Alaska earthquakes

M1.8 earthquake 29 km NNW of Susitna, Alaska

A magnitude 1.8 earthquake struck 29 km NNW of Susitna, Alaska on Mon, Dec 20, 2021, 2:05 AM AKST (11:05 UTC), 65 km (40 mi) below the surface.

A larger quake followed: M4.0 40 km W of Petersville, Alaska. This one was a foreshock.

Willow 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
1.8 (ml), micro
Local time
UTC
2021-12-20 11:05:58 UTC
Depth
64.7 km (40.2 mi), shallow
Epicenter
61.796° N, 150.654° W
Region
Alaska
Felt reports
1
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, 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
94

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and 183 in the 30 days before it.

After

  1. 1.931 km SE of Skwentna, Alaska · 1741 days ago · 76 km deep · 17 km away
  2. 1.526 km WNW of Petersville, Alaska · 1741 days ago · 82 km deep · 91 km away
  3. 1.748 km WNW of Skwentna, Alaska · 1741 days ago · 0 km deep · 93 km away
  4. 1.516 km NE of Willow, Alaska · 1740 days ago · 58 km deep · 44 km away
  5. 2.39 km ENE of Big Lake, Alaska · 1740 days ago · 51 km deep · 54 km away · felt by 4
  6. 1.511 km N of Point Possession, Alaska · 1739 days ago · 52 km deep · 85 km away
  7. 1.834 km N of Skwentna, Alaska · 1739 days ago · 85 km deep · 68 km away
  8. 2.421 km WSW of Anchorage, Alaska · 1739 days ago · 43 km deep · 76 km away · felt by 1
  9. 1.550 km WNW of Beluga, Alaska · 1738 days ago · 92 km deep · 87 km away
  10. 2.64 km S of Houston, Alaska · 1738 days ago · 19 km deep · 50 km away · felt by 2
  11. 1.616 km SW of Trapper Creek, Alaska · 1738 days ago · 11 km deep · 49 km away
  12. 1.643 km WNW of Skwentna, Alaska · 1738 days ago · 107 km deep · 88 km away
  13. 1.518 km SW of Petersville, Alaska · 1738 days ago · 73 km deep · 70 km away
  14. 1.527 km NNW of Beluga, Alaska · 1738 days ago · 74 km deep · 58 km away
  15. 1.516 km SSE of Skwentna, Alaska · 1737 days ago · 77 km deep · 36 km away
  16. 1.527 km WSW of Skwentna, Alaska · 1737 days ago · 101 km deep · 68 km away
  17. 1.641 km SW of Skwentna, Alaska · 1737 days ago · 91 km deep · 65 km away
  18. 1.819 km WNW of Petersville, Alaska · 1737 days ago · 81 km deep · 88 km away
  19. 1.65 km NNE of Point MacKenzie, Alaska · 1736 days ago · 45 km deep · 57 km away
  20. 1.55 km NNW of Trapper Creek, Alaska · 1736 days ago · 16 km deep · 65 km away
  21. 2.047 km S of Skwentna, Alaska · 1736 days ago · 77 km deep · 48 km away
  22. 1.558 km SW of Skwentna, Alaska · 1736 days ago · 111 km deep · 81 km away
  23. 3.22 km WNW of Point MacKenzie, Alaska · 1736 days ago · 44 km deep · 58 km away · felt by 33
  24. 1.635 km WNW of Beluga, Alaska · 1736 days ago · 78 km deep · 85 km away
  25. 1.522 km WNW of Petersville, Alaska · 1736 days ago · 92 km deep · 91 km away
  26. 2.725 km SSW of Susitna, Alaska · 1736 days ago · 54 km deep · 51 km away
  27. 1.522 km WNW of Willow, Alaska · 1735 days ago · 60 km deep · 12 km away
  28. 1.629 km W of Petersville, Alaska · 1735 days ago · 86 km deep · 88 km away
  29. 1.547 km WNW of Tyonek, Alaska · 1735 days ago · 90 km deep · 94 km away
  30. 1.716 km WSW of Susitna, Alaska · 1735 days ago · 69 km deep · 35 km away
  31. 1.532 km N of Beluga, Alaska · 1735 days ago · 69 km deep · 47 km away
  32. 1.84 km SSE of Big Lake, Alaska · 1735 days ago · 41 km deep · 52 km away
  33. 1.541 km WSW of Petersville, Alaska · 1734 days ago · 90 km deep · 80 km away
  34. 1.836 km NE of Susitna North, Alaska · 1734 days ago · 55 km deep · 94 km away
  35. 1.732 km SSW of Petersville, Alaska · 1733 days ago · 67 km deep · 51 km away
  36. 1.55 km ESE of Big Lake, Alaska · 1733 days ago · 25 km deep · 54 km away
  37. 1.825 km W of Susitna, Alaska · 1733 days ago · 70 km deep · 31 km away · felt by 1
  38. 1.62 km E of Big Lake, Alaska · 1732 days ago · 35 km deep · 50 km away
  39. 1.645 km NW of Skwentna, Alaska · 1732 days ago · 99 km deep · 89 km away
  40. 2.021 km ESE of Skwentna, Alaska · 1731 days ago · 68 km deep · 23 km away
  41. 1.734 km NNW of Skwentna, Alaska · 1731 days ago · 91 km deep · 76 km away
  42. 2.210 km ESE of Talkeetna, Alaska · 1731 days ago · 2 km deep · 67 km away
  43. 1.76 km NW of Big Lake, Alaska · 1731 days ago · 41 km deep · 41 km away
  44. 1.926 km W of Petersville, Alaska · 1731 days ago · 82 km deep · 85 km away
  45. 1.828 km SW of Susitna, Alaska · 1731 days ago · 67 km deep · 47 km away
  46. 1.529 km WNW of Petersville, Alaska · 1731 days ago · 85 km deep · 94 km away
  47. 1.750 km WNW of Beluga, Alaska · 1730 days ago · 92 km deep · 78 km away
  48. 1.916 km WNW of Trapper Creek, Alaska · 1730 days ago · 64 km deep · 64 km away
  49. 2.02 km NE of Tyonek, Alaska · 1730 days ago · 64 km deep · 82 km away
  50. 1.615 km ESE of Eagle River, Alaska · 1730 days ago · 27 km deep · 93 km away
  51. 1.536 km WNW of Tyonek, Alaska · 1730 days ago · 78 km deep · 88 km away
  52. 1.534 km ENE of Susitna North, Alaska · 1730 days ago · 36 km deep · 90 km away
  53. 1.620 km E of Skwentna, Alaska · 1730 days ago · 64 km deep · 29 km away
  54. 1.51 km SW of Susitna, Alaska · 1730 days ago · 59 km deep · 30 km away
  55. 1.515 km S of Susitna North, Alaska · 1729 days ago · 44 km deep · 48 km away
  56. 1.612 km NE of Susitna North, Alaska · 1729 days ago · 55 km deep · 71 km away
  57. 2.12 km S of Houston, Alaska · 1729 days ago · 33 km deep · 49 km away
  58. 1.528 km WNW of Petersville, Alaska · 1729 days ago · 93 km deep · 98 km away
  59. 1.5Central Alaska · 1728 days ago · 91 km deep · 93 km away
  60. 2.91 km N of Point MacKenzie, Alaska · 1728 days ago · 36 km deep · 59 km away · felt by 9

