California earthquakes

M1.5 earthquake 24 km ENE of Hydesville, California

A magnitude 1.5 earthquake struck 24 km ENE of Hydesville, California on Wed, Sep 27, 1978, 2:12 PM PDT (21:12 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M2.6 25 km SSW of Ferndale, California. This one was a foreshock.

Hydesville 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
1978-09-27 21:12:00 UTC
Depth
7.5 km (4.6 mi), shallow
Epicenter
40.627° N, 123.826° 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 0.6 km horizontally, 0.8 km in depth
Depth from
From location
Station coverage gap
150°
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 165 in the 60 days after this one and 34 in the 30 days before it.

After

  1. 2.625 km SSW of Ferndale, California · 17527 days ago · 19 km deep · 57 km away
  2. 1.540 km SW of Ferndale, California · 17526 days ago · 20 km deep · 74 km away
  3. 1.617 km SW of Scotia, California · 17525 days ago · 22 km deep · 46 km away
  4. 2.615 km WSW of Ferndale, California · 17524 days ago · 17 km deep · 52 km away
  5. 1.85 km NNE of Myers Flat, California · 17523 days ago · 3 km deep · 35 km away
  6. 2.621 km WSW of Weott, California · 17522 days ago · 5 km deep · 52 km away
  7. 3.025 km SSW of Ferndale, California · 17521 days ago · 20 km deep · 57 km away
  8. 2.832 km SW of Ferndale, California · 17520 days ago · 24 km deep · 66 km away
  9. 2.29 km E of Hydesville, California · 17520 days ago · 21 km deep · 16 km away
  10. 4.618 km SW of Ferndale, California · 17518 days ago · 25 km deep · 54 km away
  11. 2.818 km SSW of Ferndale, California · 17518 days ago · 23 km deep · 52 km away
  12. 1.511 km SW of Ferndale, California · 17518 days ago · 24 km deep · 48 km away
  13. 1.815 km WSW of Ferndale, California · 17518 days ago · 24 km deep · 52 km away
  14. 1.618 km SW of Ferndale, California · 17518 days ago · 21 km deep · 53 km away
  15. 2.318 km WSW of Ferndale, California · 17518 days ago · 25 km deep · 55 km away
  16. 2.119 km SSW of Ferndale, California · 17518 days ago · 23 km deep · 53 km away
  17. 2.017 km WSW of Ferndale, California · 17518 days ago · 24 km deep · 54 km away
  18. 1.525 km SW of Scotia, California · 17518 days ago · 22 km deep · 53 km away
  19. 3.316 km SSW of Ferndale, California · 17518 days ago · 26 km deep · 49 km away
  20. 1.715 km SW of Ferndale, California · 17518 days ago · 25 km deep · 51 km away
  21. 1.929 km WSW of Ferndale, California · 17518 days ago · 25 km deep · 66 km away
  22. 1.918 km SSW of Ferndale, California · 17518 days ago · 23 km deep · 51 km away
  23. 1.618 km SW of Ferndale, California · 17518 days ago · 23 km deep · 55 km away
  24. 1.620 km SW of Ferndale, California · 17518 days ago · 26 km deep · 55 km away
  25. 2.417 km SW of Ferndale, California · 17518 days ago · 25 km deep · 53 km away
  26. 2.419 km WSW of Ferndale, California · 17518 days ago · 24 km deep · 56 km away
  27. 1.514 km SW of Scotia, California · 17518 days ago · 21 km deep · 43 km away
  28. 1.616 km WSW of Ferndale, California · 17518 days ago · 23 km deep · 53 km away
  29. 1.78 km NNW of Willow Creek, California · 17518 days ago · 4 km deep · 45 km away
  30. 1.615 km SW of Scotia, California · 17518 days ago · 27 km deep · 43 km away
  31. 1.725 km SW of Ferndale, California · 17518 days ago · 27 km deep · 61 km away
  32. 1.811 km SW of Ferndale, California · 17518 days ago · 23 km deep · 48 km away
  33. 2.817 km SW of Ferndale, California · 17518 days ago · 21 km deep · 53 km away
  34. 1.615 km WSW of Ferndale, California · 17518 days ago · 23 km deep · 52 km away
  35. 1.637 km WSW of Ferndale, California · 17518 days ago · 26 km deep · 74 km away
  36. 1.615 km WSW of Ferndale, California · 17518 days ago · 23 km deep · 52 km away
  37. 1.611 km NW of Manila, California · 17518 days ago · 30 km deep · 49 km away
  38. 3.916 km SW of Ferndale, California · 17518 days ago · 23 km deep · 53 km away
  39. 1.917 km SW of Ferndale, California · 17518 days ago · 24 km deep · 54 km away
  40. 2.118 km SW of Ferndale, California · 17518 days ago · 23 km deep · 54 km away
  41. 1.716 km SW of Ferndale, California · 17518 days ago · 22 km deep · 53 km away
  42. 1.523 km SW of Ferndale, California · 17518 days ago · 22 km deep · 59 km away
  43. 1.755 km WSW of Ferndale, California · 17518 days ago · 20 km deep · 93 km away
  44. 1.613 km NW of Big Lagoon, California · 17518 days ago · 2 km deep · 77 km away
  45. 1.822 km SW of Ferndale, California · 17518 days ago · 26 km deep · 58 km away
  46. 1.913 km SSW of Willow Creek, California · 17518 days ago · 8 km deep · 25 km away
  47. 1.518 km WSW of Ferndale, California · 17517 days ago · 20 km deep · 55 km away
  48. 1.943 km W of Indianola, California · 17517 days ago · 26 km deep · 79 km away
  49. 1.739 km W of Ferndale, California · 17516 days ago · 24 km deep · 77 km away
  50. 1.511 km SSW of Ferndale, California · 17516 days ago · 26 km deep · 46 km away
  51. 2.939 km SW of Ferndale, California · 17515 days ago · 23 km deep · 73 km away
  52. 1.957 km W of Ferndale, California · 17514 days ago · 4 km deep · 95 km away
  53. 1.845 km WSW of Ferndale, California · 17514 days ago · 17 km deep · 83 km away
  54. 2.025 km SSW of Ferndale, California · 17513 days ago · 19 km deep · 56 km away
  55. 1.79 km N of Ruth, California · 17513 days ago · 19 km deep · 53 km away
  56. 2.25 km WSW of Hyampom, California · 17513 days ago · 24 km deep · 27 km away
  57. 2.712 km E of Hayfork, California · 17513 days ago · 4 km deep · 68 km away
  58. 2.06 km WSW of Samoa, California · 17512 days ago · 24 km deep · 41 km away
  59. 1.612 km S of Ferndale, California · 17512 days ago · 23 km deep · 41 km away
  60. 1.6Northern California · 17511 days ago · 32 km deep · 35 km away

