17, 4:44 PM HADT · 1264 days ago · 3 km deep · 1 km away
2. 2.7102 km W of Adak, AlaskaMon, Apr 17, 4:43 PM HADT · 1264 days ago · 5 km deep · 4 km away
3. 2.3100 km W of Adak, AlaskaMon, Apr 17, 4:43 PM HADT · 1264 days ago · 3 km deep · 1 km away
4. 2.2Andreanof Islands, Aleutian Islands, AlaskaMon, Apr 17, 4:18 PM HADT · 1264 days ago · 4 km deep · 2 km away
5. 1.6100 km W of Adak, AlaskaMon, Apr 17, 4:16 PM HADT · 1264 days ago · 3 km deep · 1 km away
6. 1.7100 km W of Adak, AlaskaMon, Apr 17, 12:26 PM HADT · 1264 days ago · 4 km deep · 1 km away
7. 2.9Andreanof Islands, Aleutian Islands, AlaskaMon, Apr 17, 9:18 AM HADT · 1265 days ago · 31 km deep · 74 km away
8. 2.1113 km WSW of Adak, AlaskaMon, Apr 17, 7:46 AM HADT · 1265 days ago · 17 km deep · 41 km away
9. 1.698 km W of Adak, AlaskaMon, Apr 17, 12:47 AM HADT · 1265 days ago · 3 km deep · 0 km away
10. 2.097 km W of Adak, AlaskaSun, Apr 16, 8:51 PM HADT · 1265 days ago · -2 km deep · 1 km away
11. 3.059 km SSW of Adak, AlaskaSun, Apr 16, 8:44 PM HADT · 1265 days ago · 35 km deep · 97 km away
12. 2.496 km W of Adak, AlaskaSun, Apr 16, 8:37 PM HADT · 1265 days ago · 2 km deep · 2 km away
13. 2.297 km W of Adak, AlaskaSun, Apr 16, 8:36 PM HADT · 1265 days ago · 4 km deep · 2 km away
14. 2.297 km W of Adak, AlaskaSun, Apr 16, 8:15 PM HADT · 1265 days ago · 4 km deep · 2 km away
15. 1.8Andreanof Islands, Aleutian Islands, AlaskaSun, Apr 16, 7:54 PM HADT · 1265 days ago · 17 km deep · 9 km away
16. 2.8Andreanof Islands, Aleutian Islands, AlaskaSun, Apr 16, 7:16 PM HADT · 1265 days ago · 21 km deep · 72 km away
17. 1.6Andreanof Islands, Aleutian Islands, AlaskaSun, Apr 16, 6:54 PM HADT · 1265 days ago · -2 km deep · 2 km away
18. 1.697 km W of Adak, AlaskaSun, Apr 16, 6:53 PM HADT · 1265 days ago · -2 km deep · 2 km away
19. 1.697 km W of Adak, AlaskaSun, Apr 16, 6:23 PM HADT · 1265 days ago · -2 km deep · 2 km away
20. 1.797 km W of Adak, AlaskaSun, Apr 16, 6:23 PM HADT · 1265 days ago · -2 km deep · 2 km away

From the USGS Earthquake Hazards Program and its partner networks, event av91853276. Read Sat, Oct 3, 2026, 6:52 AM UTC.