California earthquakes

M1.6 earthquake 24 km ENE of Greenfield, California

A magnitude 1.6 earthquake struck 24 km ENE of Greenfield, California on Mon, Dec 31, 1984, 4:47 PM PST (00:47 UTC), 6 km (3 mi) below the surface.

A larger quake followed: M3.8 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1985-01-01 00:47:31 UTC
Depth
5.6 km (3.5 mi), shallow
Epicenter
36.437° N, 121.013° 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, 1.0 km in depth
Magnitude uncertainty
±0.19
Depth from
From location
Station coverage gap
74°
Stations used
29

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 191 in the 60 days after this one and 91 in the 30 days before it.

After

  1. 1.941 km W of Lockwood, CA · 15248 days ago · 10 km deep · 71 km away
  2. 3.37 km NE of Coalinga, California · 15248 days ago · 11 km deep · 69 km away
  3. 3.17 km NE of Coalinga, California · 15248 days ago · 10 km deep · 69 km away
  4. 3.87 km NE of Coalinga, California · 15248 days ago · 11 km deep · 69 km away
  5. 1.87 km NE of Coalinga, California · 15248 days ago · 11 km deep · 69 km away
  6. 1.87 km N of Coalinga, California · 15248 days ago · 12 km deep · 65 km away
  7. 2.47 km NE of Coalinga, California · 15248 days ago · 10 km deep · 70 km away
  8. 1.711 km ENE of Coalinga, California · 15248 days ago · 9 km deep · 76 km away
  9. 1.625 km W of Three Rocks, California · 15248 days ago · 0 km deep · 31 km away
  10. 1.65 km E of Coalinga, California · 15247 days ago · 14 km deep · 72 km away
  11. 1.939 km ENE of Soledad, California · 15247 days ago · 6 km deep · 17 km away
  12. 3.00 km WSW of Parkfield, California · 15247 days ago · 5 km deep · 79 km away
  13. 1.69 km ENE of Coalinga, California · 15247 days ago · 10 km deep · 72 km away
  14. 1.511 km ENE of Coalinga, California · 15246 days ago · 10 km deep · 75 km away
  15. 2.424 km NE of King City, California · 15246 days ago · 10 km deep · 10 km away
  16. 1.524 km WNW of Three Rocks, California · 15246 days ago · 7 km deep · 38 km away
  17. 1.811 km NNW of Coalinga, California · 15245 days ago · 11 km deep · 60 km away
  18. 3.522 km NNE of Soledad, California · 15245 days ago · 9 km deep · 26 km away
  19. 1.612 km W of Oak Shores, California · 15244 days ago · 5 km deep · 73 km away
  20. 2.423 km NE of King City, California · 15244 days ago · 6 km deep · 7 km away
  21. 2.124 km NE of Greenfield, California · 15244 days ago · 5 km deep · 5 km away
  22. 1.822 km NNE of Soledad, California · 15243 days ago · 8 km deep · 25 km away
  23. 2.422 km NNE of Soledad, California · 15243 days ago · 8 km deep · 25 km away
  24. 1.625 km ENE of Greenfield, California · 15243 days ago · 2 km deep · 1 km away
  25. 1.624 km ENE of Greenfield, California · 15243 days ago · 2 km deep · 1 km away
  26. 1.612 km NNW of Coalinga, California · 15243 days ago · 11 km deep · 58 km away
  27. 1.523 km NE of King City, California · 15243 days ago · 5 km deep · 8 km away
  28. 1.910 km NE of Coalinga, California · 15242 days ago · 5 km deep · 70 km away
  29. 2.6Central California · 15241 days ago · 7 km deep · 79 km away
  30. 2.4Central California · 15241 days ago · 10 km deep · 75 km away
  31. 2.3Central California · 15241 days ago · 4 km deep · 52 km away
  32. 2.127 km ENE of San Lucas, California · 15241 days ago · 9 km deep · 31 km away
  33. 1.712 km NNW of Coalinga, California · 15241 days ago · 5 km deep · 57 km away
  34. 2.414 km NNW of Coalinga, California · 15240 days ago · 2 km deep · 55 km away
  35. 1.819 km NW of San Simeon, California · 15240 days ago · 9 km deep · 81 km away
  36. 1.623 km NE of King City, California · 15239 days ago · 6 km deep · 7 km away
  37. 1.814 km N of Coalinga, California · 15238 days ago · 8 km deep · 60 km away
  38. 1.9Central California · 15237 days ago · 10 km deep · 75 km away
  39. 2.414 km NW of Coalinga, California · 15237 days ago · 4 km deep · 54 km away
  40. 1.716 km N of Coalinga, California · 15237 days ago · 9 km deep · 59 km away
  41. 2.215 km NW of Coalinga, California · 15237 days ago · 2 km deep · 53 km away
  42. 2.014 km NNE of Coalinga, California · 15236 days ago · 9 km deep · 64 km away
  43. 2.122 km NNE of Soledad, California · 15236 days ago · 8 km deep · 25 km away
  44. 1.721 km NNE of Soledad, California · 15235 days ago · 8 km deep · 25 km away
  45. 1.56 km WSW of Gilroy, California · 15235 days ago · 5 km deep · 82 km away
  46. 2.112 km NW of Coalinga, California · 15235 days ago · 2 km deep · 56 km away
  47. 1.85 km SW of Gilroy, California · 15235 days ago · 5 km deep · 81 km away
  48. 2.324 km NE of Greenfield, California · 15233 days ago · 7 km deep · 4 km away
  49. 1.812 km NNW of Coalinga, California · 15233 days ago · 11 km deep · 57 km away
  50. 1.86 km NE of Coalinga, California · 15232 days ago · 7 km deep · 70 km away
  51. 1.623 km ENE of San Lucas, California · 15231 days ago · 5 km deep · 31 km away
  52. 1.811 km W of Avenal, California · 15230 days ago · 8 km deep · 84 km away
  53. 1.623 km NE of King City, California · 15230 days ago · 6 km deep · 7 km away
  54. 2.619 km SE of Tres Pinos, California · 15229 days ago · 5 km deep · 28 km away
  55. 2.220 km SE of Tres Pinos, California · 15229 days ago · 5 km deep · 28 km away
  56. 1.720 km SE of Tres Pinos, California · 15229 days ago · 5 km deep · 28 km away
  57. 1.610 km ENE of Tres Pinos, California · 15229 days ago · 7 km deep · 46 km away
  58. 1.516 km S of Three Rocks, California · 15229 days ago · 15 km deep · 58 km away
  59. 1.619 km S of Cantua Creek, California · 15229 days ago · 14 km deep · 62 km away
  60. 1.619 km SSE of Tres Pinos, California · 15228 days ago · 5 km deep · 28 km away

