California earthquakes

M1.8 earthquake 24 km W of Three Rocks, California

A magnitude 1.8 earthquake struck 24 km W of Three Rocks, California on Tue, Sep 18, 1984, 6:01 AM PDT (13:01 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.0 21 km NE of Soledad, 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1984-09-18 13:01:20 UTC
Depth
10.2 km (6.3 mi), shallow
Epicenter
36.488° N, 120.666° 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, 0.7 km in depth
Magnitude uncertainty
±0.23
Depth from
From location
Station coverage gap
151°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 189 in the 60 days after this one and 94 in the 30 days before it.

After

  1. 2.212 km W of Oak Shores, California · 15353 days ago · 5 km deep · 88 km away
  2. 1.611 km ENE of Coalinga, California · 15352 days ago · 12 km deep · 51 km away
  3. 2.010 km S of Tres Pinos, California · 15352 days ago · 4 km deep · 63 km away
  4. 1.813 km W of Oak Shores, California · 15352 days ago · 5 km deep · 88 km away
  5. 1.521 km SSW of Three Rocks, California · 15352 days ago · 10 km deep · 23 km away
  6. 2.017 km SSE of Tres Pinos, California · 15352 days ago · 4 km deep · 55 km away
  7. 2.210 km E of Coalinga, California · 15352 days ago · 5 km deep · 54 km away
  8. 1.717 km NNW of San Simeon, California · 15352 days ago · 5 km deep · 94 km away
  9. 1.86 km NE of Coalinga, California · 15352 days ago · 4 km deep · 48 km away
  10. 1.612 km SW of Huron, California · 15351 days ago · 6 km deep · 59 km away
  11. 1.88 km SSW of Huron, California · 15351 days ago · 15 km deep · 61 km away
  12. 1.710 km NE of Gilroy, California · 15351 days ago · 8 km deep · 99 km away
  13. 1.611 km SW of Huron, California · 15351 days ago · 8 km deep · 57 km away
  14. 1.618 km NW of Parkfield, California · 15351 days ago · 5 km deep · 52 km away
  15. 1.523 km NNE of San Lucas, California · 15351 days ago · 4 km deep · 28 km away
  16. 1.810 km NE of Coalinga, California · 15350 days ago · 8 km deep · 46 km away
  17. 1.813 km NNE of Coalinga, California · 15350 days ago · 8 km deep · 41 km away
  18. 1.711 km NNE of Avenal, California · 15349 days ago · 8 km deep · 70 km away
  19. 3.18 km NNE of Coalinga, California · 15349 days ago · 10 km deep · 44 km away
  20. 2.88 km NNE of Coalinga, California · 15349 days ago · 10 km deep · 44 km away
  21. 1.57 km NNE of Coalinga, California · 15349 days ago · 11 km deep · 44 km away
  22. 2.00 km SSE of Gonzales, California · 15349 days ago · 9 km deep · 69 km away
  23. 1.521 km NE of Soledad, California · 15349 days ago · 7 km deep · 44 km away
  24. 1.519 km NNW of Coalinga, California · 15349 days ago · 8 km deep · 30 km away
  25. 1.737 km ESE of Tres Pinos, California · 15348 days ago · 5 km deep · 30 km away
  26. 1.718 km S of Three Rocks, California · 15348 days ago · 13 km deep · 32 km away
  27. 2.39 km NW of Hollister, California · 15348 days ago · 4 km deep · 86 km away
  28. 1.910 km ENE of Coalinga, California · 15348 days ago · 4 km deep · 51 km away
  29. 2.012 km SW of Soledad, California · 15348 days ago · 10 km deep · 70 km away
  30. 2.04 km ESE of Aromas, California · 15347 days ago · 5 km deep · 93 km away
  31. 1.65 km NW of Parkfield, California · 15347 days ago · 5 km deep · 64 km away
  32. 2.520 km NNE of Coalinga, California · 15346 days ago · 7 km deep · 39 km away
  33. 1.512 km SW of Huron, California · 15346 days ago · 5 km deep · 58 km away
  34. 1.914 km N of Coalinga, California · 15346 days ago · 8 km deep · 35 km away
  35. 1.6Central California · 15345 days ago · 12 km deep · 45 km away
  36. 1.823 km ENE of Soledad, California · 15345 days ago · 5 km deep · 37 km away
  37. 1.78 km NE of Coalinga, California · 15345 days ago · 9 km deep · 46 km away
  38. 2.110 km W of Huron, California · 15345 days ago · 6 km deep · 50 km away
  39. 2.09 km NE of Coalinga, California · 15345 days ago · 8 km deep · 47 km away
  40. 2.315 km SSE of Tres Pinos, California · 15345 days ago · 10 km deep · 58 km away
  41. 1.725 km NE of Greenfield, California · 15345 days ago · 1 km deep · 31 km away
  42. 1.99 km NE of Gilroy, California · 15344 days ago · 8 km deep · 96 km away
  43. 1.65 km W of Avenal, California · 15343 days ago · 14 km deep · 69 km away
  44. 1.625 km WSW of Lockwood, California · 15343 days ago · 8 km deep · 92 km away
  45. 2.54 km WSW of Avenal, California · 15343 days ago · 13 km deep · 70 km away
  46. 1.93 km WSW of Avenal, California · 15343 days ago · 15 km deep · 71 km away
  47. 3.44 km WSW of Avenal, California · 15343 days ago · 17 km deep · 70 km away
  48. 1.618 km ESE of Tres Pinos, California · 15343 days ago · 5 km deep · 49 km away
  49. 1.637 km W of Lockwood, California · 15342 days ago · 4 km deep · 95 km away
  50. 2.112 km NW of Avenal, California · 15342 days ago · 2 km deep · 60 km away
  51. 1.622 km NW of Parkfield, California · 15341 days ago · 1 km deep · 49 km away
  52. 1.69 km NE of Gilroy, California · 15340 days ago · 8 km deep · 97 km away
  53. 2.415 km NNW of Coalinga, California · 15340 days ago · 10 km deep · 33 km away
  54. 2.711 km N of Coalinga, California · 15339 days ago · 9 km deep · 38 km away
  55. 1.511 km N of Coalinga, California · 15339 days ago · 7 km deep · 37 km away
  56. 1.810 km S of Huron, California · 15339 days ago · 7 km deep · 67 km away
  57. 1.616 km NW of Parkfield, California · 15339 days ago · 4 km deep · 55 km away
  58. 1.55 km SSW of Gilroy, California · 15338 days ago · 3 km deep · 98 km away
  59. 1.622 km NE of Soledad, California · 15337 days ago · 2 km deep · 41 km away
  60. 1.611 km NNW of Coalinga, California · 15337 days ago · 7 km deep · 37 km away

