California earthquakes

M1.8 earthquake 26 km NE of Greenfield, California

A magnitude 1.8 earthquake struck 26 km NE of Greenfield, California on Sat, Apr 20, 1985, 10:12 AM PST (18:12 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.3 7 km NE of Coalinga, 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1985-04-20 18:12:29 UTC
Depth
6.1 km (3.8 mi), shallow
Epicenter
36.472° N, 121.010° 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
±0.18
Depth from
From location
Station coverage gap
80°
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: 163 in the 60 days after this one and 104 in the 30 days before it.

After

  1. 1.516 km SSE of Tres Pinos, California · 15141 days ago · 5 km deep · 30 km away
  2. 1.625 km NW of San Simeon, California · 15141 days ago · 7 km deep · 80 km away
  3. 2.010 km S of Tres Pinos, California · 15141 days ago · 3 km deep · 37 km away
  4. 1.84 km N of Coalinga, California · 15140 days ago · 12 km deep · 67 km away
  5. 2.318 km SSE of Tres Pinos, California · 15140 days ago · 6 km deep · 28 km away
  6. 1.629 km SE of Big Sur, California · 15139 days ago · 6 km deep · 62 km away
  7. 3.08 km NE of San Martin, California · 15139 days ago · 7 km deep · 87 km away
  8. 1.629 km SE of Big Sur, California · 15139 days ago · 7 km deep · 62 km away
  9. 1.817 km NW of Parkfield, California · 15139 days ago · 5 km deep · 64 km away
  10. 1.98 km ENE of San Martin, California · 15139 days ago · 7 km deep · 84 km away
  11. 2.923 km ENE of Soledad, California · 15139 days ago · 4 km deep · 8 km away
  12. 2.58 km ENE of San Martin, California · 15139 days ago · 7 km deep · 86 km away
  13. 3.08 km ENE of San Martin, California · 15138 days ago · 7 km deep · 86 km away
  14. 2.09 km NE of San Martin, California · 15138 days ago · 7 km deep · 87 km away
  15. 2.010 km NNW of Coalinga, California · 15138 days ago · 8 km deep · 62 km away
  16. 1.523 km ENE of Soledad, California · 15138 days ago · 4 km deep · 8 km away
  17. 1.615 km NW of Coalinga, California · 15137 days ago · 6 km deep · 55 km away
  18. 2.226 km NE of Soledad, California · 15137 days ago · 8 km deep · 15 km away
  19. 2.010 km NE of Coalinga, California · 15137 days ago · 8 km deep · 73 km away
  20. 1.921 km NE of Soledad, California · 15137 days ago · 2 km deep · 15 km away
  21. 1.612 km N of Coalinga, California · 15137 days ago · 10 km deep · 64 km away
  22. 1.622 km NE of Soledad, California · 15137 days ago · 6 km deep · 13 km away
  23. 1.710 km NE of Coalinga, California · 15136 days ago · 8 km deep · 71 km away
  24. 1.68 km ENE of San Martin, California · 15136 days ago · 7 km deep · 84 km away
  25. 1.68 km S of San Ardo, California · 15135 days ago · 8 km deep · 59 km away
  26. 2.11 km SSW of Coalinga, California · 15135 days ago · 11 km deep · 69 km away
  27. 3.024 km ENE of Greenfield, California · 15135 days ago · 8 km deep · 4 km away
  28. 1.512 km NNE of Hollister, California · 15135 days ago · 8 km deep · 60 km away
  29. 2.323 km ENE of Soledad, California · 15135 days ago · 2 km deep · 9 km away
  30. 2.413 km S of Tres Pinos, California · 15135 days ago · 4 km deep · 34 km away
  31. 2.221 km NE of Soledad, California · 15135 days ago · 4 km deep · 19 km away
  32. 3.15 km S of Gilroy, California · 15134 days ago · 5 km deep · 74 km away
  33. 3.012 km S of Tres Pinos, California · 15134 days ago · 4 km deep · 34 km away
  34. 1.624 km NE of Greenfield, California · 15134 days ago · 6 km deep · 3 km away
  35. 1.624 km ENE of Soledad, California · 15134 days ago · 3 km deep · 6 km away
  36. 2.412 km S of Tres Pinos, California · 15134 days ago · 5 km deep · 35 km away
  37. 1.713 km S of Tres Pinos, California · 15134 days ago · 4 km deep · 34 km away
  38. 1.65 km SE of Tres Pinos, California · 15134 days ago · 8 km deep · 40 km away
  39. 2.05 km SW of Ridgemark, California · 15133 days ago · 7 km deep · 50 km away
  40. 1.828 km SE of Big Sur, California · 15133 days ago · 3 km deep · 65 km away
  41. 1.624 km NE of Greenfield, California · 15133 days ago · 7 km deep · 3 km away
  42. 2.210 km SSW of Huron, California · 15132 days ago · 2 km deep · 85 km away
  43. 1.88 km ENE of San Martin, California · 15132 days ago · 5 km deep · 85 km away
  44. 1.68 km NNW of Coalinga, California · 15132 days ago · 7 km deep · 62 km away
  45. 1.630 km NE of Soledad, California · 15132 days ago · 7 km deep · 12 km away
  46. 2.815 km SSE of Tres Pinos, California · 15131 days ago · 5 km deep · 31 km away
  47. 1.83 km ESE of Aromas, California · 15130 days ago · 7 km deep · 70 km away
  48. 2.08 km S of Huron, California · 15129 days ago · 5 km deep · 89 km away
  49. 1.58 km ENE of Coalinga, California · 15129 days ago · 11 km deep · 75 km away
  50. 2.615 km SSE of Tres Pinos, California · 15128 days ago · 5 km deep · 31 km away
  51. 3.015 km SSE of Tres Pinos, California · 15128 days ago · 5 km deep · 31 km away
  52. 2.112 km S of Tres Pinos, California · 15128 days ago · 5 km deep · 35 km away
  53. 2.015 km SSE of Tres Pinos, California · 15128 days ago · 5 km deep · 31 km away
  54. 1.624 km NE of Greenfield, California · 15127 days ago · 5 km deep · 4 km away
  55. 2.220 km NW of Parkfield, California · 15127 days ago · 4 km deep · 62 km away
  56. 2.18 km NE of San Martin, California · 15127 days ago · 8 km deep · 87 km away
  57. 1.916 km NNW of Coalinga, California · 15127 days ago · 6 km deep · 56 km away
  58. 1.69 km E of Gilroy, California · 15127 days ago · 10 km deep · 71 km away
  59. 1.921 km NE of Soledad, California · 15126 days ago · 4 km deep · 15 km away
  60. 1.524 km WSW of Lockwood, California · 15126 days ago · 9 km deep · 75 km away

