California earthquakes

M1.6 earthquake 24 km NE of Greenfield, California

A magnitude 1.6 earthquake struck 24 km NE of Greenfield, California on Mon, Mar 23, 1987, 12:18 AM PST (08:18 UTC), 6 km (3 mi) below the surface.

A larger quake followed: M2.6 8 km NE of Avenal, 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.6 (md), micro
Local time
UTC
1987-03-23 08:18:07 UTC
Depth
5.5 km (3.4 mi), shallow
Epicenter
36.468° N, 121.043° 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, 0.6 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
114°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 138 in the 60 days after this one and 48 in the 30 days before it.

After

  1. 2.68 km NE of Avenal, California · 14428 days ago · 8 km deep · 99 km away
  2. 3.77 km NE of Avenal, California · 14428 days ago · 8 km deep · 99 km away
  3. 1.68 km N of Coalinga, California · 14428 days ago · 12 km deep · 68 km away
  4. 1.92 km NNE of Aromas, California · 14426 days ago · 6 km deep · 72 km away
  5. 1.52 km N of Aromas, California · 14426 days ago · 6 km deep · 72 km away
  6. 2.1Central California · 14426 days ago · 5 km deep · 27 km away
  7. 1.622 km NE of Soledad, California · 14425 days ago · 4 km deep · 11 km away
  8. 2.48 km ENE of San Martin, California · 14424 days ago · 8 km deep · 85 km away
  9. 1.72 km E of Big Sur, California · 14424 days ago · 15 km deep · 69 km away
  10. 1.611 km NW of Parkfield, California · 14424 days ago · 11 km deep · 72 km away
  11. 1.622 km SE of Tres Pinos, California · 14422 days ago · 8 km deep · 21 km away
  12. 2.416 km NNW of Coalinga, California · 14422 days ago · 10 km deep · 61 km away
  13. 1.76 km NNE of Tres Pinos, California · 14422 days ago · 4 km deep · 48 km away
  14. 1.61 km ESE of Tres Pinos, California · 14421 days ago · 8 km deep · 42 km away
  15. 1.94 km ESE of Interlaken, California · 14420 days ago · 10 km deep · 77 km away
  16. 1.55 km N of San Ardo, California · 14420 days ago · 6 km deep · 46 km away
  17. 1.85 km NNE of Tres Pinos, California · 14418 days ago · 7 km deep · 46 km away
  18. 2.0Central California · 14418 days ago · 17 km deep · 84 km away
  19. 1.59 km NE of Coalinga, California · 14418 days ago · 13 km deep · 72 km away
  20. 1.86 km S of Tres Pinos, California · 14417 days ago · 8 km deep · 38 km away
  21. 1.66 km ENE of Hollister, California · 14417 days ago · 9 km deep · 53 km away
  22. 2.29 km E of Coalinga, California · 14417 days ago · 11 km deep · 80 km away
  23. 1.89 km E of Coalinga, California · 14417 days ago · 11 km deep · 80 km away
  24. 2.47 km SW of Huron, California · 14416 days ago · 8 km deep · 85 km away
  25. 2.324 km NE of Greenfield, California · 14416 days ago · 2 km deep · 1 km away
  26. 2.910 km S of Tres Pinos, California · 14415 days ago · 4 km deep · 36 km away
  27. 2.610 km S of Tres Pinos, California · 14415 days ago · 4 km deep · 37 km away
  28. 2.117 km NNE of Coalinga, California · 14414 days ago · 6 km deep · 70 km away
  29. 1.8Central California · 14414 days ago · 6 km deep · 68 km away
  30. 2.316 km N of Coalinga, California · 14414 days ago · 5 km deep · 66 km away
  31. 2.017 km NNE of Coalinga, California · 14414 days ago · 6 km deep · 70 km away
  32. 2.017 km NNE of Coalinga, California · 14414 days ago · 6 km deep · 68 km away
  33. 1.524 km NE of Greenfield, California · 14413 days ago · 6 km deep · 0 km away
  34. 2.09 km SSW of Tres Pinos, California · 14413 days ago · 3 km deep · 39 km away
  35. 2.723 km ENE of Soledad, California · 14412 days ago · 5 km deep · 7 km away
  36. 1.523 km NE of Greenfield, California · 14412 days ago · 10 km deep · 1 km away
  37. 1.718 km NNW of Coalinga, California · 14412 days ago · 9 km deep · 58 km away
  38. 1.724 km NE of Greenfield, California · 14409 days ago · 5 km deep · 0 km away
  39. 1.66 km NNE of Tres Pinos, California · 14408 days ago · 4 km deep · 48 km away
  40. 1.737 km NE of Greenfield, California · 14408 days ago · 13 km deep · 13 km away
  41. 2.715 km NW of Parkfield, California · 14407 days ago · 5 km deep · 68 km away
  42. 1.925 km NE of King City, California · 14407 days ago · 1 km deep · 10 km away
  43. 3.02 km W of Hollister, California · 14407 days ago · 5 km deep · 55 km away
  44. 2.29 km NNW of Coalinga, California · 14407 days ago · 6 km deep · 63 km away
  45. 3.111 km SW of Lake Nacimiento, California · 14406 days ago · 4 km deep · 92 km away
  46. 1.6Central California · 14406 days ago · 9 km deep · 11 km away
  47. 2.09 km NNE of Coalinga, California · 14405 days ago · 9 km deep · 72 km away
  48. 2.122 km ENE of Soledad, California · 14404 days ago · 8 km deep · 9 km away
  49. 1.85 km ENE of Hollister, California · 14403 days ago · 7 km deep · 53 km away
  50. 1.622 km ENE of San Ardo, California · 14403 days ago · 3 km deep · 52 km away
  51. 1.623 km NE of San Ardo, California · 14402 days ago · 7 km deep · 40 km away
  52. 3.128 km SE of Tres Pinos, California · 14402 days ago · 8 km deep · 16 km away
  53. 3.022 km NE of San Lucas, California · 14402 days ago · 9 km deep · 30 km away
  54. 2.822 km NE of San Lucas, California · 14402 days ago · 9 km deep · 30 km away
  55. 1.721 km NE of San Lucas, California · 14402 days ago · 8 km deep · 31 km away
  56. 2.822 km NE of San Lucas, California · 14402 days ago · 9 km deep · 30 km away
  57. 1.621 km NE of San Lucas, California · 14402 days ago · 7 km deep · 30 km away
  58. 1.95 km NNE of Coalinga, California · 14401 days ago · 8 km deep · 72 km away
  59. 1.617 km NNE of Soledad, California · 14401 days ago · 11 km deep · 22 km away
  60. 2.01 km W of Tres Pinos, California · 14401 days ago · 4 km deep · 44 km away

