Alaska earthquakes

M3.6 earthquake 201 km SW of Nikolski, Alaska

A magnitude 3.6 earthquake struck 201 km SW of Nikolski, Alaska on Sat, Aug 15, 2020, 12:03 PM HADT (21:03 UTC), 33 km (20 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
3.6 (mb), minor
Local time
UTC
2020-08-15 21:03:45 UTC
Depth
32.8 km (20.4 mi), shallow
Epicenter
51.825° N, 171.199° 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 9.5 km horizontally, 7.7 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
186°, poorly surrounded by stations
Stations used
35

Nearby

Within 100 km, magnitude 1.5 and up: 27 in the 60 days after this one and 15 in the 30 days before it.

After

  1. 3.7212 km ESE of Atka, Alaska · 2236 days ago · 33 km deep · 18 km away
  2. 3.9214 km SW of Nikolski, Alaska · 2236 days ago · 10 km deep · 19 km away
  3. 5.8241 km ESE of Atka, Alaska · 2235 days ago · 18 km deep · 68 km away · felt by 1 · tsunami flag
  4. 2.9250 km ESE of Atka, Alaska · 2235 days ago · 10 km deep · 91 km away
  5. 3.1232 km SW of Nikolski, Alaska · 2235 days ago · 10 km deep · 52 km away
  6. 3.8224 km ESE of Atka, Alaska · 2235 days ago · 10 km deep · 39 km away
  7. 3.4206 km ESE of Atka, Alaska · 2235 days ago · 21 km deep · 47 km away
  8. 3.1132 km E of Atka, Alaska · 2235 days ago · 99 km deep · 81 km away
  9. 3.6196 km SW of Nikolski, Alaska · 2235 days ago · 23 km deep · 5 km away
  10. 3.4200 km SW of Nikolski, Alaska · 2235 days ago · 20 km deep · 9 km away
  11. 2.9135 km ESE of Atka, Alaska · 2234 days ago · 140 km deep · 89 km away
  12. 2.8207 km SW of Nikolski, Alaska · 2232 days ago · 10 km deep · 47 km away
  13. 3.3108 km SW of Nikolski, Alaska · 2231 days ago · 35 km deep · 94 km away
  14. 1.6116 km ESE of Atka, Alaska · 2231 days ago · 49 km deep · 95 km away
  15. 2.5147 km ESE of Atka, Alaska · 2231 days ago · 35 km deep · 65 km away
  16. 3.0129 km SSW of Nikolski, Alaska · 2227 days ago · 10 km deep · 93 km away
  17. 3.8183 km ESE of Atka, Alaska · 2222 days ago · 37 km deep · 27 km away
  18. 2.6134 km SW of Nikolski, Alaska · 2218 days ago · 33 km deep · 67 km away
  19. 3.0209 km SW of Nikolski, Alaska · 2206 days ago · 36 km deep · 13 km away
  20. 2.9170 km SW of Nikolski, Alaska · 2206 days ago · 10 km deep · 52 km away
  21. 3.1200 km SE of Atka, Alaska · 2204 days ago · 10 km deep · 86 km away
  22. 3.0194 km ESE of Atka, Alaska · 2203 days ago · 36 km deep · 17 km away
  23. 3.1131 km WSW of Nikolski, Alaska · 2196 days ago · 35 km deep · 74 km away
  24. 3.5130 km WSW of Nikolski, Alaska · 2194 days ago · 49 km deep · 78 km away
  25. 3.0193 km WSW of Nikolski, Alaska · 2188 days ago · 35 km deep · 30 km away
  26. 2.7186 km E of Atka, Alaska · 2179 days ago · 35 km deep · 28 km away
  27. 3.0191 km E of Atka, Alaska · 2177 days ago · 37 km deep · 20 km away

Before

  1. 3.8201 km E of Atka, Alaska · 2237 days ago · 35 km deep · 10 km away
  2. 3.3212 km ESE of Atka, Alaska · 2237 days ago · 26 km deep · 16 km away
  3. 4.3214 km ESE of Atka, Alaska · 2237 days ago · 10 km deep · 28 km away
  4. 3.3193 km ESE of Atka, Alaska · 2237 days ago · 25 km deep · 16 km away
  5. 2.9206 km ESE of Atka, Alaska · 2237 days ago · 10 km deep · 9 km away
  6. 3.0235 km ESE of Atka, Alaska · 2237 days ago · 10 km deep · 58 km away
  7. 1.8140 km ESE of Atka, Alaska · 2237 days ago · 56 km deep · 77 km away
  8. 4.0107 km SW of Nikolski, Alaska · 2248 days ago · 35 km deep · 94 km away
  9. 3.1133 km WSW of Nikolski, Alaska · 2254 days ago · 22 km deep · 70 km away
  10. 3.2181 km E of Atka, Alaska · 2258 days ago · 118 km deep · 77 km away
  11. 3.2210 km ESE of Atka, Alaska · 2262 days ago · 26 km deep · 13 km away
  12. 2.6140 km E of Atka, Alaska · 2264 days ago · 35 km deep · 70 km away
  13. 1.9119 km ESE of Atka, Alaska · 2265 days ago · 46 km deep · 95 km away
  14. 2.3147 km WSW of Nikolski, Alaska · 2265 days ago · 71 km deep · 62 km away
  15. 3.1181 km ESE of Atka, Alaska · 2265 days ago · 35 km deep · 32 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000bfbq. Read Wed, Sep 30, 2026, 5:57 AM UTC.