California earthquakes

M1.7 earthquake 37 km NE of Greenfield, California

A magnitude 1.7 earthquake struck 37 km NE of Greenfield, California on Sun, Apr 12, 1987, 6:37 AM PDT (13:37 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M4.1 5 km NNE of Tres Pinos, 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
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1987-04-12 13:37:57 UTC
Depth
13.3 km (8.3 mi), shallow
Epicenter
36.523° N, 120.910° 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 0.6 km horizontally, 1.4 km in depth
Depth from
From location
Station coverage gap
191°, poorly surrounded by stations
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 144 in the 60 days after this one and 81 in the 30 days before it.

After

  1. 2.715 km NW of Parkfield, California · 14420 days ago · 5 km deep · 66 km away
  2. 1.925 km NE of King City, California · 14420 days ago · 1 km deep · 15 km away
  3. 3.02 km W of Hollister, California · 14420 days ago · 5 km deep · 59 km away
  4. 2.29 km NNW of Coalinga, California · 14420 days ago · 6 km deep · 56 km away
  5. 3.111 km SW of Lake Nacimiento, California · 14419 days ago · 4 km deep · 98 km away
  6. 1.6Central California · 14419 days ago · 9 km deep · 16 km away
  7. 2.09 km NNE of Coalinga, California · 14418 days ago · 9 km deep · 64 km away
  8. 2.122 km ENE of Soledad, California · 14417 days ago · 8 km deep · 18 km away
  9. 1.85 km ENE of Hollister, California · 14416 days ago · 7 km deep · 56 km away
  10. 1.622 km ENE of San Ardo, California · 14415 days ago · 3 km deep · 51 km away
  11. 1.623 km NE of San Ardo, California · 14415 days ago · 7 km deep · 39 km away
  12. 3.128 km SE of Tres Pinos, California · 14415 days ago · 8 km deep · 19 km away
  13. 3.022 km NE of San Lucas, California · 14415 days ago · 9 km deep · 30 km away
  14. 2.822 km NE of San Lucas, California · 14415 days ago · 9 km deep · 30 km away
  15. 1.721 km NE of San Lucas, California · 14415 days ago · 8 km deep · 31 km away
  16. 2.822 km NE of San Lucas, California · 14415 days ago · 9 km deep · 30 km away
  17. 1.621 km NE of San Lucas, California · 14415 days ago · 7 km deep · 31 km away
  18. 1.95 km NNE of Coalinga, California · 14414 days ago · 8 km deep · 65 km away
  19. 1.617 km NNE of Soledad, California · 14414 days ago · 11 km deep · 31 km away
  20. 2.01 km W of Tres Pinos, California · 14414 days ago · 4 km deep · 48 km away
  21. 2.78 km NE of San Martin, California · 14414 days ago · 7 km deep · 87 km away
  22. 1.810 km ENE of Coalinga, California · 14413 days ago · 9 km deep · 71 km away
  23. 1.524 km NE of Greenfield, California · 14413 days ago · 0 km deep · 13 km away
  24. 1.84 km N of Coalinga, California · 14413 days ago · 12 km deep · 63 km away
  25. 1.75 km ENE of Hollister, California · 14412 days ago · 7 km deep · 56 km away
  26. 2.017 km S of Big Sur, California · 14412 days ago · 12 km deep · 92 km away
  27. 1.935 km W of Lockwood, California · 14412 days ago · 11 km deep · 79 km away
  28. 1.921 km NNE of Soledad, California · 14411 days ago · 6 km deep · 26 km away
  29. 1.621 km NE of Soledad, California · 14411 days ago · 2 km deep · 23 km away
  30. 2.221 km NNE of Soledad, California · 14411 days ago · 6 km deep · 26 km away
  31. 2.123 km NE of San Ardo, California · 14410 days ago · 7 km deep · 39 km away
  32. 2.123 km NNE of San Lucas, California · 14409 days ago · 5 km deep · 25 km away
  33. 2.82 km SW of Ridgemark, California · 14407 days ago · 13 km deep · 52 km away
  34. 2.3Central California · 14407 days ago · 4 km deep · 64 km away
  35. 2.421 km NW of Parkfield, California · 14406 days ago · 4 km deep · 61 km away
  36. 2.025 km NE of Soledad, California · 14406 days ago · 9 km deep · 19 km away
  37. 1.63 km NNE of Pacific Grove, California · 14406 days ago · 11 km deep · 90 km away
  38. 2.28 km SE of Huron, California · 14406 days ago · 7 km deep · 88 km away
  39. 1.89 km E of Coalinga, California · 14405 days ago · 5 km deep · 73 km away
  40. 2.214 km ESE of Cantua Creek, California · 14405 days ago · 10 km deep · 67 km away
  41. 2.711 km NW of Parkfield, California · 14405 days ago · 11 km deep · 71 km away
  42. 2.65 km NNE of Coalinga, California · 14404 days ago · 15 km deep · 64 km away
  43. 1.621 km SE of Big Sur, California · 14404 days ago · 10 km deep · 76 km away
  44. 2.85 km NNE of Tres Pinos, California · 14403 days ago · 8 km deep · 49 km away
  45. 1.811 km SW of Huron, California · 14403 days ago · 8 km deep · 78 km away
  46. 1.94 km S of San Juan Bautista, California · 14403 days ago · 7 km deep · 64 km away
  47. 1.8Central California · 14403 days ago · 17 km deep · 34 km away
  48. 1.8Central California · 14403 days ago · 7 km deep · 53 km away
  49. 4.15 km NNE of Tres Pinos, California · 14403 days ago · 8 km deep · 48 km away
  50. 1.94 km NE of Tres Pinos, California · 14402 days ago · 7 km deep · 48 km away
  51. 3.15 km NNE of Tres Pinos, California · 14402 days ago · 8 km deep · 48 km away
  52. 2.810 km N of Coalinga, California · 14402 days ago · 11 km deep · 59 km away
  53. 1.913 km NW of Avenal, California · 14401 days ago · 5 km deep · 78 km away
  54. 1.618 km SSE of Tres Pinos, California · 14401 days ago · 6 km deep · 33 km away
  55. 1.94 km NE of Tres Pinos, California · 14401 days ago · 8 km deep · 47 km away
  56. 2.05 km NNE of Tres Pinos, California · 14401 days ago · 8 km deep · 48 km away
  57. 1.65 km SW of Gilroy, California · 14400 days ago · 3 km deep · 79 km away
  58. 2.34 km SSE of San Juan Bautista, California · 14400 days ago · 7 km deep · 63 km away
  59. 2.016 km NW of Parkfield, California · 14400 days ago · 4 km deep · 66 km away
  60. 1.823 km ENE of Soledad, California · 14399 days ago · 6 km deep · 15 km away