The first 60 of 138.

Before

  1. 2.124 km NE of Greenfield, California · 14429 days ago · 5 km deep · 0 km away
  2. 1.98 km NW of Avenal, California · 14429 days ago · 13 km deep · 88 km away
  3. 1.615 km NW of Parkfield, California · 14429 days ago · 3 km deep · 68 km away
  4. 1.815 km NNW of Coalinga, California · 14429 days ago · 9 km deep · 61 km away
  5. 1.910 km NNE of Avenal, California · 14430 days ago · 10 km deep · 97 km away
  6. 1.66 km NE of Interlaken, California · 14431 days ago · 10 km deep · 81 km away
  7. 2.04 km NNE of Coalinga, California · 14431 days ago · 12 km deep · 70 km away
  8. 2.910 km NNW of Hollister, California · 14431 days ago · 2 km deep · 64 km away
  9. 1.820 km SSE of Tres Pinos, California · 14431 days ago · 5 km deep · 24 km away
  10. 1.623 km NE of King City, California · 14431 days ago · 6 km deep · 12 km away
  11. 1.916 km S of Three Rocks, California · 14431 days ago · 12 km deep · 58 km away
  12. 2.710 km SW of Ridgemark, California · 14432 days ago · 8 km deep · 48 km away
  13. 1.66 km ENE of Hollister, California · 14432 days ago · 6 km deep · 53 km away
  14. 1.820 km SSE of Tres Pinos, California · 14432 days ago · 5 km deep · 24 km away
  15. 2.116 km N of Coalinga, California · 14432 days ago · 10 km deep · 67 km away
  16. 2.07 km N of Coalinga, California · 14433 days ago · 10 km deep · 69 km away
  17. 1.76 km N of Coalinga, California · 14433 days ago · 11 km deep · 69 km away
  18. 1.96 km N of Coalinga, California · 14433 days ago · 11 km deep · 69 km away
  19. 1.85 km NNE of Tres Pinos, California · 14433 days ago · 6 km deep · 47 km away
  20. 2.522 km NE of Soledad, California · 14433 days ago · 5 km deep · 18 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc97261. Read Tue, Sep 22, 2026, 4:54 PM UTC.