California earthquakes

M1.9 earthquake 23 km SE of Alderpoint, California

A magnitude 1.9 earthquake struck 23 km SE of Alderpoint, California on Tue, Jul 29, 1986, 9:15 AM PDT (16:15 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M4.7 5 km NNE of Brooktrails, California. This one was a foreshock.

Covelo 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
1.9 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1986-07-29 16:15:06 UTC
Depth
-1.2 km (-0.7 mi), shallow
Epicenter
40.009° N, 123.449° 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 0.5 km horizontally, 3.6 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
126°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 55 in the 60 days after this one and 18 in the 30 days before it.

After

  1. 1.87 km NW of Redwood Valley, California · 14675 days ago · -1 km deep · 79 km away
  2. 3.436 km SSW of Ferndale, California · 14673 days ago · 21 km deep · 95 km away
  3. 2.814 km WNW of Hyampom, California · 14672 days ago · 4 km deep · 76 km away
  4. 3.014 km SW of Mad River, California · 14672 days ago · 32 km deep · 41 km away
  5. 2.110 km W of Laytonville, California · 14672 days ago · 29 km deep · 37 km away
  6. 3.62 km SSE of Scotia, California · 14672 days ago · 15 km deep · 74 km away
  7. 3.215 km S of Covelo, California · 14672 days ago · 23 km deep · 44 km away
  8. 4.75 km NNE of Brooktrails, California · 14672 days ago · 58 km deep · 58 km away
  9. 2.511 km ENE of Potter Valley, California · 14672 days ago · 33 km deep · 83 km away
  10. 2.410 km WSW of Ruth, California · 14670 days ago · 28 km deep · 25 km away
  11. 2.511 km WSW of Hyampom, California · 14670 days ago · -1 km deep · 63 km away
  12. 1.829 km WSW of Elk Creek, California · 14667 days ago · 13 km deep · 71 km away
  13. 2.97 km NW of Hyampom, California · 14665 days ago · 4 km deep · 74 km away
  14. 2.317 km E of Burnt Ranch, California · 14665 days ago · 12 km deep · 87 km away
  15. 2.811 km SSW of Willow Creek, California · 14665 days ago · 26 km deep · 95 km away
  16. 3.810 km SW of Willow Creek, California · 14665 days ago · 17 km deep · 98 km away
  17. 1.826 km NE of Potter Valley, California · 14664 days ago · 4 km deep · 74 km away
  18. 2.527 km SSW of Ferndale, California · 14663 days ago · 4 km deep · 88 km away
  19. 3.76 km ENE of Garberville, California · 14659 days ago · 22 km deep · 27 km away
  20. 3.038 km SW of Ferndale, California · 14649 days ago · 19 km deep · 99 km away
  21. 2.19 km SE of Covelo, California · 14647 days ago · 4 km deep · 39 km away
  22. 1.70 km WNW of Redwood Valley, California · 14646 days ago · 6 km deep · 85 km away
  23. 4.015 km W of Albion, California · 14646 days ago · 4 km deep · 99 km away
  24. 1.97 km NNW of Redwood Valley, California · 14644 days ago · 2 km deep · 78 km away
  25. 1.839 km ESE of Ruth, California · 14642 days ago · 12 km deep · 54 km away
  26. 2.125 km SE of Indianola, California · 14642 days ago · 14 km deep · 81 km away
  27. 1.911 km SE of Indianola, California · 14642 days ago · 2 km deep · 94 km away
  28. 2.838 km SW of Ferndale, California · 14642 days ago · 19 km deep · 100 km away
  29. 3.122 km W of Elk Creek, California · 14639 days ago · 30 km deep · 73 km away
  30. 2.015 km SSE of Flournoy, California · 14639 days ago · 4 km deep · 94 km away
  31. 2.64 km S of Mad River, California · 14636 days ago · 21 km deep · 45 km away
  32. 2.10 km SSE of Rio Dell, California · 14636 days ago · 20 km deep · 78 km away
  33. 1.922 km NNE of Upper Lake, California · 14635 days ago · 13 km deep · 90 km away
  34. 3.226 km SW of Ferndale, California · 14634 days ago · 26 km deep · 97 km away
  35. 2.16 km ENE of Hayfork, California · 14634 days ago · 8 km deep · 68 km away
  36. 1.710 km E of Calpella, California · 14633 days ago · 2 km deep · 93 km away
  37. 2.717 km WSW of Burnt Ranch, California · 14633 days ago · 4 km deep · 83 km away
  38. 1.64 km W of Brooktrails, California · 14633 days ago · 4 km deep · 62 km away
  39. 2.43 km NE of Hydesville, California · 14632 days ago · 4 km deep · 81 km away
  40. 2.018 km NE of Upper Lake, California · 14632 days ago · 4 km deep · 97 km away
  41. 4.526 km NE of Potter Valley, California · 14631 days ago · 4 km deep · 78 km away
  42. 1.810 km E of Laytonville, California · 14631 days ago · 4 km deep · 37 km away
  43. 2.22 km NNW of Talmage, California · 14629 days ago · -1 km deep · 98 km away
  44. 1.59 km WNW of Cleone, California · 14629 days ago · 10 km deep · 66 km away
  45. 1.52 km NE of Ukiah, California · 14626 days ago · 16 km deep · 97 km away
  46. 3.323 km SW of Scotia, California · 14624 days ago · 15 km deep · 84 km away
  47. 1.916 km E of Covelo, California · 14623 days ago · -1 km deep · 42 km away
  48. 2.610 km WSW of Rio Dell, California · 14617 days ago · 26 km deep · 84 km away
  49. 2.510 km W of Rio Dell, California · 14617 days ago · 25 km deep · 84 km away
  50. 2.120 km ENE of Potter Valley, California · 14616 days ago · 4 km deep · 84 km away
  51. 2.08 km SSE of Laytonville, California · 14615 days ago · 6 km deep · 43 km away
  52. 2.622 km WSW of Weott, California · 14615 days ago · 9 km deep · 68 km away
  53. 2.722 km WSW of Weott, California · 14615 days ago · 9 km deep · 68 km away
  54. 2.56 km NE of Talmage, California · 14615 days ago · 0 km deep · 97 km away
  55. 1.64 km SE of Laytonville, California · 14615 days ago · 0 km deep · 39 km away

