M1.8 earthquake 175 km WSW of Adak, Alaska

Magnitude

1.8 (ml), micro

Local time

Wed, Aug 18, 2021, 6:20 PM HADT

UTC

2021-08-19 03:20:24 UTC

Depth

71.7 km (44.6 mi), intermediate-depth

Epicenter

51.500° N, 179.104° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Stations used

38

After

1. 1.6219 km W of Adak, AlaskaThu, Aug 19, 8:30 AM HADT · 1866 days ago · 92 km deep · 58 km away
2. 1.6197 km WSW of Adak, AlaskaThu, Aug 19, 9:53 AM HADT · 1866 days ago · 75 km deep · 22 km away
3. 2.9113 km WSW of Adak, AlaskaThu, Aug 19, 11:16 AM HADT · 1866 days ago · 66 km deep · 65 km away
4. 1.7120 km WSW of Adak, AlaskaThu, Aug 19, 5:36 PM HADT · 1865 days ago · 66 km deep · 57 km away
5. 3.6262 km W of Adak, AlaskaFri, Aug 20, 6:10 PM GMT+12 · 1865 days ago · 80 km deep · 92 km away
6. 1.9156 km WSW of Adak, AlaskaThu, Aug 19, 10:20 PM HADT · 1865 days ago · 17 km deep · 57 km away
7. 2.9256 km WSW of Adak, AlaskaSat, Aug 21, 9:32 AM GMT+12 · 1865 days ago · 25 km deep · 81 km away
8. 3.8272 km WSW of Adak, AlaskaSat, Aug 21, 10:17 AM GMT+12 · 1865 days ago · 26 km deep · 97 km away
9. 2.5246 km WSW of Adak, AlaskaSat, Aug 21, 3:57 PM GMT-12 · 1863 days ago · 10 km deep · 77 km away
10. 4.8128 km WSW of Adak, AlaskaSun, Aug 22, 2:45 AM HADT · 1863 days ago · 52 km deep · 55 km away · felt by 1
11. 4.0131 km WSW of Adak, AlaskaSun, Aug 22, 2:46 AM HADT · 1863 days ago · 35 km deep · 59 km away
12. 2.8132 km WSW of Adak, AlaskaSun, Aug 22, 2:47 AM HADT · 1863 days ago · 35 km deep · 57 km away
13. 3.4133 km WSW of Adak, AlaskaSun, Aug 22, 2:50 AM HADT · 1863 days ago · 35 km deep · 60 km away
14. 1.8133 km WSW of Adak, AlaskaSun, Aug 22, 2:53 AM HADT · 1863 days ago · 25 km deep · 60 km away
15. 1.5132 km WSW of Adak, AlaskaSun, Aug 22, 3:05 AM HADT · 1863 days ago · 25 km deep · 61 km away
16. 2.5135 km WSW of Adak, AlaskaSun, Aug 22, 4:32 AM HADT · 1863 days ago · 35 km deep · 61 km away
17. 1.5133 km WSW of Adak, AlaskaSun, Aug 22, 6:17 AM HADT · 1863 days ago · 26 km deep · 60 km away
18. 1.5133 km WSW of Adak, AlaskaSun, Aug 22, 8:39 AM HADT · 1863 days ago · 7 km deep · 43 km away
19. 1.9203 km W of Adak, AlaskaSun, Aug 22, 3:39 PM HADT · 1862 days ago · 119 km deep · 55 km away
20. 1.7132 km WSW of Adak, AlaskaMon, Aug 23, 10:57 AM HADT · 1862 days ago · 27 km deep · 60 km away
21. 1.6247 km WSW of Adak, AlaskaTue, Aug 24, 9:11 AM GMT+12 · 1862 days ago · 63 km deep · 73 km away
22. 1.8106 km WSW of Adak, AlaskaMon, Aug 23, 2:28 PM HADT · 1862 days ago · 26 km deep · 83 km away
23. 1.5121 km SW of Adak, AlaskaMon, Aug 23, 5:48 PM HADT · 1861 days ago · 25 km deep · 84 km away
24. 1.9194 km WSW of Adak, AlaskaMon, Aug 23, 6:57 PM HADT · 1861 days ago · 13 km deep · 45 km away
25. 1.9135 km WSW of Adak, AlaskaTue, Aug 24, 3:05 AM HADT · 1861 days ago · 35 km deep · 58 km away
26. 3.6134 km WSW of Adak, AlaskaTue, Aug 24, 9:33 AM HADT · 1861 days ago · 41 km deep · 59 km away
27. 1.9201 km WSW of Adak, AlaskaTue, Aug 24, 12:02 PM HADT · 1861 days ago · 70 km deep · 26 km away
28. 1.7266 km WSW of Adak, AlaskaWed, Aug 25, 4:50 PM GMT+12 · 1860 days ago · 19 km deep · 91 km away
