California earthquakes

M4.0 earthquake 38 km SW of Ferndale, California

A magnitude 4.0 earthquake struck 38 km SW of Ferndale, California on Mon, Mar 30, 1981, 6:10 PM PST (02:10 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M4.6 58 km WSW of Ferndale, California. This one was a foreshock.

Ferndale 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
4.0 (ml), light
Local time
UTC
1981-03-31 02:10:37 UTC
Depth
22.0 km (13.7 mi), shallow
Epicenter
40.338° N, 124.593° 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, 1.9 km in depth
Depth from
From location
Station coverage gap
237°, poorly surrounded by stations
Stations used
36

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 179 in the 60 days after this one and 68 in the 30 days before it.

After

  1. 2.840 km SW of Ferndale, California · 16619 days ago · 23 km deep · 2 km away
  2. 2.439 km SW of Ferndale, California · 16619 days ago · 27 km deep · 2 km away
  3. 2.937 km SW of Ferndale, California · 16619 days ago · 27 km deep · 1 km away
  4. 1.67 km NE of Myers Flat, California · 16619 days ago · 48 km deep · 66 km away
  5. 3.041 km SW of Ferndale, California · 16619 days ago · 23 km deep · 3 km away
  6. 2.139 km SW of Ferndale, California · 16618 days ago · 23 km deep · 2 km away
  7. 2.044 km SW of Ferndale, California · 16618 days ago · 18 km deep · 7 km away
  8. 1.819 km SW of Ferndale, California · 16617 days ago · 18 km deep · 19 km away
  9. 1.821 km SSW of Ferndale, California · 16617 days ago · 21 km deep · 19 km away
  10. 1.520 km SW of Ferndale, California · 16617 days ago · 17 km deep · 18 km away
  11. 2.014 km WNW of Mad River, California · 16617 days ago · 22 km deep · 79 km away
  12. 1.648 km WNW of Indianola, California · 16617 days ago · 3 km deep · 53 km away
  13. 2.418 km WNW of Manila, California · 16617 days ago · 17 km deep · 69 km away
  14. 3.237 km SW of Ferndale, California · 16616 days ago · 22 km deep · 6 km away
  15. 3.267 km W of Trinidad, California · 16616 days ago · 5 km deep · 95 km away
  16. 2.790 km W of Ferndale, California · 16616 days ago · 5 km deep · 63 km away
  17. 1.818 km W of Ferndale, California · 16615 days ago · 22 km deep · 27 km away
  18. 1.517 km NE of Redcrest, California · 16614 days ago · 26 km deep · 69 km away
  19. 1.812 km NE of Myers Flat, California · 16614 days ago · -1 km deep · 69 km away
  20. 1.529 km SW of Scotia, California · 16614 days ago · 19 km deep · 24 km away
  21. 2.035 km SW of Ferndale, California · 16613 days ago · 35 km deep · 4 km away
  22. 2.537 km SSW of Ferndale, California · 16612 days ago · 14 km deep · 11 km away
  23. 2.420 km SSW of Scotia, California · 16612 days ago · 11 km deep · 30 km away
  24. 1.8off the coast of Northern California · 16611 days ago · 4 km deep · 44 km away
  25. 2.338 km SW of Ferndale, California · 16610 days ago · 25 km deep · 1 km away
  26. 1.928 km SSW of Ferndale, California · 16610 days ago · 18 km deep · 13 km away
  27. 3.038 km W of Trinidad, California · 16610 days ago · 22 km deep · 83 km away
  28. 1.936 km SW of Ferndale, California · 16610 days ago · 17 km deep · 2 km away
  29. 1.826 km SSW of Ferndale, California · 16609 days ago · 33 km deep · 14 km away
  30. 2.434 km SW of Ferndale, California · 16609 days ago · 37 km deep · 5 km away
  31. 2.142 km W of Big Lagoon, California · 16609 days ago · 5 km deep · 95 km away
  32. 2.0108 km W of Ferndale, California · 16608 days ago · 5 km deep · 90 km away
  33. 2.424 km SW of Scotia, California · 16608 days ago · 30 km deep · 23 km away
  34. 1.810 km W of Indianola, California · 16608 days ago · 8 km deep · 43 km away
  35. 2.446 km SW of Ferndale, California · 16608 days ago · 16 km deep · 9 km away
  36. 1.712 km NE of Myers Flat, California · 16608 days ago · 0 km deep · 69 km away
  37. 1.951 km SW of Ferndale, California · 16607 days ago · 15 km deep · 14 km away
  38. 1.626 km NW of Shelter Cove, California · 16607 days ago · 4 km deep · 31 km away
  39. 1.738 km SW of Ferndale, California · 16607 days ago · 16 km deep · 5 km away
  40. 1.74 km NNE of Redway, California · 16607 days ago · 4 km deep · 70 km away
  41. 1.821 km WSW of Burnt Ranch, California · 16607 days ago · 23 km deep · 86 km away
  42. 1.827 km W of Trinidad, California · 16606 days ago · 25 km deep · 77 km away
  43. 1.738 km SW of Ferndale, California · 16606 days ago · 24 km deep · 3 km away
  44. 2.140 km SW of Ferndale, California · 16606 days ago · 24 km deep · 3 km away
  45. 4.336 km SW of Ferndale, California · 16605 days ago · 23 km deep · 4 km away
  46. 1.7near the coast of Northern California · 16605 days ago · 24 km deep · 4 km away
  47. 3.137 km SW of Ferndale, California · 16605 days ago · 27 km deep · 4 km away
  48. 2.365 km W of Indianola, California · 16605 days ago · 20 km deep · 59 km away
  49. 2.236 km SW of Ferndale, California · 16605 days ago · 27 km deep · 5 km away
  50. 1.73 km NNE of Alderpoint, California · 16604 days ago · 33 km deep · 85 km away
  51. 1.527 km SSW of Ferndale, California · 16604 days ago · 16 km deep · 13 km away
  52. 2.038 km SW of Ferndale, California · 16604 days ago · 21 km deep · 3 km away
  53. 1.837 km SW of Ferndale, California · 16604 days ago · 21 km deep · 1 km away
  54. 1.511 km W of Mad River, California · 16604 days ago · 0 km deep · 81 km away
  55. 2.341 km SW of Ferndale, California · 16604 days ago · 24 km deep · 4 km away
  56. 1.937 km SW of Ferndale, California · 16604 days ago · 25 km deep · 4 km away
  57. 2.942 km W of Trinidad, California · 16603 days ago · 16 km deep · 76 km away
  58. 4.2126 km W of Ferndale, California · 16602 days ago · 5 km deep · 97 km away
  59. 2.836 km SW of Ferndale, California · 16602 days ago · 26 km deep · 5 km away
  60. 1.534 km SW of Scotia, California · 16601 days ago · 12 km deep · 20 km away

