California earthquakes

M1.5 earthquake 12 km WNW of Mad River, California

A magnitude 1.5 earthquake struck 12 km WNW of Mad River, California on Mon, Mar 28, 1983, 12:00 PM PST (20:00 UTC), 25 km (15 mi) below the surface.

A larger quake followed: M4.0 40 km WSW of Ferndale, 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
1.5 (md), micro
Local time
UTC
1983-03-28 20:00:39 UTC
Depth
24.9 km (15.5 mi), shallow
Epicenter
40.480° N, 123.652° 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 0.8 km horizontally, 1.0 km in depth
Depth from
From location
Station coverage gap
193°, poorly surrounded by stations
Stations used
6

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 85 in the 60 days after this one and 41 in the 30 days before it.

After

  1. 2.50 km NNE of Fieldbrook, California · 15888 days ago · 21 km deep · 63 km away
  2. 2.035 km SSW of Ferndale, California · 15888 days ago · 21 km deep · 74 km away
  3. 1.841 km SSW of Ferndale, California · 15887 days ago · 17 km deep · 78 km away
  4. 2.025 km SSW of Ferndale, California · 15887 days ago · 17 km deep · 62 km away
  5. 2.121 km SW of Scotia, California · 15887 days ago · 19 km deep · 56 km away
  6. 1.821 km SSW of Ferndale, California · 15885 days ago · 20 km deep · 61 km away
  7. 3.126 km W of Paskenta, California · 15884 days ago · -1 km deep · 91 km away
  8. 2.326 km SW of Ferndale, California · 15882 days ago · 27 km deep · 67 km away
  9. 2.811 km SE of Laytonville, California · 15880 days ago · 8 km deep · 100 km away
  10. 1.72 km WNW of Fortuna, California · 15879 days ago · 10 km deep · 48 km away
  11. 2.135 km SW of Scotia, California · 15879 days ago · 11 km deep · 68 km away
  12. 1.513 km ESE of Orick, California · 15879 days ago · 15 km deep · 88 km away
  13. 2.326 km SSW of Ferndale, California · 15876 days ago · 14 km deep · 65 km away
  14. 1.727 km SSW of Ferndale, California · 15876 days ago · 13 km deep · 65 km away
  15. 1.510 km SE of Laytonville, California · 15875 days ago · 8 km deep · 99 km away
  16. 1.78 km ESE of Hydesville, California · 15875 days ago · 22 km deep · 30 km away
  17. 1.814 km SE of Indianola, California · 15873 days ago · 21 km deep · 37 km away
  18. 2.236 km WSW of Ferndale, California · 15873 days ago · 29 km deep · 87 km away
  19. 1.919 km WSW of Weott, California · 15872 days ago · 22 km deep · 48 km away
  20. 2.07 km SSW of Ferndale, California · 15872 days ago · 10 km deep · 55 km away
  21. 1.926 km SW of Scotia, California · 15872 days ago · 5 km deep · 59 km away
  22. 3.038 km SW of Ferndale, California · 15870 days ago · 22 km deep · 81 km away
  23. 1.724 km WSW of Weott, California · 15870 days ago · 6 km deep · 53 km away
  24. 1.66 km NE of Mad River, California · 15869 days ago · -1 km deep · 16 km away
  25. 2.314 km WNW of Ferndale, California · 15869 days ago · 21 km deep · 67 km away
  26. 1.62 km N of Indianola, California · 15868 days ago · 4 km deep · 55 km away
  27. 1.88 km W of Rio Dell, California · 15867 days ago · 20 km deep · 47 km away
  28. 3.834 km SW of Ferndale, California · 15866 days ago · 17 km deep · 74 km away
  29. 2.025 km SSW of Ferndale, California · 15866 days ago · 20 km deep · 66 km away
  30. 2.021 km SSW of Ferndale, California · 15866 days ago · 21 km deep · 61 km away
  31. 3.535 km SSW of Ferndale, California · 15866 days ago · 19 km deep · 74 km away
  32. 2.119 km SW of Ferndale, California · 15866 days ago · 22 km deep · 67 km away
  33. 1.939 km SSW of Ferndale, California · 15865 days ago · 12 km deep · 75 km away
  34. 1.619 km SSW of Ferndale, California · 15865 days ago · 22 km deep · 59 km away
  35. 2.419 km W of Ferndale, California · 15865 days ago · 23 km deep · 72 km away
  36. 1.635 km SSW of Ferndale, California · 15864 days ago · 4 km deep · 70 km away
  37. 2.118 km WNW of Hyampom, California · 15864 days ago · 29 km deep · 24 km away
  38. 1.514 km S of Ferndale, California · 15863 days ago · 24 km deep · 54 km away
  39. 1.511 km S of Ferndale, California · 15863 days ago · 6 km deep · 52 km away
  40. 4.040 km WSW of Ferndale, California · 15863 days ago · 20 km deep · 88 km away
  41. 2.115 km ESE of Indianola, California · 15862 days ago · 20 km deep · 38 km away
  42. 1.68 km SSE of Laytonville, California · 15862 days ago · 9 km deep · 98 km away
  43. 3.216 km SW of Ferndale, California · 15862 days ago · 25 km deep · 65 km away
  44. 1.620 km WSW of Weott, California · 15860 days ago · -1 km deep · 49 km away
  45. 1.534 km SSW of Ferndale, California · 15860 days ago · 5 km deep · 69 km away
  46. 1.528 km WNW of Ferndale, California · 15859 days ago · 23 km deep · 81 km away
  47. 2.09 km SSE of Laytonville, California · 15859 days ago · 8 km deep · 98 km away
  48. 2.041 km SW of Ferndale, California · 15858 days ago · 10 km deep · 80 km away
  49. 1.811 km SW of Scotia, California · 15857 days ago · 30 km deep · 45 km away
  50. 3.128 km SSW of Ferndale, California · 15857 days ago · 18 km deep · 68 km away
  51. 1.74 km SE of Leggett, California · 15856 days ago · 7 km deep · 71 km away
  52. 2.032 km WNW of Paskenta, California · 15855 days ago · 14 km deep · 86 km away
  53. 1.924 km SSW of Ferndale, California · 15855 days ago · 19 km deep · 65 km away
  54. 2.026 km SSW of Ferndale, California · 15855 days ago · 16 km deep · 62 km away
  55. 1.624 km WSW of Ferndale, California · 15855 days ago · 23 km deep · 76 km away
  56. 1.67 km WNW of Laytonville, California · 15854 days ago · 4 km deep · 87 km away
  57. 2.132 km SSW of Ferndale, California · 15851 days ago · 5 km deep · 67 km away
  58. 1.97 km W of Laytonville, California · 15850 days ago · 1 km deep · 87 km away
  59. 1.831 km SW of Ferndale, California · 15850 days ago · 25 km deep · 78 km away
  60. 1.736 km WSW of Ferndale, California · 15850 days ago · 23 km deep · 84 km away

