Alaska earthquakes

M3.4 earthquake 27 km WSW of Cooper Landing, Alaska

A magnitude 3.4 earthquake struck 27 km WSW of Cooper Landing, Alaska on Thu, Oct 21, 2021, 6:39 PM AKDT (02:39 UTC), 41 km (25 mi) below the surface.

A larger quake followed: M3.5 11 km NNE of Hope, Alaska. This one was a foreshock.

Funny River forecastMore in Alaska

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
2021-10-22 02:39:46 UTC
Depth
40.8 km (25.4 mi), shallow
Epicenter
60.353° N, 150.246° W
Region
Alaska
Felt reports
7
Strongest shaking
III, weak shaking
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
3.4ML, local (Richter)Alaska Earthquake CenterPreferred · Preliminary
3.6ML, local (Richter)USGS National Earthquake Information CenterReviewed · ±0.027 · 183 stations

Shaking

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

Strongest estimated
III, weak shaking
Peak ground acceleration
0.6% of gravity
Peak ground velocity
-2.0 cm/s
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

7 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Stations used
173

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 186 in the 60 days after this one and 76 in the 30 days before it.

After

  1. 1.628 km NW of Nikiski, Alaska · 1807 days ago · 75 km deep · 96 km away
  2. 1.520 km SSE of Point Possession, Alaska · 1807 days ago · 13 km deep · 47 km away
  3. 1.77 km N of Ninilchik, Alaska · 1805 days ago · 70 km deep · 84 km away
  4. 1.514 km W of Point Possession, Alaska · 1802 days ago · 8 km deep · 74 km away
  5. 1.628 km WNW of Clam Gulch, Alaska · 1802 days ago · 87 km deep · 92 km away
  6. 1.57 km SW of Hope, Alaska · 1802 days ago · 41 km deep · 64 km away
  7. 2.622 km E of Funny River, Alaska · 1802 days ago · 39 km deep · 16 km away
  8. 1.92 km SE of Ninilchik, Alaska · 1802 days ago · 71 km deep · 84 km away
  9. 1.619 km SE of Kasilof, Alaska · 1801 days ago · 61 km deep · 43 km away
  10. 1.612 km ESE of Bear Creek, Alaska · 1800 days ago · 11 km deep · 64 km away
  11. 1.5Kenai Peninsula, Alaska · 1800 days ago · 41 km deep · 56 km away
  12. 2.523 km WNW of Nikiski, Alaska · 1799 days ago · 79 km deep · 91 km away
  13. 1.78 km E of Salamatof, Alaska · 1799 days ago · 51 km deep · 59 km away
  14. 1.620 km ESE of Clam Gulch, Alaska · 1799 days ago · 52 km deep · 51 km away
  15. 1.810 km NNE of Cooper Landing, Alaska · 1798 days ago · 36 km deep · 37 km away
  16. 1.524 km WSW of Cooper Landing, Alaska · 1798 days ago · 42 km deep · 8 km away
  17. 1.67 km W of Soldotna, Alaska · 1798 days ago · 57 km deep · 54 km away
  18. 1.510 km SSW of Girdwood, Alaska · 1797 days ago · 25 km deep · 79 km away
  19. 1.6Kenai Peninsula, Alaska · 1797 days ago · 85 km deep · 95 km away
  20. 1.714 km NW of Ninilchik, Alaska · 1797 days ago · 70 km deep · 92 km away
  21. 2.09 km NNE of Ninilchik, Alaska · 1797 days ago · 58 km deep · 78 km away
  22. 3.114 km WSW of Clam Gulch, Alaska · 1797 days ago · 64 km deep · 79 km away · felt by 1
  23. 1.78 km W of Ninilchik, Alaska · 1797 days ago · 56 km deep · 94 km away
  24. 2.08 km SE of Tyonek, Alaska · 1797 days ago · 6 km deep · 85 km away
  25. 1.614 km ESE of Clam Gulch, Alaska · 1797 days ago · 66 km deep · 56 km away
  26. 3.415 km W of Clam Gulch, Alaska · 1797 days ago · 66 km deep · 80 km away · felt by 1
  27. 1.6Kenai Peninsula, Alaska · 1797 days ago · 55 km deep · 69 km away
  28. 1.82 km ENE of Point Possession, Alaska · 1797 days ago · 45 km deep · 68 km away
  29. 1.714 km ESE of Point Possession, Alaska · 1796 days ago · 27 km deep · 57 km away
  30. 1.77 km SSW of Hope, Alaska · 1796 days ago · 28 km deep · 64 km away
  31. 2.1Kenai Peninsula, Alaska · 1796 days ago · 93 km deep · 97 km away
  32. 2.8Kenai Peninsula, Alaska · 1796 days ago · 65 km deep · 84 km away
  33. 1.623 km WNW of Clam Gulch, Alaska · 1796 days ago · 73 km deep · 84 km away
  34. 1.837 km W of Kalifornsky, Alaska · 1795 days ago · 85 km deep · 95 km away
  35. 1.519 km SW of Point Possession, Alaska · 1795 days ago · 63 km deep · 60 km away
  36. 1.619 km SSW of Whittier, Alaska · 1795 days ago · 13 km deep · 83 km away
  37. 1.911 km SW of Clam Gulch, Alaska · 1795 days ago · 39 km deep · 74 km away
  38. 1.612 km NW of Happy Valley, Alaska · 1795 days ago · 68 km deep · 98 km away
  39. 2.220 km ENE of Sterling, Alaska · 1794 days ago · 39 km deep · 34 km away
  40. 1.712 km NW of Ninilchik, Alaska · 1794 days ago · 65 km deep · 92 km away
  41. 1.53 km NNW of Point Possession, Alaska · 1794 days ago · 47 km deep · 71 km away
  42. 1.817 km NE of Sterling, Alaska · 1794 days ago · 49 km deep · 35 km away
  43. 1.612 km SSE of Clam Gulch, Alaska · 1793 days ago · 58 km deep · 62 km away
  44. 1.5Kenai Peninsula, Alaska · 1791 days ago · 9 km deep · 46 km away
  45. 1.514 km W of Cooper Landing, Alaska · 1790 days ago · 34 km deep · 17 km away
  46. 1.821 km SE of Clam Gulch, Alaska · 1790 days ago · 59 km deep · 53 km away
  47. 1.821 km SE of Clam Gulch, Alaska · 1790 days ago · 59 km deep · 53 km away
  48. 2.15 km ENE of Cooper Landing, Alaska · 1790 days ago · 10 km deep · 33 km away · felt by 1
  49. 2.019 km E of Point Possession, Alaska · 1790 days ago · 45 km deep · 62 km away
  50. 1.68 km SSE of Soldotna, Alaska · 1790 days ago · 47 km deep · 41 km away
  51. 2.121 km ESE of Kasilof, Alaska · 1790 days ago · 62 km deep · 38 km away
  52. 1.515 km W of Anchorage, Alaska · 1790 days ago · 34 km deep · 98 km away
  53. 1.625 km WNW of Seward, Alaska · 1790 days ago · 29 km deep · 29 km away
  54. 1.727 km ENE of Beluga, Alaska · 1789 days ago · 52 km deep · 96 km away
  55. 1.74 km SSW of Girdwood, Alaska · 1789 days ago · 14 km deep · 84 km away
  56. 1.62 km NE of Funny River, Alaska · 1789 days ago · 49 km deep · 32 km away
  57. 1.511 km WNW of Nikiski, Alaska · 1789 days ago · 68 km deep · 79 km away
  58. 2.115 km ESE of Point Possession, Alaska · 1788 days ago · 43 km deep · 57 km away
  59. 1.822 km NW of Ninilchik, Alaska · 1788 days ago · 74 km deep · 97 km away
  60. 2.024 km WNW of Salamatof, Alaska · 1787 days ago · 80 km deep · 90 km away

