California earthquakes

M2.3 earthquake 24 km NE of Greenfield, California

A magnitude 2.3 earthquake struck 24 km NE of Greenfield, California on Mon, Dec 12, 1977, 9:33 PM PST (05:33 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.4 20 km NW of Parkfield, California. This one was a foreshock.

Greenfield 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
2.3 (md), micro
Local time
UTC
1977-12-13 05:33:51 UTC
Depth
6.5 km (4.0 mi), shallow
Epicenter
36.472° N, 121.046° 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 0.2 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
72°
Stations used
36

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 168 in the 60 days after this one and 23 in the 30 days before it.

After

  1. 1.923 km ENE of King City, California · 17815 days ago · 4 km deep · 20 km away
  2. 1.84 km SSW of Gilroy, California · 17814 days ago · 6 km deep · 73 km away
  3. 2.420 km NW of Parkfield, California · 17814 days ago · 8 km deep · 63 km away
  4. 1.75 km SSW of Tres Pinos, California · 17814 days ago · 7 km deep · 40 km away
  5. 2.222 km ENE of San Ardo, California · 17814 days ago · 3 km deep · 52 km away
  6. 4.221 km NNE of Soledad, California · 17813 days ago · 8 km deep · 19 km away
  7. 1.921 km NNE of Soledad, California · 17813 days ago · 7 km deep · 19 km away
  8. 1.821 km NNE of Soledad, California · 17813 days ago · 7 km deep · 19 km away
  9. 1.621 km NW of Parkfield, California · 17813 days ago · 3 km deep · 62 km away
  10. 1.521 km NNE of Soledad, California · 17813 days ago · 7 km deep · 19 km away
  11. 2.45 km WSW of Gilroy, California · 17813 days ago · 2 km deep · 76 km away
  12. 1.521 km NNE of Soledad, California · 17813 days ago · 7 km deep · 19 km away
  13. 2.421 km NNE of Soledad, California · 17813 days ago · 7 km deep · 19 km away
  14. 1.72 km SW of Hollister, California · 17812 days ago · 5 km deep · 53 km away
  15. 2.021 km NNE of Soledad, California · 17812 days ago · 7 km deep · 20 km away
  16. 3.16 km NW of Parkfield, California · 17812 days ago · 10 km deep · 77 km away
  17. 1.820 km NW of Parkfield, California · 17812 days ago · 8 km deep · 63 km away
  18. 2.411 km NW of Parkfield, California · 17812 days ago · 8 km deep · 73 km away
  19. 1.921 km NNE of Soledad, California · 17812 days ago · 7 km deep · 19 km away
  20. 2.426 km NE of Greenfield, California · 17812 days ago · 5 km deep · 2 km away
  21. 2.521 km NNE of Soledad, California · 17811 days ago · 7 km deep · 19 km away
  22. 1.821 km NE of Soledad, California · 17811 days ago · 3 km deep · 18 km away
  23. 2.13 km SSE of San Juan Bautista, California · 17811 days ago · 4 km deep · 57 km away
  24. 1.920 km NW of Parkfield, California · 17810 days ago · 8 km deep · 63 km away
  25. 1.620 km NW of Parkfield, California · 17810 days ago · 8 km deep · 63 km away
  26. 1.610 km S of Tres Pinos, California · 17809 days ago · 4 km deep · 36 km away
  27. 2.010 km SSW of Oak Shores, California · 17807 days ago · 6 km deep · 87 km away
  28. 1.622 km NE of Soledad, California · 17806 days ago · 7 km deep · 13 km away
  29. 1.89 km NW of Hollister, California · 17806 days ago · 5 km deep · 62 km away
  30. 1.623 km NW of Parkfield, California · 17806 days ago · 0 km deep · 61 km away
  31. 2.51 km NNE of Tres Pinos, California · 17805 days ago · 8 km deep · 44 km away
  32. 1.66 km NNW of Hollister, California · 17805 days ago · 3 km deep · 59 km away
  33. 1.7Central California · 17804 days ago · 1 km deep · 4 km away
  34. 2.021 km NNE of Soledad, California · 17803 days ago · 8 km deep · 19 km away
  35. 2.024 km NE of King City, California · 17801 days ago · 4 km deep · 13 km away
  36. 2.510 km SSE of Parkfield, California · 17801 days ago · 7 km deep · 94 km away
  37. 3.4Central California · 17801 days ago · 8 km deep · 96 km away
  38. 2.27 km SSE of Parkfield, California · 17801 days ago · 8 km deep · 92 km away
  39. 2.26 km WSW of Gilroy, California · 17801 days ago · 3 km deep · 77 km away
  40. 3.012 km SE of Parkfield, California · 17800 days ago · 8 km deep · 97 km away
  41. 1.912 km SW of Tres Pinos, California · 17800 days ago · 9 km deep · 41 km away
  42. 2.211 km S of Tres Pinos, California · 17800 days ago · 4 km deep · 35 km away
  43. 3.54 km NNW of Biola, California · 17799 days ago · 7 km deep · 99 km away
  44. 2.04 km ESE of Aromas, California · 17798 days ago · 6 km deep · 66 km away
  45. 2.322 km NE of San Lucas, California · 17798 days ago · 6 km deep · 29 km away
  46. 1.612 km SW of Tres Pinos, California · 17798 days ago · 9 km deep · 41 km away
  47. 2.96km SSE of Biola, CA · 17797 days ago · 6 km deep · 99 km away
  48. 2.621 km NE of Soledad, California · 17797 days ago · 7 km deep · 18 km away
  49. 3.39 km NNW of Hollister, California · 17797 days ago · 2 km deep · 62 km away
  50. 1.91 km ESE of Tres Pinos, California · 17797 days ago · 7 km deep · 42 km away
  51. 1.619 km ENE of Big Sur, California · 17797 days ago · 7 km deep · 52 km away
  52. 1.6Central California · 17797 days ago · 8 km deep · 41 km away
  53. 1.623 km NE of Greenfield, California · 17797 days ago · 1 km deep · 1 km away
  54. 1.9Central California · 17797 days ago · 8 km deep · 19 km away
  55. 2.45 km NW of Kerman, California · 17796 days ago · -1 km deep · 90 km away
  56. 1.84 km NE of Interlaken, California · 17796 days ago · 12 km deep · 82 km away
  57. 2.312 km SW of Tres Pinos, California · 17796 days ago · 9 km deep · 41 km away
  58. 2.6Central California · 17796 days ago · 6 km deep · 18 km away
  59. 2.1Central California · 17796 days ago · 4 km deep · 41 km away
  60. 2.022 km ENE of Tres Pinos, California · 17796 days ago · 6 km deep · 42 km away