The first 60 of at least 201.

Before

  1. 3.126 km WNW of Susitna, Alaska · 1742 days ago · 63 km deep · 23 km away · felt by 1
  2. 3.140 km W of Skwentna, Alaska · 1742 days ago · 123 km deep · 80 km away
  3. 1.57 km SSW of Big Lake, Alaska · 1743 days ago · 31 km deep · 50 km away
  4. 1.529 km NW of Beluga, Alaska · 1743 days ago · 76 km deep · 73 km away
  5. 1.941 km WNW of Skwentna, Alaska · 1743 days ago · 105 km deep · 86 km away
  6. 1.745 km NW of Skwentna, Alaska · 1743 days ago · 100 km deep · 89 km away
  7. 2.511 km NNE of Skwentna, Alaska · 1744 days ago · 76 km deep · 46 km away
  8. 1.86 km NNW of Point MacKenzie, Alaska · 1744 days ago · 27 km deep · 54 km away
  9. 1.635 km N of Skwentna, Alaska · 1744 days ago · 85 km deep · 71 km away
  10. 1.58 km N of Tanaina, Alaska · 1744 days ago · 28 km deep · 65 km away
  11. 1.65 km NW of Knik, Alaska · 1744 days ago · 37 km deep · 57 km away
  12. 1.928 km WNW of Susitna, Alaska · 1744 days ago · 65 km deep · 26 km away
  13. 1.824 km WNW of Willow, Alaska · 1744 days ago · 45 km deep · 12 km away
  14. 1.658 km SW of Skwentna, Alaska · 1745 days ago · 132 km deep · 88 km away
  15. 1.514 km SW of Point MacKenzie, Alaska · 1745 days ago · 37 km deep · 64 km away · felt by 4
  16. 1.68 km W of Point MacKenzie, Alaska · 1745 days ago · 39 km deep · 55 km away
  17. 1.634 km S of Skwentna, Alaska · 1745 days ago · 71 km deep · 35 km away
  18. 1.6Southern Alaska · 1745 days ago · 10 km deep · 23 km away
  19. 2.012 km NE of Susitna North, Alaska · 1746 days ago · 48 km deep · 71 km away
  20. 1.828 km S of Susitna, Alaska · 1746 days ago · 62 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021g9mttmi. Read Sun, Sep 27, 2026, 3:47 AM UTC.