29. 3.4142 km WSW of Adak, AlaskaWed, Aug 25, 2:08 PM HADT · 1860 days ago · 17 km deep · 43 km away
30. 1.8137 km WSW of Adak, AlaskaWed, Aug 25, 3:59 PM HADT · 1859 days ago · 9 km deep · 40 km away
31. 1.5139 km WSW of Adak, AlaskaWed, Aug 25, 4:36 PM HADT · 1859 days ago · 22 km deep · 40 km away
32. 1.6141 km WSW of Adak, AlaskaWed, Aug 25, 9:06 PM HADT · 1859 days ago · 13 km deep · 38 km away
33. 1.9217 km WSW of Adak, AlaskaThu, Aug 26, 1:04 AM HADT · 1859 days ago · 6 km deep · 66 km away
34. 3.1248 km W of Adak, AlaskaFri, Aug 27, 7:07 AM GMT+12 · 1859 days ago · 77 km deep · 77 km away
35. 1.5171 km W of Adak, AlaskaFri, Aug 27, 1:13 PM HADT · 1858 days ago · 5 km deep · 26 km away
36. 3.2122 km SW of Adak, AlaskaSat, Aug 28, 1:14 AM HADT · 1857 days ago · 27 km deep · 86 km away
37. 1.5254 km WSW of Adak, AlaskaSat, Aug 28, 11:38 PM GMT+12 · 1857 days ago · 16 km deep · 79 km away
38. 2.687 km WSW of Adak, AlaskaSat, Aug 28, 9:57 AM HADT · 1857 days ago · 33 km deep · 95 km away
39. 1.9141 km WSW of Adak, AlaskaSat, Aug 28, 2:03 PM HADT · 1857 days ago · 9 km deep · 39 km away
40. 1.597 km WSW of Adak, AlaskaSat, Aug 28, 2:05 PM HADT · 1857 days ago · 73 km deep · 79 km away
41. 1.8211 km W of Adak, AlaskaSat, Aug 28, 6:19 PM HADT · 1856 days ago · 92 km deep · 47 km away
42. 1.9230 km W of Adak, AlaskaSat, Aug 28, 8:03 PM HADT · 1856 days ago · 93 km deep · 67 km away
43. 1.8145 km WSW of Adak, AlaskaSun, Aug 29, 3:41 AM HADT · 1856 days ago · 23 km deep · 57 km away
44. 2.5141 km WSW of Adak, AlaskaSun, Aug 29, 8:29 PM HADT · 1855 days ago · 30 km deep · 44 km away
45. 1.9111 km WSW of Adak, AlaskaSun, Aug 29, 8:57 PM HADT · 1855 days ago · 13 km deep · 67 km away
46. 1.9192 km W of Adak, AlaskaMon, Aug 30, 12:21 PM HADT · 1855 days ago · 148 km deep · 76 km away
47. 1.9243 km W of Adak, AlaskaTue, Aug 31, 3:30 PM GMT+12 · 1854 days ago · 70 km deep · 74 km away
48. 1.7215 km WSW of Adak, AlaskaTue, Aug 31, 9:40 AM HADT · 1854 days ago · 14 km deep · 56 km away
49. 1.9257 km WSW of Adak, AlaskaThu, Sep 2, 6:05 PM GMT+12 · 1852 days ago · 57 km deep · 82 km away
50. 1.5253 km WSW of Adak, AlaskaWed, Sep 1, 7:36 PM GMT-12 · 1852 days ago · 6 km deep · 85 km away
51. 1.6248 km WSW of Adak, AlaskaThu, Sep 2, 7:46 PM GMT+12 · 1852 days ago · 48 km deep · 73 km away
52. 1.6194 km WSW of Adak, AlaskaWed, Sep 1, 11:00 PM HADT · 1852 days ago · 5 km deep · 48 km away
53. 2.6221 km WSW of Adak, AlaskaThu, Sep 2, 3:19 AM HADT · 1852 days ago · 88 km deep · 46 km away
54. 1.5272 km W of Adak, AlaskaFri, Sep 3, 2:34 AM GMT+12 · 1852 days ago · 70 km deep · 100 km away
55. 1.6232 km WSW of Adak, AlaskaFri, Sep 3, 1:30 AM HADT · 1851 days ago · 11 km deep · 58 km away
56. 1.5Andreanof Islands, Aleutian Islands, AlaskaFri, Sep 3, 3:43 AM HADT · 1851 days ago · 42 km deep · 20 km away
57. 1.9232 km WSW of Adak, AlaskaFri, Sep 3, 6:10 AM HADT · 1851 days ago · 7 km deep · 58 km away
58. 1.6234 km WSW of Adak, AlaskaFri, Sep 3, 6:11 AM HADT · 1851 days ago · 13 km deep · 60 km away
59. 1.5124 km WSW of Adak, AlaskaFri, Sep 3, 6:19 AM HADT · 1851 days ago · 7 km deep · 52 km away
60. 1.8231 km WSW of Adak, AlaskaFri, Sep 3, 8:43 AM HADT · 1851 days ago · 13 km deep · 58 km away