The first 60 of 165.

Before

  1. 2.510 km S of Ferndale, California · 17528 days ago · 18 km deep · 41 km away
  2. 1.610 km S of Ferndale, California · 17528 days ago · 18 km deep · 41 km away
  3. 1.822 km NNW of Shelter Cove, California · 17528 days ago · 9 km deep · 54 km away
  4. 2.322 km WSW of Weott, California · 17528 days ago · 7 km deep · 52 km away
  5. 3.011 km ENE of Weott, California · 17528 days ago · 30 km deep · 28 km away
  6. 2.231 km SW of Scotia, California · 17528 days ago · 10 km deep · 60 km away
  7. 2.116 km WSW of Scotia, California · 17529 days ago · 19 km deep · 44 km away
  8. 1.65 km NNE of Myers Flat, California · 17530 days ago · 2 km deep · 35 km away
  9. 1.66 km NE of Myers Flat, California · 17530 days ago · 1 km deep · 35 km away
  10. 2.06 km NNE of Myers Flat, California · 17530 days ago · 3 km deep · 35 km away
  11. 2.36 km NNE of Myers Flat, California · 17531 days ago · 5 km deep · 35 km away
  12. 1.913 km WSW of Burnt Ranch, California · 17533 days ago · 31 km deep · 23 km away
  13. 1.615 km WSW of Scotia, California · 17533 days ago · 18 km deep · 44 km away
  14. 2.015 km WSW of Burnt Ranch, California · 17533 days ago · 31 km deep · 21 km away
  15. 3.717 km WSW of Burnt Ranch, California · 17533 days ago · 31 km deep · 19 km away
  16. 2.024 km W of Indianola, California · 17533 days ago · 23 km deep · 59 km away
  17. 1.541 km SW of Ferndale, California · 17535 days ago · 20 km deep · 74 km away
  18. 1.527 km WSW of Ferndale, California · 17536 days ago · 18 km deep · 64 km away
  19. 2.4near the coast of Northern California · 17536 days ago · 19 km deep · 58 km away
  20. 1.625 km SSW of Ferndale, California · 17537 days ago · 19 km deep · 57 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1042521. Read Wed, Sep 23, 2026, 8:29 AM UTC.