California earthquakes

M2.1 earthquake 25 km ENE of Greenfield, California

A magnitude 2.1 earthquake struck 25 km ENE of Greenfield, California on Mon, May 8, 1978, 3:21 PM PDT (22:21 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M2.2 23 km NE of San Ardo, 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
2.1 (md), micro
Local time
UTC
1978-05-08 22:21:06 UTC
Depth
0.7 km (0.4 mi), shallow
Epicenter
36.437° N, 120.996° 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, 1.8 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
79°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 134 in the 60 days after this one and 42 in the 30 days before it.

After

  1. 1.925 km ENE of Greenfield, California · 17669 days ago · 1 km deep · 0 km away
  2. 1.711 km S of Tres Pinos, California · 17669 days ago · 4 km deep · 40 km away
  3. 1.822 km ENE of San Ardo, California · 17669 days ago · 2 km deep · 46 km away
  4. 2.223 km NE of San Ardo, California · 17668 days ago · 8 km deep · 35 km away
  5. 2.425 km ENE of Greenfield, California · 17668 days ago · 1 km deep · 1 km away
  6. 2.325 km ENE of Greenfield, California · 17665 days ago · 1 km deep · 1 km away
  7. 2.413 km S of Lake Nacimiento, California · 17665 days ago · 3 km deep · 93 km away
  8. 2.36 km NE of Ridgemark, California · 17664 days ago · 10 km deep · 55 km away
  9. 2.08 km NW of Hollister, California · 17660 days ago · 4 km deep · 68 km away
  10. 1.917 km SSE of Tres Pinos, California · 17660 days ago · 4 km deep · 33 km away
  11. 2.113 km NW of Avenal, California · 17659 days ago · 7 km deep · 79 km away
  12. 1.922 km NNE of Soledad, California · 17659 days ago · 8 km deep · 27 km away
  13. 1.621 km NE of Soledad, California · 17658 days ago · 7 km deep · 19 km away
  14. 2.13 km SSW of Ridgemark, California · 17657 days ago · 9 km deep · 51 km away
  15. 1.820 km SSE of Tres Pinos, California · 17657 days ago · 5 km deep · 29 km away
  16. 1.68 km NE of Tres Pinos, California · 17657 days ago · 8 km deep · 52 km away
  17. 1.77 km NE of Tres Pinos, California · 17656 days ago · 8 km deep · 51 km away
  18. 2.79 km SW of Coalinga, California · 17656 days ago · 9 km deep · 63 km away
  19. 2.617 km NW of Parkfield, California · 17656 days ago · 5 km deep · 60 km away
  20. 2.017 km NW of Parkfield, California · 17656 days ago · 5 km deep · 60 km away
  21. 3.514 km SSE of Tres Pinos, California · 17655 days ago · 3 km deep · 36 km away
  22. 3.114 km SSE of Tres Pinos, California · 17655 days ago · 3 km deep · 36 km away
  23. 1.614 km SSE of Tres Pinos, California · 17655 days ago · 3 km deep · 36 km away
  24. 1.914 km SSE of Tres Pinos, California · 17655 days ago · 3 km deep · 36 km away
  25. 1.614 km SSE of Tres Pinos, California · 17655 days ago · 3 km deep · 36 km away
  26. 1.714 km SSE of Tres Pinos, California · 17655 days ago · 3 km deep · 36 km away
  27. 1.914 km SSE of Tres Pinos, California · 17655 days ago · 3 km deep · 36 km away
  28. 2.314 km SSE of Tres Pinos, California · 17654 days ago · 3 km deep · 36 km away
  29. 1.813 km SSE of Tres Pinos, California · 17654 days ago · 3 km deep · 36 km away
  30. 2.214 km SSE of Tres Pinos, California · 17654 days ago · 4 km deep · 36 km away
  31. 1.58 km E of Gilroy, California · 17654 days ago · 4 km deep · 77 km away
  32. 2.013 km SSE of Tres Pinos, California · 17654 days ago · 4 km deep · 36 km away
  33. 1.614 km SSE of Tres Pinos, California · 17653 days ago · 3 km deep · 36 km away
  34. 2.09 km NE of San Juan Bautista, California · 17653 days ago · 4 km deep · 68 km away
  35. 1.814 km SSE of Tres Pinos, California · 17653 days ago · 3 km deep · 36 km away
  36. 1.51 km WNW of Hollister, California · 17652 days ago · 4 km deep · 60 km away
  37. 1.713 km SSE of Tres Pinos, California · 17652 days ago · 4 km deep · 36 km away
  38. 1.614 km SSE of Tres Pinos, California · 17652 days ago · 3 km deep · 36 km away
  39. 1.826 km NE of Greenfield, California · 17652 days ago · 6 km deep · 7 km away
  40. 2.422 km ENE of Soledad, California · 17651 days ago · 2 km deep · 15 km away
  41. 1.814 km SSE of Tres Pinos, California · 17651 days ago · 3 km deep · 35 km away
  42. 1.713 km SSE of Tres Pinos, California · 17650 days ago · 3 km deep · 36 km away
  43. 2.435 km W of Three Rocks, California · 17650 days ago · 3 km deep · 23 km away
  44. 1.514 km SSE of Tres Pinos, California · 17650 days ago · 3 km deep · 36 km away
  45. 2.8Central California · 17650 days ago · 3 km deep · 36 km away
  46. 2.113 km SSE of Tres Pinos, California · 17650 days ago · 4 km deep · 36 km away
  47. 1.713 km SSE of Tres Pinos, California · 17650 days ago · 4 km deep · 36 km away
  48. 2.015 km SSE of Tres Pinos, California · 17649 days ago · 4 km deep · 35 km away
  49. 1.815 km SSE of Tres Pinos, California · 17649 days ago · 4 km deep · 35 km away
  50. 1.916 km SSE of Tres Pinos, California · 17649 days ago · 5 km deep · 34 km away
  51. 2.6Central California · 17649 days ago · 9 km deep · 16 km away
  52. 3.6Central California · 17648 days ago · 9 km deep · 33 km away
  53. 2.221 km NNE of Soledad, California · 17647 days ago · 8 km deep · 25 km away
  54. 1.910 km W of Templeton, California · 17647 days ago · 3 km deep · 99 km away
  55. 2.415 km SSE of Tres Pinos, California · 17646 days ago · 3 km deep · 35 km away
  56. 1.86 km N of Greenfield, California · 17646 days ago · 3 km deep · 23 km away
  57. 3.114 km SSE of Tres Pinos, California · 17645 days ago · 3 km deep · 36 km away
  58. 2.314 km SSE of Tres Pinos, California · 17645 days ago · 4 km deep · 35 km away
  59. 2.214 km SSE of Tres Pinos, California · 17645 days ago · 4 km deep · 36 km away
  60. 2.316 km SSE of Tres Pinos, California · 17644 days ago · 5 km deep · 34 km away

