M1.9 earthquake 265 km W of Adak, Alaska

Magnitude

1.9 (ML, local (Richter)), micro

Magnitude from

AV

Local time

Tue, Feb 20, 2018, 5:42 AM GMT+12

UTC

2018-02-19 17:42:08 UTC

Depth

8.2 km (5.1 mi), shallow

Epicenter

51.878° N, 179.509° E

Region

Alaska

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 2.1 km horizontally, 1.6 km in depth

Magnitude uncertainty

±0.23

Depth from

From location

Station coverage gap

299°, poorly surrounded by stations

Stations used

5

After

1. 2.6Rat Islands, Aleutian Islands, AlaskaTue, Feb 20, 10:43 PM GMT+12 · 3146 days ago · 73 km deep · 72 km away
2. 2.0Rat Islands, Aleutian Islands, AlaskaFri, Feb 23, 4:51 PM GMT+12 · 3143 days ago · 13 km deep · 50 km away
3. 4.0Rat Islands, Aleutian Islands, AlaskaFri, Feb 23, 11:05 PM GMT+12 · 3143 days ago · 100 km deep · 71 km away
4. 2.4246 km WSW of Adak, AlaskaSat, Feb 24, 9:49 PM GMT+12 · 3142 days ago · 18 km deep · 63 km away
5. 2.8Rat Islands, Aleutian Islands, AlaskaSun, Feb 25, 4:55 AM GMT+12 · 3142 days ago · 136 km deep · 95 km away
6. 2.8200 km W of Adak, AlaskaTue, Feb 27, 12:30 AM HAST · 3139 days ago · 123 km deep · 66 km away
7. 3.6Rat Islands, Aleutian Islands, AlaskaWed, Feb 28, 9:38 AM GMT+12 · 3138 days ago · 42 km deep · 71 km away
8. 2.4187 km W of Adak, AlaskaTue, Feb 27, 3:24 PM HAST · 3138 days ago · 41 km deep · 78 km away
9. 5.0Rat Islands, Aleutian Islands, AlaskaSat, Mar 3, 9:44 AM GMT+12 · 3135 days ago · 96 km deep · 56 km away · tsunami flag
10. 2.3282 km WSW of Adak, AlaskaSun, Mar 4, 4:24 PM GMT+12 · 3134 days ago · 10 km deep · 93 km away
11. 2.2276 km WSW of Adak, AlaskaSun, Mar 4, 8:59 PM GMT+12 · 3134 days ago · 9 km deep · 90 km away
12. 2.9Rat Islands, Aleutian Islands, AlaskaMon, Mar 5, 11:51 PM GMT+12 · 3133 days ago · 158 km deep · 44 km away
13. 2.1209 km WSW of Adak, AlaskaWed, Mar 7, 10:04 AM HAST · 3130 days ago · 16 km deep · 84 km away
14. 2.9Rat Islands, Aleutian Islands, AlaskaSun, Mar 11, 4:04 PM GMT+12 · 3127 days ago · 129 km deep · 85 km away
15. 2.3199 km W of Adak, AlaskaSun, Mar 11, 5:01 PM HADT · 3126 days ago · 66 km deep · 75 km away
16. 2.3241 km WSW of Adak, AlaskaSun, Mar 11, 4:43 PM GMT-12 · 3126 days ago · 14 km deep · 94 km away
17. 2.2229 km WSW of Adak, AlaskaMon, Mar 12, 4:12 PM HADT · 3125 days ago · 17 km deep · 99 km away
18. 2.3Rat Islands, Aleutian Islands, AlaskaTue, Mar 13, 7:53 PM GMT+12 · 3125 days ago · 67 km deep · 51 km away
19. 2.1290 km W of Adak, AlaskaWed, Mar 14, 4:25 AM GMT+12 · 3125 days ago · 76 km deep · 30 km away
20. 3.7Rat Islands, Aleutian Islands, AlaskaWed, Mar 14, 12:36 PM GMT+12 · 3124 days ago · 40 km deep · 76 km away
21. 1.8Rat Islands, Aleutian Islands, AlaskaWed, Mar 14, 11:06 PM GMT+12 · 3124 days ago · 34 km deep · 69 km away
22. 2.8287 km WSW of Adak, AlaskaThu, Mar 15, 8:24 AM GMT+12 · 3123 days ago · 31 km deep · 93 km away
23. 1.9270 km WSW of Adak, AlaskaThu, Mar 15, 11:49 PM GMT+12 · 3123 days ago · 51 km deep · 52 km away
24. 2.3227 km W of Adak, AlaskaThu, Mar 15, 2:53 PM HADT · 3122 days ago · 86 km deep · 42 km away
25. 3.2Rat Islands, Aleutian Islands, AlaskaSat, Mar 17, 1:57 AM GMT+12 · 3122 days ago · 106 km deep · 50 km away
26. 2.4221 km W of Adak, AlaskaSun, Mar 18, 9:14 PM HADT · 3119 days ago · 66 km deep · 60 km away