The first 60 of 175.

Before

1. 3.6141 km WSW of Adak, AlaskaWed, Aug 18, 1:26 PM HADT · 1867 days ago · 31 km deep · 52 km away
2. 2.5135 km WSW of Adak, AlaskaWed, Aug 18, 11:12 AM HADT · 1867 days ago · 35 km deep · 63 km away
3. 1.6121 km W of Adak, AlaskaWed, Aug 18, 5:17 AM HADT · 1867 days ago · 92 km deep · 56 km away
4. 2.6257 km W of Adak, AlaskaWed, Aug 18, 9:10 PM GMT+12 · 1867 days ago · 10 km deep · 99 km away
5. 1.8243 km WSW of Adak, AlaskaTue, Aug 17, 8:48 PM GMT-12 · 1867 days ago · 39 km deep · 71 km away
6. 1.9241 km WSW of Adak, AlaskaTue, Aug 17, 8:41 PM GMT-12 · 1867 days ago · 26 km deep · 74 km away
7. 2.3169 km W of Adak, AlaskaTue, Aug 17, 6:25 PM HADT · 1867 days ago · 243 km deep · 46 km away
8. 2.1128 km SW of Adak, AlaskaTue, Aug 17, 2:13 PM HADT · 1868 days ago · 26 km deep · 80 km away
9. 3.2216 km WSW of Adak, AlaskaTue, Aug 17, 10:27 AM HADT · 1868 days ago · 35 km deep · 41 km away
10. 1.6132 km WSW of Adak, AlaskaTue, Aug 17, 9:16 AM HADT · 1868 days ago · 7 km deep · 43 km away
11. 1.9246 km WSW of Adak, AlaskaTue, Aug 17, 1:27 AM GMT-12 · 1868 days ago · 26 km deep · 81 km away
12. 1.5267 km W of Adak, AlaskaTue, Aug 17, 10:27 PM GMT+12 · 1868 days ago · 67 km deep · 96 km away
13. 1.6256 km W of Adak, AlaskaTue, Aug 17, 10:06 PM GMT+12 · 1868 days ago · 15 km deep · 99 km away
14. 3.2196 km WSW of Adak, AlaskaMon, Aug 16, 7:23 AM HADT · 1869 days ago · 35 km deep · 47 km away
15. 1.793 km WSW of Adak, AlaskaMon, Aug 16, 2:35 AM HADT · 1869 days ago · 13 km deep · 86 km away
16. 1.7228 km WSW of Adak, AlaskaSun, Aug 15, 8:44 PM HADT · 1869 days ago · 19 km deep · 54 km away
17. 1.8216 km W of Adak, AlaskaSun, Aug 15, 7:39 PM HADT · 1869 days ago · 74 km deep · 47 km away
18. 3.1216 km WSW of Adak, AlaskaSun, Aug 15, 7:04 AM HADT · 1870 days ago · 12 km deep · 61 km away
19. 1.8134 km SW of Adak, AlaskaSat, Aug 14, 7:50 PM HADT · 1870 days ago · 26 km deep · 77 km away
20. 1.7134 km SW of Adak, AlaskaSat, Aug 14, 7:49 PM HADT · 1870 days ago · 18 km deep · 85 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak021am31t60. Read Mon, Sep 28, 2026, 11:55 AM UTC.