Alaska earthquakes

M2.5 earthquake 188 km S of Adak, Alaska

A magnitude 2.5 earthquake struck 188 km S of Adak, Alaska on Sat, Jun 12, 2021, 11:20 AM HADT (20:20 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.8 89 km S of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
2.5 (ml), micro
Local time
UTC
2021-06-12 20:20:37 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
50.182° N, 176.635° 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 7.9 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
293°, poorly surrounded by stations
Stations used
24

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 1.6183 km S of Adak, Alaska · 1899 days ago · 5 km deep · 10 km away
  2. 3.694 km SSE of Adak, Alaska · 1893 days ago · 25 km deep · 98 km away
  3. 1.9170 km SSW of Adak, Alaska · 1889 days ago · 26 km deep · 47 km away
  4. 3.4219 km SSW of Adak, Alaska · 1887 days ago · 43 km deep · 73 km away
  5. 3.889 km S of Adak, Alaska · 1887 days ago · 16 km deep · 100 km away
  6. 3.892 km S of Adak, Alaska · 1887 days ago · 14 km deep · 97 km away
  7. 1.8164 km S of Adak, Alaska · 1886 days ago · 17 km deep · 29 km away
  8. 1.9100 km SSE of Adak, Alaska · 1885 days ago · 14 km deep · 93 km away
  9. 1.897 km S of Adak, Alaska · 1882 days ago · 26 km deep · 91 km away
  10. 2.5168 km SSW of Adak, Alaska · 1881 days ago · 10 km deep · 96 km away
  11. 1.9180 km S of Adak, Alaska · 1878 days ago · 24 km deep · 28 km away
  12. 2.1226 km SSW of Adak, Alaska · 1877 days ago · 20 km deep · 91 km away

Before

  1. 2.2170 km S of Adak, Alaska · 1943 days ago · 12 km deep · 33 km away
  2. 4.1101 km S of Adak, Alaska · 1950 days ago · 10 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000eciz (also filed as ak0217hwmmfu). Read Fri, Sep 25, 2026, 9:46 PM UTC.