Alaska earthquakes

M3.0 earthquake 235 km ESE of Atka, Alaska

A magnitude 3.0 earthquake struck 235 km ESE of Atka, Alaska on Sat, Aug 15, 2020, 2:51 AM HADT (11:51 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.8 241 km ESE 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
3.0 (ml), minor
Local time
UTC
2020-08-15 11:51:35 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
51.310° N, 171.104° W
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 7.8 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
234°, poorly surrounded by stations
Stations used
22

Nearby

Within 100 km, magnitude 1.5 and up: 26 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 2.9206 km ESE of Atka, Alaska · 2237 days ago · 10 km deep · 52 km away
  2. 3.3193 km ESE of Atka, Alaska · 2236 days ago · 25 km deep · 67 km away
  3. 4.3214 km ESE of Atka, Alaska · 2236 days ago · 10 km deep · 32 km away
  4. 3.3212 km ESE of Atka, Alaska · 2236 days ago · 26 km deep · 43 km away
  5. 3.8201 km E of Atka, Alaska · 2236 days ago · 35 km deep · 65 km away
  6. 3.6201 km SW of Nikolski, Alaska · 2236 days ago · 33 km deep · 58 km away
  7. 3.7212 km ESE of Atka, Alaska · 2236 days ago · 33 km deep · 40 km away
  8. 3.9214 km SW of Nikolski, Alaska · 2236 days ago · 10 km deep · 39 km away
  9. 5.8241 km ESE of Atka, Alaska · 2235 days ago · 18 km deep · 11 km away · felt by 1 · tsunami flag
  10. 2.9250 km ESE of Atka, Alaska · 2235 days ago · 10 km deep · 34 km away
  11. 3.1232 km SW of Nikolski, Alaska · 2235 days ago · 10 km deep · 6 km away
  12. 3.8224 km ESE of Atka, Alaska · 2235 days ago · 10 km deep · 19 km away
  13. 3.4206 km ESE of Atka, Alaska · 2235 days ago · 21 km deep · 29 km away
  14. 3.6196 km SW of Nikolski, Alaska · 2235 days ago · 23 km deep · 62 km away
  15. 3.4200 km SW of Nikolski, Alaska · 2235 days ago · 20 km deep · 51 km away
  16. 2.8207 km SW of Nikolski, Alaska · 2232 days ago · 10 km deep · 31 km away
  17. 2.5147 km ESE of Atka, Alaska · 2231 days ago · 35 km deep · 90 km away
  18. 3.8183 km ESE of Atka, Alaska · 2222 days ago · 37 km deep · 69 km away
  19. 3.0209 km SW of Nikolski, Alaska · 2206 days ago · 36 km deep · 45 km away
  20. 2.9170 km SW of Nikolski, Alaska · 2206 days ago · 10 km deep · 67 km away
  21. 3.1200 km SE of Atka, Alaska · 2204 days ago · 10 km deep · 53 km away
  22. 3.0194 km ESE of Atka, Alaska · 2203 days ago · 36 km deep · 59 km away
  23. 3.2218 km SSW of Nikolski, Alaska · 2197 days ago · 10 km deep · 87 km away
  24. 3.0193 km WSW of Nikolski, Alaska · 2188 days ago · 35 km deep · 88 km away
  25. 2.7186 km E of Atka, Alaska · 2179 days ago · 35 km deep · 80 km away
  26. 3.0191 km E of Atka, Alaska · 2177 days ago · 37 km deep · 72 km away

Before

  1. 1.8140 km ESE of Atka, Alaska · 2237 days ago · 56 km deep · 95 km away
  2. 2.9276 km SSW of Nikolski, Alaska · 2255 days ago · 10 km deep · 99 km away
  3. 3.2210 km ESE of Atka, Alaska · 2262 days ago · 26 km deep · 46 km away
  4. 3.1181 km ESE of Atka, Alaska · 2265 days ago · 35 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000bf7a (also filed as ak020ah9e1s1). Read Wed, Sep 30, 2026, 2:46 AM UTC.