Alaska earthquakes

M2.1 earthquake 226 km SSW of Adak, Alaska

A magnitude 2.1 earthquake struck 226 km SSW of Adak, Alaska on Thu, Aug 5, 2021, 3:57 AM HADT (12:57 UTC), 20 km (12 mi) below the surface.

A larger quake followed: M3.9 177 km SSW of Adak, Alaska. This one was a foreshock.

More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
2.1 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2021-08-05 12:57:06 UTC
Depth
20.0 km (12.4 mi), shallow
Epicenter
49.997° N, 177.876° 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.

Stations used
27

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 3.2198 km S of Adak, Alaska · 1875 days ago · 10 km deep · 74 km away
  2. 1.5137 km SSW of Adak, Alaska · 1870 days ago · 26 km deep · 94 km away
  3. 1.9241 km S of Adak, Alaska · 1870 days ago · 12 km deep · 62 km away
  4. 1.7209 km S of Adak, Alaska · 1870 days ago · 21 km deep · 59 km away
  5. 3.4200 km SSW of Adak, Alaska · 1870 days ago · 10 km deep · 45 km away
  6. 2.1186 km SSW of Adak, Alaska · 1868 days ago · 26 km deep · 40 km away
  7. 2.0183 km S of Adak, Alaska · 1859 days ago · 25 km deep · 64 km away
  8. 2.8239 km SSW of Adak, Alaska · 1856 days ago · 10 km deep · 41 km away
  9. 3.4204 km SSW of Adak, Alaska · 1843 days ago · 10 km deep · 29 km away
  10. 3.9177 km SSW of Adak, Alaska · 1831 days ago · 10 km deep · 59 km away
  11. 2.3179 km SSW of Adak, Alaska · 1830 days ago · 25 km deep · 56 km away

Before

  1. 2.5168 km SSW of Adak, Alaska · 1888 days ago · 10 km deep · 63 km away
  2. 1.9211 km SSW of Adak, Alaska · 1890 days ago · 26 km deep · 37 km away
  3. 1.9176 km SSW of Adak, Alaska · 1891 days ago · 26 km deep · 61 km away
  4. 1.8164 km S of Adak, Alaska · 1894 days ago · 17 km deep · 86 km away
  5. 3.4219 km SSW of Adak, Alaska · 1894 days ago · 43 km deep · 19 km away
  6. 2.1242 km SW of Adak, Alaska · 1896 days ago · 11 km deep · 53 km away
  7. 1.9170 km SSW of Adak, Alaska · 1897 days ago · 26 km deep · 64 km away
  8. 1.6183 km S of Adak, Alaska · 1906 days ago · 5 km deep · 84 km away
  9. 1.9254 km SW of Adak, Alaska · 1907 days ago · 27 km deep · 79 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0219z33qr6. Read Fri, Oct 2, 2026, 10:58 PM UTC.