California earthquakes

M2.7 earthquake 12 km E of Hayfork, California

A magnitude 2.7 earthquake struck 12 km E of Hayfork, California on Thu, Oct 12, 1978, 10:24 AM PDT (17:24 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M2.8 5 km E of Redcrest, California. This one was a foreshock.

Hayfork forecastMore in California

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
2.7 (md), micro
Local time
UTC
1978-10-12 17:24:36 UTC
Depth
4.0 km (2.5 mi), shallow
Epicenter
40.541° N, 123.034° 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 2.8 km horizontally, 2.3 km in depth
Depth from
From location
Station coverage gap
288°, 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: 36 in the 60 days after this one and 19 in the 30 days before it.

After

  1. 1.6Northern California · 17511 days ago · 32 km deep · 33 km away
  2. 1.515 km WSW of Burnt Ranch, California · 17510 days ago · 33 km deep · 56 km away
  3. 2.19 km NNE of Redcrest, California · 17510 days ago · 22 km deep · 75 km away
  4. 2.112 km S of Ruth, California · 17504 days ago · 2 km deep · 50 km away
  5. 2.85 km E of Redcrest, California · 17503 days ago · 21 km deep · 74 km away
  6. 1.6Northern California · 17503 days ago · 17 km deep · 76 km away
  7. 1.99 km NE of Mad River, California · 17495 days ago · 38 km deep · 33 km away
  8. 2.215 km S of Hayfork, California · 17489 days ago · 21 km deep · 19 km away
  9. 1.78 km NE of Trinity Village, California · 17489 days ago · 22 km deep · 56 km away
  10. 2.04 km N of Redcrest, California · 17489 days ago · 21 km deep · 78 km away
  11. 1.54 km WSW of Weott, California · 17486 days ago · 25 km deep · 83 km away
  12. 1.79 km S of Burnt Ranch, California · 17486 days ago · 20 km deep · 41 km away
  13. 1.99 km SW of Scotia, California · 17486 days ago · 23 km deep · 97 km away
  14. 1.78 km W of Rio Dell, California · 17485 days ago · 20 km deep · 99 km away
  15. 1.817 km NNE of Willow Creek, California · 17481 days ago · 21 km deep · 75 km away
  16. 1.65 km SW of Scotia, California · 17480 days ago · 26 km deep · 95 km away
  17. 1.813 km NE of Phillipsville, California · 17480 days ago · 25 km deep · 61 km away
  18. 1.58 km NW of Mad River, California · 17479 days ago · 27 km deep · 46 km away
  19. 3.011 km SSW of Scotia, California · 17478 days ago · 26 km deep · 94 km away
  20. 1.72 km SSE of Trinity Village, California · 17477 days ago · 22 km deep · 54 km away
  21. 1.76 km SW of Mad River, California · 17475 days ago · 22 km deep · 47 km away
  22. 2.03 km SSW of Benbow, California · 17471 days ago · 0 km deep · 86 km away
  23. 1.62 km NNW of Arcata, California · 17469 days ago · 21 km deep · 97 km away
  24. 2.47 km W of Rio Dell, California · 17465 days ago · 19 km deep · 99 km away
  25. 1.83 km N of Redway, California · 17465 days ago · 18 km deep · 80 km away
  26. 1.88 km ENE of Willow Creek, California · 17464 days ago · 22 km deep · 63 km away
  27. 1.62 km W of Rio Dell, California · 17463 days ago · 18 km deep · 93 km away
  28. 1.84 km ESE of Leggett, California · 17462 days ago · 3 km deep · 94 km away
  29. 1.817 km NE of Miranda, California · 17462 days ago · 24 km deep · 59 km away
  30. 1.85 km NE of Redcrest, California · 17460 days ago · 0 km deep · 74 km away
  31. 2.12 km W of Rio Dell, California · 17460 days ago · 19 km deep · 93 km away
  32. 2.611 km ESE of Hyampom, California · 17460 days ago · 22 km deep · 25 km away
  33. 2.211 km SSW of Ruth, California · 17459 days ago · 30 km deep · 50 km away
  34. 1.76 km NE of Myers Flat, California · 17457 days ago · 1 km deep · 71 km away
  35. 1.611 km NNE of Junction City, California · 17454 days ago · -1 km deep · 33 km away
  36. 2.1near the coast of Northern California · 17453 days ago · 13 km deep · 93 km away

Before

  1. 2.25 km WSW of Hyampom, California · 17512 days ago · 24 km deep · 41 km away
  2. 1.79 km N of Ruth, California · 17512 days ago · 19 km deep · 31 km away
  3. 1.913 km SSW of Willow Creek, California · 17517 days ago · 8 km deep · 66 km away
  4. 1.78 km NNW of Willow Creek, California · 17518 days ago · 4 km deep · 74 km away
  5. 2.29 km E of Hydesville, California · 17519 days ago · 21 km deep · 80 km away
  6. 1.85 km NNE of Myers Flat, California · 17523 days ago · 3 km deep · 72 km away
  7. 1.524 km ENE of Hydesville, California · 17527 days ago · 7 km deep · 68 km away
  8. 3.011 km ENE of Weott, California · 17528 days ago · 30 km deep · 68 km away
  9. 1.65 km NNE of Myers Flat, California · 17530 days ago · 2 km deep · 72 km away
  10. 1.66 km NE of Myers Flat, California · 17530 days ago · 1 km deep · 71 km away
  11. 2.06 km NNE of Myers Flat, California · 17530 days ago · 3 km deep · 72 km away
  12. 2.36 km NNE of Myers Flat, California · 17530 days ago · 5 km deep · 72 km away
  13. 1.913 km WSW of Burnt Ranch, California · 17532 days ago · 31 km deep · 56 km away
  14. 2.015 km WSW of Burnt Ranch, California · 17533 days ago · 31 km deep · 57 km away
  15. 3.717 km WSW of Burnt Ranch, California · 17533 days ago · 31 km deep · 58 km away
  16. 1.65 km SSW of Alderpoint, California · 17536 days ago · 9 km deep · 68 km away
  17. 1.913 km S of Ruth, California · 17539 days ago · 22 km deep · 49 km away
  18. 1.67 km ESE of Hydesville, California · 17542 days ago · 19 km deep · 83 km away
  19. 1.86 km ENE of Garberville, California · 17542 days ago · 18 km deep · 75 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1042788. Read Tue, Sep 22, 2026, 9:31 PM UTC.