27. 4.9Rat Islands, Aleutian Islands, AlaskaTue, Mar 20, 12:20 AM GMT+12 · 3119 days ago · 139 km deep · 90 km away
28. 1.8174 km W of Adak, AlaskaTue, Mar 20, 4:29 AM HADT · 3118 days ago · 10 km deep · 92 km away
29. 2.8Rat Islands, Aleutian Islands, AlaskaWed, Mar 21, 11:20 PM GMT+12 · 3117 days ago · 109 km deep · 66 km away
30. 4.0Rat Islands, Aleutian Islands, AlaskaThu, Mar 22, 3:44 PM GMT+12 · 3116 days ago · 72 km deep · 67 km away
31. 3.9251 km WSW of Adak, AlaskaFri, Mar 23, 7:12 PM GMT+12 · 3115 days ago · 59 km deep · 67 km away
32. 2.9256 km WSW of Adak, AlaskaFri, Mar 23, 9:39 PM GMT+12 · 3115 days ago · 47 km deep · 80 km away
33. 2.6Rat Islands, Aleutian Islands, AlaskaSun, Mar 25, 1:47 AM GMT+12 · 3114 days ago · 111 km deep · 72 km away
34. 2.5Rat Islands, Aleutian Islands, AlaskaWed, Mar 28, 6:51 AM GMT+12 · 3111 days ago · 133 km deep · 80 km away
35. 1.9232 km W of Adak, AlaskaWed, Mar 28, 8:59 AM HADT · 3110 days ago · 69 km deep · 55 km away
36. 1.9Rat Islands, Aleutian Islands, AlaskaThu, Mar 29, 5:17 PM GMT+12 · 3109 days ago · 126 km deep · 72 km away
37. 3.8220 km W of Adak, AlaskaWed, Mar 28, 10:51 PM HADT · 3109 days ago · 177 km deep · 45 km away
38. 2.7230 km W of Adak, AlaskaThu, Mar 29, 4:45 AM HADT · 3109 days ago · 196 km deep · 42 km away
39. 3.6Rat Islands, Aleutian Islands, AlaskaFri, Mar 30, 9:46 PM GMT+12 · 3108 days ago · 73 km deep · 57 km away
40. 2.3245 km WSW of Adak, AlaskaFri, Mar 30, 10:55 PM GMT+12 · 3108 days ago · 48 km deep · 61 km away
41. 2.8187 km W of Adak, AlaskaFri, Mar 30, 9:19 PM HADT · 3107 days ago · 217 km deep · 79 km away
42. 2.2208 km WSW of Adak, AlaskaSat, Mar 31, 7:18 AM HADT · 3107 days ago · 55 km deep · 79 km away
43. 3.2245 km W of Adak, AlaskaSun, Apr 1, 9:03 PM GMT+12 · 3106 days ago · 19 km deep · 41 km away
44. 2.3277 km WSW of Adak, AlaskaMon, Apr 2, 7:48 PM GMT+12 · 3105 days ago · 49 km deep · 61 km away
45. 2.1Rat Islands, Aleutian Islands, AlaskaWed, Apr 4, 12:13 PM GMT+12 · 3103 days ago · 7 km deep · 72 km away
46. 3.4Rat Islands, Aleutian Islands, AlaskaThu, Apr 5, 4:32 PM GMT+12 · 3102 days ago · 46 km deep · 88 km away
47. 2.2210 km WSW of Adak, AlaskaWed, Apr 4, 10:53 PM HADT · 3102 days ago · 9 km deep · 91 km away
48. 2.2213 km W of Adak, AlaskaThu, Apr 5, 3:52 AM HADT · 3102 days ago · 86 km deep · 56 km away
49. 2.2258 km W of Adak, AlaskaFri, Apr 6, 7:12 AM GMT+12 · 3101 days ago · 74 km deep · 26 km away
50. 2.4Rat Islands, Aleutian Islands, AlaskaFri, Apr 6, 4:53 PM GMT+12 · 3101 days ago · 65 km deep · 56 km away
51. 2.5Rat Islands, Aleutian Islands, AlaskaSat, Apr 7, 2:24 AM GMT+12 · 3101 days ago · 92 km deep · 75 km away
52. 2.5262 km W of Adak, AlaskaSun, Apr 8, 5:03 AM GMT+12 · 3100 days ago · 85 km deep · 20 km away
53. 2.6Rat Islands, Aleutian Islands, AlaskaSun, Apr 8, 5:20 PM GMT+12 · 3099 days ago · 100 km deep · 61 km away
54. 2.0Rat Islands, Aleutian Islands, AlaskaSun, Apr 8, 6:35 PM GMT+12 · 3099 days ago · 6 km deep · 98 km away
55. 3.0209 km WSW of Adak, AlaskaSun, Apr 15, 3:26 PM HADT · 3091 days ago · 15 km deep · 98 km away
56. 2.3Rat Islands, Aleutian Islands, AlaskaThu, Apr 19, 1:41 PM GMT+12 · 3088 days ago · 38 km deep · 68 km away
57. 1.9Rat Islands, Aleutian Islands, AlaskaFri, Apr 20, 3:40 PM GMT+12 · 3087 days ago · 83 km deep · 66 km away

