California earthquakes

M2.1 earthquake 3 km NE of Three Rocks, California

A magnitude 2.1 earthquake struck 3 km NE of Three Rocks, California on Mon, Oct 22, 1984, 9:40 PM PDT (04:40 UTC), 17 km (10 mi) below the surface.

A larger quake followed: M3.3 10 km S of Huron, 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
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1984-10-23 04:40:39 UTC
Depth
16.8 km (10.4 mi), shallow
Epicenter
36.520° N, 120.363° 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, 1.0 km in depth
Magnitude uncertainty
±0.47
Depth from
From location
Station coverage gap
144°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 171 in the 60 days after this one and 90 in the 30 days before it.

After

  1. 1.624 km NE of Soledad, California · 15320 days ago · 7 km deep · 68 km away
  2. 2.59 km NE of Coalinga, California · 15319 days ago · 10 km deep · 38 km away
  3. 2.09 km ENE of Coalinga, California · 15319 days ago · 5 km deep · 40 km away
  4. 1.624 km NE of Greenfield, California · 15319 days ago · 5 km deep · 61 km away
  5. 1.823 km ENE of Soledad, California · 15318 days ago · 4 km deep · 65 km away
  6. 2.322 km NE of San Lucas, California · 15318 days ago · 6 km deep · 51 km away
  7. 2.619 km S of Cantua Creek, California · 15318 days ago · 4 km deep · 22 km away
  8. 1.718 km NNW of Coalinga, California · 15317 days ago · 9 km deep · 25 km away
  9. 1.824 km ENE of Soledad, California · 15317 days ago · 2 km deep · 63 km away
  10. 2.09 km ENE of Coalinga, California · 15317 days ago · 5 km deep · 40 km away
  11. 2.08 km NE of Coalinga, California · 15316 days ago · 11 km deep · 38 km away
  12. 1.98 km W of Avenal, California · 15314 days ago · 18 km deep · 58 km away
  13. 2.411 km E of Coalinga, California · 15313 days ago · 7 km deep · 46 km away
  14. 2.5Central California · 15313 days ago · 7 km deep · 46 km away
  15. 1.512 km ESE of Coalinga, California · 15313 days ago · 9 km deep · 47 km away
  16. 2.28 km W of Avenal, California · 15313 days ago · 17 km deep · 58 km away
  17. 2.215 km N of Coalinga, California · 15312 days ago · 8 km deep · 27 km away
  18. 2.012 km NE of Coalinga, California · 15311 days ago · 12 km deep · 33 km away
  19. 1.911 km S of Tres Pinos, California · 15311 days ago · 4 km deep · 87 km away
  20. 3.08 km NE of Hollister, California · 15311 days ago · 7 km deep · 98 km away
  21. 2.013 km N of Coalinga, California · 15310 days ago · 9 km deep · 28 km away
  22. 1.89 km S of Tres Pinos, California · 15309 days ago · 4 km deep · 89 km away
  23. 2.622 km NE of Soledad, California · 15309 days ago · 4 km deep · 73 km away
  24. 2.16 km NE of Coalinga, California · 15309 days ago · 9 km deep · 39 km away
  25. 2.47 km NNE of Coalinga, California · 15308 days ago · 10 km deep · 36 km away
  26. 3.121 km NE of Soledad, California · 15308 days ago · 3 km deep · 71 km away
  27. 2.210 km S of Tres Pinos, California · 15308 days ago · 3 km deep · 89 km away
  28. 1.925 km ENE of San Ardo, California · 15307 days ago · 2 km deep · 56 km away
  29. 2.025 km ENE of San Ardo, California · 15307 days ago · 2 km deep · 56 km away
  30. 1.86 km NE of Hollister, California · 15307 days ago · 4 km deep · 97 km away
  31. 1.622 km NE of Soledad, California · 15307 days ago · 7 km deep · 69 km away
  32. 2.121 km NE of Soledad, California · 15306 days ago · 6 km deep · 71 km away
  33. 1.724 km NE of Greenfield, California · 15305 days ago · 5 km deep · 60 km away
  34. 1.610 km NE of Coalinga, California · 15305 days ago · 6 km deep · 37 km away
  35. 2.925 km WNW of Three Rocks, California · 15304 days ago · 13 km deep · 28 km away
  36. 2.49 km NE of Hollister, California · 15304 days ago · 8 km deep · 97 km away
  37. 2.210 km S of Huron, California · 15304 days ago · 7 km deep · 52 km away
  38. 1.88 km NE of Hollister, California · 15303 days ago · 7 km deep · 98 km away
  39. 1.67 km NE of Coalinga, California · 15303 days ago · 10 km deep · 37 km away
  40. 2.311 km NE of Coalinga, California · 15301 days ago · 7 km deep · 34 km away
  41. 2.321 km NE of Soledad, California · 15301 days ago · 2 km deep · 69 km away
  42. 2.011 km E of Coalinga, California · 15301 days ago · 9 km deep · 43 km away
  43. 2.010 km NE of Coalinga, California · 15301 days ago · 8 km deep · 35 km away
  44. 2.221 km NE of Soledad, California · 15300 days ago · 5 km deep · 73 km away
  45. 2.321 km NE of Soledad, California · 15300 days ago · 5 km deep · 73 km away
  46. 1.631 km NE of Greenfield, California · 15300 days ago · 0 km deep · 54 km away
  47. 3.317 km NNW of Coalinga, California · 15300 days ago · 9 km deep · 26 km away
  48. 2.317 km NNW of Coalinga, California · 15299 days ago · 7 km deep · 26 km away
  49. 1.921 km NE of Soledad, California · 15299 days ago · 2 km deep · 71 km away
  50. 1.921 km NE of Soledad, California · 15299 days ago · 0 km deep · 72 km away
  51. 2.411 km N of Coalinga, California · 15298 days ago · 8 km deep · 31 km away
  52. 1.914 km NNW of Coalinga, California · 15297 days ago · 11 km deep · 30 km away
  53. 1.56 km W of Coalinga, California · 15297 days ago · 8 km deep · 43 km away
  54. 1.711 km NNE of Coalinga, California · 15295 days ago · 9 km deep · 32 km away
  55. 2.120 km S of Cantua Creek, California · 15294 days ago · 7 km deep · 23 km away
  56. 2.423 km NW of Parkfield, California · 15294 days ago · 9 km deep · 56 km away
  57. 1.69 km E of Coalinga, California · 15294 days ago · 8 km deep · 42 km away
  58. 1.810 km E of Coalinga, California · 15294 days ago · 7 km deep · 43 km away
  59. 1.816 km ESE of Tres Pinos, California · 15294 days ago · 6 km deep · 74 km away
  60. 1.716 km ESE of Tres Pinos, California · 15294 days ago · 3 km deep · 74 km away

