M1.8 earthquake 43 km WNW of Adak, Alaska

Magnitude

1.8 (ml), micro

Local time

Fri, Jul 31, 2020, 5:24 PM HADT

UTC

2020-08-01 02:24:05 UTC

Depth

13.2 km (8.2 mi), shallow

Epicenter

52.039° N, 177.200° W

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 2.6 km horizontally, 2.9 km in depth

Magnitude uncertainty

±0.26

Depth from

From location

Station coverage gap

335°, poorly surrounded by stations

Stations used

5

After

1. 2.549 km E of Adak, AlaskaFri, Jul 31, 9:23 PM HADT · 2250 days ago · 111 km deep · 88 km away
2. 1.540 km ENE of Adak, AlaskaFri, Jul 31, 9:42 PM HADT · 2250 days ago · 6 km deep · 75 km away
3. 2.939 km WSW of Adak, AlaskaSat, Aug 1, 2:22 AM HADT · 2250 days ago · 17 km deep · 40 km away
4. 1.551 km W of Adak, AlaskaSat, Aug 1, 11:54 AM HADT · 2250 days ago · 7 km deep · 23 km away
5. 1.540 km SSE of Adak, AlaskaSun, Aug 2, 4:08 AM HADT · 2249 days ago · 36 km deep · 80 km away
6. 3.41 km NW of Adak, AlaskaSun, Aug 2, 5:55 AM HADT · 2249 days ago · 93 km deep · 42 km away
7. 1.677 km WSW of Adak, AlaskaSun, Aug 2, 7:58 AM HADT · 2249 days ago · 40 km deep · 63 km away
8. 1.787 km SW of Adak, AlaskaSun, Aug 2, 7:00 PM HADT · 2248 days ago · 35 km deep · 75 km away
9. 1.758 km SSE of Adak, AlaskaSun, Aug 2, 9:19 PM HADT · 2248 days ago · 26 km deep · 96 km away
10. 2.818 km ENE of Adak, AlaskaMon, Aug 3, 4:41 AM HADT · 2248 days ago · 106 km deep · 58 km away
11. 2.584 km SW of Adak, AlaskaMon, Aug 3, 10:21 AM HADT · 2248 days ago · 36 km deep · 75 km away
12. 1.665 km SSE of Adak, AlaskaMon, Aug 3, 3:58 PM HADT · 2247 days ago · 20 km deep · 99 km away
13. 1.586 km W of Adak, AlaskaMon, Aug 3, 5:54 PM HADT · 2247 days ago · 5 km deep · 51 km away
14. 2.712 km S of Adak, AlaskaTue, Aug 4, 3:59 AM HADT · 2247 days ago · 84 km deep · 50 km away
15. 1.539 km S of Adak, AlaskaTue, Aug 4, 7:04 AM HADT · 2247 days ago · 40 km deep · 69 km away
16. 1.755 km SW of Adak, AlaskaTue, Aug 4, 11:38 AM HADT · 2247 days ago · 29 km deep · 57 km away
17. 1.888 km W of Adak, AlaskaThu, Aug 6, 12:27 AM HADT · 2245 days ago · 6 km deep · 53 km away
18. 1.687 km W of Adak, AlaskaThu, Aug 6, 2:31 AM HADT · 2245 days ago · 6 km deep · 52 km away
19. 1.687 km W of Adak, AlaskaThu, Aug 6, 2:32 AM HADT · 2245 days ago · 6 km deep · 52 km away
20. 1.787 km W of Adak, AlaskaThu, Aug 6, 3:27 AM HADT · 2245 days ago · 6 km deep · 52 km away
21. 1.688 km W of Adak, AlaskaThu, Aug 6, 8:48 AM HADT · 2245 days ago · 4 km deep · 53 km away
22. 1.650 km SSW of Adak, AlaskaThu, Aug 6, 11:26 AM HADT · 2245 days ago · 34 km deep · 68 km away
23. 2.0Andreanof Islands, Aleutian Islands, AlaskaThu, Aug 6, 4:59 PM HADT · 2244 days ago · 97 km deep · 53 km away
24. 1.6117 km WSW of Adak, AlaskaThu, Aug 6, 8:23 PM HADT · 2244 days ago · 61 km deep · 91 km away
25. 1.539 km SSE of Adak, AlaskaThu, Aug 6, 10:10 PM HADT · 2244 days ago · 35 km deep · 77 km away
26. 2.768 km WSW of Adak, AlaskaFri, Aug 7, 4:43 AM HADT · 2244 days ago · 10 km deep · 56 km away
27. 1.873 km W of Adak, AlaskaFri, Aug 7, 6:24 AM HADT · 2244 days ago · 153 km deep · 45 km away
28. 2.053 km S of Adak, AlaskaFri, Aug 7, 7:36 AM HADT · 2244 days ago · 26 km deep · 78 km away
