California earthquakes

M2.0 earthquake 7 km E of Hayfork, California

A magnitude 2.0 earthquake struck 7 km E of Hayfork, California on Sun, May 21, 1978, 1:09 AM PDT (08:09 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M2.9 22 km NNW of Shelter Cove, 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
2.0 (md), micro
Local time
UTC
1978-05-21 08:09:39 UTC
Depth
21.1 km (13.1 mi), shallow
Epicenter
40.542° N, 123.100° 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 5.9 km horizontally, 12.5 km in depth
Depth from
From location
Station coverage gap
311°, 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: 41 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 2.922 km NNW of Shelter Cove, California · 17657 days ago · 0 km deep · 98 km away
  2. 2.5near the coast of Northern California · 17656 days ago · 20 km deep · 100 km away
  3. 1.921 km WSW of Weott, California · 17655 days ago · 4 km deep · 95 km away
  4. 1.619 km NW of Mad River, California · 17652 days ago · 28 km deep · 50 km away
  5. 1.58 km W of Rio Dell, California · 17644 days ago · 19 km deep · 94 km away
  6. 1.60 km WSW of Ferndale, California · 17643 days ago · 21 km deep · 99 km away
  7. 1.710 km E of Hayfork, California · 17641 days ago · 25 km deep · 3 km away
  8. 1.96 km SW of Scotia, California · 17641 days ago · 27 km deep · 89 km away
  9. 1.81 km WSW of Ferndale, California · 17641 days ago · 12 km deep · 100 km away
  10. 1.86 km W of Scotia, California · 17640 days ago · 22 km deep · 92 km away
  11. 1.78 km NE of Hydesville, California · 17640 days ago · 23 km deep · 79 km away
  12. 1.715 km NNE of Redcrest, California · 17637 days ago · 21 km deep · 64 km away
  13. 1.615 km SE of Indianola, California · 17634 days ago · 21 km deep · 75 km away
  14. 1.611 km WSW of Scotia, California · 17634 days ago · 19 km deep · 96 km away
  15. 1.63 km W of Miranda, California · 17631 days ago · 16 km deep · 73 km away
  16. 1.88 km W of Weott, California · 17630 days ago · 23 km deep · 82 km away
  17. 3.38 km W of Rio Dell, California · 17629 days ago · 20 km deep · 94 km away
  18. 1.710 km SSW of Scotia, California · 17625 days ago · 36 km deep · 89 km away
  19. 1.9Northern California · 17623 days ago · 17 km deep · 73 km away
  20. 3.24 km N of Redway, California · 17623 days ago · 19 km deep · 75 km away
  21. 1.614 km ENE of Weott, California · 17623 days ago · 21 km deep · 59 km away
  22. 1.67 km WSW of Rio Dell, California · 17621 days ago · 28 km deep · 93 km away
  23. 1.67 km W of Rio Dell, California · 17620 days ago · 19 km deep · 93 km away
  24. 2.221 km WNW of Hyampom, California · 17618 days ago · 25 km deep · 52 km away
  25. 3.39 km S of Ferndale, California · 17616 days ago · 19 km deep · 100 km away
  26. 2.319 km SSE of Ruth, California · 17613 days ago · 5 km deep · 50 km away
  27. 2.56 km SSW of Scotia, California · 17612 days ago · 25 km deep · 87 km away
  28. 1.811 km NW of Hayfork, California · 17610 days ago · 4 km deep · 18 km away
  29. 2.43 km SSE of Fieldbrook, California · 17605 days ago · 28 km deep · 89 km away
  30. 3.37 km NW of Ruth, California · 17604 days ago · 30 km deep · 36 km away
  31. 1.55 km WNW of Weott, California · 17604 days ago · 4 km deep · 78 km away
  32. 1.76 km NW of Ruth, California · 17604 days ago · 20 km deep · 34 km away
  33. 1.67 km NW of Ruth, California · 17604 days ago · 23 km deep · 36 km away
  34. 2.412 km NNE of Redcrest, CA · 17603 days ago · 22 km deep · 69 km away
  35. 1.920 km ENE of Westhaven-Moonstone, California · 17601 days ago · 22 km deep · 91 km away
  36. 2.39 km WSW of Scotia, California · 17600 days ago · 3 km deep · 94 km away
  37. 2.99 km WSW of Scotia, California · 17599 days ago · 3 km deep · 94 km away
  38. 1.99 km W of Scotia, California · 17599 days ago · 2 km deep · 94 km away
  39. 3.010 km S of Ferndale, California · 17599 days ago · 19 km deep · 100 km away
  40. 2.99 km WSW of Scotia, California · 17599 days ago · 7 km deep · 95 km away
  41. 1.818 km SW of Scotia, California · 17599 days ago · 31 km deep · 99 km away

Before

  1. 1.92 km NNE of Hayfork, California · 17657 days ago · 14 km deep · 7 km away
  2. 3.023 km SSE of Douglas City, California · 17658 days ago · 4 km deep · 26 km away
  3. 2.34 km NNW of Redway, California · 17660 days ago · 21 km deep · 76 km away
  4. 1.92 km SW of Miranda, California · 17661 days ago · 13 km deep · 73 km away
  5. 1.52 km W of Benbow, California · 17664 days ago · 16 km deep · 80 km away
  6. 3.024 km WNW of Elk Creek, California · 17667 days ago · 11 km deep · 98 km away
  7. 3.323 km WNW of Elk Creek, California · 17667 days ago · 4 km deep · 96 km away
  8. 1.611 km S of Ferndale, California · 17669 days ago · 2 km deep · 97 km away
  9. 1.710 km WSW of Rio Dell, California · 17671 days ago · 5 km deep · 95 km away
  10. 1.713 km ENE of Hydesville, California · 17684 days ago · 20 km deep · 72 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1040356. Read Tue, Sep 22, 2026, 9:18 PM UTC.