California earthquakes

M2.8 earthquake 27 km W of Three Rocks, California

A magnitude 2.8 earthquake struck 27 km W of Three Rocks, California on Wed, Feb 22, 1978, 7:55 PM PST (03:55 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.8 24 km NE of Greenfield, 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
2.8 (md), micro
Local time
UTC
1978-02-23 03:55:59 UTC
Depth
8.1 km (5.0 mi), shallow
Epicenter
36.520° N, 120.701° 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, 0.5 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
160°
Stations used
35

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 98 in the 60 days after this one and 72 in the 30 days before it.

After

  1. 1.54 km SE of Tres Pinos, California · 17743 days ago · 8 km deep · 58 km away
  2. 2.423 km NNE of San Lucas, California · 17742 days ago · 5 km deep · 29 km away
  3. 2.78 km SSE of San Juan Bautista, California · 17742 days ago · 7 km deep · 76 km away
  4. 1.737 km SSW of South Dos Palos, California · 17742 days ago · 7 km deep · 22 km away
  5. 1.737 km SSW of South Dos Palos, California · 17742 days ago · 6 km deep · 22 km away
  6. 2.015 km NW of Parkfield, California · 17742 days ago · 5 km deep · 59 km away
  7. 2.51 km NE of Hollister, California · 17740 days ago · 8 km deep · 72 km away
  8. 1.61 km ENE of Hollister, California · 17740 days ago · 8 km deep · 72 km away
  9. 1.7Central California · 17740 days ago · 11 km deep · 69 km away
  10. 2.0Central California · 17739 days ago · 7 km deep · 28 km away
  11. 1.7Central California · 17739 days ago · 5 km deep · 80 km away
  12. 2.4Central California · 17738 days ago · 8 km deep · 32 km away
  13. 2.723 km ENE of San Lucas, California · 17738 days ago · 8 km deep · 35 km away
  14. 2.42 km WSW of San Juan Bautista, California · 17738 days ago · 7 km deep · 85 km away
  15. 2.612 km NW of Avenal, California · 17737 days ago · 9 km deep · 65 km away
  16. 2.011 km NW of Avenal, California · 17737 days ago · 9 km deep · 65 km away
  17. 2.50 km SW of Parkfield, California · 17737 days ago · 6 km deep · 73 km away
  18. 1.621 km NE of Soledad, California · 17735 days ago · 4 km deep · 42 km away
  19. 2.422 km ENE of Soledad, California · 17734 days ago · 4 km deep · 35 km away
  20. 2.622 km ENE of Soledad, California · 17734 days ago · 5 km deep · 35 km away
  21. 1.922 km ENE of Soledad, California · 17734 days ago · 5 km deep · 35 km away
  22. 1.631 km NE of Soledad, California · 17734 days ago · 6 km deep · 31 km away
  23. 1.921 km NE of Soledad, California · 17734 days ago · 7 km deep · 44 km away
  24. 1.624 km NE of Greenfield, California · 17732 days ago · 5 km deep · 30 km away
  25. 1.88 km SSE of San Juan Bautista, California · 17732 days ago · 7 km deep · 76 km away
  26. 2.60 km SSW of Parkfield, California · 17731 days ago · 7 km deep · 73 km away
  27. 2.4Central California · 17731 days ago · 7 km deep · 73 km away
  28. 2.211 km S of Tres Pinos, California · 17731 days ago · 3 km deep · 57 km away
  29. 1.923 km NW of Parkfield, California · 17730 days ago · 6 km deep · 52 km away
  30. 1.922 km ENE of Soledad, California · 17728 days ago · 4 km deep · 37 km away
  31. 2.222 km ENE of Soledad, California · 17728 days ago · 4 km deep · 37 km away
  32. 2.124 km ENE of Soledad, California · 17728 days ago · 2 km deep · 33 km away
  33. 1.64 km SW of Ridgemark, California · 17728 days ago · 7 km deep · 69 km away
  34. 1.523 km ENE of Soledad, California · 17727 days ago · 4 km deep · 35 km away
  35. 1.627 km NE of Soledad, California · 17726 days ago · 5 km deep · 37 km away
  36. 2.624 km NE of Greenfield, California · 17726 days ago · 2 km deep · 31 km away
  37. 1.724 km NE of Greenfield, California · 17725 days ago · 5 km deep · 31 km away
  38. 2.65 km W of Lemoore Station, California · 17725 days ago · 19 km deep · 71 km away
  39. 1.916 km NW of Parkfield, California · 17725 days ago · 4 km deep · 59 km away
  40. 2.824 km NE of Greenfield, California · 17723 days ago · 3 km deep · 31 km away
  41. 1.724 km NE of Greenfield, California · 17723 days ago · 3 km deep · 31 km away
  42. 1.99 km NW of Whitley Gardens, California · 17722 days ago · 9 km deep · 90 km away
  43. 2.16 km NE of Ridgemark, California · 17722 days ago · 6 km deep · 67 km away
  44. 1.925 km ENE of Greenfield, California · 17722 days ago · 6 km deep · 28 km away
  45. 1.724 km NE of Greenfield, California · 17719 days ago · 5 km deep · 31 km away
  46. 2.021 km NW of Parkfield, California · 17718 days ago · 4 km deep · 54 km away
  47. 2.06 km SE of Tres Pinos, California · 17716 days ago · 10 km deep · 56 km away
  48. 1.822 km NNE of Soledad, California · 17715 days ago · 5 km deep · 45 km away
  49. 1.924 km NE of Greenfield, California · 17715 days ago · 5 km deep · 31 km away
  50. 2.85 km SW of Gilroy, California · 17714 days ago · 4 km deep · 95 km away
  51. 1.79 km E of San Miguel, California · 17714 days ago · 3 km deep · 85 km away
  52. 1.717 km NW of Parkfield, California · 17713 days ago · 4 km deep · 58 km away
  53. 1.722 km NW of Parkfield, California · 17712 days ago · 2 km deep · 53 km away
  54. 2.54 km SE of Aromas, California · 17711 days ago · 8 km deep · 89 km away
  55. 2.16 km NNE of Ridgemark, California · 17710 days ago · 6 km deep · 68 km away
  56. 3.04 km SE of Aromas, California · 17710 days ago · 8 km deep · 89 km away
  57. 1.65 km WNW of San Juan Bautista, California · 17710 days ago · 7 km deep · 88 km away
  58. 2.84 km SE of Aromas, California · 17710 days ago · 8 km deep · 89 km away
  59. 2.75 km WNW of San Juan Bautista, California · 17710 days ago · 8 km deep · 88 km away
  60. 1.923 km ENE of Soledad, California · 17709 days ago · 3 km deep · 35 km away