Before

1. 2.2Rat Islands, Aleutian Islands, AlaskaSun, Feb 18, 3:42 PM GMT+12 · 3148 days ago · 90 km deep · 59 km away
2. 2.5243 km WSW of Adak, AlaskaSun, Feb 18, 6:24 AM GMT+12 · 3149 days ago · 63 km deep · 56 km away
3. 2.3Rat Islands, Aleutian Islands, AlaskaThu, Feb 15, 11:39 AM GMT+12 · 3151 days ago · 93 km deep · 71 km away
4. 3.0Rat Islands, Aleutian Islands, AlaskaWed, Feb 14, 4:51 AM GMT+12 · 3153 days ago · 101 km deep · 68 km away
5. 3.9Rat Islands, Aleutian Islands, AlaskaTue, Feb 13, 9:01 PM GMT+12 · 3153 days ago · 112 km deep · 82 km away
6. 2.8Rat Islands, Aleutian Islands, AlaskaSun, Feb 11, 8:02 PM GMT+12 · 3155 days ago · 44 km deep · 79 km away
7. 2.6Rat Islands, Aleutian Islands, AlaskaSat, Feb 10, 8:48 PM GMT+12 · 3156 days ago · 143 km deep · 76 km away
8. 3.0175 km W of Adak, AlaskaFri, Feb 9, 6:56 PM HAST · 3156 days ago · 236 km deep · 92 km away
9. 4.2236 km W of Adak, AlaskaFri, Feb 9, 5:09 PM HAST · 3156 days ago · 76 km deep · 38 km away
10. 2.1234 km W of Adak, AlaskaThu, Feb 8, 11:56 AM HAST · 3157 days ago · 91 km deep · 36 km away
11. 2.8Andreanof Islands, Aleutian Islands, AlaskaThu, Feb 8, 5:13 AM HAST · 3158 days ago · 118 km deep · 61 km away
12. 3.4Rat Islands, Aleutian Islands, AlaskaThu, Feb 8, 11:54 PM GMT+12 · 3158 days ago · 60 km deep · 60 km away
13. 2.0286 km W of Adak, AlaskaThu, Feb 8, 7:03 PM GMT+12 · 3158 days ago · 76 km deep · 29 km away
14. 2.5256 km W of Adak, AlaskaThu, Feb 8, 4:39 AM GMT+12 · 3159 days ago · 86 km deep · 29 km away
15. 3.6Rat Islands, Aleutian Islands, AlaskaWed, Feb 7, 8:45 PM GMT+12 · 3159 days ago · 46 km deep · 98 km away
16. 2.6233 km WSW of Adak, AlaskaTue, Feb 6, 6:40 PM HAST · 3159 days ago · 22 km deep · 76 km away
17. 4.2Rat Islands, Aleutian Islands, AlaskaSun, Feb 4, 8:23 PM GMT+12 · 3162 days ago · 43 km deep · 83 km away
18. 1.6260 km W of Adak, AlaskaFri, Feb 2, 5:02 PM GMT+12 · 3164 days ago · 12 km deep · 6 km away
19. 2.4Rat Islands, Aleutian Islands, AlaskaFri, Feb 2, 12:10 PM GMT+12 · 3164 days ago · 9 km deep · 93 km away
20. 4.1252 km W of Adak, AlaskaThu, Feb 1, 2:45 AM GMT+12 · 3166 days ago · 255 km deep · 54 km away

From the USGS Earthquake Hazards Program and its partner networks, event av70777779. Read Fri, Oct 2, 2026, 6:29 AM UTC.