California earthquakes

M2.8 earthquake 38 km W of Three Rocks, California

A magnitude 2.8 earthquake struck 38 km W of Three Rocks, California on Sun, Feb 27, 1977, 3:29 PM PST (23:29 UTC), 7 km (5 mi) below the surface.

A larger quake followed: M3.8 Central 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, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1977-02-27 23:29:41 UTC
Depth
7.4 km (4.6 mi), shallow
Epicenter
36.526° N, 120.822° 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 0.3 km horizontally, 0.8 km in depth
Magnitude uncertainty
±0.19
Depth from
From location
Station coverage gap
125°
Stations used
40

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 186 in the 60 days after this one and 142 in the 30 days before it.

After

  1. 1.727 km ENE of Soledad, California · 18114 days ago · 5 km deep · 22 km away
  2. 1.527 km NE of Greenfield, California · 18114 days ago · 7 km deep · 18 km away
  3. 2.119 km SSE of Tres Pinos, California · 18114 days ago · 10 km deep · 40 km away
  4. 1.621 km NE of Soledad, California · 18113 days ago · 5 km deep · 32 km away
  5. 2.432 km W of Three Rocks, California · 18113 days ago · 6 km deep · 6 km away
  6. 2.19 km E of Gilroy, California · 18113 days ago · 7 km deep · 79 km away
  7. 2.18 km SW of Tres Pinos, California · 18113 days ago · 3 km deep · 55 km away
  8. 3.8Central California · 18113 days ago · 2 km deep · 55 km away
  9. 2.94 km SW of Tres Pinos, California · 18113 days ago · 6 km deep · 55 km away
  10. 2.016 km SSE of Tres Pinos, California · 18112 days ago · 4 km deep · 42 km away
  11. 2.27 km NE of San Juan Bautista, California · 18112 days ago · 6 km deep · 72 km away
  12. 1.821 km NW of Parkfield, California · 18111 days ago · 5 km deep · 58 km away
  13. 1.55 km SSW of Tres Pinos, California · 18111 days ago · 7 km deep · 53 km away
  14. 1.624 km NE of San Lucas, California · 18110 days ago · 6 km deep · 31 km away
  15. 1.58 km SSW of Tres Pinos, California · 18110 days ago · 3 km deep · 54 km away
  16. 1.524 km NE of Greenfield, California · 18110 days ago · 7 km deep · 21 km away
  17. 1.620 km NE of Soledad, California · 18110 days ago · 6 km deep · 30 km away
  18. 2.624 km NE of Greenfield, California · 18110 days ago · 6 km deep · 21 km away
  19. 2.024 km NE of Greenfield, California · 18110 days ago · 6 km deep · 21 km away
  20. 1.623 km NE of Greenfield, California · 18110 days ago · 5 km deep · 21 km away
  21. 2.024 km NE of Greenfield, California · 18110 days ago · 6 km deep · 21 km away
  22. 1.78 km NE of San Martin, California · 18110 days ago · 9 km deep · 93 km away
  23. 1.524 km NE of Greenfield, California · 18110 days ago · 6 km deep · 21 km away
  24. 1.520 km NE of Soledad, California · 18109 days ago · 7 km deep · 30 km away
  25. 1.924 km NE of Greenfield, California · 18109 days ago · 5 km deep · 21 km away
  26. 2.111 km NNE of Shandon, California · 18108 days ago · 12 km deep · 98 km away
  27. 3.321 km ESE of Tres Pinos, California · 18108 days ago · 5 km deep · 33 km away
  28. 2.221 km ESE of Tres Pinos, California · 18108 days ago · 5 km deep · 33 km away
  29. 1.721 km ESE of Tres Pinos, California · 18108 days ago · 5 km deep · 33 km away
  30. 1.821 km ESE of Tres Pinos, California · 18108 days ago · 4 km deep · 33 km away
  31. 1.9Central California · 18108 days ago · 4 km deep · 38 km away
  32. 1.920 km ESE of Tres Pinos, California · 18108 days ago · 4 km deep · 33 km away
  33. 1.821 km ESE of Tres Pinos, California · 18108 days ago · 1 km deep · 32 km away
  34. 2.55 km WSW of Gilroy, California · 18107 days ago · 3 km deep · 88 km away
  35. 1.628 km ENE of Soledad, California · 18106 days ago · 8 km deep · 22 km away
  36. 1.85 km SSW of Tres Pinos, California · 18106 days ago · 7 km deep · 52 km away
  37. 1.921 km ESE of Tres Pinos, California · 18106 days ago · 6 km deep · 33 km away
  38. 2.414 km NW of San Simeon, California · 18105 days ago · 10 km deep · 97 km away
  39. 1.89 km SSW of Ridgemark, California · 18104 days ago · 6 km deep · 57 km away
  40. 1.86 km ESE of Big Sur, California · 18104 days ago · 11 km deep · 89 km away
  41. 2.03 km E of Hollister, California · 18104 days ago · 8 km deep · 60 km away
  42. 1.628 km NE of Soledad, California · 18103 days ago · 7 km deep · 24 km away
  43. 1.822 km NNE of Soledad, California · 18103 days ago · 6 km deep · 35 km away
  44. 1.928 km WNW of Three Rocks, California · 18103 days ago · 12 km deep · 12 km away
  45. 3.228 km WNW of Three Rocks, California · 18102 days ago · 13 km deep · 13 km away
  46. 2.330 km WNW of Three Rocks, California · 18102 days ago · 12 km deep · 10 km away
  47. 3.68 km NW of Hollister, California · 18102 days ago · 7 km deep · 72 km away
  48. 1.8Central California · 18102 days ago · 6 km deep · 71 km away
  49. 2.325 km NE of Greenfield, California · 18101 days ago · 8 km deep · 19 km away
  50. 1.521 km NE of Soledad, California · 18100 days ago · 5 km deep · 29 km away
  51. 1.77 km WSW of Gilroy, California · 18100 days ago · 5 km deep · 90 km away
  52. 1.59 km SSW of Tres Pinos, California · 18100 days ago · 7 km deep · 51 km away
  53. 2.023 km NE of Greenfield, California · 18100 days ago · 5 km deep · 21 km away
  54. 2.28 km ENE of Gilroy, California · 18099 days ago · 7 km deep · 81 km away
  55. 2.019 km SSE of Tres Pinos, California · 18099 days ago · 4 km deep · 39 km away
  56. 1.521 km ESE of Tres Pinos, California · 18099 days ago · 5 km deep · 32 km away
  57. 2.221 km NE of Soledad, California · 18099 days ago · 6 km deep · 30 km away
  58. 2.821 km NE of Soledad, California · 18099 days ago · 6 km deep · 30 km away
  59. 2.325 km ENE of Greenfield, California · 18098 days ago · 3 km deep · 19 km away
  60. 2.125 km ENE of Greenfield, California · 18098 days ago · 5 km deep · 19 km away

