California earthquakes

M2.3 earthquake 19 km NE of Hydesville, California

A magnitude 2.3 earthquake struck 19 km NE of Hydesville, California on Mon, Dec 22, 1986, 10:16 AM PST (18:16 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M3.4 36 km SSW of Ferndale, California. This one was a foreshock.

Hydesville 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
1986-12-22 18:16:03 UTC
Depth
20.9 km (13.0 mi), shallow
Epicenter
40.666° N, 123.928° 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 1.1 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.21
Depth from
From location
Station coverage gap
131°
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 33 in the 60 days after this one and 49 in the 30 days before it.

After

  1. 2.122 km W of Leggett, California · 14518 days ago · 1 km deep · 93 km away
  2. 3.436 km SSW of Ferndale, California · 14517 days ago · 21 km deep · 63 km away
  3. 2.825 km WNW of Ferndale, California · 14513 days ago · 25 km deep · 51 km away
  4. 2.436 km SSW of Ferndale, California · 14513 days ago · 20 km deep · 63 km away
  5. 3.220 km SW of Scotia, California · 14512 days ago · 4 km deep · 45 km away
  6. 3.346 km SW of Ferndale, California · 14510 days ago · 3 km deep · 75 km away
  7. 1.518 km W of Trinity Center, California · 14501 days ago · 4 km deep · 91 km away
  8. 2.52 km WSW of Leggett, California · 14497 days ago · 4 km deep · 92 km away
  9. 2.6near the coast of Northern California · 14495 days ago · 23 km deep · 62 km away
  10. 3.6near the coast of Northern California · 14494 days ago · 3 km deep · 37 km away
  11. 2.48 km S of Scotia, California · 14494 days ago · 4 km deep · 33 km away
  12. 2.719 km NNW of Covelo, California · 14493 days ago · 2 km deep · 93 km away
  13. 2.614 km SE of Blue Lake, California · 14493 days ago · 27 km deep · 16 km away
  14. 2.614 km WSW of Scotia, California · 14493 days ago · 27 km deep · 38 km away
  15. 2.434 km SSW of Ferndale, California · 14491 days ago · 20 km deep · 60 km away
  16. 1.82 km SE of Myers Flat, California · 14491 days ago · 4 km deep · 47 km away
  17. 2.666 km WSW of Ferndale, California · 14491 days ago · 0 km deep · 97 km away
  18. 1.937 km SSW of Ferndale, California · 14490 days ago · 22 km deep · 64 km away
  19. 1.521 km NNW of Covelo, California · 14490 days ago · 0 km deep · 92 km away
  20. 2.318 km ESE of Indianola, California · 14488 days ago · 24 km deep · 7 km away
  21. 2.217 km WSW of Ferndale, California · 14486 days ago · 21 km deep · 48 km away
  22. 1.99 km ESE of Leggett, California · 14482 days ago · 6 km deep · 96 km away
  23. 2.513 km WNW of Mad River, California · 14480 days ago · -1 km deep · 29 km away
  24. 1.724 km SW of Scotia, California · 14478 days ago · 4 km deep · 49 km away
  25. 3.89 km W of Ferndale, California · 14478 days ago · 28 km deep · 39 km away
  26. 2.445 km W of Ferndale, California · 14472 days ago · 24 km deep · 74 km away
  27. 2.540 km W of Indianola, California · 14471 days ago · 19 km deep · 66 km away
  28. 1.616 km WSW of Leggett, California · 14471 days ago · -1 km deep · 96 km away
  29. 1.911 km ENE of Hydesville, California · 14471 days ago · 22 km deep · 11 km away
  30. 1.8near the coast of Northern California · 14471 days ago · 21 km deep · 57 km away
  31. 2.641 km SW of Ferndale, California · 14468 days ago · 28 km deep · 70 km away
  32. 2.729 km WSW of Ferndale, California · 14468 days ago · 23 km deep · 59 km away
  33. 2.410 km W of Scotia, California · 14467 days ago · 4 km deep · 34 km away

Before

  1. 2.543 km SW of Ferndale, California · 14520 days ago · 4 km deep · 72 km away
  2. 1.91 km NE of Indianola, California · 14520 days ago · 7 km deep · 25 km away
  3. 2.23 km ENE of Indianola, California · 14521 days ago · 6 km deep · 23 km away
  4. 2.814 km WSW of Redcrest, California · 14521 days ago · 30 km deep · 39 km away
  5. 3.725 km SSW of Ferndale, California · 14521 days ago · 19 km deep · 52 km away
  6. 1.726 km SW of Scotia, California · 14521 days ago · 3 km deep · 50 km away
  7. 3.025 km SSW of Ferndale, California · 14521 days ago · 19 km deep · 52 km away
  8. 2.925 km SSW of Ferndale, California · 14523 days ago · 17 km deep · 52 km away
  9. 2.019 km SSW of Ferndale, California · 14524 days ago · 6 km deep · 47 km away
  10. 1.725 km SW of Scotia, California · 14525 days ago · 4 km deep · 50 km away
  11. 3.126 km SSW of Ferndale, California · 14525 days ago · 16 km deep · 52 km away
  12. 3.028 km SSW of Ferndale, California · 14527 days ago · 18 km deep · 55 km away
  13. 1.81 km WNW of Ferndale, California · 14527 days ago · 4 km deep · 31 km away
  14. 2.026 km SW of Scotia, California · 14528 days ago · 5 km deep · 52 km away
  15. 2.141 km SW of Ferndale, California · 14528 days ago · 13 km deep · 68 km away
  16. 1.711 km NW of Ferndale, California · 14530 days ago · 0 km deep · 37 km away
  17. 2.312 km SW of Scotia, California · 14530 days ago · 13 km deep · 38 km away
  18. 2.122 km W of Leggett, California · 14533 days ago · 1 km deep · 93 km away
  19. 2.331 km SW of Ferndale, California · 14534 days ago · 17 km deep · 60 km away
  20. 1.97 km NNE of Mad River, California · 14535 days ago · 8 km deep · 42 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc10084507. Read Tue, Sep 22, 2026, 9:30 PM UTC.