California earthquakes

M1.8 earthquake 24 km NE of Greenfield, California

A magnitude 1.8 earthquake struck 24 km NE of Greenfield, California on Sun, Apr 1, 1990, 12:51 AM PST (08:51 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M5.4 5 km NNW of Aromas, 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
1990-04-01 08:51:39 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
36.475° N, 121.054° 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, 0.4 km in depth
Magnitude uncertainty
±0.24
Depth from
From location
Station coverage gap
70°
Stations used
39

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 195 in the 60 days after this one and 108 in the 30 days before it.

After

  1. 2.52 km SW of San Juan Bautista, California · 13334 days ago · 8 km deep · 60 km away
  2. 1.712 km NNE of Coalinga, California · 13334 days ago · 8 km deep · 70 km away
  3. 2.52 km W of San Juan Bautista, California · 13334 days ago · 3 km deep · 62 km away
  4. 1.57 km ENE of Lockwood, California · 13333 days ago · 5 km deep · 55 km away
  5. 1.635 km W of Three Rocks, California · 13333 days ago · 4 km deep · 25 km away
  6. 1.66 km NE of Ridgemark, California · 13333 days ago · 10 km deep · 49 km away
  7. 2.122 km WNW of Big Sur, California · 13332 days ago · 11 km deep · 88 km away
  8. 2.021 km E of Tres Pinos, California · 13332 days ago · 4 km deep · 39 km away
  9. 1.511 km NW of Avenal, California · 13332 days ago · 10 km deep · 87 km away
  10. 2.85 km WNW of San Juan Bautista, California · 13332 days ago · 7 km deep · 64 km away
  11. 2.324 km NE of Greenfield, California · 13332 days ago · 7 km deep · 0 km away
  12. 1.615 km NW of Parkfield, California · 13332 days ago · 5 km deep · 70 km away
  13. 1.92 km SW of San Juan Bautista, California · 13332 days ago · 8 km deep · 60 km away
  14. 2.02 km SW of San Juan Bautista, California · 13332 days ago · 8 km deep · 60 km away
  15. 1.86 km SSE of Huron, California · 13331 days ago · 8 km deep · 95 km away
  16. 1.612 km N of Coalinga, California · 13331 days ago · 7 km deep · 67 km away
  17. 1.622 km NE of Soledad, California · 13331 days ago · 9 km deep · 10 km away
  18. 1.72 km W of Ridgemark, California · 13331 days ago · 7 km deep · 48 km away
  19. 1.72 km NNW of Seacliff, California · 13330 days ago · 4 km deep · 97 km away
  20. 2.44 km ESE of Interlaken, California · 13330 days ago · 11 km deep · 76 km away
  21. 1.63 km ENE of Tres Pinos, California · 13330 days ago · 9 km deep · 42 km away
  22. 2.39 km NNE of Cambria, California · 13330 days ago · 8 km deep · 93 km away
  23. 1.51 km WSW of Freedom, California · 13329 days ago · 6 km deep · 83 km away
  24. 1.811 km SSW of Huron, California · 13329 days ago · 6 km deep · 90 km away
  25. 1.826 km WSW of Lockwood, California · 13329 days ago · 10 km deep · 73 km away
  26. 2.83 km W of San Juan Bautista, California · 13328 days ago · 7 km deep · 62 km away
  27. 1.95 km NNE of Tres Pinos, California · 13328 days ago · 4 km deep · 45 km away
  28. 1.511 km S of Tres Pinos, California · 13328 days ago · 8 km deep · 33 km away
  29. 1.713 km NW of Parkfield, California · 13328 days ago · 3 km deep · 71 km away
  30. 4.01 km NNE of Aromas, California · 13328 days ago · 6 km deep · 70 km away
  31. 1.62 km NNE of Aromas, California · 13328 days ago · 5 km deep · 70 km away
  32. 2.81 km ENE of Aromas, California · 13328 days ago · 5 km deep · 69 km away
  33. 1.712 km NNW of Coalinga, California · 13327 days ago · 6 km deep · 63 km away
  34. 1.98 km SSE of San Juan Bautista, California · 13327 days ago · 10 km deep · 52 km away
  35. 1.517 km N of Coalinga, California · 13327 days ago · 9 km deep · 64 km away
  36. 2.422 km NW of Parkfield, California · 13327 days ago · 8 km deep · 62 km away
  37. 1.920 km S of Big Sur, California · 13326 days ago · 17 km deep · 83 km away
  38. 1.921 km NE of Soledad, California · 13326 days ago · 6 km deep · 17 km away
  39. 2.93 km NNW of Seacliff, California · 13326 days ago · 5 km deep · 97 km away
  40. 2.75 km NNW of Aromas, California · 13326 days ago · 7 km deep · 75 km away
  41. 1.95 km NNW of Aromas, California · 13326 days ago · 7 km deep · 75 km away
  42. 2.15 km NNW of Aromas, California · 13326 days ago · 7 km deep · 75 km away
  43. 2.35 km NNW of Aromas, California · 13326 days ago · 7 km deep · 75 km away
  44. 2.313 km SSE of Tres Pinos, California · 13326 days ago · 2 km deep · 30 km away
  45. 3.03 km N of Aromas, California · 13326 days ago · 6 km deep · 73 km away
  46. 1.912 km NE of Cambria, California · 13326 days ago · 8 km deep · 93 km away
  47. 2.03 km SW of Hollister, California · 13326 days ago · 7 km deep · 52 km away
  48. 1.82 km ESE of Aromas, California · 13325 days ago · 6 km deep · 67 km away
  49. 2.52 km ESE of Aromas, California · 13325 days ago · 7 km deep · 67 km away
  50. 3.62 km ESE of Aromas, California · 13325 days ago · 7 km deep · 67 km away
  51. 2.23 km ESE of Aromas, California · 13325 days ago · 7 km deep · 66 km away
  52. 2.43 km ESE of Aromas, California · 13325 days ago · 7 km deep · 66 km away
  53. 2.71 km ENE of Interlaken, CA · 13325 days ago · 13 km deep · 80 km away
  54. 1.9Central California · 13325 days ago · 6 km deep · 9 km away
  55. 2.32 km ESE of Aromas, California · 13325 days ago · 7 km deep · 68 km away
  56. 3.02 km ESE of Aromas, California · 13325 days ago · 7 km deep · 68 km away
  57. 2.12 km ESE of Aromas, California · 13325 days ago · 7 km deep · 68 km away
  58. 1.83 km SW of Hollister, California · 13325 days ago · 6 km deep · 51 km away
  59. 1.610 km NNW of Coalinga, California · 13324 days ago · 7 km deep · 64 km away
  60. 1.85 km WNW of Volta, California · 13324 days ago · 7 km deep · 71 km away