The first 60 of 168.

Before

  1. 1.923 km NW of Parkfield, California · 17816 days ago · 7 km deep · 61 km away
  2. 1.96 km WSW of Gilroy, California · 17817 days ago · 5 km deep · 77 km away
  3. 2.222 km NE of San Lucas, California · 17817 days ago · 7 km deep · 32 km away
  4. 2.55 km SSW of Gilroy, California · 17817 days ago · 7 km deep · 72 km away
  5. 2.02 km NNW of Hollister, California · 17817 days ago · 7 km deep · 56 km away
  6. 1.95 km NNE of San Juan Bautista, California · 17817 days ago · 6 km deep · 63 km away
  7. 1.628 km NE of Soledad, California · 17818 days ago · 6 km deep · 15 km away
  8. 1.725 km W of Coalinga, California · 17818 days ago · 6 km deep · 49 km away
  9. 1.53 km E of Interlaken, California · 17819 days ago · 9 km deep · 78 km away
  10. 2.322 km NE of Soledad, California · 17819 days ago · 9 km deep · 12 km away
  11. 1.89 km ENE of San Martin, California · 17820 days ago · 6 km deep · 82 km away
  12. 2.022 km NE of Soledad, California · 17820 days ago · 0 km deep · 12 km away
  13. 1.98 km NE of Gilroy, California · 17820 days ago · 6 km deep · 78 km away
  14. 3.03 km WSW of San Juan Bautista, California · 17821 days ago · 7 km deep · 62 km away
  15. 1.710 km SW of Ridgemark, California · 17821 days ago · 9 km deep · 48 km away
  16. 2.36 km WSW of Gilroy, California · 17822 days ago · 3 km deep · 78 km away
  17. 2.421 km NE of Soledad, California · 17822 days ago · 6 km deep · 18 km away
  18. 1.84 km NE of Tres Pinos, California · 17822 days ago · 10 km deep · 45 km away
  19. 2.026 km NE of Greenfield, California · 17823 days ago · 6 km deep · 3 km away
  20. 1.62 km WSW of Ridgemark, California · 17824 days ago · 6 km deep · 48 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1038121. Read Tue, Sep 22, 2026, 8:57 PM UTC.