29. 1.5129 km WSW of Adak, AlaskaSat, Aug 8, 2:13 PM HADT · 2243 days ago · 8 km deep · 99 km away
30. 3.656 km SSW of Adak, AlaskaSun, Aug 9, 4:43 AM HADT · 2242 days ago · 35 km deep · 68 km away
31. 1.575 km SW of Adak, AlaskaSun, Aug 9, 5:11 AM HADT · 2242 days ago · 25 km deep · 71 km away
32. 1.9129 km WSW of Adak, AlaskaSun, Aug 9, 4:27 PM HADT · 2241 days ago · 7 km deep · 99 km away
33. 1.663 km WSW of Adak, AlaskaMon, Aug 10, 1:54 AM HADT · 2241 days ago · 26 km deep · 50 km away
34. 1.979 km WSW of Adak, AlaskaMon, Aug 10, 11:38 AM HADT · 2241 days ago · 21 km deep · 67 km away
35. 1.583 km W of Adak, AlaskaMon, Aug 10, 12:28 PM HADT · 2241 days ago · 5 km deep · 49 km away
36. 1.892 km SW of Adak, AlaskaTue, Aug 11, 12:10 AM HADT · 2240 days ago · 28 km deep · 92 km away
37. 1.5106 km WSW of Adak, AlaskaTue, Aug 11, 5:41 AM HADT · 2240 days ago · 40 km deep · 85 km away
38. 1.859 km SE of Adak, AlaskaTue, Aug 11, 10:41 AM HADT · 2240 days ago · 53 km deep · 100 km away
39. 3.018 km S of Adak, AlaskaTue, Aug 11, 12:44 PM HADT · 2240 days ago · 69 km deep · 54 km away
40. 1.811 km S of Adak, AlaskaWed, Aug 12, 4:39 PM HADT · 2238 days ago · 84 km deep · 49 km away
41. 1.618 km SE of Adak, AlaskaWed, Aug 12, 6:25 PM HADT · 2238 days ago · 67 km deep · 61 km away
42. 1.796 km WSW of Adak, AlaskaThu, Aug 13, 2:26 AM HADT · 2238 days ago · 29 km deep · 79 km away
43. 3.2130 km WSW of Adak, AlaskaThu, Aug 13, 3:30 PM HADT · 2237 days ago · 88 km deep · 100 km away
44. 1.525 km NNE of Adak, AlaskaFri, Aug 14, 4:03 AM HADT · 2237 days ago · 161 km deep · 52 km away
45. 1.757 km SSE of Adak, AlaskaFri, Aug 14, 7:34 PM HADT · 2236 days ago · 22 km deep · 96 km away
46. 2.067 km NE of Adak, AlaskaSat, Aug 15, 12:56 AM HADT · 2236 days ago · 176 km deep · 95 km away
47. 1.588 km W of Adak, AlaskaSun, Aug 16, 12:44 AM HADT · 2235 days ago · 5 km deep · 54 km away
48. 1.780 km W of Adak, AlaskaSun, Aug 16, 3:17 PM HADT · 2234 days ago · 8 km deep · 46 km away
49. 2.842 km ENE of Adak, AlaskaSun, Aug 16, 5:17 PM HADT · 2234 days ago · 159 km deep · 78 km away
50. 3.8133 km W of Adak, AlaskaSun, Aug 16, 10:22 PM HADT · 2234 days ago · 145 km deep · 94 km away
51. 2.153 km SW of Adak, AlaskaMon, Aug 17, 6:33 AM HADT · 2234 days ago · 37 km deep · 62 km away
52. 1.6127 km WSW of Adak, AlaskaMon, Aug 17, 8:38 PM HADT · 2233 days ago · 6 km deep · 98 km away
53. 3.971 km NE of Adak, AlaskaMon, Aug 17, 11:19 PM HADT · 2233 days ago · 154 km deep · 97 km away
54. 3.638 km SE of Adak, AlaskaTue, Aug 18, 4:11 AM HADT · 2233 days ago · 68 km deep · 81 km away
55. 1.6114 km WSW of Adak, AlaskaTue, Aug 18, 8:09 AM HADT · 2233 days ago · 24 km deep · 88 km away
56. 1.835 km ENE of Adak, AlaskaTue, Aug 18, 11:31 PM HADT · 2232 days ago · 128 km deep · 70 km away
57. 2.055 km WNW of Adak, AlaskaThu, Aug 20, 12:06 PM HADT · 2231 days ago · 157 km deep · 13 km away
58. 1.953 km ENE of Adak, AlaskaThu, Aug 20, 10:07 PM HADT · 2230 days ago · 218 km deep · 86 km away
59. 2.063 km WSW of Adak, AlaskaSat, Aug 22, 2:33 AM HADT · 2229 days ago · 68 km deep · 51 km away
60. 2.018 km ESE of Adak, AlaskaSun, Aug 23, 10:20 AM HADT · 2228 days ago · 80 km deep · 61 km away

