Alaska earthquakes

M2.5 earthquake 35 km W of Chignik Lake, Alaska

A magnitude 2.5 earthquake struck 35 km W of Chignik Lake, Alaska on Sat, Dec 18, 2021, 12:22 AM AKST (09:22 UTC), 6 km (3 mi) below the surface.

A larger quake followed: M2.8 45 km S of Perryville, 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
2.5 (md), micro
Local time
UTC
2021-12-18 09:22:26 UTC
Depth
5.6 km (3.5 mi), shallow
Epicenter
56.217° N, 159.330° 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 0.5 km horizontally, 1.6 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
82°
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 16 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 2.4Alaska Peninsula · 1738 days ago · 63 km deep · 81 km away
  2. 2.845 km S of Perryville, Alaska · 1725 days ago · 11 km deep · 79 km away
  3. 2.546 km S of Perryville, Alaska · 1725 days ago · 27 km deep · 81 km away
  4. 2.420 km SW of Ivanof Bay, Alaska · 1718 days ago · 76 km deep · 55 km away
  5. 1.915 km W of Ivanof Bay, Alaska · 1710 days ago · 7 km deep · 42 km away
  6. 2.245 km SE of Port Heiden, Alaska · 1710 days ago · 87 km deep · 93 km away
  7. 3.045 km NNW of Ivanof Bay, Alaska · 1700 days ago · 160 km deep · 22 km away
  8. 2.359 km SE of Perryville, Alaska · 1697 days ago · 13 km deep · 93 km away
  9. 1.851 km ESE of Perryville, Alaska · 1696 days ago · 25 km deep · 77 km away
  10. 2.351 km SSE of Chignik, Alaska · 1694 days ago · 47 km deep · 85 km away
  11. 2.864 km SE of Perryville, Alaska · 1693 days ago · 17 km deep · 98 km away
  12. 2.159 km SSE of Chignik, Alaska · 1689 days ago · 1 km deep · 93 km away
  13. 2.855 km SE of Perryville, Alaska · 1685 days ago · 39 km deep · 88 km away
  14. 1.720 km SW of Chignik Lake, Alaska · 1683 days ago · 80 km deep · 23 km away
  15. 1.860 km SSE of Ivanof Bay, Alaska · 1681 days ago · 15 km deep · 94 km away
  16. 3.230 km ESE of Chignik, Alaska · 1680 days ago · 64 km deep · 87 km away

Before

  1. 2.23 km SW of Chignik Lagoon, Alaska · 1741 days ago · 83 km deep · 48 km away
  2. 3.756 km S of Ivanof Bay, Alaska · 1743 days ago · 58 km deep · 93 km away
  3. 2.125 km SE of Chignik, Alaska · 1744 days ago · 62 km deep · 79 km away
  4. 2.653 km WNW of Chignik Lake, Alaska · 1745 days ago · 207 km deep · 33 km away
  5. 2.252 km SE of Perryville, Alaska · 1749 days ago · 4 km deep · 86 km away
  6. 2.017 km SSE of Chignik, Alaska · 1752 days ago · 62 km deep · 66 km away
  7. 2.961 km S of Ivanof Bay, Alaska · 1754 days ago · 11 km deep · 96 km away
  8. 3.229 km NNE of Sand Point, Alaska · 1757 days ago · 86 km deep · 93 km away
  9. 2.461 km SE of Perryville, Alaska · 1766 days ago · 17 km deep · 94 km away
  10. 2.252 km SE of Perryville, Alaska · 1767 days ago · 20 km deep · 86 km away
  11. 2.663 km SE of Perryville, Alaska · 1770 days ago · 19 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event av91446421. Read Wed, Sep 23, 2026, 8:37 AM UTC.