California earthquakes

M1.5 earthquake 11 km NW of Hayfork, California

A magnitude 1.5 earthquake struck 11 km NW of Hayfork, California on Fri, Apr 20, 1979, 7:54 AM PST (15:54 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M2.9 11 km WNW of Samoa, 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
1.5 (md), micro
Local time
UTC
1979-04-20 15:54:02 UTC
Depth
4.2 km (2.6 mi), shallow
Epicenter
40.637° N, 123.269° 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 2.1 km horizontally, 7.4 km in depth
Depth from
From location
Station coverage gap
295°, poorly surrounded by stations
Stations used
4

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 72 in the 60 days after this one and 40 in the 30 days before it.

After

  1. 1.912 km W of Samoa, California · 17330 days ago · 22 km deep · 92 km away
  2. 2.324 km SSW of Ferndale, California · 17329 days ago · 19 km deep · 99 km away
  3. 2.613 km WNW of Ferndale, California · 17329 days ago · 21 km deep · 96 km away
  4. 2.013 km WSW of Burnt Ranch, California · 17329 days ago · 34 km deep · 34 km away
  5. 1.66 km WSW of Scotia, California · 17328 days ago · 27 km deep · 79 km away
  6. 1.614 km SSW of Ferndale, California · 17326 days ago · 26 km deep · 89 km away
  7. 2.03 km NNE of Hydesville, California · 17326 days ago · 24 km deep · 70 km away
  8. 1.710 km SW of Scotia, California · 17325 days ago · 17 km deep · 81 km away
  9. 1.63 km N of Redway, California · 17324 days ago · 17 km deep · 71 km away
  10. 1.710 km SW of Scotia, California · 17323 days ago · 17 km deep · 81 km away
  11. 2.114 km SSW of Willow Creek, California · 17322 days ago · 7 km deep · 42 km away
  12. 2.911 km WNW of Samoa, California · 17320 days ago · 23 km deep · 91 km away
  13. 1.719 km E of Hydesville, California · 17320 days ago · 20 km deep · 51 km away
  14. 1.86 km NW of Samoa, California · 17317 days ago · 35 km deep · 86 km away
  15. 1.68 km W of Weott, California · 17317 days ago · 23 km deep · 72 km away
  16. 1.816 km WSW of Scotia, California · 17316 days ago · 21 km deep · 89 km away
  17. 1.516 km WSW of Scotia, California · 17316 days ago · 18 km deep · 88 km away
  18. 1.88 km NW of Manila, California · 17313 days ago · 18 km deep · 87 km away
  19. 1.66 km SW of Ferndale, California · 17312 days ago · 25 km deep · 89 km away
  20. 1.63 km ENE of Loleta, California · 17312 days ago · 20 km deep · 77 km away
  21. 1.615 km SSW of Ferndale, California · 17311 days ago · 9 km deep · 94 km away
  22. 2.427 km SSW of Scotia, California · 17310 days ago · 21 km deep · 93 km away
  23. 2.121 km WSW of Weott, California · 17309 days ago · 3 km deep · 86 km away
  24. 1.919 km WSW of Scotia, California · 17307 days ago · 28 km deep · 92 km away
  25. 1.89 km WSW of Scotia, California · 17307 days ago · 27 km deep · 81 km away
  26. 2.99 km WSW of Scotia, California · 17307 days ago · 28 km deep · 82 km away
  27. 1.78 km WSW of Scotia, California · 17307 days ago · 27 km deep · 81 km away
  28. 2.516 km WSW of Ferndale, California · 17306 days ago · 17 km deep · 100 km away
  29. 2.216 km WSW of Ferndale, California · 17306 days ago · 17 km deep · 100 km away
  30. 1.715 km WSW of Ferndale, California · 17306 days ago · 15 km deep · 99 km away
  31. 1.68 km SW of Ferndale, California · 17305 days ago · 22 km deep · 91 km away
  32. 1.913 km SE of Blue Lake, California · 17305 days ago · 22 km deep · 53 km away
  33. 1.98 km W of McKinleyville, California · 17304 days ago · 1 km deep · 86 km away
  34. 2.916 km NNW of Coffee Creek, California · 17303 days ago · 26 km deep · 75 km away
  35. 1.77 km W of Rio Dell, California · 17303 days ago · 18 km deep · 80 km away
  36. 1.510 km SSE of Ferndale, California · 17303 days ago · 21 km deep · 83 km away
  37. 1.82 km SSW of Scotia, California · 17302 days ago · 20 km deep · 73 km away
  38. 1.68 km W of Rio Dell, California · 17302 days ago · 18 km deep · 81 km away
  39. 1.626 km SW of Scotia, California · 17302 days ago · 25 km deep · 98 km away
  40. 1.67 km W of Rio Dell, California · 17301 days ago · 17 km deep · 80 km away
  41. 1.77 km W of Rio Dell, California · 17301 days ago · 18 km deep · 80 km away
  42. 1.510 km WSW of Scotia, California · 17301 days ago · 19 km deep · 83 km away
  43. 2.237 km W of Coffee Creek, California · 17301 days ago · 41 km deep · 51 km away
  44. 1.730 km SW of Scotia, California · 17298 days ago · 7 km deep · 100 km away
  45. 1.67 km W of Rio Dell, California · 17297 days ago · 17 km deep · 80 km away
  46. 1.64 km NW of Ferndale, California · 17297 days ago · 18 km deep · 87 km away
  47. 1.611 km ESE of Burnt Ranch, California · 17297 days ago · 16 km deep · 17 km away
  48. 1.99 km W of Scotia, California · 17296 days ago · 21 km deep · 82 km away
  49. 1.72 km NE of Rio Dell, California · 17295 days ago · 22 km deep · 70 km away
  50. 1.614 km ESE of Indianola, California · 17295 days ago · 20 km deep · 58 km away
  51. 1.88 km WSW of Trinidad, California · 17295 days ago · 20 km deep · 93 km away
  52. 1.711 km S of Scotia, California · 17292 days ago · 19 km deep · 77 km away
  53. 1.611 km NE of Miranda, California · 17292 days ago · 24 km deep · 54 km away
  54. 1.924 km SW of Scotia, California · 17287 days ago · 28 km deep · 95 km away
  55. 2.214 km ENE of Mad River, California · 17287 days ago · 31 km deep · 17 km away
  56. 2.39 km ESE of Hydesville, California · 17286 days ago · 20 km deep · 62 km away
  57. 1.63 km NW of Fortuna, California · 17284 days ago · 22 km deep · 78 km away
  58. 2.67 km E of Pine Hills, California · 17282 days ago · 24 km deep · 67 km away
  59. 1.913 km SW of Ferndale, California · 17282 days ago · 23 km deep · 96 km away
  60. 1.60 km WSW of Benbow, California · 17280 days ago · -1 km deep · 77 km away