The first 60 of 134.

Before

  1. 1.54 km NNW of Aromas, California · 17669 days ago · 10 km deep · 81 km away
  2. 1.725 km ENE of Greenfield, California · 17669 days ago · 5 km deep · 0 km away
  3. 1.627 km NE of San Ardo, California · 17669 days ago · 6 km deep · 34 km away
  4. 2.127 km NE of San Ardo, California · 17670 days ago · 6 km deep · 34 km away
  5. 3.36 km N of Biola, California · 17670 days ago · 10 km deep · 98 km away
  6. 1.731 km W of Three Rocks, California · 17672 days ago · 8 km deep · 24 km away
  7. 2.619 km SSW of Volta, California · 17672 days ago · 4 km deep · 55 km away
  8. 2.218 km SSE of Tres Pinos, California · 17673 days ago · 10 km deep · 32 km away
  9. 1.724 km ENE of San Lucas, California · 17673 days ago · 5 km deep · 30 km away
  10. 1.523 km ENE of Soledad, California · 17673 days ago · 3 km deep · 10 km away
  11. 1.81 km NNE of Tres Pinos, California · 17674 days ago · 8 km deep · 49 km away
  12. 2.613 km ESE of Tres Pinos, California · 17674 days ago · 10 km deep · 37 km away
  13. 1.99 km W of Coalinga, California · 17675 days ago · 11 km deep · 59 km away
  14. 1.516 km SSE of Tres Pinos, California · 17675 days ago · 4 km deep · 34 km away
  15. 1.74 km SSE of Parkfield, California · 17676 days ago · 4 km deep · 83 km away
  16. 2.323 km NE of King City, California · 17676 days ago · 7 km deep · 6 km away
  17. 1.624 km NE of Greenfield, California · 17678 days ago · 5 km deep · 4 km away
  18. 1.624 km NE of Greenfield, California · 17679 days ago · 5 km deep · 6 km away
  19. 1.716 km NW of Parkfield, California · 17679 days ago · 5 km deep · 62 km away
  20. 2.320 km NW of Parkfield, California · 17680 days ago · 4 km deep · 58 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1040192. Read Tue, Sep 22, 2026, 10:34 PM UTC.