California earthquakes

M2.4 earthquake 15 km SSW of Mad River, California

A magnitude 2.4 earthquake struck 15 km SSW of Mad River, California on Sat, Jun 20, 1981, 1:29 AM PDT (08:29 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M2.6 21 km SSW 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
2.4 (md), micro
Local time
UTC
1981-06-20 08:29:34 UTC
Depth
6.8 km (4.2 mi), shallow
Epicenter
40.333° N, 123.611° 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 0.4 km horizontally, 1.3 km in depth
Depth from
From location
Station coverage gap
228°, 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: 119 in the 60 days after this one and 79 in the 30 days before it.

After

  1. 2.621 km SSW of Ferndale, California · 16530 days ago · 23 km deep · 65 km away
  2. 1.618 km SW of Scotia, California · 16530 days ago · 31 km deep · 55 km away
  3. 3.038 km SW of Ferndale, California · 16530 days ago · 23 km deep · 82 km away
  4. 4.036 km SSW of Ferndale, California · 16529 days ago · 22 km deep · 74 km away
  5. 3.136 km SSW of Ferndale, California · 16529 days ago · 22 km deep · 75 km away
  6. 1.811 km W of Junction City, California · 16529 days ago · 14 km deep · 59 km away
  7. 1.815 km W of Mad River, California · 16528 days ago · 1 km deep · 15 km away
  8. 1.634 km SSW of Ferndale, California · 16528 days ago · 23 km deep · 72 km away
  9. 2.34 km NNW of Blue Lake, California · 16528 days ago · 5 km deep · 74 km away
  10. 1.616 km WNW of Manila, California · 16527 days ago · 0 km deep · 90 km away
  11. 2.140 km SW of Ferndale, California · 16526 days ago · 27 km deep · 86 km away
  12. 1.917 km W of Ferndale, California · 16526 days ago · 19 km deep · 78 km away
  13. 2.041 km SW of Ferndale, California · 16526 days ago · 29 km deep · 85 km away
  14. 3.542 km SW of Ferndale, California · 16526 days ago · 27 km deep · 89 km away
  15. 3.635 km SW of Scotia, California · 16525 days ago · 28 km deep · 69 km away
  16. 1.626 km W of Indianola, California · 16525 days ago · 22 km deep · 89 km away
  17. 3.527 km SSW of Ferndale, California · 16525 days ago · 17 km deep · 64 km away
  18. 2.346 km SW of Ferndale, California · 16524 days ago · 30 km deep · 93 km away
  19. 1.97 km WSW of Junction City, California · 16524 days ago · 10 km deep · 58 km away
  20. 2.4near the coast of Northern California · 16523 days ago · 23 km deep · 70 km away
  21. 3.817 km WSW of Redcrest, California · 16523 days ago · 34 km deep · 44 km away
  22. 2.116 km SSW of Scotia, California · 16523 days ago · 32 km deep · 46 km away
  23. 3.0near the coast of Northern California · 16520 days ago · 22 km deep · 78 km away
  24. 2.038 km SW of Ferndale, CA · 16520 days ago · 32 km deep · 80 km away
  25. 2.137 km SW of Ferndale, California · 16520 days ago · 21 km deep · 79 km away
  26. 2.09 km E of Redcrest, California · 16520 days ago · 30 km deep · 21 km away
  27. 2.236 km SW of Ferndale, California · 16519 days ago · 28 km deep · 77 km away
  28. 1.544 km SW of Ferndale, California · 16519 days ago · 22 km deep · 88 km away
  29. 1.921 km W of Ferndale, California · 16519 days ago · 22 km deep · 80 km away
  30. 2.035 km SSW of Ferndale, California · 16519 days ago · 25 km deep · 72 km away
  31. 1.66 km SE of Ferndale, California · 16519 days ago · 2 km deep · 55 km away
  32. 3.15 km WSW of Paskenta, California · 16518 days ago · 4 km deep · 100 km away
  33. 2.111 km WSW of Weott, California · 16518 days ago · 4 km deep · 37 km away
  34. 1.66 km W of Trinidad, California · 16518 days ago · 19 km deep · 95 km away
  35. 3.94 km SSW of Big Lagoon, California · 16518 days ago · 13 km deep · 99 km away
  36. 3.14 km SSE of McKinleyville, California · 16517 days ago · 26 km deep · 75 km away
  37. 2.326 km SSW of Ferndale, California · 16516 days ago · 25 km deep · 67 km away
  38. 2.215 km WNW of Fields Landing, California · 16516 days ago · 8 km deep · 82 km away
  39. 2.140 km SW of Ferndale, California · 16515 days ago · 31 km deep · 84 km away
  40. 1.611 km SSW of Burnt Ranch, California · 16515 days ago · 30 km deep · 44 km away
  41. 2.09 km NNW of Manila, California · 16514 days ago · 14 km deep · 83 km away
  42. 1.816 km SW of Scotia, California · 16514 days ago · 29 km deep · 55 km away
  43. 1.836 km SW of Ferndale, California · 16513 days ago · 22 km deep · 79 km away
  44. 2.018 km SSW of Ferndale, California · 16512 days ago · 17 km deep · 62 km away
  45. 1.912 km N of Alderpoint, California · 16511 days ago · 29 km deep · 5 km away
  46. 2.121 km SW of Ferndale, California · 16510 days ago · 21 km deep · 68 km away
  47. 2.05 km NW of Redway, California · 16508 days ago · 20 km deep · 29 km away
  48. 2.242 km SW of Ferndale, California · 16507 days ago · 24 km deep · 87 km away
  49. 1.916 km NW of Samoa, California · 16507 days ago · 0 km deep · 89 km away
  50. 2.413 km NW of Manila, California · 16507 days ago · 12 km deep · 87 km away
  51. 3.213 km NW of Manila, California · 16507 days ago · 11 km deep · 87 km away
  52. 1.57 km WSW of Rio Dell, California · 16506 days ago · 17 km deep · 52 km away
  53. 2.438 km SW of Ferndale, California · 16505 days ago · 28 km deep · 83 km away
  54. 1.72 km SSW of Loleta, California · 16505 days ago · 21 km deep · 62 km away
  55. 2.345 km SW of Ferndale, California · 16504 days ago · 22 km deep · 91 km away
  56. 2.144 km SW of Ferndale, California · 16504 days ago · 22 km deep · 89 km away
  57. 1.749 km SW of Ferndale, California · 16504 days ago · 17 km deep · 95 km away
  58. 1.738 km WSW of Ferndale, California · 16504 days ago · 27 km deep · 89 km away
  59. 2.018 km ESE of Blue Lake, California · 16503 days ago · 32 km deep · 55 km away
  60. 4.623 km WSW of Weott, California · 16503 days ago · 10 km deep · 49 km away