The first 60 of 72.

Before

  1. 2.211 km N of Willow Creek, California · 17330 days ago · 7 km deep · 55 km away
  2. 2.511 km WSW of Ferndale, California · 17331 days ago · 16 km deep · 96 km away
  3. 1.817 km SE of Alderpoint, California · 17332 days ago · 12 km deep · 64 km away
  4. 1.515 km NE of Blue Lake, California · 17332 days ago · 22 km deep · 60 km away
  5. 1.610 km WSW of Redcrest, California · 17332 days ago · 29 km deep · 74 km away
  6. 1.718 km SW of Weott, California · 17335 days ago · 13 km deep · 83 km away
  7. 2.25 km ESE of Burnt Ranch, California · 17335 days ago · 22 km deep · 21 km away
  8. 1.826 km SSW of Scotia, California · 17336 days ago · 18 km deep · 92 km away
  9. 1.78 km W of Rio Dell, California · 17336 days ago · 19 km deep · 81 km away
  10. 1.76 km NNW of Willow Creek, California · 17337 days ago · 22 km deep · 52 km away
  11. 2.17 km ENE of Phillipsville, California · 17339 days ago · 24 km deep · 58 km away
  12. 1.66 km N of Mad River, California · 17340 days ago · -1 km deep · 24 km away
  13. 1.93 km WSW of Redcrest, California · 17341 days ago · 23 km deep · 67 km away
  14. 2.04 km NE of Hydesville, California · 17341 days ago · 21 km deep · 67 km away
  15. 2.26 km ENE of Mad River, California · 17341 days ago · 30 km deep · 23 km away
  16. 1.66 km NE of Phillipsville, California · 17343 days ago · -1 km deep · 58 km away
  17. 1.97 km NE of Phillipsville, California · 17343 days ago · -1 km deep · 57 km away
  18. 1.511 km SSW of Ferndale, California · 17343 days ago · 21 km deep · 90 km away
  19. 2.62 km N of Hyampom, California · 17343 days ago · 31 km deep · 16 km away
  20. 1.718 km SW of Scotia, California · 17345 days ago · 29 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1045484. Read Thu, Oct 1, 2026, 12:50 AM UTC.