The first 60 of 98.

Before

  1. 1.722 km NE of San Ardo, California · 17744 days ago · 7 km deep · 38 km away
  2. 1.625 km SE of Tres Pinos, California · 17744 days ago · 7 km deep · 39 km away
  3. 1.821 km NNE of Soledad, California · 17745 days ago · 8 km deep · 45 km away
  4. 1.65 km SSE of Parkfield, California · 17745 days ago · 4 km deep · 79 km away
  5. 1.97 km SE of Parkfield, California · 17746 days ago · 5 km deep · 80 km away
  6. 2.2Central California · 17746 days ago · 10 km deep · 49 km away
  7. 1.6Northern California · 17747 days ago · 5 km deep · 91 km away
  8. 1.624 km NE of Greenfield, California · 17747 days ago · 7 km deep · 33 km away
  9. 1.55 km SW of Ridgemark, California · 17748 days ago · 9 km deep · 70 km away
  10. 3.016 km SSE of Tres Pinos, California · 17748 days ago · 3 km deep · 53 km away
  11. 1.510 km NNW of Hollister, California · 17748 days ago · 7 km deep · 81 km away
  12. 1.712 km NW of Parkfield, California · 17748 days ago · 9 km deep · 62 km away
  13. 2.320 km SSE of Tres Pinos, California · 17749 days ago · 5 km deep · 48 km away
  14. 2.425 km WSW of Coalinga, California · 17750 days ago · 2 km deep · 51 km away
  15. 1.825 km NE of King City, California · 17750 days ago · 2 km deep · 27 km away
  16. 1.75 km NW of Parkfield, California · 17751 days ago · 5 km deep · 69 km away
  17. 1.629 km ENE of Soledad, California · 17752 days ago · 9 km deep · 31 km away
  18. 1.85 km SW of Gilroy, California · 17753 days ago · 3 km deep · 95 km away
  19. 1.620 km SSE of Tres Pinos, California · 17756 days ago · 5 km deep · 49 km away
  20. 1.523 km E of Tres Pinos, California · 17756 days ago · 2 km deep · 41 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1039063. Read Tue, Sep 22, 2026, 4:04 PM UTC.