M1.8 earthquake 171 km WSW of Adak, Alaska

Magnitude

1.8 (ML, local (Richter)), micro

Magnitude from

Alaska Earthquake Center

Local time

Mon, Aug 21, 2023, 6:22 PM HADT

UTC

2023-08-22 03:22:01 UTC

Depth

31.8 km (19.8 mi), shallow

Epicenter

51.368° N, 178.969° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Stations used

22

After

1. 3.373 km WSW of Adak, AlaskaTue, Aug 22, 1:08 AM HADT · 1140 days ago · 75 km deep · 97 km away
2. 2.8Rat Islands, Aleutian Islands, AlaskaTue, Aug 22, 1:37 AM HADT · 1140 days ago · 98 km deep · 84 km away
3. 3.8245 km WSW of Adak, AlaskaWed, Aug 23, 2:31 AM GMT+12 · 1140 days ago · 68 km deep · 77 km away
4. 1.7242 km WSW of Adak, AlaskaWed, Aug 23, 3:44 AM GMT+12 · 1140 days ago · 52 km deep · 75 km away
5. 3.8244 km WSW of Adak, AlaskaWed, Aug 23, 10:49 AM GMT+12 · 1140 days ago · 52 km deep · 76 km away
6. 2.2243 km WSW of Adak, AlaskaWed, Aug 23, 10:54 AM GMT+12 · 1140 days ago · 57 km deep · 77 km away
7. 1.6156 km WSW of Adak, AlaskaTue, Aug 22, 7:15 PM HADT · 1139 days ago · 25 km deep · 33 km away
8. 1.7156 km W of Adak, AlaskaWed, Aug 23, 12:19 AM HADT · 1139 days ago · 91 km deep · 48 km away
9. 3.4108 km SW of Adak, AlaskaWed, Aug 23, 12:56 AM HADT · 1139 days ago · 35 km deep · 79 km away
10. 2.1242 km WSW of Adak, AlaskaWed, Aug 23, 11:11 PM GMT+12 · 1139 days ago · 60 km deep · 76 km away
11. 1.6106 km WSW of Adak, AlaskaWed, Aug 23, 4:33 AM HADT · 1139 days ago · 68 km deep · 65 km away
12. 2.0128 km WSW of Adak, AlaskaWed, Aug 23, 9:11 AM HADT · 1139 days ago · 24 km deep · 44 km away
13. 1.6234 km WSW of Adak, AlaskaWed, Aug 23, 2:13 PM HADT · 1139 days ago · 16 km deep · 63 km away
14. 1.6152 km WSW of Adak, AlaskaWed, Aug 23, 6:56 PM HADT · 1138 days ago · 11 km deep · 20 km away
15. 3.0Andreanof Islands, Aleutian Islands, AlaskaThu, Aug 24, 12:10 AM HADT · 1138 days ago · 35 km deep · 26 km away
16. 1.5170 km WSW of Adak, AlaskaThu, Aug 24, 2:15 AM HADT · 1138 days ago · 29 km deep · 2 km away
17. 1.7194 km WSW of Adak, AlaskaThu, Aug 24, 7:24 AM HADT · 1138 days ago · 17 km deep · 30 km away
18. 1.5109 km WSW of Adak, AlaskaThu, Aug 24, 7:28 AM HADT · 1138 days ago · 13 km deep · 62 km away
19. 1.6176 km WSW of Adak, AlaskaThu, Aug 24, 8:35 AM HADT · 1138 days ago · 24 km deep · 11 km away
20. 1.6127 km WSW of Adak, AlaskaThu, Aug 24, 12:24 PM HADT · 1138 days ago · 17 km deep · 45 km away
21. 1.9127 km WSW of Adak, AlaskaThu, Aug 24, 11:39 PM HADT · 1137 days ago · 8 km deep · 45 km away
22. 1.887 km SW of Adak, AlaskaFri, Aug 25, 7:59 AM HADT · 1137 days ago · 32 km deep · 93 km away
23. 1.9235 km W of Adak, AlaskaFri, Aug 25, 12:03 PM HADT · 1137 days ago · 22 km deep · 80 km away
24. 2.1Andreanof Islands, Aleutian Islands, AlaskaSat, Aug 26, 12:45 AM HADT · 1136 days ago · 13 km deep · 79 km away
25. 2.0138 km SW of Adak, AlaskaSat, Aug 26, 4:19 AM HADT · 1136 days ago · 26 km deep · 96 km away
26. 2.1227 km WSW of Adak, AlaskaSat, Aug 26, 10:45 PM HADT · 1135 days ago · 13 km deep · 56 km away
27. 2.0235 km WSW of Adak, AlaskaSat, Aug 26, 10:52 PM HADT · 1135 days ago · 16 km deep · 65 km away
28. 1.8110 km SW of Adak, AlaskaSat, Aug 26, 11:16 PM HADT · 1135 days ago · 26 km deep · 78 km away
