Alaska earthquakes

M3.0 earthquake 209 km SW of Nikolski, Alaska

A magnitude 3.0 earthquake struck 209 km SW of Nikolski, Alaska on Mon, Sep 14, 2020, 6:13 PM HADT (03:13 UTC), 36 km (22 mi) below the surface.

A larger quake followed: M3.7 128 km SW of Nikolski, 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
2020-09-15 03:13:49 UTC
Depth
35.6 km (22.1 mi), shallow
Epicenter
51.709° N, 171.180° 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 8.2 km horizontally, 24.1 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
223°, poorly surrounded by stations
Stations used
28

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 16 in the 30 days before it.

After

  1. 2.9170 km SW of Nikolski, Alaska · 2206 days ago · 10 km deep · 50 km away
  2. 3.1200 km SE of Atka, Alaska · 2204 days ago · 10 km deep · 76 km away
  3. 3.0194 km ESE of Atka, Alaska · 2203 days ago · 36 km deep · 21 km away
  4. 3.1131 km WSW of Nikolski, Alaska · 2196 days ago · 35 km deep · 84 km away
  5. 3.5130 km WSW of Nikolski, Alaska · 2194 days ago · 49 km deep · 89 km away
  6. 3.0193 km WSW of Nikolski, Alaska · 2189 days ago · 35 km deep · 43 km away
  7. 2.7186 km E of Atka, Alaska · 2180 days ago · 35 km deep · 38 km away
  8. 3.0191 km E of Atka, Alaska · 2177 days ago · 37 km deep · 30 km away
  9. 3.4183 km WSW of Nikolski, Alaska · 2174 days ago · 35 km deep · 38 km away
  10. 3.7128 km SW of Nikolski, Alaska · 2172 days ago · 21 km deep · 81 km away
  11. 2.5192 km ESE of Atka, Alaska · 2165 days ago · 37 km deep · 24 km away
  12. 2.9179 km WSW of Nikolski, Alaska · 2162 days ago · 35 km deep · 46 km away
  13. 3.6126 km WSW of Nikolski, Alaska · 2148 days ago · 47 km deep · 88 km away

Before

  1. 2.6134 km SW of Nikolski, Alaska · 2218 days ago · 33 km deep · 75 km away
  2. 3.8183 km ESE of Atka, Alaska · 2222 days ago · 37 km deep · 32 km away
  3. 3.0129 km SSW of Nikolski, Alaska · 2228 days ago · 10 km deep · 95 km away
  4. 2.5147 km ESE of Atka, Alaska · 2232 days ago · 35 km deep · 67 km away
  5. 1.6116 km ESE of Atka, Alaska · 2232 days ago · 49 km deep · 99 km away
  6. 2.8207 km SW of Nikolski, Alaska · 2232 days ago · 10 km deep · 37 km away
  7. 2.9135 km ESE of Atka, Alaska · 2235 days ago · 140 km deep · 88 km away
  8. 3.4200 km SW of Nikolski, Alaska · 2235 days ago · 20 km deep · 9 km away
  9. 3.6196 km SW of Nikolski, Alaska · 2235 days ago · 23 km deep · 17 km away
  10. 3.1132 km E of Atka, Alaska · 2235 days ago · 99 km deep · 89 km away
  11. 3.4206 km ESE of Atka, Alaska · 2236 days ago · 21 km deep · 36 km away
  12. 3.8224 km ESE of Atka, Alaska · 2236 days ago · 10 km deep · 26 km away
  13. 3.1232 km SW of Nikolski, Alaska · 2236 days ago · 10 km deep · 39 km away
  14. 2.9250 km ESE of Atka, Alaska · 2236 days ago · 10 km deep · 78 km away
  15. 5.8241 km ESE of Atka, Alaska · 2236 days ago · 18 km deep · 55 km away · felt by 1 · tsunami flag
  16. 3.9214 km SW of Nikolski, Alaska · 2237 days ago · 10 km deep · 6 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000c1f8 (also filed as ak020bwe22rm). Read Wed, Sep 30, 2026, 4:49 PM UTC.