California earthquakes

M2.5 earthquake 11 km NNW of Alderpoint, California

A magnitude 2.5 earthquake struck 11 km NNW of Alderpoint, California on Tue, Dec 29, 1981, 6:21 AM PST (14:21 UTC), 24 km (15 mi) below the surface.

A larger quake followed: M3.8 32 km SW of Scotia, California. This one was a foreshock.

Miranda 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
2.5 (md), micro
Local time
UTC
1981-12-29 14:21:01 UTC
Depth
23.8 km (14.8 mi), shallow
Epicenter
40.281° N, 123.646° 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 0.4 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
75°
Stations used
23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 97 in the 60 days after this one and 59 in the 30 days before it.

After

  1. 3.57 km N of Brooktrails, California · 16345 days ago · 7 km deep · 89 km away
  2. 3.2near the coast of Northern California · 16344 days ago · 8 km deep · 89 km away
  3. 1.819 km WSW of Ferndale, California · 16344 days ago · 23 km deep · 76 km away
  4. 1.614 km ESE of Pine Hills, California · 16344 days ago · 23 km deep · 54 km away
  5. 1.57 km N of Brooktrails, California · 16343 days ago · 8 km deep · 89 km away
  6. 2.69 km WSW of Indianola, California · 16343 days ago · 11 km deep · 73 km away
  7. 2.16 km ENE of Willits, California · 16342 days ago · 3 km deep · 99 km away
  8. 1.52 km ENE of Westhaven-Moonstone, California · 16342 days ago · 23 km deep · 93 km away
  9. 1.710 km NNE of Redcrest, California · 16341 days ago · 20 km deep · 33 km away
  10. 1.732 km SW of Scotia, California · 16340 days ago · 5 km deep · 64 km away
  11. 1.932 km SW of Scotia, California · 16340 days ago · 20 km deep · 62 km away
  12. 2.41 km ENE of Loleta, California · 16340 days ago · 21 km deep · 62 km away
  13. 1.516 km WSW of Ferndale, California · 16340 days ago · 20 km deep · 70 km away
  14. 2.014 km SSW of Covelo, California · 16339 days ago · 6 km deep · 74 km away
  15. 2.119 km NNE of Redcrest, California · 16339 days ago · 4 km deep · 36 km away
  16. 2.53 km S of Indianola, California · 16339 days ago · 15 km deep · 67 km away
  17. 2.113 km NNW of Ruth, California · 16338 days ago · 26 km deep · 25 km away
  18. 1.651 km SW of Ferndale, California · 16338 days ago · 13 km deep · 95 km away
  19. 3.15 km WSW of McKinleyville, California · 16338 days ago · 0 km deep · 84 km away
  20. 1.635 km SSW of Ferndale, California · 16337 days ago · 27 km deep · 69 km away
  21. 2.538 km SW of Ferndale, California · 16337 days ago · 21 km deep · 77 km away
  22. 3.325 km SW of Ferndale, California · 16336 days ago · 19 km deep · 67 km away
  23. 2.417 km WSW of Ferndale, California · 16336 days ago · 22 km deep · 74 km away
  24. 1.630 km WNW of Ferndale, California · 16335 days ago · 28 km deep · 92 km away
  25. 1.84 km ENE of Miranda, California · 16335 days ago · 30 km deep · 12 km away
  26. 3.832 km SW of Scotia, California · 16335 days ago · 23 km deep · 62 km away
  27. 2.633 km SW of Scotia, California · 16335 days ago · 23 km deep · 63 km away
  28. 3.433 km SW of Scotia, California · 16335 days ago · 23 km deep · 63 km away
  29. 1.913 km SW of Hayfork, California · 16334 days ago · 22 km deep · 36 km away
  30. 2.015 km ENE of Redcrest, California · 16334 days ago · 25 km deep · 20 km away
  31. 1.629 km SW of Scotia, California · 16333 days ago · 20 km deep · 58 km away
  32. 2.133 km SW of Ferndale, California · 16332 days ago · 24 km deep · 77 km away
  33. 2.48 km NE of Hydesville, California · 16331 days ago · 19 km deep · 48 km away
  34. 2.415 km W of Mad River, California · 16331 days ago · 4 km deep · 17 km away
  35. 1.741 km WSW of Ferndale, California · 16330 days ago · 16 km deep · 89 km away
  36. 2.026 km W of Elk Creek, California · 16330 days ago · 3 km deep · 98 km away
  37. 2.146 km WSW of Ferndale, California · 16329 days ago · 15 km deep · 97 km away
  38. 1.64 km NNE of Myers Flat, California · 16329 days ago · 20 km deep · 18 km away
  39. 1.9near the coast of Northern California · 16329 days ago · 4 km deep · 70 km away
  40. 1.56 km WSW of Scotia, California · 16326 days ago · 27 km deep · 48 km away
  41. 1.625 km SE of Covelo, California · 16326 days ago · 9 km deep · 89 km away
  42. 2.122 km NNW of Shelter Cove, California · 16326 days ago · 7 km deep · 47 km away
  43. 1.924 km SE of Covelo, California · 16325 days ago · 3 km deep · 89 km away
  44. 2.025 km SE of Covelo, California · 16325 days ago · 9 km deep · 89 km away
  45. 2.811 km E of Redcrest, California · 16325 days ago · 21 km deep · 19 km away
  46. 1.513 km SSW of Scotia, California · 16325 days ago · 25 km deep · 47 km away
  47. 2.033 km SW of Scotia, California · 16322 days ago · 22 km deep · 63 km away
  48. 1.612 km SSE of Laytonville, California · 16321 days ago · 8 km deep · 79 km away
  49. 2.228 km SW of Scotia, California · 16320 days ago · 4 km deep · 57 km away
  50. 2.111 km E of Hydesville, California · 16319 days ago · 20 km deep · 40 km away
  51. 1.819 km NE of Hydesville, California · 16316 days ago · 23 km deep · 47 km away
  52. 2.24 km WSW of Loleta, California · 16316 days ago · 19 km deep · 65 km away
  53. 1.625 km WSW of Ferndale, California · 16314 days ago · 22 km deep · 78 km away
  54. 1.929 km SSW of Ferndale, California · 16314 days ago · 17 km deep · 68 km away
  55. 1.719 km WSW of Ferndale, California · 16313 days ago · 22 km deep · 75 km away
  56. 2.928 km NW of Shelter Cove, California · 16312 days ago · 4 km deep · 60 km away
  57. 2.627 km SW of Ferndale, California · 16312 days ago · 18 km deep · 72 km away
  58. 2.219 km WNW of Indianola, California · 16311 days ago · 24 km deep · 85 km away
  59. 1.64 km SSE of Ferndale, California · 16310 days ago · 25 km deep · 59 km away
  60. 2.119 km W of Hyampom, California · 16310 days ago · 11 km deep · 38 km away

