California earthquakes

M3.3 earthquake 13 km ESE of Ruth, California

A magnitude 3.3 earthquake struck 13 km ESE of Ruth, California on Tue, Mar 21, 1978, 10:34 PM PST (06:34 UTC), 41 km (26 mi) below the surface.

A larger quake followed: M3.6 9 km WSW of Scotia, California. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
3.3 (md), minor
Local time
UTC
1978-03-22 06:34:20 UTC
Depth
41.1 km (25.5 mi), shallow
Epicenter
40.220° N, 123.176° 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 9.0 km horizontally, 4.5 km in depth
Depth from
From location
Station coverage gap
314°, poorly surrounded by stations
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 66 in the 60 days after this one and 44 in the 30 days before it.

After

  1. 2.69 km WSW of Rio Dell, California · 17716 days ago · 5 km deep · 93 km away
  2. 2.613 km ESE of Ruth, California · 17716 days ago · 44 km deep · 2 km away
  3. 3.238 km ESE of Ruth, California · 17716 days ago · 23 km deep · 25 km away
  4. 3.116 km ESE of Ruth, California · 17716 days ago · 48 km deep · 3 km away
  5. 2.317 km SW of Scotia, California · 17716 days ago · 26 km deep · 91 km away
  6. 1.610 km WSW of Rio Dell, California · 17716 days ago · 4 km deep · 94 km away
  7. 1.816 km ESE of Ruth, California · 17716 days ago · 45 km deep · 3 km away
  8. 3.014 km ESE of Ruth, California · 17716 days ago · 44 km deep · 1 km away
  9. 2.18 km ENE of Trinity Village, California · 17715 days ago · 21 km deep · 78 km away
  10. 1.614 km ESE of Indianola, California · 17714 days ago · 25 km deep · 87 km away
  11. 1.95 km NNE of Brooktrails, California · 17712 days ago · 1 km deep · 83 km away
  12. 2.615 km NE of Hydesville, California · 17711 days ago · 24 km deep · 81 km away
  13. 3.69 km WSW of Scotia, California · 17711 days ago · 5 km deep · 91 km away
  14. 1.99 km W of Scotia, California · 17711 days ago · 9 km deep · 92 km away
  15. 1.69 km WSW of Rio Dell, California · 17711 days ago · 2 km deep · 92 km away
  16. 1.89 km WSW of Rio Dell, California · 17711 days ago · 4 km deep · 93 km away
  17. 2.710 km WSW of Rio Dell, California · 17711 days ago · 6 km deep · 93 km away
  18. 1.86 km ENE of Blue Lake, California · 17710 days ago · 27 km deep · 98 km away
  19. 2.710 km WSW of Scotia, California · 17708 days ago · 8 km deep · 93 km away
  20. 1.710 km W of Scotia, California · 17708 days ago · 7 km deep · 93 km away
  21. 2.5near the coast of Northern California · 17706 days ago · 16 km deep · 77 km away
  22. 1.9near the coast of Northern California · 17706 days ago · 26 km deep · 91 km away
  23. 2.710 km S of Ferndale, California · 17702 days ago · 12 km deep · 96 km away
  24. 1.97 km SSW of Scotia, California · 17702 days ago · 23 km deep · 85 km away
  25. 2.18 km WSW of Scotia, California · 17701 days ago · 2 km deep · 91 km away
  26. 1.610 km W of Scotia, California · 17697 days ago · 4 km deep · 93 km away
  27. 1.811 km W of Hyampom, California · 17695 days ago · 33 km deep · 57 km away
  28. 2.113 km NE of Phillipsville, California · 17695 days ago · 22 km deep · 44 km away
  29. 3.418 km SSW of Scotia, California · 17695 days ago · 22 km deep · 89 km away
  30. 1.61 km N of Rio Dell, California · 17692 days ago · 3 km deep · 86 km away
  31. 1.710 km WSW of Rio Dell, California · 17691 days ago · 5 km deep · 93 km away
  32. 1.910 km WSW of Rio Dell, California · 17691 days ago · 4 km deep · 93 km away
  33. 2.38 km NW of Redwood Valley, California · 17690 days ago · 6 km deep · 100 km away
  34. 1.711 km W of Scotia, California · 17690 days ago · 7 km deep · 93 km away
  35. 1.67 km SSE of Ferndale, California · 17690 days ago · 24 km deep · 96 km away
  36. 2.36 km SSE of Willits, California · 17690 days ago · 3 km deep · 97 km away
  37. 2.36 km SSE of Willits, California · 17689 days ago · 5 km deep · 97 km away
  38. 3.219 km WNW of Elk Creek, California · 17689 days ago · 7 km deep · 70 km away
  39. 1.623 km SW of Scotia, California · 17689 days ago · 15 km deep · 99 km away
  40. 3.226 km WNW of Elk Creek, California · 17689 days ago · 18 km deep · 68 km away
  41. 3.023 km WNW of Elk Creek, California · 17689 days ago · 2 km deep · 67 km away
  42. 3.421 km WNW of Elk Creek, California · 17688 days ago · 10 km deep · 69 km away
  43. 3.221 km WNW of Elk Creek, California · 17688 days ago · 6 km deep · 68 km away
  44. 1.713 km ENE of Hydesville, California · 17683 days ago · 20 km deep · 77 km away
  45. 2.914 km NW of Elk Creek, California · 17682 days ago · 5 km deep · 73 km away
  46. 1.515 km SSW of Ferndale, California · 17681 days ago · 22 km deep · 99 km away
  47. 3.110 km SSW of Ferndale, California · 17681 days ago · 19 km deep · 99 km away
  48. 1.710 km S of Ferndale, California · 17681 days ago · 19 km deep · 98 km away
  49. 2.08 km NE of Willits, California · 17680 days ago · 9 km deep · 85 km away
  50. 1.710 km S of Ferndale, California · 17680 days ago · 18 km deep · 98 km away
  51. 2.710 km S of Ferndale, California · 17680 days ago · 19 km deep · 99 km away
  52. 2.824 km WNW of Elk Creek, California · 17679 days ago · 4 km deep · 69 km away
  53. 2.125 km NE of Potter Valley, California · 17675 days ago · 14 km deep · 85 km away
  54. 2.416 km W of Elk Creek, California · 17673 days ago · 4 km deep · 79 km away
  55. 1.710 km WSW of Rio Dell, California · 17670 days ago · 5 km deep · 93 km away
  56. 2.524 km ENE of Potter Valley, California · 17669 days ago · 0 km deep · 91 km away
  57. 1.611 km S of Ferndale, California · 17668 days ago · 2 km deep · 95 km away
  58. 3.323 km WNW of Elk Creek, California · 17666 days ago · 4 km deep · 66 km away
  59. 3.024 km WNW of Elk Creek, California · 17666 days ago · 11 km deep · 67 km away
  60. 1.52 km W of Benbow, California · 17663 days ago · 16 km deep · 56 km away