The first 60 of 85.

Before

  1. 1.9near the coast of Northern California · 15889 days ago · 23 km deep · 66 km away
  2. 3.012 km WSW of Trinidad, California · 15890 days ago · 17 km deep · 79 km away
  3. 1.739 km SW of Ferndale, California · 15890 days ago · 8 km deep · 81 km away
  4. 2.18 km SE of Burnt Ranch, California · 15891 days ago · 39 km deep · 38 km away
  5. 1.617 km SW of Scotia, California · 15891 days ago · 19 km deep · 51 km away
  6. 1.521 km W of Ferndale, California · 15892 days ago · 16 km deep · 74 km away
  7. 2.011 km SSW of Benbow, California · 15892 days ago · 6 km deep · 58 km away
  8. 3.015 km NNW of Willow Creek, California · 15893 days ago · 30 km deep · 66 km away
  9. 2.021 km W of Samoa, California · 15894 days ago · 24 km deep · 77 km away
  10. 1.834 km SSW of Ferndale, California · 15894 days ago · 17 km deep · 70 km away
  11. 2.132 km W of Ferndale, California · 15894 days ago · 33 km deep · 85 km away
  12. 3.129 km NNW of Junction City, California · 15894 days ago · 30 km deep · 69 km away
  13. 1.93 km ENE of Covelo, California · 15894 days ago · 10 km deep · 84 km away
  14. 2.014 km W of Laytonville, California · 15895 days ago · -1 km deep · 89 km away
  15. 2.011 km NE of Ruth, California · 15895 days ago · 16 km deep · 39 km away
  16. 2.610 km ENE of Ruth, California · 15895 days ago · 36 km deep · 41 km away
  17. 1.511 km W of Hayfork, California · 15895 days ago · 4 km deep · 29 km away
  18. 1.68 km WSW of Ferndale, California · 15897 days ago · 14 km deep · 61 km away
  19. 2.428 km W of Trinidad, California · 15897 days ago · 18 km deep · 93 km away
  20. 2.12 km ENE of Garberville, California · 15898 days ago · 19 km deep · 42 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1089721. Read Sun, Sep 27, 2026, 5:31 PM UTC.