The first 60 of 179.

Before

  1. 1.537 km SW of Ferndale, California · 16619 days ago · 23 km deep · 2 km away
  2. 2.438 km SW of Ferndale, California · 16620 days ago · 20 km deep · 1 km away
  3. 2.343 km SW of Ferndale, California · 16620 days ago · 19 km deep · 6 km away
  4. 3.131 km SW of Ferndale, California · 16620 days ago · 27 km deep · 8 km away
  5. 2.428 km SW of Ferndale, California · 16620 days ago · 29 km deep · 10 km away
  6. 2.937 km SW of Ferndale, California · 16620 days ago · 24 km deep · 2 km away
  7. 2.040 km SW of Ferndale, California · 16620 days ago · 26 km deep · 2 km away
  8. 1.839 km SW of Ferndale, California · 16620 days ago · 23 km deep · 1 km away
  9. 4.338 km SW of Ferndale, California · 16620 days ago · 25 km deep · 1 km away
  10. 2.014 km NE of Myers Flat, California · 16620 days ago · -1 km deep · 72 km away
  11. 3.014 km ENE of Weott, California · 16620 days ago · 2 km deep · 70 km away
  12. 1.810 km NE of Redcrest, California · 16621 days ago · 22 km deep · 63 km away
  13. 1.69 km SW of Scotia, California · 16622 days ago · 20 km deep · 36 km away
  14. 2.142 km SW of Ferndale, California · 16622 days ago · 17 km deep · 4 km away
  15. 2.454 km WNW of Indianola, California · 16623 days ago · 15 km deep · 56 km away
  16. 2.694 km W of Ferndale, California · 16623 days ago · 5 km deep · 65 km away
  17. 1.926 km SSW of Ferndale, California · 16624 days ago · 17 km deep · 15 km away
  18. 1.93 km E of Mad River, California · 16624 days ago · -1 km deep · 96 km away
  19. 3.139 km SW of Ferndale, California · 16624 days ago · 21 km deep · 2 km away
  20. 1.637 km SW of Ferndale, California · 16625 days ago · 21 km deep · 2 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1061902 (also filed as usp0001cyg). Read Wed, Sep 30, 2026, 6:45 AM UTC.