The first 60 of 66.

Before

  1. 3.538 km NW of Paskenta, California · 17716 days ago · 5 km deep · 27 km away
  2. 2.09 km WSW of Rio Dell, California · 17716 days ago · 4 km deep · 92 km away
  3. 1.710 km WSW of Rio Dell, California · 17716 days ago · 3 km deep · 93 km away
  4. 1.69 km WSW of Rio Dell, California · 17716 days ago · 3 km deep · 93 km away
  5. 2.110 km WSW of Rio Dell, California · 17716 days ago · 6 km deep · 93 km away
  6. 1.510 km WSW of Rio Dell, California · 17716 days ago · 4 km deep · 93 km away
  7. 3.19 km W of Scotia, California · 17717 days ago · 5 km deep · 92 km away
  8. 2.09 km WSW of Scotia, California · 17717 days ago · 4 km deep · 92 km away
  9. 1.610 km WSW of Rio Dell, California · 17717 days ago · 3 km deep · 93 km away
  10. 2.09 km WSW of Rio Dell, California · 17717 days ago · 5 km deep · 92 km away
  11. 1.910 km WSW of Rio Dell, California · 17717 days ago · 5 km deep · 93 km away
  12. 1.79 km WSW of Rio Dell, California · 17717 days ago · 2 km deep · 92 km away
  13. 1.79 km WSW of Rio Dell, California · 17717 days ago · 3 km deep · 92 km away
  14. 3.79 km WSW of Rio Dell, California · 17717 days ago · 5 km deep · 92 km away
  15. 1.610 km WSW of Rio Dell, California · 17717 days ago · 3 km deep · 93 km away
  16. 1.611 km WSW of Scotia, California · 17717 days ago · 8 km deep · 93 km away
  17. 1.99 km WSW of Rio Dell, California · 17717 days ago · 3 km deep · 92 km away
  18. 2.19 km WSW of Rio Dell, California · 17717 days ago · 2 km deep · 92 km away
  19. 1.827 km SW of Scotia, California · 17717 days ago · 7 km deep · 99 km away
  20. 1.72 km SW of Garberville, California · 17718 days ago · 15 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1039408. Read Tue, Sep 22, 2026, 11:20 AM UTC.