Alaska earthquakes

M3.1 earthquake 174 km E of Atka, Alaska

A magnitude 3.1 earthquake struck 174 km E of Atka, Alaska on Sat, Apr 18, 2020, 5:01 PM HADT (02:01 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M3.9 195 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
3.1 (ml), minor
Local time
UTC
2020-04-19 02:01:11 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
52.217° N, 171.651° 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 3.2 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
205°, poorly surrounded by stations
Stations used
22

Nearby

Within 100 km, magnitude 1.5 and up: 21 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 3.9195 km SW of Nikolski, Alaska · 2352 days ago · 19 km deep · 88 km away
  2. 3.6175 km SW of Nikolski, Alaska · 2350 days ago · 27 km deep · 75 km away
  3. 3.6185 km SW of Nikolski, Alaska · 2350 days ago · 26 km deep · 79 km away
  4. 2.7104 km ESE of Atka, Alaska · 2344 days ago · 35 km deep · 99 km away
  5. 3.0186 km SW of Nikolski, Alaska · 2342 days ago · 37 km deep · 48 km away
  6. 3.777 km E of Atka, Alaska · 2341 days ago · 150 km deep · 96 km away
  7. 3.7173 km WSW of Nikolski, Alaska · 2337 days ago · 57 km deep · 37 km away
  8. 3.4179 km ESE of Atka, Alaska · 2337 days ago · 39 km deep · 48 km away
  9. 3.4159 km WSW of Nikolski, Alaska · 2334 days ago · 35 km deep · 46 km away
  10. 2.879 km ENE of Atka, Alaska · 2329 days ago · 272 km deep · 100 km away
  11. 2.678 km E of Atka, Alaska · 2325 days ago · 35 km deep · 96 km away
  12. 3.8136 km WSW of Nikolski, Alaska · 2320 days ago · 54 km deep · 74 km away
  13. 3.3171 km E of Atka, Alaska · 2319 days ago · 16 km deep · 12 km away
  14. 3.5156 km ESE of Atka, Alaska · 2318 days ago · 35 km deep · 44 km away
  15. 3.8149 km SW of Nikolski, Alaska · 2316 days ago · 35 km deep · 92 km away
  16. 3.7198 km SW of Nikolski, Alaska · 2311 days ago · 35 km deep · 50 km away
  17. 3.2218 km SW of Nikolski, Alaska · 2309 days ago · 10 km deep · 79 km away
  18. 2.2170 km WSW of Nikolski, Alaska · 2308 days ago · 24 km deep · 36 km away
  19. 1.9135 km ESE of Atka, Alaska · 2308 days ago · 36 km deep · 76 km away
  20. 3.386 km ENE of Atka, Alaska · 2304 days ago · 104 km deep · 90 km away
  21. 2.8139 km E of Atka, Alaska · 2300 days ago · 112 km deep · 41 km away

Before

  1. 3.6195 km E of Atka, Alaska · 2361 days ago · 35 km deep · 30 km away
  2. 3.181 km E of Atka, Alaska · 2361 days ago · 106 km deep · 94 km away
  3. 3.1197 km SW of Nikolski, Alaska · 2362 days ago · 35 km deep · 64 km away
  4. 3.9121 km WSW of Nikolski, Alaska · 2364 days ago · 108 km deep · 89 km away
  5. 4.1180 km WSW of Nikolski, Alaska · 2365 days ago · 46 km deep · 31 km away
  6. 3.6134 km SW of Nikolski, Alaska · 2371 days ago · 35 km deep · 80 km away
  7. 3.4129 km WSW of Nikolski, Alaska · 2371 days ago · 10 km deep · 76 km away
  8. 3.6176 km WSW of Nikolski, Alaska · 2372 days ago · 22 km deep · 44 km away
  9. 2.8130 km ESE of Atka, Alaska · 2374 days ago · 35 km deep · 65 km away
  10. 3.1192 km SW of Nikolski, Alaska · 2376 days ago · 22 km deep · 90 km away
  11. 3.2142 km W of Nikolski, Alaska · 2384 days ago · 190 km deep · 90 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009dvy (also filed as ak02051yba5f). Read Tue, Sep 29, 2026, 11:25 PM UTC.