California earthquakes

M1.9 earthquake 2 km NNE of Hayfork, California

A magnitude 1.9 earthquake struck 2 km NNE of Hayfork, California on Sat, May 20, 1978, 3:37 AM PDT (10:37 UTC), 14 km (8 mi) below the surface.

A larger quake followed: M2.0 7 km E of Hayfork, 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.

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The earthquake

Magnitude
1.9 (md), micro
Local time
UTC
1978-05-20 10:37:25 UTC
Depth
13.6 km (8.4 mi), shallow
Epicenter
40.577° N, 123.170° 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 1.5 km horizontally, 1.1 km in depth
Depth from
From location
Station coverage gap
305°, poorly surrounded by stations
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 57 in the 60 days after this one and 13 in the 30 days before it.

After

  1. 2.07 km E of Hayfork, California · 17657 days ago · 21 km deep · 7 km away
  2. 2.922 km NNW of Shelter Cove, California · 17656 days ago · 0 km deep · 94 km away
  3. 2.5near the coast of Northern California · 17656 days ago · 20 km deep · 94 km away
  4. 1.921 km WSW of Weott, California · 17655 days ago · 4 km deep · 91 km away
  5. 1.619 km NW of Mad River, California · 17652 days ago · 28 km deep · 44 km away
  6. 1.58 km W of Rio Dell, California · 17644 days ago · 19 km deep · 88 km away
  7. 1.60 km WSW of Ferndale, California · 17643 days ago · 21 km deep · 93 km away
  8. 1.617 km SW of Scotia, California · 17642 days ago · 22 km deep · 95 km away
  9. 1.710 km E of Hayfork, California · 17641 days ago · 25 km deep · 10 km away
  10. 1.96 km SW of Scotia, California · 17641 days ago · 27 km deep · 84 km away
  11. 1.81 km WSW of Ferndale, California · 17641 days ago · 12 km deep · 94 km away
  12. 1.86 km W of Scotia, California · 17640 days ago · 22 km deep · 86 km away
  13. 1.78 km NE of Hydesville, California · 17640 days ago · 23 km deep · 73 km away
  14. 1.59 km SSW of Ferndale, California · 17640 days ago · 20 km deep · 97 km away
  15. 2.66 km W of Loleta, California · 17637 days ago · 24 km deep · 96 km away
  16. 2.617 km SSW of Ferndale, California · 17637 days ago · 22 km deep · 99 km away
  17. 1.715 km NNE of Redcrest, California · 17637 days ago · 21 km deep · 58 km away
  18. 1.615 km SE of Indianola, California · 17634 days ago · 21 km deep · 68 km away
  19. 1.611 km WSW of Scotia, California · 17634 days ago · 19 km deep · 91 km away
  20. 1.63 km W of Miranda, California · 17631 days ago · 16 km deep · 70 km away
  21. 1.88 km W of Weott, California · 17630 days ago · 23 km deep · 78 km away
  22. 3.38 km W of Rio Dell, California · 17629 days ago · 20 km deep · 88 km away
  23. 1.611 km SSW of Ferndale, California · 17628 days ago · 20 km deep · 97 km away
  24. 1.915 km SSW of Ferndale, California · 17625 days ago · 21 km deep · 97 km away
  25. 1.710 km SSW of Scotia, California · 17625 days ago · 36 km deep · 84 km away
  26. 2.217 km SSW of Ferndale, California · 17624 days ago · 18 km deep · 98 km away
  27. 1.9Northern California · 17623 days ago · 17 km deep · 71 km away
  28. 3.24 km N of Redway, California · 17623 days ago · 19 km deep · 73 km away
  29. 1.614 km ENE of Weott, California · 17623 days ago · 21 km deep · 55 km away
  30. 1.96 km WNW of McKinleyville, California · 17621 days ago · 4 km deep · 95 km away
  31. 1.67 km WSW of Rio Dell, California · 17621 days ago · 28 km deep · 87 km away
  32. 2.116 km WSW of Scotia, California · 17620 days ago · 20 km deep · 96 km away
  33. 1.67 km W of Rio Dell, California · 17620 days ago · 19 km deep · 87 km away
  34. 1.517 km S of Ferndale, California · 17618 days ago · 20 km deep · 96 km away
  35. 2.221 km WNW of Hyampom, California · 17618 days ago · 25 km deep · 45 km away
  36. 2.010 km SW of Trinidad, California · 17618 days ago · 23 km deep · 100 km away
  37. 3.39 km S of Ferndale, California · 17616 days ago · 19 km deep · 94 km away
  38. 1.710 km WNW of Manila, California · 17613 days ago · 20 km deep · 100 km away
  39. 1.725 km SSW of Scotia, California · 17613 days ago · -1 km deep · 97 km away
  40. 2.319 km SSE of Ruth, California · 17613 days ago · 5 km deep · 53 km away
  41. 2.56 km SSW of Scotia, California · 17612 days ago · 25 km deep · 82 km away
  42. 1.97 km WNW of Ferndale, California · 17611 days ago · 19 km deep · 99 km away
  43. 1.811 km NW of Hayfork, California · 17610 days ago · 4 km deep · 11 km away
  44. 2.43 km SSE of Fieldbrook, California · 17605 days ago · 28 km deep · 82 km away
  45. 3.37 km NW of Ruth, California · 17604 days ago · 30 km deep · 35 km away
  46. 1.55 km WNW of Weott, California · 17604 days ago · 4 km deep · 73 km away
  47. 1.76 km NW of Ruth, California · 17604 days ago · 20 km deep · 34 km away
  48. 1.67 km NW of Ruth, California · 17604 days ago · 23 km deep · 35 km away
  49. 2.412 km NNE of Redcrest, CA · 17603 days ago · 22 km deep · 63 km away
  50. 1.920 km ENE of Westhaven-Moonstone, California · 17601 days ago · 22 km deep · 84 km away
  51. 1.610 km S of Ferndale, California · 17600 days ago · 18 km deep · 94 km away
  52. 2.39 km WSW of Scotia, California · 17600 days ago · 3 km deep · 88 km away
  53. 2.99 km WSW of Scotia, California · 17599 days ago · 3 km deep · 89 km away
  54. 1.99 km W of Scotia, California · 17599 days ago · 2 km deep · 89 km away
  55. 3.010 km S of Ferndale, California · 17599 days ago · 19 km deep · 94 km away
  56. 2.99 km WSW of Scotia, California · 17599 days ago · 7 km deep · 89 km away
  57. 1.818 km SW of Scotia, California · 17599 days ago · 31 km deep · 94 km away

