California earthquakes

M2.3 earthquake 12 km SE of Alderpoint, California

A magnitude 2.3 earthquake struck 12 km SE of Alderpoint, California on Sat, Apr 16, 1977, 3:35 AM PST (11:35 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M3.7 28 km SW of Scotia, California. This one was a foreshock.

Garberville forecastMore in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.3 (md), micro
Local time
UTC
1977-04-16 11:35:30 UTC
Depth
26.5 km (16.5 mi), shallow
Epicenter
40.114° N, 123.495° W
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 7.5 km horizontally, 5.6 km in depth
Depth from
From location
Station coverage gap
308°, poorly surrounded by stations
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 45 in the 60 days after this one and 36 in the 30 days before it.

After

  1. 2.031 km SW of Ferndale, California · 18064 days ago · 23 km deep · 89 km away
  2. 2.53 km SW of Garberville, California · 18064 days ago · 14 km deep · 29 km away
  3. 2.527 km SSW of Ferndale, California · 18063 days ago · 25 km deep · 83 km away
  4. 2.310 km S of Ferndale, California · 18059 days ago · 19 km deep · 78 km away
  5. 2.2near the coast of Northern California · 18059 days ago · 21 km deep · 85 km away
  6. 1.86 km WNW of Ferndale, California · 18056 days ago · 26 km deep · 89 km away
  7. 1.79 km W of Indianola, California · 18055 days ago · 22 km deep · 96 km away
  8. 3.227 km SSW of Ferndale, California · 18055 days ago · 20 km deep · 79 km away
  9. 2.740 km SSW of Ferndale, California · 18052 days ago · 13 km deep · 87 km away
  10. 2.314 km SW of Mad River, California · 18050 days ago · 11 km deep · 31 km away
  11. 3.021 km WSW of Weott, California · 18050 days ago · 7 km deep · 56 km away
  12. 2.523 km SSW of Ferndale, California · 18048 days ago · 24 km deep · 83 km away
  13. 2.631 km WSW of Ferndale, California · 18042 days ago · 22 km deep · 100 km away
  14. 2.03 km W of Hydesville, California · 18041 days ago · 5 km deep · 73 km away
  15. 1.85 km W of Willow Creek, California · 18039 days ago · 32 km deep · 92 km away
  16. 2.816 km SW of Ferndale, California · 18039 days ago · 24 km deep · 89 km away
  17. 2.816 km WSW of Ferndale, California · 18039 days ago · 24 km deep · 90 km away
  18. 3.033 km SW of Ferndale, California · 18038 days ago · 24 km deep · 89 km away
  19. 2.59 km S of Hyampom, California · 18038 days ago · 0 km deep · 47 km away
  20. 3.117 km WSW of Scotia, California · 18037 days ago · 20 km deep · 73 km away
  21. 2.316 km WSW of Scotia, California · 18037 days ago · 19 km deep · 73 km away
  22. 1.6near the coast of Northern California · 18032 days ago · 25 km deep · 96 km away
  23. 1.53 km WSW of Bayview, California · 18032 days ago · 24 km deep · 95 km away
  24. 2.75 km WNW of Fields Landing, California · 18032 days ago · 26 km deep · 97 km away
  25. 2.432 km SSW of Ferndale, California · 18032 days ago · 11 km deep · 82 km away
  26. 2.24 km S of Scotia, California · 18029 days ago · 8 km deep · 63 km away
  27. 1.533 km SW of Ferndale, California · 18026 days ago · 16 km deep · 94 km away
  28. 1.716 km NE of Redcrest, California · 18025 days ago · 24 km deep · 49 km away
  29. 1.627 km SSW of Scotia, California · 18025 days ago · 22 km deep · 65 km away
  30. 2.225 km SSW of Ferndale, California · 18023 days ago · 18 km deep · 82 km away
  31. 2.79 km WSW of Redcrest, California · 18022 days ago · 31 km deep · 55 km away
  32. 2.137 km SW of Ferndale, California · 18019 days ago · 22 km deep · 91 km away
  33. 2.515 km NE of Trinity Village, California · 18019 days ago · 31 km deep · 95 km away
  34. 1.74 km ESE of Burnt Ranch, California · 18017 days ago · 20 km deep · 75 km away
  35. 2.412 km E of Blue Lake, California · 18017 days ago · 28 km deep · 89 km away
  36. 1.63 km W of Mad River, California · 18017 days ago · 23 km deep · 38 km away
  37. 2.40 km SSE of Redway, California · 18014 days ago · 18 km deep · 28 km away
  38. 1.722 km SSW of Ferndale, California · 18014 days ago · 19 km deep · 83 km away
  39. 3.728 km SW of Scotia, California · 18010 days ago · 23 km deep · 75 km away
  40. 3.529 km SW of Scotia, California · 18010 days ago · 23 km deep · 76 km away
  41. 1.617 km SW of Scotia, California · 18010 days ago · 29 km deep · 73 km away
  42. 1.728 km SW of Ferndale, California · 18009 days ago · 19 km deep · 87 km away
  43. 1.618 km SW of Ferndale, California · 18009 days ago · 18 km deep · 85 km away
  44. 2.940 km SW of Ferndale, California · 18007 days ago · 23 km deep · 97 km away
  45. 2.08 km W of Rio Dell, California · 18006 days ago · 19 km deep · 73 km away

Before

  1. 1.84 km SW of Indianola, California · 18064 days ago · 23 km deep · 90 km away
  2. 2.528 km SSW of Ferndale, California · 18065 days ago · 19 km deep · 79 km away
  3. 2.730 km SW of Ferndale, California · 18065 days ago · 28 km deep · 96 km away
  4. 2.34 km ESE of Pine Hills, California · 18066 days ago · 24 km deep · 85 km away
  5. 1.614 km ENE of Hyampom, California · 18067 days ago · 4 km deep · 63 km away
  6. 1.715 km NE of Myers Flat, California · 18067 days ago · 27 km deep · 34 km away
  7. 1.510 km NNE of Hayfork, California · 18071 days ago · 5 km deep · 66 km away
  8. 2.412 km N of Hayfork, California · 18072 days ago · 2 km deep · 67 km away
  9. 3.19 km SSW of Junction City, California · 18072 days ago · 52 km deep · 69 km away
  10. 1.832 km WSW of Ferndale, California · 18073 days ago · 21 km deep · 99 km away
  11. 1.77 km W of Rio Dell, California · 18073 days ago · 18 km deep · 73 km away
  12. 2.68 km N of Hayfork, California · 18073 days ago · 10 km deep · 63 km away
  13. 2.89 km ESE of Douglas City, California · 18073 days ago · 4 km deep · 77 km away
  14. 1.526 km SW of Ferndale, California · 18074 days ago · 19 km deep · 94 km away
  15. 1.517 km SSE of Blue Lake, California · 18076 days ago · 24 km deep · 77 km away
  16. 2.627 km SSW of Ferndale, California · 18076 days ago · 27 km deep · 84 km away
  17. 1.74 km WSW of Scotia, California · 18076 days ago · 23 km deep · 68 km away
  18. 1.53 km SW of Mad River, California · 18076 days ago · 28 km deep · 35 km away
  19. 3.023 km WSW of Ferndale, California · 18076 days ago · 22 km deep · 94 km away
  20. 1.919 km W of Ferndale, California · 18077 days ago · 20 km deep · 99 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1034839. Read Wed, Sep 30, 2026, 5:47 PM UTC.