Alaska earthquakes

M3.4 earthquake 183 km SE of Adak, Alaska

A magnitude 3.4 earthquake struck 183 km SE of Adak, Alaska on Sun, Jun 28, 2020, 8:50 AM HADT (17:50 UTC), 36 km (22 mi) below the surface.

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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
3.4 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2020-06-28 17:50:18 UTC
Depth
35.8 km (22.2 mi), shallow
Epicenter
50.537° N, 175.103° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.ScaleComputed byNotes
3.4ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.115 · 10 stations
3.0ML, local (Richter)Alaska Earthquake CenterPreliminary

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 4.5 km horizontally, 19.1 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
266°, poorly surrounded by stations
Stations used
24

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 2.9170 km S of Atka, Alaska · 2285 days ago · 10 km deep · 84 km away
  2. 2.7186 km SE of Adak, Alaska · 2283 days ago · 25 km deep · 9 km away
  3. 1.6100 km SSE of Adak, Alaska · 2282 days ago · 13 km deep · 98 km away
  4. 1.8154 km S of Atka, Alaska · 2280 days ago · 8 km deep · 81 km away
  5. 2.2192 km S of Atka, Alaska · 2277 days ago · 26 km deep · 26 km away
  6. 2.9179 km SSE of Adak, Alaska · 2276 days ago · 10 km deep · 11 km away
  7. 2.696 km SE of Adak, Alaska · 2274 days ago · 23 km deep · 94 km away
  8. 2.5108 km S of Atka, Alaska · 2271 days ago · 7 km deep · 96 km away
  9. 2.1135 km S of Adak, Alaska · 2268 days ago · 26 km deep · 90 km away
  10. 1.9195 km SSE of Adak, Alaska · 2265 days ago · 7 km deep · 27 km away
  11. 2.7167 km S of Adak, Alaska · 2265 days ago · 10 km deep · 95 km away
  12. 2.0160 km S of Adak, Alaska · 2265 days ago · 4 km deep · 94 km away
  13. 3.4120 km SSW of Atka, Alaska · 2250 days ago · 10 km deep · 75 km away
  14. 2.6105 km S of Atka, Alaska · 2244 days ago · 35 km deep · 92 km away
  15. 2.0134 km S of Atka, Alaska · 2244 days ago · 7 km deep · 94 km away
  16. 3.1162 km SSW of Atka, Alaska · 2235 days ago · 25 km deep · 32 km away
  17. 2.1180 km S of Adak, Alaska · 2229 days ago · 26 km deep · 91 km away
  18. 1.5120 km SSW of Atka, Alaska · 2229 days ago · 9 km deep · 82 km away

Before

  1. 1.8117 km SSW of Atka, Alaska · 2296 days ago · 5 km deep · 83 km away
  2. 3.091 km SE of Adak, Alaska · 2300 days ago · 30 km deep · 98 km away
  3. 2.5162 km S of Atka, Alaska · 2301 days ago · 10 km deep · 42 km away
  4. 2.7106 km SE of Adak, Alaska · 2304 days ago · 10 km deep · 76 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000ahfw (also filed as ak02089z5lgt). Read Sat, Oct 3, 2026, 7:08 PM UTC.