The first 60 of 191.

Before

  1. 2.48 km ENE of Morgan Hill, California · 15251 days ago · 2 km deep · 94 km away
  2. 1.710 km SW of Carmel Valley Village, California · 15251 days ago · 7 km deep · 74 km away
  3. 1.81 km E of Aromas, California · 15252 days ago · 8 km deep · 74 km away
  4. 1.716 km NNW of Coalinga, California · 15253 days ago · 8 km deep · 57 km away
  5. 1.912 km NW of Coalinga, California · 15253 days ago · 3 km deep · 55 km away
  6. 2.611 km NW of Coalinga, California · 15253 days ago · 5 km deep · 56 km away
  7. 2.114 km N of Coalinga, California · 15254 days ago · 9 km deep · 62 km away
  8. 2.26 km NE of Interlaken, California · 15254 days ago · 10 km deep · 85 km away
  9. 1.92 km SW of San Juan Bautista, California · 15255 days ago · 6 km deep · 66 km away
  10. 1.99 km SSW of Oak Shores, California · 15256 days ago · 5 km deep · 83 km away
  11. 1.611 km ENE of Coalinga, California · 15256 days ago · 10 km deep · 75 km away
  12. 2.18 km NE of Coalinga, California · 15257 days ago · 8 km deep · 69 km away
  13. 2.23 km N of Hollister, California · 15257 days ago · 9 km deep · 61 km away
  14. 1.920 km SW of Three Rocks, California · 15257 days ago · 13 km deep · 41 km away
  15. 1.69 km SSW of Oak Shores, California · 15257 days ago · 5 km deep · 83 km away
  16. 2.2Central California · 15257 days ago · 10 km deep · 63 km away
  17. 2.19 km SSW of Oak Shores, California · 15257 days ago · 5 km deep · 83 km away
  18. 1.59 km SSW of Oak Shores, California · 15258 days ago · 4 km deep · 83 km away
  19. 1.520 km NW of Parkfield, California · 15258 days ago · 8 km deep · 59 km away
  20. 1.540 km NE of Greenfield, California · 15258 days ago · 4 km deep · 16 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc36057. Read Sat, Oct 3, 2026, 8:55 AM UTC.