Alaska earthquakes

M1.8 earthquake 27 km SW of Tyonek, Alaska

A magnitude 1.8 earthquake struck 27 km SW of Tyonek, Alaska on Fri, Apr 23, 2021, 3:37 AM AKDT (11:37 UTC), 71 km (44 mi) below the surface.

A larger quake followed: M4.8 Southern Alaska. This one was a foreshock.

Nikiski 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
2021-04-23 11:37:57 UTC
Depth
70.5 km (43.8 mi), intermediate-depth
Epicenter
60.915° N, 151.531° 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.

Stations used
49

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 199 in the 60 days after this one and 157 in the 30 days before it.

After

  1. 1.823 km NNW of Nikiski, Alaska · 1984 days ago · 49 km deep · 4 km away
  2. 1.818 km SSE of Clam Gulch, Alaska · 1984 days ago · 57 km deep · 94 km away
  3. 1.640 km NW of Beluga, Alaska · 1983 days ago · 79 km deep · 56 km away
  4. 1.544 km WNW of Nikiski, Alaska · 1983 days ago · 83 km deep · 34 km away
  5. 1.920 km WSW of Point MacKenzie, Alaska · 1983 days ago · 48 km deep · 76 km away
  6. 1.536 km NW of Nikiski, Alaska · 1982 days ago · 87 km deep · 15 km away
  7. 1.738 km SW of Skwentna, Alaska · 1982 days ago · 105 km deep · 96 km away
  8. 2.143 km WNW of Clam Gulch, Alaska · 1982 days ago · 86 km deep · 65 km away
  9. 1.965 km W of Tyonek, Alaska · 1981 days ago · 113 km deep · 46 km away
  10. 1.541 km NW of Ninilchik, Alaska · 1981 days ago · 89 km deep · 79 km away
  11. 1.520 km SW of Hope, Alaska · 1981 days ago · 27 km deep · 90 km away
  12. 1.727 km NW of Beluga, Alaska · 1981 days ago · 74 km deep · 46 km away
  13. 2.542 km NW of Ninilchik, Alaska · 1981 days ago · 77 km deep · 76 km away
  14. 2.021 km WNW of Ninilchik, Alaska · 1981 days ago · 65 km deep · 92 km away
  15. 1.559 km W of Tyonek, Alaska · 1980 days ago · 106 km deep · 46 km away
  16. 2.118 km ESE of Clam Gulch, Alaska · 1980 days ago · 51 km deep · 84 km away
  17. 1.519 km WNW of Salamatof, Alaska · 1980 days ago · 72 km deep · 29 km away
  18. 1.577 km W of Tyonek, Alaska · 1980 days ago · 127 km deep · 62 km away
  19. 4.8Southern Alaska · 1980 days ago · 44 km deep · 96 km away · felt by 1,122 · tsunami flag
  20. 1.86 km NW of Point MacKenzie, Alaska · 1979 days ago · 38 km deep · 95 km away
  21. 1.72 km N of Point MacKenzie, Alaska · 1979 days ago · 50 km deep · 98 km away
  22. 2.054 km WNW of Ninilchik, Alaska · 1979 days ago · 90 km deep · 89 km away
  23. 1.813 km ESE of Tyonek, Alaska · 1979 days ago · 20 km deep · 36 km away
  24. 2.124 km WNW of Beluga, Alaska · 1979 days ago · 74 km deep · 32 km away
  25. 2.0Kenai Peninsula, Alaska · 1979 days ago · 81 km deep · 19 km away
  26. 1.555 km WNW of Nikiski, Alaska · 1979 days ago · 107 km deep · 39 km away
  27. 1.857 km W of Salamatof, Alaska · 1978 days ago · 98 km deep · 55 km away
  28. 1.627 km WNW of Cohoe, Alaska · 1978 days ago · 75 km deep · 57 km away
  29. 2.25 km SSW of Point MacKenzie, Alaska · 1977 days ago · 19 km deep · 93 km away · felt by 1
  30. 1.720 km WNW of Salamatof, Alaska · 1975 days ago · 76 km deep · 30 km away
  31. 1.737 km NW of Beluga, Alaska · 1975 days ago · 73 km deep · 51 km away
  32. 1.833 km WNW of Susitna, Alaska · 1974 days ago · 49 km deep · 92 km away
  33. 1.746 km NW of Ninilchik, Alaska · 1974 days ago · 86 km deep · 78 km away
  34. 2.123 km W of Point MacKenzie, Alaska · 1974 days ago · 41 km deep · 77 km away
  35. 1.56 km W of Ninilchik, Alaska · 1974 days ago · 67 km deep · 97 km away
  36. 1.558 km WNW of Beluga, Alaska · 1973 days ago · 105 km deep · 59 km away
  37. 1.782 km W of Salamatof, Alaska · 1973 days ago · 113 km deep · 81 km away
  38. 1.820 km WNW of Salamatof, Alaska · 1973 days ago · 79 km deep · 29 km away
  39. 1.521 km SSE of Clam Gulch, Alaska · 1973 days ago · 59 km deep · 97 km away
  40. 2.114 km SE of Anchorage, Alaska · 1973 days ago · 40 km deep · 99 km away · felt by 2
  41. 2.168 km W of Tyonek, Alaska · 1973 days ago · 111 km deep · 49 km away
  42. 2.410 km S of Anchorage, Alaska · 1972 days ago · 40 km deep · 90 km away
  43. 3.62 km WNW of Ninilchik, Alaska · 1972 days ago · 47 km deep · 96 km away · felt by 10
  44. 2.625 km WNW of Susitna, Alaska · 1972 days ago · 60 km deep · 87 km away · felt by 1
  45. 1.718 km ESE of Beluga, Alaska · 1972 days ago · 0 km deep · 46 km away
  46. 2.74 km SSW of Susitna, Alaska · 1971 days ago · 51 km deep · 85 km away
  47. 2.35 km NW of Point MacKenzie, Alaska · 1971 days ago · 10 km deep · 95 km away
  48. 1.554 km WNW of Ninilchik, Alaska · 1970 days ago · 91 km deep · 91 km away
  49. 1.629 km NW of Nikiski, Alaska · 1970 days ago · 78 km deep · 5 km away
  50. 2.013 km WNW of Salamatof, Alaska · 1970 days ago · 53 km deep · 27 km away
  51. 1.623 km ESE of Point Possession, Alaska · 1970 days ago · 36 km deep · 68 km away
  52. 2.59 km SSE of Kasilof, Alaska · 1969 days ago · 34 km deep · 75 km away
  53. 1.634 km SSW of Skwentna, Alaska · 1969 days ago · 89 km deep · 90 km away
  54. 3.47 km ESE of Kasilof, Alaska · 1968 days ago · 43 km deep · 69 km away · felt by 2
  55. 1.511 km S of Clam Gulch, Alaska · 1968 days ago · 36 km deep · 87 km away
  56. 1.913 km ESE of Clam Gulch, Alaska · 1968 days ago · 35 km deep · 84 km away
  57. 1.539 km WSW of Tyonek, Alaska · 1968 days ago · 77 km deep · 20 km away
  58. 1.664 km W of Nikiski, Alaska · 1967 days ago · 128 km deep · 52 km away
  59. 1.649 km WNW of Nikiski, Alaska · 1967 days ago · 102 km deep · 36 km away
  60. 1.628 km WSW of Susitna, Alaska · 1967 days ago · 63 km deep · 69 km away