The first 60 of 171.

Before

  1. 1.624 km NE of Greenfield, California · 15321 days ago · 2 km deep · 60 km away
  2. 1.913 km NNE of Coalinga, California · 15321 days ago · 9 km deep · 30 km away
  3. 2.021 km NNE of Soledad, California · 15321 days ago · 8 km deep · 75 km away
  4. 3.621 km NNE of Soledad, California · 15321 days ago · 9 km deep · 75 km away
  5. 2.314 km SSW of Fairmead, California · 15322 days ago · 7 km deep · 50 km away
  6. 2.016 km SSW of Fairmead, California · 15322 days ago · 3 km deep · 48 km away
  7. 2.522 km NNE of San Ardo, California · 15322 days ago · 5 km deep · 51 km away
  8. 1.88 km N of Coalinga, California · 15323 days ago · 10 km deep · 34 km away
  9. 3.023 km NE of San Lucas, California · 15323 days ago · 7 km deep · 50 km away
  10. 1.78 km SW of Tres Pinos, California · 15323 days ago · 3 km deep · 94 km away
  11. 1.819 km SSE of Avenal, California · 15323 days ago · 12 km deep · 80 km away
  12. 2.020 km SSE of Avenal, California · 15323 days ago · 9 km deep · 82 km away
  13. 2.18 km NE of Avenal, California · 15323 days ago · 23 km deep · 58 km away
  14. 2.19 km SE of San Joaquin, California · 15324 days ago · 20 km deep · 23 km away
  15. 1.621 km S of Avenal, California · 15324 days ago · 7 km deep · 81 km away
  16. 2.819 km S of Kettleman City, California · 15324 days ago · 9 km deep · 83 km away
  17. 2.0Central California · 15324 days ago · 2 km deep · 58 km away
  18. 1.813 km NNE of Coalinga, California · 15324 days ago · 9 km deep · 29 km away
  19. 1.622 km NE of San Lucas, California · 15324 days ago · 5 km deep · 52 km away
  20. 1.521 km NE of Soledad, California · 15325 days ago · 7 km deep · 74 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc30538. Read Sat, Oct 3, 2026, 11:37 AM UTC.