Alaska earthquakes

M1.5 earthquake 27 km W of Chignik Lake, Alaska

A magnitude 1.5 earthquake struck 27 km W of Chignik Lake, Alaska on Sun, Oct 17, 2021, 11:30 AM AKDT (19:30 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M2.9 60 km SSE 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
1.5 (ml), micro
Local time
UTC
2021-10-17 19:30:53 UTC
Depth
9.4 km (5.9 mi), shallow
Epicenter
56.281° N, 159.198° 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 0.9 km horizontally, 1.2 km in depth
Magnitude uncertainty
±0.21
Depth from
From location
Station coverage gap
245°, poorly surrounded by stations
Stations used
8

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 27 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 2.960 km SSE of Perryville, Alaska · 1806 days ago · 25 km deep · 99 km away
  2. 2.635 km SSE of Chignik, Alaska · 1805 days ago · 87 km deep · 73 km away
  3. 2.657 km SE of Perryville, Alaska · 1804 days ago · 16 km deep · 95 km away
  4. 2.126 km SSE of Ivanof Bay, Alaska · 1801 days ago · 60 km deep · 66 km away
  5. 2.420 km W of Ivanof Bay, Alaska · 1798 days ago · 119 km deep · 59 km away
  6. 1.841 km NNE of Sand Point, Alaska · 1793 days ago · 107 km deep · 97 km away
  7. 2.446 km E of Chignik, Alaska · 1793 days ago · 50 km deep · 95 km away
  8. 2.157 km NE of Chignik, Alaska · 1790 days ago · 72 km deep · 98 km away
  9. 2.133 km NE of Chignik, Alaska · 1787 days ago · 77 km deep · 78 km away
  10. 2.930 km SSW of Ivanof Bay, Alaska · 1787 days ago · 71 km deep · 76 km away
  11. 2.723 km SW of Ivanof Bay, Alaska · 1787 days ago · 92 km deep · 69 km away
  12. 1.726 km E of Perryville, Alaska · 1786 days ago · 14 km deep · 50 km away
  13. 2.745 km SE of Perryville, Alaska · 1784 days ago · 42 km deep · 82 km away
  14. 2.247 km SSE of Perryville, Alaska · 1783 days ago · 26 km deep · 88 km away
  15. 2.215 km E of Chignik, Alaska · 1781 days ago · 64 km deep · 65 km away
  16. 2.7Alaska Peninsula · 1780 days ago · 13 km deep · 34 km away
  17. 2.244 km SSE of Chignik, Alaska · 1780 days ago · 50 km deep · 77 km away
  18. 2.259 km SE of Perryville, Alaska · 1780 days ago · 14 km deep · 93 km away
  19. 2.333 km SE of Port Heiden, Alaska · 1778 days ago · 86 km deep · 73 km away
  20. 2.663 km SE of Perryville, Alaska · 1777 days ago · 19 km deep · 99 km away
  21. 2.252 km SE of Perryville, Alaska · 1774 days ago · 20 km deep · 87 km away
  22. 2.461 km SE of Perryville, Alaska · 1772 days ago · 17 km deep · 95 km away
  23. 2.017 km SSE of Chignik, Alaska · 1759 days ago · 62 km deep · 59 km away
  24. 2.252 km SE of Perryville, Alaska · 1756 days ago · 4 km deep · 87 km away
  25. 2.653 km WNW of Chignik Lake, Alaska · 1752 days ago · 207 km deep · 31 km away
  26. 2.125 km SE of Chignik, Alaska · 1751 days ago · 62 km deep · 71 km away
  27. 2.154 km ESE of Port Heiden, Alaska · 1749 days ago · 87 km deep · 97 km away

Before

  1. 3.058 km SE of Perryville, Alaska · 1812 days ago · 11 km deep · 93 km away
  2. 2.658 km SE of Perryville, Alaska · 1816 days ago · 11 km deep · 94 km away
  3. 2.122 km N of Ivanof Bay, Alaska · 1820 days ago · 4 km deep · 29 km away
  4. 1.722 km E of Chignik, Alaska · 1820 days ago · 9 km deep · 71 km away
  5. 2.262 km SE of Perryville, Alaska · 1820 days ago · 22 km deep · 96 km away
  6. 2.155 km SE of Perryville, Alaska · 1821 days ago · 14 km deep · 91 km away
  7. 2.460 km SE of Perryville, Alaska · 1827 days ago · 10 km deep · 98 km away
  8. 1.644 km S of Ivanof Bay, Alaska · 1831 days ago · 71 km deep · 88 km away
  9. 1.920 km WNW of Chignik Lake, Alaska · 1834 days ago · 93 km deep · 8 km away
  10. 2.231 km ESE of Chignik, Alaska · 1834 days ago · 61 km deep · 77 km away
  11. 2.0Alaska Peninsula · 1834 days ago · 9 km deep · 96 km away
  12. 1.820 km SSE of Ivanof Bay, Alaska · 1834 days ago · 60 km deep · 61 km away
  13. 3.142 km NE of Nelson Lagoon, Alaska · 1838 days ago · 180 km deep · 91 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event av91394706. Read Wed, Sep 30, 2026, 6:36 AM UTC.