The first 60 of 186.

Before

  1. 2.07 km W of Funny River, Alaska · 1807 days ago · 14 km deep · 39 km away
  2. 2.017 km E of Ninilchik, Alaska · 1807 days ago · 52 km deep · 69 km away
  3. 1.718 km WNW of Clam Gulch, Alaska · 1808 days ago · 63 km deep · 82 km away
  4. 1.629 km WSW of Salamatof, Alaska · 1808 days ago · 71 km deep · 90 km away
  5. 2.223 km SE of Fox River, Alaska · 1808 days ago · 31 km deep · 74 km away
  6. 1.812 km NE of Ninilchik, Alaska · 1809 days ago · 47 km deep · 75 km away
  7. 1.66 km E of Halibut Cove, Alaska · 1809 days ago · 45 km deep · 97 km away
  8. 1.514 km SW of Salamatof, Alaska · 1809 days ago · 66 km deep · 74 km away
  9. 1.745 km W of Seward, Alaska · 1810 days ago · 36 km deep · 30 km away
  10. 1.76 km NW of Ninilchik, Alaska · 1810 days ago · 46 km deep · 88 km away
  11. 1.611 km NE of Ninilchik, Alaska · 1810 days ago · 46 km deep · 75 km away
  12. 1.511 km SE of Point Possession, Alaska · 1811 days ago · 42 km deep · 57 km away
  13. 2.022 km ESE of Kasilof, Alaska · 1811 days ago · 62 km deep · 36 km away
  14. 1.811 km NE of Ninilchik, Alaska · 1811 days ago · 46 km deep · 76 km away
  15. 1.87 km NNE of Sterling, Alaska · 1811 days ago · 40 km deep · 37 km away · felt by 1
  16. 2.211 km NE of Ninilchik, Alaska · 1811 days ago · 51 km deep · 75 km away
  17. 1.634 km W of Salamatof, Alaska · 1812 days ago · 80 km deep · 99 km away
  18. 1.612 km SW of Clam Gulch, Alaska · 1812 days ago · 48 km deep · 74 km away
  19. 1.53 km WNW of Happy Valley, Alaska · 1812 days ago · 62 km deep · 96 km away
  20. 2.310 km SSW of Clam Gulch, Alaska · 1812 days ago · 48 km deep · 72 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021djwypch (also filed as us6000fwml). Read Sat, Oct 3, 2026, 6:57 AM UTC.