The first 60 of 160.

Before

1. 1.768 km SW of Adak, AlaskaThu, Jul 30, 5:10 PM HADT · 2251 days ago · 26 km deep · 71 km away
2. 1.782 km W of Adak, AlaskaThu, Jul 30, 4:56 PM HADT · 2251 days ago · 10 km deep · 49 km away
3. 1.8105 km WSW of Adak, AlaskaThu, Jul 30, 4:24 PM HADT · 2251 days ago · 19 km deep · 86 km away
4. 1.573 km SW of Adak, AlaskaWed, Jul 29, 9:26 PM HADT · 2252 days ago · 35 km deep · 68 km away
5. 1.848 km E of Adak, AlaskaWed, Jul 29, 2:30 AM HADT · 2253 days ago · 120 km deep · 88 km away
6. 1.5121 km WSW of Adak, AlaskaWed, Jul 29, 1:40 AM HADT · 2253 days ago · 30 km deep · 94 km away
7. 1.658 km W of Adak, AlaskaWed, Jul 29, 1:30 AM HADT · 2253 days ago · 7 km deep · 25 km away
8. 1.9124 km W of Adak, AlaskaTue, Jul 28, 1:55 PM HADT · 2254 days ago · 186 km deep · 84 km away
9. 1.583 km SW of Adak, AlaskaTue, Jul 28, 10:31 AM HADT · 2254 days ago · 36 km deep · 73 km away
10. 1.853 km W of Adak, AlaskaTue, Jul 28, 7:54 AM HADT · 2254 days ago · 21 km deep · 31 km away
11. 1.577 km SW of Adak, AlaskaMon, Jul 27, 8:58 PM HADT · 2254 days ago · 22 km deep · 71 km away
12. 1.798 km W of Adak, AlaskaMon, Jul 27, 2:29 PM HADT · 2255 days ago · 134 km deep · 65 km away
13. 1.633 km SSW of Adak, AlaskaMon, Jul 27, 5:15 AM HADT · 2255 days ago · 62 km deep · 56 km away
14. 1.981 km WSW of Adak, AlaskaSat, Jul 25, 3:24 AM HADT · 2257 days ago · 65 km deep · 61 km away
15. 1.865 km WSW of Adak, AlaskaFri, Jul 24, 4:50 PM HADT · 2257 days ago · 72 km deep · 48 km away
16. 1.976 km W of Adak, AlaskaFri, Jul 24, 10:33 AM HADT · 2258 days ago · 103 km deep · 44 km away
17. 1.638 km SSW of Adak, AlaskaFri, Jul 24, 5:17 AM HADT · 2258 days ago · 34 km deep · 63 km away
18. 3.848 km S of Adak, AlaskaThu, Jul 23, 11:15 PM HADT · 2258 days ago · 42 km deep · 73 km away
19. 1.679 km W of Adak, AlaskaThu, Jul 23, 3:50 PM HADT · 2258 days ago · 1 km deep · 45 km away
20. 4.3120 km WNW of Adak, AlaskaThu, Jul 23, 1:08 PM HADT · 2259 days ago · 234 km deep · 78 km away

From the USGS Earthquake Hazards Program and its partner networks, event av91105941. Read Tue, Sep 29, 2026, 11:35 AM UTC.