Alaska earthquakes

M2.5 earthquake 191 km S of Adak, Alaska

A magnitude 2.5 earthquake struck 191 km S of Adak, Alaska on Thu, Jun 4, 2020, 11:40 PM HADT (08:40 UTC), 31 km (19 mi) below the surface.

A larger quake followed: M3.8 189 km S of Adak, 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
2.5 (ml), micro
Local time
UTC
2020-06-05 08:40:51 UTC
Depth
30.7 km (19.1 mi), shallow
Epicenter
50.173° N, 177.063° 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 6.3 km horizontally, 18.3 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
286°, poorly surrounded by stations
Stations used
22

Nearby

Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 30 in the 30 days before it.

After

  1. 3.8189 km S of Adak, Alaska · 2290 days ago · 10 km deep · 7 km away
  2. 1.9160 km S of Adak, Alaska · 2275 days ago · 26 km deep · 37 km away
  3. 3.0190 km S of Adak, Alaska · 2264 days ago · 10 km deep · 8 km away
  4. 2.1135 km S of Adak, Alaska · 2264 days ago · 26 km deep · 74 km away
  5. 2.0193 km S of Adak, Alaska · 2264 days ago · 12 km deep · 6 km away
  6. 1.5179 km S of Adak, Alaska · 2263 days ago · 8 km deep · 37 km away
  7. 1.6198 km S of Adak, Alaska · 2263 days ago · 17 km deep · 27 km away
  8. 2.7167 km S of Adak, Alaska · 2261 days ago · 10 km deep · 50 km away
  9. 2.0160 km S of Adak, Alaska · 2261 days ago · 4 km deep · 54 km away

Before

  1. 1.9164 km S of Adak, Alaska · 2309 days ago · 26 km deep · 44 km away
  2. 1.9105 km S of Adak, Alaska · 2328 days ago · 25 km deep · 97 km away
  3. 4.5146 km SSE of Adak, Alaska · 2329 days ago · 21 km deep · 99 km away
  4. 3.0109 km S of Adak, Alaska · 2330 days ago · 10 km deep · 97 km away
  5. 2.099 km S of Adak, Alaska · 2331 days ago · 26 km deep · 92 km away
  6. 2.5115 km S of Adak, Alaska · 2332 days ago · 10 km deep · 92 km away
  7. 2.6232 km SSW of Adak, Alaska · 2332 days ago · 10 km deep · 69 km away
  8. 2.8113 km S of Adak, Alaska · 2332 days ago · 10 km deep · 93 km away
  9. 3.9105 km S of Adak, Alaska · 2332 days ago · 10 km deep · 96 km away
  10. 3.8100 km S of Adak, Alaska · 2332 days ago · 10 km deep · 98 km away
  11. 2.5112 km S of Adak, Alaska · 2332 days ago · 10 km deep · 94 km away
  12. 1.7107 km SSE of Adak, Alaska · 2332 days ago · 34 km deep · 99 km away
  13. 1.9102 km S of Adak, Alaska · 2332 days ago · 11 km deep · 100 km away
  14. 1.8105 km S of Adak, Alaska · 2332 days ago · 25 km deep · 99 km away
  15. 2.8113 km S of Adak, Alaska · 2332 days ago · 29 km deep · 94 km away
  16. 1.8103 km S of Adak, Alaska · 2332 days ago · 10 km deep · 98 km away
  17. 3.0110 km SSE of Adak, Alaska · 2332 days ago · 10 km deep · 96 km away
  18. 3.9106 km S of Adak, Alaska · 2332 days ago · 10 km deep · 97 km away
  19. 2.5116 km S of Adak, Alaska · 2332 days ago · 29 km deep · 90 km away
  20. 3.6105 km S of Adak, Alaska · 2332 days ago · 23 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000aafu (also filed as ak02077sdngi). Read Tue, Sep 29, 2026, 6:33 PM UTC.