Alaska earthquakes

M2.3 earthquake 40 km SSE of Chignik, Alaska

A magnitude 2.3 earthquake struck 40 km SSE of Chignik, Alaska on Thu, Sep 17, 2026, 4:16 PM AKDT (00:16 UTC), 55 km (34 mi) below the surface.

Automatic solution: the magnitude and location may still be revised.

A larger quake followed: M2.4 49 km ESE of Chignik, 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
2.3 (ml), micro
Local time
UTC
2026-09-18 00:16:01 UTC
Depth
54.9 km (34.1 mi), shallow
Epicenter
55.963° N, 158.140° W
Region
Alaska
Tsunami flag
No
Status
Automatic solution, may be revised

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

An automatic solution; a seismologist may revise it.

Location uncertainty
About 11.4 km horizontally, 6.4 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
194°, poorly surrounded by stations
Stations used
35

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 4 since this one and 22 in the 30 days before it.

After

  1. 2.1109 km E of Chignik, Alaska · 4 days ago · 5 km deep · 95 km away
  2. 2.449 km ESE of Chignik, Alaska · 4 days ago · 52 km deep · 41 km away
  3. 3.655 km SE of Chignik, Alaska · 41 hr ago · 34 km deep · 23 km away
  4. 2.216 km N of Ivanof Bay, Alaska · 29 hr ago · 113 km deep · 86 km away

Before

  1. 2.5120 km ESE of Perryville, Alaska · 5 days ago · 5 km deep · 81 km away
  2. 2.130 km E of Chignik, Alaska · 7 days ago · 10 km deep · 40 km away
  3. 1.751 km NE of Chignik, Alaska · 9 days ago · 84 km deep · 78 km away
  4. 2.071 km SSE of Chignik, Alaska · 10 days ago · 2 km deep · 32 km away
  5. 2.090 km E of Chignik, Alaska · 10 days ago · 12 km deep · 77 km away
  6. 2.160 km ESE of Chignik, Alaska · 10 days ago · 24 km deep · 40 km away
  7. 2.361 km S of Ivanof Bay, Alaska · 11 days ago · 2 km deep · 99 km away
  8. 2.242 km SSE of Perryville, Alaska · 11 days ago · 10 km deep · 61 km away
  9. 2.713 km NW of Chignik Lake, Alaska · 13 days ago · 7 km deep · 63 km away
  10. 2.816 km W of Ivanof Bay, Alaska · 16 days ago · 9 km deep · 100 km away
  11. 3.9125 km SE of Perryville, Alaska · 24 days ago · 118 km deep · 97 km away
  12. 2.514 km WNW of Ivanof Bay, Alaska · 24 days ago · 11 km deep · 97 km away
  13. 2.326 km E of Chignik, Alaska · 25 days ago · 84 km deep · 36 km away
  14. 2.060 km S of Perryville, Alaska · 26 days ago · 83 km deep · 91 km away
  15. 2.060 km SE of Chignik, Alaska · 26 days ago · 5 km deep · 27 km away
  16. 2.289 km E of Chignik, Alaska · 26 days ago · 29 km deep · 87 km away
  17. 3.028 km ENE of Chignik, Alaska · 29 days ago · 86 km deep · 50 km away
  18. 2.138 km ENE of Chignik, Alaska · 29 days ago · 88 km deep · 51 km away
  19. 3.044 km ESE of Perryville, Alaska · 31 days ago · 54 km deep · 28 km away
  20. 2.267 km E of Chignik, Alaska · 31 days ago · 20 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event aka2026smgfqs. Read Tue, Sep 22, 2026, 10:28 AM UTC.