29. 3.0100 km SW of Adak, AlaskaSat, Aug 26, 11:33 PM HADT · 1135 days ago · 35 km deep · 94 km away
30. 1.6232 km WSW of Adak, AlaskaSun, Aug 27, 2:54 AM HADT · 1135 days ago · 26 km deep · 62 km away
31. 2.1234 km WSW of Adak, AlaskaSun, Aug 27, 3:09 AM HADT · 1135 days ago · 7 km deep · 70 km away
32. 1.6128 km WSW of Adak, AlaskaSun, Aug 27, 8:21 AM HADT · 1135 days ago · 25 km deep · 45 km away
33. 1.8209 km W of Adak, AlaskaSun, Aug 27, 8:33 AM HADT · 1135 days ago · 67 km deep · 56 km away
34. 1.893 km W of Adak, AlaskaSun, Aug 27, 8:46 AM HADT · 1135 days ago · 93 km deep · 99 km away
35. 2.0222 km W of Adak, AlaskaSun, Aug 27, 9:26 AM HADT · 1135 days ago · 97 km deep · 79 km away
36. 2.2166 km WSW of Adak, AlaskaMon, Aug 28, 2:05 AM HADT · 1134 days ago · 19 km deep · 31 km away
37. 2.7213 km W of Adak, AlaskaMon, Aug 28, 2:11 AM HADT · 1134 days ago · 98 km deep · 69 km away
38. 1.7134 km WSW of Adak, AlaskaMon, Aug 28, 3:33 AM HADT · 1134 days ago · 21 km deep · 40 km away
39. 2.3200 km W of Adak, AlaskaMon, Aug 28, 5:52 AM HADT · 1134 days ago · 75 km deep · 52 km away
40. 1.984 km WSW of Adak, AlaskaMon, Aug 28, 9:48 AM HADT · 1134 days ago · 13 km deep · 91 km away
41. 2.0143 km WSW of Adak, AlaskaMon, Aug 28, 3:14 PM HADT · 1133 days ago · 5 km deep · 28 km away
42. 1.9113 km WSW of Adak, AlaskaMon, Aug 28, 3:35 PM HADT · 1133 days ago · 16 km deep · 57 km away
43. 2.4200 km WSW of Adak, AlaskaMon, Aug 28, 3:40 PM HADT · 1133 days ago · 53 km deep · 31 km away
44. 2.0149 km WSW of Adak, AlaskaMon, Aug 28, 9:20 PM HADT · 1133 days ago · 11 km deep · 21 km away
45. 1.982 km WSW of Adak, AlaskaTue, Aug 29, 5:49 AM HADT · 1133 days ago · 36 km deep · 90 km away
46. 1.7238 km W of Adak, AlaskaTue, Aug 29, 6:24 AM HADT · 1133 days ago · 9 km deep · 85 km away
47. 2.1244 km WSW of Adak, AlaskaWed, Aug 30, 6:58 AM GMT+12 · 1133 days ago · 11 km deep · 77 km away
48. 2.5138 km WSW of Adak, AlaskaWed, Aug 30, 8:18 AM HADT · 1132 days ago · 35 km deep · 40 km away
49. 4.7Andreanof Islands, Aleutian Islands, AlaskaWed, Aug 30, 10:13 PM HADT · 1131 days ago · 49 km deep · 32 km away
50. 3.0152 km WSW of Adak, AlaskaWed, Aug 30, 10:28 PM HADT · 1131 days ago · 35 km deep · 42 km away
51. 2.3175 km WSW of Adak, AlaskaThu, Aug 31, 3:20 AM HADT · 1131 days ago · 22 km deep · 23 km away
52. 2.2147 km WSW of Adak, AlaskaThu, Aug 31, 4:48 AM HADT · 1131 days ago · 32 km deep · 36 km away
53. 2.2110 km SW of Adak, AlaskaThu, Aug 31, 7:13 AM HADT · 1131 days ago · 32 km deep · 82 km away
54. 1.9187 km W of Adak, AlaskaThu, Aug 31, 11:56 AM HADT · 1131 days ago · 80 km deep · 45 km away
55. 2.3157 km WSW of Adak, AlaskaThu, Aug 31, 2:21 PM HADT · 1131 days ago · 35 km deep · 39 km away
56. 2.0141 km WSW of Adak, AlaskaThu, Aug 31, 10:02 PM HADT · 1130 days ago · 25 km deep · 38 km away
57. 1.975 km SW of Adak, AlaskaThu, Aug 31, 11:23 PM HADT · 1130 days ago · 59 km deep · 100 km away
58. 2.7148 km WSW of Adak, AlaskaFri, Sep 1, 4:00 PM HADT · 1129 days ago · 32 km deep · 41 km away
59. 1.9171 km WSW of Adak, AlaskaFri, Sep 1, 4:38 PM HADT · 1129 days ago · 13 km deep · 26 km away
60. 2.5141 km SW of Adak, AlaskaSat, Sep 2, 12:50 AM HADT · 1129 days ago · 35 km deep · 50 km away