The first 60 of 163.

Before

  1. 2.39 km S of Tres Pinos, California · 15142 days ago · 3 km deep · 39 km away
  2. 2.59 km S of Tres Pinos, California · 15142 days ago · 2 km deep · 39 km away
  3. 2.111 km NNW of Whitley Gardens, California · 15142 days ago · 12 km deep · 90 km away
  4. 1.65 km S of Three Rocks, California · 15143 days ago · 3 km deep · 56 km away
  5. 1.73 km ENE of Cambria, California · 15143 days ago · 1 km deep · 100 km away
  6. 1.612 km E of Coalinga, California · 15143 days ago · 9 km deep · 80 km away
  7. 2.012 km E of Coalinga, California · 15144 days ago · 8 km deep · 80 km away
  8. 1.610 km E of Coalinga, California · 15144 days ago · 0 km deep · 78 km away
  9. 2.68 km ENE of Morgan Hill, California · 15144 days ago · 3 km deep · 91 km away
  10. 2.4Northern California · 15144 days ago · 8 km deep · 75 km away
  11. 2.03 km ESE of Aromas, California · 15144 days ago · 7 km deep · 70 km away
  12. 1.722 km NE of San Lucas, California · 15145 days ago · 6 km deep · 27 km away
  13. 1.99 km SSW of Ridgemark, California · 15145 days ago · 7 km deep · 46 km away
  14. 1.713 km NNE of Coalinga, California · 15146 days ago · 9 km deep · 68 km away
  15. 2.5Central California · 15146 days ago · 9 km deep · 67 km away
  16. 2.29 km NNE of Coalinga, California · 15146 days ago · 9 km deep · 70 km away
  17. 2.126 km NE of Soledad, California · 15146 days ago · 8 km deep · 12 km away
  18. 2.325 km NW of San Simeon, California · 15147 days ago · 9 km deep · 80 km away
  19. 1.98 km NNW of Avenal, California · 15147 days ago · 5 km deep · 89 km away
  20. 1.927 km E of Tres Pinos, California · 15147 days ago · 4 km deep · 32 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc46489. Read Sat, Oct 3, 2026, 8:59 PM UTC.