Alaska earthquakes

M2.7 earthquake 30 km E of Old Harbor, Alaska

A magnitude 2.7 earthquake struck 30 km E of Old Harbor, Alaska on Thu, Jul 29, 2021, 7:23 PM AKDT (03:23 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.8 31 km NNW of Akhiok, Alaska. This one was a foreshock.

Womens Bay forecastMore in Alaska

Map

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

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The earthquake

Magnitude
2.7 (ml), micro
Local time
UTC
2021-07-30 03:23:30 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
57.209° N, 152.807° 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 9.9 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.07
Depth from
Operator assigned
Station coverage gap
218°, poorly surrounded by stations
Stations used
16

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 2.831 km NNW of Akhiok, Alaska · 1882 days ago · 35 km deep · 90 km away
  2. 2.130 km ESE of Old Harbor, Alaska · 1881 days ago · 9 km deep · 12 km away
  3. 1.713 km NE of Larsen Bay, Alaska · 1876 days ago · 13 km deep · 76 km away
  4. 1.89 km NE of Chiniak, Alaska · 1876 days ago · 18 km deep · 63 km away
  5. 2.010 km ESE of Karluk, Alaska · 1876 days ago · 57 km deep · 96 km away
  6. 1.821 km WSW of Womens Bay, Alaska · 1872 days ago · 47 km deep · 48 km away
  7. 1.610 km NNE of Port Lions, Alaska · 1870 days ago · 46 km deep · 82 km away
  8. 1.630 km N of Akhiok, Alaska · 1870 days ago · 8 km deep · 78 km away
  9. 1.8Kodiak Island region, Alaska · 1868 days ago · 38 km deep · 52 km away
  10. 1.9Kodiak Island region, Alaska · 1866 days ago · 2 km deep · 29 km away
  11. 1.925 km SE of Larsen Bay, Alaska · 1858 days ago · 7 km deep · 58 km away
  12. 2.815 km NE of Kodiak, Alaska · 1856 days ago · 42 km deep · 82 km away · felt by 1
  13. 2.421 km SW of Larsen Bay, Alaska · 1855 days ago · 40 km deep · 88 km away
  14. 1.831 km E of Akhiok, Alaska · 1848 days ago · 31 km deep · 60 km away
  15. 2.114 km ENE of Chiniak, Alaska · 1848 days ago · 9 km deep · 67 km away
  16. 1.659 km SE of Akhiok, Alaska · 1847 days ago · 2 km deep · 90 km away
  17. 2.035 km SSE of Akhiok, Alaska · 1838 days ago · 26 km deep · 91 km away
  18. 1.59 km NNE of Larsen Bay, Alaska · 1836 days ago · 30 km deep · 82 km away

Before

  1. 1.918 km NNW of Old Harbor, Alaska · 1887 days ago · 20 km deep · 42 km away
  2. 1.617 km NNE of Old Harbor, Alaska · 1888 days ago · 43 km deep · 26 km away
  3. 3.021 km SSE of Karluk, Alaska · 1894 days ago · 38 km deep · 92 km away
  4. 2.142 km W of Port Lions, Alaska · 1897 days ago · 48 km deep · 91 km away
  5. 1.626 km NNE of Larsen Bay, Alaska · 1900 days ago · 45 km deep · 90 km away
  6. 1.620 km SW of Old Harbor, Alaska · 1902 days ago · 25 km deep · 47 km away
  7. 2.03 km SSE of Akhiok, Alaska · 1905 days ago · 41 km deep · 88 km away
  8. 2.833 km NNE of Akhiok, Alaska · 1908 days ago · 53 km deep · 75 km away
  9. 1.628 km SSW of Larsen Bay, Alaska · 1911 days ago · 29 km deep · 78 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f0hc. Read Thu, Sep 24, 2026, 8:05 AM UTC.