Before

  1. 3.023 km SSE of Douglas City, California · 17658 days ago · 4 km deep · 33 km away
  2. 1.51 km NNE of Trinidad, California · 17658 days ago · 17 km deep · 98 km away
  3. 2.34 km NNW of Redway, California · 17660 days ago · 21 km deep · 74 km away
  4. 1.92 km SW of Miranda, California · 17660 days ago · 13 km deep · 70 km away
  5. 1.52 km W of Benbow, California · 17664 days ago · 16 km deep · 78 km away
  6. 1.611 km S of Ferndale, California · 17669 days ago · 2 km deep · 91 km away
  7. 1.710 km WSW of Rio Dell, California · 17671 days ago · 5 km deep · 90 km away
  8. 2.710 km S of Ferndale, California · 17680 days ago · 19 km deep · 95 km away
  9. 1.710 km S of Ferndale, California · 17681 days ago · 18 km deep · 95 km away
  10. 1.710 km S of Ferndale, California · 17681 days ago · 19 km deep · 95 km away
  11. 3.110 km SSW of Ferndale, California · 17681 days ago · 19 km deep · 95 km away
  12. 1.515 km SSW of Ferndale, California · 17681 days ago · 22 km deep · 97 km away
  13. 1.713 km ENE of Hydesville, California · 17684 days ago · 20 km deep · 66 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1040338. Read Tue, Sep 22, 2026, 8:26 PM UTC.