The first 60 of at least 199.

Before

  1. 1.529 km WNW of Nikiski, Alaska · 1984 days ago · 81 km deep · 15 km away
  2. 1.81 km S of Soldotna, Alaska · 1984 days ago · 55 km deep · 55 km away
  3. 1.947 km NW of Ninilchik, Alaska · 1984 days ago · 82 km deep · 71 km away
  4. 2.612 km ENE of Point Possession, Alaska · 1985 days ago · 51 km deep · 57 km away · felt by 1
  5. 1.838 km S of Skwentna, Alaska · 1985 days ago · 1 km deep · 83 km away · felt by 1
  6. 2.220 km ENE of Point Possession, Alaska · 1985 days ago · 56 km deep · 65 km away · felt by 1
  7. 2.78 km SW of Clam Gulch, Alaska · 1985 days ago · 62 km deep · 82 km away
  8. 1.566 km WNW of Ninilchik, Alaska · 1985 days ago · 116 km deep · 98 km away
  9. 2.32 km NW of Ridgeway, Alaska · 1985 days ago · 46 km deep · 46 km away
  10. 1.58 km SE of Soldotna, Alaska · 1985 days ago · 55 km deep · 62 km away
  11. 1.568 km W of Tyonek, Alaska · 1985 days ago · 113 km deep · 49 km away
  12. 1.659 km WNW of Ninilchik, Alaska · 1986 days ago · 93 km deep · 89 km away
  13. 1.57 km SE of Point Possession, Alaska · 1986 days ago · 55 km deep · 51 km away
  14. 2.7Kenai Peninsula, Alaska · 1987 days ago · 64 km deep · 85 km away
  15. 2.639 km W of Kalifornsky, Alaska · 1987 days ago · 86 km deep · 57 km away
  16. 3.12 km W of Point MacKenzie, Alaska · 1987 days ago · 39 km deep · 95 km away · felt by 9
  17. 1.669 km W of Salamatof, Alaska · 1988 days ago · 96 km deep · 72 km away
  18. 1.738 km W of Susitna, Alaska · 1988 days ago · 7 km deep · 78 km away
  19. 1.525 km WNW of Ninilchik, Alaska · 1988 days ago · 78 km deep · 91 km away
  20. 1.673 km WNW of Beluga, Alaska · 1988 days ago · 31 km deep · 66 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021572i687. Read Mon, Sep 28, 2026, 5:52 AM UTC.