The first 60 of 97.

Before

  1. 1.63 km NE of Willits, California · 16346 days ago · 5 km deep · 99 km away
  2. 1.611 km WSW of Redcrest, California · 16347 days ago · 26 km deep · 37 km away
  3. 1.84 km WSW of Ferndale, California · 16347 days ago · 7 km deep · 64 km away
  4. 2.117 km NNW of Willow Creek, California · 16347 days ago · 33 km deep · 89 km away
  5. 1.511 km N of Brooktrails, California · 16347 days ago · 6 km deep · 84 km away
  6. 2.06 km ESE of Ferndale, California · 16347 days ago · 12 km deep · 55 km away
  7. 2.536 km SW of Ferndale, California · 16348 days ago · 26 km deep · 77 km away
  8. 3.538 km SW of Ferndale, California · 16348 days ago · 27 km deep · 77 km away
  9. 1.631 km ESE of Covelo, California · 16351 days ago · 7 km deep · 90 km away
  10. 1.82 km E of Pine Hills, California · 16351 days ago · 4 km deep · 64 km away
  11. 2.337 km SW of Ferndale, California · 16351 days ago · 22 km deep · 74 km away
  12. 2.149 km SW of Ferndale, California · 16353 days ago · 25 km deep · 91 km away
  13. 1.54 km S of Scotia, California · 16353 days ago · 25 km deep · 43 km away
  14. 1.813 km WSW of Willow Creek, California · 16354 days ago · 23 km deep · 70 km away
  15. 1.611 km ENE of Scotia, California · 16354 days ago · 3 km deep · 38 km away
  16. 1.541 km SW of Ferndale, California · 16354 days ago · 15 km deep · 77 km away
  17. 2.210 km W of Laytonville, California · 16355 days ago · 49 km deep · 64 km away
  18. 1.69 km NNE of Laytonville, California · 16355 days ago · 4 km deep · 59 km away
  19. 1.618 km SW of Scotia, California · 16356 days ago · 33 km deep · 50 km away
  20. 2.815 km SW of Ferndale, California · 16356 days ago · 22 km deep · 67 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1070773. Read Tue, Sep 29, 2026, 11:07 PM UTC.