The first 60 of 189.

Before

  1. 1.85 km NNE of Tres Pinos, California · 15354 days ago · 4 km deep · 69 km away
  2. 1.610 km S of Huron, California · 15354 days ago · 7 km deep · 67 km away
  3. 2.27 km NNE of Coalinga, California · 15354 days ago · 9 km deep · 43 km away
  4. 2.08 km SSW of Huron, California · 15354 days ago · 25 km deep · 60 km away
  5. 1.823 km NNE of San Lucas, California · 15354 days ago · 4 km deep · 28 km away
  6. 2.023 km NE of King City, California · 15355 days ago · 2 km deep · 28 km away
  7. 1.723 km NE of Soledad, California · 15355 days ago · 2 km deep · 41 km away
  8. 1.90 km S of Coalinga, California · 15355 days ago · 11 km deep · 48 km away
  9. 1.622 km NNE of Soledad, California · 15356 days ago · 3 km deep · 49 km away
  10. 2.523 km NE of King City, California · 15356 days ago · 6 km deep · 29 km away
  11. 1.615 km N of Coalinga, California · 15357 days ago · 9 km deep · 34 km away
  12. 1.96 km SSW of West Park, California · 15358 days ago · 8 km deep · 72 km away
  13. 1.69 km ENE of Coalinga, California · 15358 days ago · 8 km deep · 51 km away
  14. 2.010 km NE of Coalinga, California · 15359 days ago · 9 km deep · 47 km away
  15. 2.48 km S of Huron, California · 15361 days ago · 7 km deep · 65 km away
  16. 1.517 km S of Three Rocks, California · 15361 days ago · 11 km deep · 28 km away
  17. 1.816 km NW of Parkfield, California · 15361 days ago · 4 km deep · 55 km away
  18. 2.023 km NE of Soledad, California · 15361 days ago · 9 km deep · 42 km away
  19. 1.812 km W of Huron, California · 15361 days ago · 13 km deep · 50 km away
  20. 1.69 km N of Coalinga, California · 15362 days ago · 9 km deep · 40 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc28085. Read Thu, Oct 1, 2026, 9:05 PM UTC.