The first 60 of 119.

Before

  1. 1.720 km SW of Scotia, California · 16530 days ago · 31 km deep · 57 km away
  2. 1.52 km NNW of Indianola, California · 16530 days ago · 2 km deep · 67 km away
  3. 1.621 km WNW of Hyampom, California · 16530 days ago · 26 km deep · 38 km away
  4. 2.726 km WNW of Samoa, California · 16531 days ago · 4 km deep · 98 km away
  5. 2.932 km SW of Scotia, California · 16531 days ago · 25 km deep · 65 km away
  6. 2.111 km NNE of Covelo, California · 16532 days ago · 9 km deep · 59 km away
  7. 2.437 km SW of Ferndale, California · 16532 days ago · 25 km deep · 82 km away
  8. 2.237 km SW of Ferndale, California · 16533 days ago · 35 km deep · 81 km away
  9. 2.14 km ENE of Garberville, California · 16533 days ago · 4 km deep · 27 km away
  10. 2.327 km SW of Scotia, California · 16534 days ago · 13 km deep · 58 km away
  11. 2.57 km ESE of Burnt Ranch, California · 16534 days ago · 5 km deep · 54 km away
  12. 2.537 km SW of Ferndale, California · 16534 days ago · 22 km deep · 81 km away
  13. 2.610 km N of Covelo, California · 16534 days ago · 4 km deep · 60 km away
  14. 2.739 km SW of Ferndale, California · 16534 days ago · 24 km deep · 84 km away
  15. 3.039 km SW of Ferndale, California · 16534 days ago · 26 km deep · 84 km away
  16. 1.95 km WNW of Fields Landing, California · 16535 days ago · 10 km deep · 72 km away
  17. 1.835 km SW of Scotia, California · 16535 days ago · 18 km deep · 69 km away
  18. 3.431 km WSW of Ferndale, California · 16535 days ago · 27 km deep · 84 km away
  19. 1.76 km NE of Mad River, California · 16535 days ago · -1 km deep · 22 km away
  20. 2.537 km SW of Ferndale, California · 16535 days ago · 29 km deep · 81 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1064710. Read Tue, Sep 22, 2026, 11:17 AM UTC.