The first 60 of 144.

Before

  1. 1.66 km NNE of Tres Pinos, California · 14421 days ago · 4 km deep · 50 km away
  2. 1.724 km NE of Greenfield, California · 14422 days ago · 5 km deep · 14 km away
  3. 1.718 km NNW of Coalinga, California · 14424 days ago · 9 km deep · 50 km away
  4. 1.523 km NE of Greenfield, California · 14425 days ago · 10 km deep · 14 km away
  5. 2.723 km ENE of Soledad, California · 14425 days ago · 5 km deep · 16 km away
  6. 2.09 km SSW of Tres Pinos, California · 14425 days ago · 3 km deep · 45 km away
  7. 1.524 km NE of Greenfield, California · 14426 days ago · 6 km deep · 13 km away
  8. 2.017 km NNE of Coalinga, California · 14426 days ago · 6 km deep · 59 km away
  9. 2.017 km NNE of Coalinga, California · 14426 days ago · 6 km deep · 61 km away
  10. 2.316 km N of Coalinga, California · 14427 days ago · 5 km deep · 57 km away
  11. 1.8Central California · 14427 days ago · 6 km deep · 59 km away
  12. 2.117 km NNE of Coalinga, California · 14427 days ago · 6 km deep · 61 km away
  13. 2.610 km S of Tres Pinos, California · 14427 days ago · 4 km deep · 43 km away
  14. 2.910 km S of Tres Pinos, California · 14427 days ago · 4 km deep · 42 km away
  15. 2.324 km NE of Greenfield, California · 14428 days ago · 2 km deep · 13 km away
  16. 2.47 km SW of Huron, California · 14429 days ago · 8 km deep · 78 km away
  17. 1.89 km E of Coalinga, California · 14430 days ago · 11 km deep · 73 km away
  18. 2.29 km E of Coalinga, California · 14430 days ago · 11 km deep · 73 km away
  19. 1.66 km ENE of Hollister, California · 14430 days ago · 9 km deep · 55 km away
  20. 1.86 km S of Tres Pinos, California · 14430 days ago · 8 km deep · 43 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc98433. Read Mon, Oct 5, 2026, 7:26 AM UTC.