The first 60 of at least 200.

Before

1. 2.0110 km WSW of Adak, AlaskaMon, Aug 21, 10:01 AM HADT · 1141 days ago · 7 km deep · 61 km away
2. 1.9Rat Islands, Aleutian Islands, AlaskaMon, Aug 21, 8:35 AM HADT · 1141 days ago · 13 km deep · 85 km away
3. 2.1Andreanof Islands, Aleutian Islands, AlaskaMon, Aug 21, 7:18 AM HADT · 1141 days ago · 37 km deep · 1 km away
4. 1.9235 km W of Adak, AlaskaMon, Aug 21, 6:56 AM HADT · 1141 days ago · 13 km deep · 86 km away
5. 2.0235 km W of Adak, AlaskaMon, Aug 21, 6:32 AM HADT · 1141 days ago · 13 km deep · 85 km away
6. 3.9233 km W of Adak, AlaskaMon, Aug 21, 5:45 AM HADT · 1141 days ago · 19 km deep · 82 km away
7. 2.1101 km W of Adak, AlaskaSun, Aug 20, 7:42 PM HADT · 1141 days ago · 6 km deep · 80 km away
8. 2.0Andreanof Islands, Aleutian Islands, AlaskaSun, Aug 20, 6:24 PM HADT · 1141 days ago · 23 km deep · 23 km away
9. 2.0144 km WSW of Adak, AlaskaSun, Aug 20, 6:15 PM HADT · 1141 days ago · 7 km deep · 35 km away
10. 2.1138 km WSW of Adak, AlaskaSun, Aug 20, 7:17 AM HADT · 1142 days ago · 23 km deep · 50 km away
11. 2.686 km WSW of Adak, AlaskaFri, Aug 18, 6:08 PM HADT · 1143 days ago · 35 km deep · 88 km away
12. 1.8168 km W of Adak, AlaskaFri, Aug 18, 3:05 PM HADT · 1144 days ago · 8 km deep · 43 km away
13. 1.584 km WSW of Adak, AlaskaFri, Aug 18, 1:59 PM HADT · 1144 days ago · 69 km deep · 86 km away
14. 3.1110 km WSW of Adak, AlaskaFri, Aug 18, 11:03 AM HADT · 1144 days ago · 63 km deep · 65 km away
15. 1.9264 km WSW of Adak, AlaskaSat, Aug 19, 5:34 AM GMT+12 · 1144 days ago · 12 km deep · 93 km away
16. 1.7118 km WSW of Adak, AlaskaFri, Aug 18, 6:24 AM HADT · 1144 days ago · 31 km deep · 58 km away
17. 3.2236 km W of Adak, AlaskaFri, Aug 18, 4:57 AM HADT · 1144 days ago · 68 km deep · 74 km away
18. 1.7232 km W of Adak, AlaskaFri, Aug 18, 2:52 AM HADT · 1144 days ago · 13 km deep · 81 km away
19. 1.6Andreanof Islands, Aleutian Islands, AlaskaThu, Aug 17, 6:44 PM HADT · 1144 days ago · 8 km deep · 46 km away
20. 2.1206 km WSW of Adak, AlaskaThu, Aug 17, 2:59 PM HADT · 1145 days ago · 26 km deep · 37 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak023ar1o87f. Read Mon, Oct 5, 2026, 11:39 AM UTC.