Alaska earthquakes

M3.1 earthquake 136 km E of McCarthy, Alaska

A magnitude 3.1 earthquake struck 136 km E of McCarthy, Alaska on Sat, Jul 17, 2021, 1:47 PM AKDT (21:47 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M4.1 86 km E of McCarthy, Alaska. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
3.1 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2021-07-17 21:47:05 UTC
Depth
3.1 km (2.0 mi), shallow
Epicenter
61.462° N, 140.365° 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
3.1ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.037 · 98 stations
2.9ML, 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 3.2 km horizontally, 11.5 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
95°
Stations used
56

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 1.5118 km E of McCarthy, Alaska · 1900 days ago · 3 km deep · 27 km away
  2. 1.8111 km NW of Haines Junction, Canada · 1893 days ago · 7 km deep · 85 km away
  3. 2.1147 km SSE of Alcan Border, Alaska · 1887 days ago · 5 km deep · 12 km away
  4. 1.591 km E of McCarthy, Alaska · 1887 days ago · 8 km deep · 49 km away
  5. 1.694 km E of McCarthy, Alaska · 1887 days ago · 0 km deep · 42 km away
  6. 2.098 km E of McCarthy, Alaska · 1874 days ago · 3 km deep · 40 km away
  7. 1.858 km ENE of McCarthy, Alaska · 1873 days ago · 3 km deep · 84 km away
  8. 4.186 km E of McCarthy, Alaska · 1869 days ago · 6 km deep · 51 km away · felt by 1
  9. 2.886 km E of McCarthy, Alaska · 1869 days ago · 4 km deep · 52 km away
  10. 1.589 km E of McCarthy, Alaska · 1869 days ago · 10 km deep · 49 km away
  11. 1.586 km E of McCarthy, Alaska · 1869 days ago · 5 km deep · 52 km away
  12. 2.087 km E of McCarthy, Alaska · 1869 days ago · 7 km deep · 51 km away
  13. 2.187 km E of McCarthy, Alaska · 1869 days ago · 4 km deep · 50 km away
  14. 3.486 km E of McCarthy, Alaska · 1869 days ago · 11 km deep · 51 km away
  15. 1.883 km E of McCarthy, Alaska · 1868 days ago · 8 km deep · 55 km away
  16. 2.487 km E of McCarthy, Alaska · 1868 days ago · 14 km deep · 50 km away
  17. 2.288 km E of McCarthy, Alaska · 1867 days ago · 15 km deep · 50 km away
  18. 1.788 km E of McCarthy, Alaska · 1867 days ago · 11 km deep · 49 km away
  19. 1.688 km E of McCarthy, Alaska · 1861 days ago · 1 km deep · 50 km away
  20. 1.8108 km E of McCarthy, Alaska · 1856 days ago · 9 km deep · 34 km away
  21. 1.690 km E of McCarthy, Alaska · 1849 days ago · 5 km deep · 47 km away
  22. 1.986 km S of Alcan Border, Alaska · 1848 days ago · 3 km deep · 69 km away
  23. 1.691 km E of McCarthy, Alaska · 1846 days ago · 9 km deep · 47 km away
  24. 1.6118 km E of McCarthy, Alaska · 1844 days ago · 9 km deep · 18 km away
  25. 1.9120 km WNW of Haines Junction, Canada · 1844 days ago · 7 km deep · 52 km away

Before

  1. 1.8148 km WNW of Haines Junction, Canada · 1928 days ago · 0 km deep · 38 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000en0c (also filed as ak02193t6wit). Read Thu, Oct 1, 2026, 5:15 PM UTC.