Alaska earthquakes

M3.4 earthquake 74 km SE of Atka, Alaska

A magnitude 3.4 earthquake struck 74 km SE of Atka, Alaska on Sat, Sep 12, 2026, 6:21 AM HADT (15:21 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M3.6 109 km SE of Atka, 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
3.4 (ML, local (Richter)), minor
Magnitude from
Alaska Earthquake Center
Local time
UTC
2026-09-12 15:21:18 UTC
Depth
13.3 km (8.3 mi), shallow
Epicenter
51.789° N, 173.346° W
Region
Alaska
Strongest shaking
II, weak shaking
Tsunami flag
No
Status
Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated
II, weak shaking
Peak ground acceleration
0.2% of gravity
Peak ground velocity
0.1 cm/s
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS. If you felt it, tell the USGS: every report sharpens the shaking map.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 7.8 km horizontally, 3.1 km in depth
Magnitude uncertainty
±0.10
Station coverage gap
206°, poorly surrounded by stations
Stations used
33

Nearby

Within 100 km, magnitude 1.5 and up: 13 since this one and 39 in the 30 days before it.

After

  1. 2.668 km E of Atka, Alaska · 20 days ago · 4 km deep · 46 km away
  2. 2.571 km SSW of Atka, Alaska · 20 days ago · 12 km deep · 91 km away
  3. 2.599 km SSE of Atka, Alaska · 19 days ago · 13 km deep · 44 km away
  4. 2.471 km ESE of Atka, Alaska · 19 days ago · 60 km deep · 21 km away
  5. 2.360 km SE of Atka, Alaska · 19 days ago · 20 km deep · 14 km away
  6. 2.892 km SSE of Atka, Alaska · 16 days ago · 8 km deep · 47 km away
  7. 2.555 km SSE of Atka, Alaska · 15 days ago · 53 km deep · 48 km away
  8. 3.6109 km SE of Atka, Alaska · 14 days ago · 35 km deep · 39 km away
  9. 2.439 km SSE of Atka, Alaska · 11 days ago · 93 km deep · 41 km away
  10. 1.612 km N of Atka, Alaska · 5 days ago · 15 km deep · 83 km away
  11. 3.325 km E of Atka, Alaska · 5 days ago · 17 km deep · 59 km away
  12. 3.573 km SSW of Atka, Alaska · 5 days ago · 10 km deep · 87 km away
  13. 2.697 km SSE of Atka, Alaska · 4 days ago · 40 km deep · 58 km away

Before

  1. 2.7114 km SE of Atka, Alaska · 20 days ago · 0 km deep · 41 km away
  2. 2.9119 km ESE of Atka, Alaska · 20 days ago · 29 km deep · 55 km away
  3. 3.1118 km ESE of Atka, Alaska · 20 days ago · 11 km deep · 53 km away
  4. 2.452 km SW of Atka, Alaska · 20 days ago · 6 km deep · 94 km away
  5. 2.870 km SSW of Atka, Alaska · 22 days ago · 10 km deep · 81 km away
  6. 2.682 km SSE of Atka, Alaska · 23 days ago · 23 km deep · 28 km away
  7. 2.269 km SSW of Atka, Alaska · 23 days ago · 2 km deep · 78 km away
  8. 2.277 km SSW of Atka, Alaska · 23 days ago · 19 km deep · 90 km away
  9. 2.315 km WNW of Atka, Alaska · 23 days ago · 172 km deep · 90 km away
  10. 3.088 km SE of Atka, Alaska · 24 days ago · 10 km deep · 29 km away
  11. 3.197 km SE of Atka, Alaska · 24 days ago · 6 km deep · 32 km away
  12. 2.982 km SE of Atka, Alaska · 24 days ago · 35 km deep · 21 km away
  13. 3.276 km SSE of Atka, Alaska · 24 days ago · 27 km deep · 29 km away
  14. 3.147 km SE of Atka, Alaska · 30 days ago · 66 km deep · 32 km away
  15. 2.856 km ESE of Atka, Alaska · 31 days ago · 12 km deep · 28 km away
  16. 2.895 km SE of Atka, Alaska · 34 days ago · 5 km deep · 33 km away
  17. 2.616 km WNW of Atka, Alaska · 34 days ago · 170 km deep · 90 km away
  18. 2.162 km SSW of Atka, Alaska · 34 days ago · 42 km deep · 77 km away
  19. 3.789 km SE of Atka, Alaska · 34 days ago · 53 km deep · 23 km away
  20. 2.940 km NE of Atka, Alaska · 35 days ago · 182 km deep · 86 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event aka2026scihfk. Read Fri, Oct 2, 2026, 3:17 PM UTC.