The first 60 of 186.

Before

  1. 2.723 km ENE of San Ardo, California · 18114 days ago · 8 km deep · 48 km away
  2. 1.919 km SSE of Tres Pinos, California · 18115 days ago · 3 km deep · 39 km away
  3. 2.724 km NE of Greenfield, California · 18115 days ago · 5 km deep · 21 km away
  4. 1.822 km ENE of San Ardo, California · 18115 days ago · 3 km deep · 50 km away
  5. 2.123 km ENE of San Ardo, California · 18116 days ago · 7 km deep · 49 km away
  6. 1.924 km NE of Greenfield, California · 18116 days ago · 5 km deep · 21 km away
  7. 2.213 km NW of Parkfield, California · 18116 days ago · 1 km deep · 65 km away
  8. 1.624 km NE of Greenfield, California · 18116 days ago · 5 km deep · 21 km away
  9. 2.423 km NE of Greenfield, California · 18116 days ago · 5 km deep · 21 km away
  10. 2.421 km NNE of Soledad, California · 18117 days ago · 8 km deep · 34 km away
  11. 2.724 km NE of Greenfield, California · 18117 days ago · 6 km deep · 21 km away
  12. 2.424 km NE of Greenfield, California · 18117 days ago · 6 km deep · 21 km away
  13. 1.912 km NNE of San Ardo, California · 18117 days ago · 9 km deep · 46 km away
  14. 3.024 km NE of Greenfield, California · 18117 days ago · 5 km deep · 21 km away
  15. 2.625 km ESE of Tres Pinos, California · 18117 days ago · 0 km deep · 29 km away
  16. 2.49 km E of San Martin, California · 18117 days ago · 9 km deep · 88 km away
  17. 1.716 km SSE of Tres Pinos, California · 18117 days ago · 6 km deep · 43 km away
  18. 1.63 km NNW of Hollister, California · 18117 days ago · 6 km deep · 66 km away
  19. 1.98 km SSW of Tres Pinos, California · 18118 days ago · 3 km deep · 53 km away
  20. 2.88 km SSW of Tres Pinos, California · 18118 days ago · 3 km deep · 52 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1034182. Read Sat, Oct 3, 2026, 4:49 AM UTC.