The first 60 of 195.

Before

  1. 2.07 km NE of Lockwood, California · 13334 days ago · 8 km deep · 55 km away
  2. 2.15 km SSW of Tres Pinos, California · 13334 days ago · 8 km deep · 41 km away
  3. 1.86 km NE of Lockwood, California · 13335 days ago · 8 km deep · 55 km away
  4. 1.615 km NW of Parkfield, California · 13335 days ago · 5 km deep · 70 km away
  5. 1.914 km N of Coalinga, California · 13335 days ago · 8 km deep · 66 km away
  6. 3.123 km NE of San Ardo, California · 13335 days ago · 8 km deep · 44 km away
  7. 1.92 km WNW of San Juan Bautista, California · 13336 days ago · 6 km deep · 62 km away
  8. 1.822 km ENE of Soledad, California · 13336 days ago · 4 km deep · 6 km away
  9. 1.78 km SE of San Juan Bautista, California · 13336 days ago · 4 km deep · 52 km away
  10. 1.72 km N of Interlaken, California · 13336 days ago · 14 km deep · 82 km away
  11. 1.616 km NNE of Soledad, California · 13336 days ago · 6 km deep · 20 km away
  12. 1.618 km NE of Bradley, California · 13336 days ago · 25 km deep · 65 km away
  13. 1.92 km SSW of San Juan Bautista, California · 13337 days ago · 6 km deep · 59 km away
  14. 2.529 km ENE of Soledad, California · 13337 days ago · 8 km deep · 10 km away
  15. 2.44 km ENE of Tres Pinos, California · 13337 days ago · 5 km deep · 42 km away
  16. 2.522 km ENE of Soledad, California · 13337 days ago · 4 km deep · 6 km away
  17. 2.0Central California · 13338 days ago · 5 km deep · 72 km away
  18. 2.2Central California · 13338 days ago · 8 km deep · 12 km away
  19. 1.6Central California · 13338 days ago · 7 km deep · 63 km away
  20. 2.13 km WNW of San Juan Bautista, California · 13338 days ago · 7 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc155385. Read Sat, Oct 3, 2026, 10:39 AM UTC.