Alaska earthquakes

M1.6 earthquake 262 km W of Adak, Alaska

A magnitude 1.6 earthquake struck 262 km W of Adak, Alaska on Wed, Oct 31, 2018, 1:08 PM GMT+12 (01:08 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M4.4 286 km W of Adak, Alaska. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.6 (ML, local (Richter)), micro
Magnitude from
AV
Local time
UTC
2018-10-31 01:08:29 UTC
Depth
21.2 km (13.2 mi), shallow
Epicenter
51.925° N, 179.546° E
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 3.2 km horizontally, 1.3 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
162°
Stations used
5

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 35 in the 30 days before it.

After

  1. 4.3257 km W of Adak, Alaska · 2893 days ago · 174 km deep · 12 km away
  2. 2.5Rat Islands, Aleutian Islands, Alaska · 2893 days ago · 35 km deep · 78 km away
  3. 1.6267 km W of Adak, Alaska · 2892 days ago · 21 km deep · 5 km away
  4. 1.5263 km W of Adak, Alaska · 2892 days ago · 17 km deep · 3 km away
  5. 3.9Rat Islands, Aleutian Islands, Alaska · 2887 days ago · 85 km deep · 87 km away
  6. 3.6272 km WSW of Adak, Alaska · 2886 days ago · 35 km deep · 73 km away
  7. 2.2225 km W of Adak, Alaska · 2878 days ago · 14 km deep · 38 km away
  8. 2.3195 km W of Adak, Alaska · 2876 days ago · 86 km deep · 67 km away
  9. 2.9Rat Islands, Aleutian Islands, Alaska · 2872 days ago · 106 km deep · 86 km away
  10. 4.4286 km W of Adak, Alaska · 2866 days ago · 185 km deep · 42 km away
  11. 2.4252 km W of Adak, Alaska · 2862 days ago · 79 km deep · 41 km away
  12. 4.2197 km WSW of Adak, Alaska · 2862 days ago · 50 km deep · 97 km away
  13. 2.6198 km W of Adak, Alaska · 2849 days ago · 14 km deep · 65 km away
  14. 2.4273 km W of Adak, Alaska · 2848 days ago · 32 km deep · 31 km away

Before

  1. 2.9265 km WSW of Adak, Alaska · 2893 days ago · 47 km deep · 61 km away
  2. 4.8206 km WNW of Adak, Alaska · 2893 days ago · 241 km deep · 87 km away · tsunami flag
  3. 2.5240 km WSW of Adak, Alaska · 2895 days ago · 14 km deep · 97 km away
  4. 2.5267 km W of Adak, Alaska · 2895 days ago · 209 km deep · 6 km away
  5. 1.7299 km WSW of Adak, Alaska · 2897 days ago · 13 km deep · 89 km away
  6. 2.3Rat Islands, Aleutian Islands, Alaska · 2897 days ago · 29 km deep · 73 km away
  7. 1.5269 km W of Adak, Alaska · 2897 days ago · 20 km deep · 6 km away
  8. 1.5271 km W of Adak, Alaska · 2898 days ago · 63 km deep · 36 km away
  9. 2.3Rat Islands, Aleutian Islands, Alaska · 2899 days ago · 32 km deep · 74 km away
  10. 2.1280 km WSW of Adak, Alaska · 2900 days ago · 33 km deep · 58 km away
  11. 2.0211 km W of Adak, Alaska · 2900 days ago · 94 km deep · 59 km away
  12. 1.7287 km WSW of Adak, Alaska · 2900 days ago · 30 km deep · 62 km away
  13. 1.7265 km WSW of Adak, Alaska · 2901 days ago · 17 km deep · 84 km away
  14. 1.9256 km W of Adak, Alaska · 2901 days ago · 101 km deep · 13 km away
  15. 2.1Rat Islands, Aleutian Islands, Alaska · 2902 days ago · 82 km deep · 53 km away
  16. 1.6Rat Islands, Aleutian Islands, Alaska · 2903 days ago · 32 km deep · 77 km away
  17. 2.5220 km W of Adak, Alaska · 2904 days ago · 80 km deep · 57 km away
  18. 2.3278 km WSW of Adak, Alaska · 2904 days ago · 1 km deep · 95 km away
  19. 4.3287 km WSW of Adak, Alaska · 2904 days ago · 38 km deep · 94 km away
  20. 1.7235 km WSW of Adak, Alaska · 2904 days ago · 13 km deep · 75 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event av61808401. Read Fri, Oct 2, 2026, 12:43 AM UTC.