Before

  1. 1.64 km ESE of Redwood Valley, California · 14676 days ago · 20 km deep · 88 km away
  2. 2.07 km E of Willits, California · 14676 days ago · 7 km deep · 70 km away
  3. 2.516 km WSW of Weott, California · 14677 days ago · 0 km deep · 63 km away
  4. 1.515 km SW of Ferndale, California · 14679 days ago · 4 km deep · 95 km away
  5. 3.237 km SW of Ferndale, California · 14680 days ago · 20 km deep · 97 km away
  6. 1.714 km SW of Paskenta, California · 14680 days ago · 4 km deep · 70 km away
  7. 1.9near the coast of Northern California · 14682 days ago · 3 km deep · 64 km away
  8. 2.02 km ESE of Calpella, California · 14682 days ago · 4 km deep · 90 km away
  9. 2.36 km E of Covelo, California · 14682 days ago · 4 km deep · 33 km away
  10. 2.720 km ENE of Potter Valley, California · 14682 days ago · 6 km deep · 84 km away
  11. 2.119 km ENE of Potter Valley, California · 14682 days ago · 5 km deep · 84 km away
  12. 2.813 km ESE of Alderpoint, California · 14686 days ago · -1 km deep · 14 km away
  13. 1.930 km NE of Potter Valley, California · 14687 days ago · 8 km deep · 72 km away
  14. 2.26 km W of Covelo, California · 14689 days ago · 4 km deep · 26 km away
  15. 1.86 km W of Covelo, California · 14690 days ago · 5 km deep · 26 km away
  16. 1.835 km NE of Covelo, California · 14695 days ago · -1 km deep · 44 km away
  17. 1.89 km ESE of Willits, California · 14695 days ago · 8 km deep · 71 km away
  18. 2.99 km ESE of Willits, California · 14702 days ago · 6 km deep · 73 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc10085949. Read Fri, Oct 2, 2026, 8:26 AM UTC.