Alaska earthquakes

M2.6 earthquake 83 km NE of Atka, Alaska

A magnitude 2.6 earthquake struck 83 km NE of Atka, Alaska on Thu, Aug 20, 2020, 7:07 AM HADT (16:07 UTC), 236 km (147 mi) below the surface.

A larger quake followed: M4.0 26 km NNW of Atka, 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
2.6 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2020-08-20 16:07:37 UTC
Depth
235.9 km (146.6 mi), intermediate-depth
Epicenter
52.806° N, 173.473° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.ScaleComputed byNotes
2.6ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.105 · 12 stations
2.1ML, local (Richter)Alaska Earthquake CenterPreliminary

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 31.5 km horizontally, 25.4 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
178°
Stations used
31

Nearby

Within 100 km, magnitude 1.5 and up: 29 in the 60 days after this one and 26 in the 30 days before it.

After

  1. 3.48 km ESE of Atka, Alaska · 2234 days ago · 184 km deep · 82 km away
  2. 2.99 km WSW of Atka, Alaska · 2233 days ago · 222 km deep · 91 km away
  3. 2.8Andreanof Islands, Aleutian Islands, Alaska · 2232 days ago · 205 km deep · 79 km away
  4. 2.214 km ENE of Atka, Alaska · 2231 days ago · 101 km deep · 73 km away
  5. 1.817 km W of Atka, Alaska · 2228 days ago · 99 km deep · 95 km away
  6. 3.28 km WNW of Atka, Alaska · 2223 days ago · 195 km deep · 88 km away
  7. 2.64 km SSW of Atka, Alaska · 2210 days ago · 162 km deep · 88 km away
  8. 1.955 km ESE of Atka, Alaska · 2209 days ago · 69 km deep · 84 km away
  9. 2.940 km ESE of Atka, Alaska · 2209 days ago · 10 km deep · 81 km away
  10. 2.637 km NW of Atka, Alaska · 2208 days ago · 220 km deep · 93 km away
  11. 1.942 km ENE of Atka, Alaska · 2208 days ago · 10 km deep · 51 km away
  12. 2.335 km ENE of Atka, Alaska · 2204 days ago · 188 km deep · 61 km away
  13. 1.933 km NW of Atka, Alaska · 2204 days ago · 162 km deep · 89 km away
  14. 4.026 km NNW of Atka, Alaska · 2201 days ago · 122 km deep · 76 km away
  15. 2.07 km NW of Atka, Alaska · 2199 days ago · 140 km deep · 82 km away
  16. 2.967 km ESE of Atka, Alaska · 2199 days ago · 71 km deep · 94 km away
  17. 1.915 km WSW of Atka, Alaska · 2198 days ago · 170 km deep · 96 km away
  18. 1.95 km NW of Atka, Alaska · 2197 days ago · 152 km deep · 82 km away
  19. 2.147 km ESE of Atka, Alaska · 2194 days ago · 85 km deep · 78 km away
  20. 3.6100 km E of Atka, Alaska · 2192 days ago · 151 km deep · 70 km away
  21. 2.325 km NE of Atka, Alaska · 2189 days ago · 172 km deep · 60 km away
  22. 1.962 km ESE of Atka, Alaska · 2188 days ago · 53 km deep · 99 km away
  23. 3.539 km ESE of Atka, Alaska · 2186 days ago · 14 km deep · 80 km away
  24. 2.218 km SE of Atka, Alaska · 2184 days ago · 71 km deep · 87 km away
  25. 2.154 km ESE of Atka, Alaska · 2183 days ago · 53 km deep · 94 km away
  26. 1.932 km E of Atka, Alaska · 2182 days ago · 14 km deep · 66 km away
  27. 3.945 km SE of Atka, Alaska · 2181 days ago · 20 km deep · 99 km away
  28. 2.926 km WNW of Atka, Alaska · 2181 days ago · 195 km deep · 89 km away
  29. 3.9136 km NE of Atka, Alaska · 2174 days ago · 215 km deep · 59 km away

Before

  1. 2.336 km NNW of Atka, Alaska · 2236 days ago · 193 km deep · 71 km away
  2. 2.868 km ENE of Atka, Alaska · 2238 days ago · 194 km deep · 38 km away
  3. 3.128 km NW of Atka, Alaska · 2241 days ago · 230 km deep · 89 km away
  4. 1.721 km ENE of Atka, Alaska · 2241 days ago · 143 km deep · 66 km away
  5. 1.921 km E of Atka, Alaska · 2241 days ago · 143 km deep · 77 km away
  6. 2.339 km E of Atka, Alaska · 2242 days ago · 119 km deep · 61 km away
  7. 3.0134 km ENE of Atka, Alaska · 2242 days ago · 138 km deep · 90 km away
  8. 1.954 km ESE of Atka, Alaska · 2243 days ago · 73 km deep · 89 km away
  9. 2.352 km NE of Atka, Alaska · 2243 days ago · 157 km deep · 36 km away
  10. 2.95 km NNE of Atka, Alaska · 2244 days ago · 171 km deep · 79 km away
  11. 2.013 km E of Atka, Alaska · 2246 days ago · 181 km deep · 76 km away
  12. 2.120 km WNW of Atka, Alaska · 2246 days ago · 177 km deep · 92 km away
  13. 2.914 km W of Atka, Alaska · 2247 days ago · 188 km deep · 92 km away
  14. 2.817 km NE of Atka, Alaska · 2247 days ago · 206 km deep · 67 km away
  15. 3.930 km ESE of Atka, Alaska · 2248 days ago · 83 km deep · 82 km away
  16. 3.365 km E of Atka, Alaska · 2252 days ago · 156 km deep · 66 km away
  17. 1.757 km ESE of Atka, Alaska · 2252 days ago · 69 km deep · 94 km away
  18. 3.564 km ESE of Atka, Alaska · 2252 days ago · 51 km deep · 84 km away
  19. 1.958 km NW of Atka, Alaska · 2257 days ago · 176 km deep · 94 km away
  20. 1.662 km E of Atka, Alaska · 2258 days ago · 5 km deep · 69 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000bkss (also filed as ak020aplsegb). Read Fri, Oct 2, 2026, 2:33 PM UTC.