California earthquakes

M1.8 earthquake 32 km W of Three Rocks, California

A magnitude 1.8 earthquake struck 32 km W of Three Rocks, California on Thu, Apr 19, 1984, 7:39 PM PST (03:39 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.4 7 km NE of Coalinga, 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), micro
Local time
UTC
1984-04-20 03:39:44 UTC
Depth
9.6 km (6.0 mi), shallow
Epicenter
36.480° N, 120.757° 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 0.4 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.21
Depth from
From location
Station coverage gap
214°, poorly surrounded by stations
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 195 in the 60 days after this one and 128 in the 30 days before it.

After

  1. 1.821 km NE of Soledad, California · 15501 days ago · 6 km deep · 34 km away
  2. 1.515 km NW of Parkfield, California · 15501 days ago · 5 km deep · 57 km away
  3. 1.68 km NNE of Coalinga, California · 15501 days ago · 2 km deep · 50 km away
  4. 1.711 km ENE of Coalinga, California · 15501 days ago · 9 km deep · 57 km away
  5. 1.913 km WNW of Huron, California · 15501 days ago · 13 km deep · 53 km away
  6. 1.810 km NNW of Coalinga, California · 15500 days ago · 7 km deep · 43 km away
  7. 1.612 km W of Huron, California · 15500 days ago · 11 km deep · 55 km away
  8. 2.025 km NNE of King City, California · 15500 days ago · 1 km deep · 21 km away
  9. 2.412 km N of Coalinga, California · 15500 days ago · 9 km deep · 45 km away
  10. 2.016 km WNW of Coalinga, California · 15499 days ago · 8 km deep · 36 km away
  11. 2.46 km NNE of Coalinga, California · 15499 days ago · 8 km deep · 50 km away
  12. 1.511 km SW of Huron, California · 15499 days ago · 8 km deep · 63 km away
  13. 2.111 km S of Tres Pinos, California · 15499 days ago · 8 km deep · 55 km away
  14. 2.03 km ESE of Aromas, California · 15498 days ago · 6 km deep · 88 km away
  15. 1.53 km ESE of Aromas, California · 15498 days ago · 7 km deep · 88 km away
  16. 2.23 km ESE of Aromas, California · 15498 days ago · 7 km deep · 88 km away
  17. 4.07 km NE of Coalinga, California · 15498 days ago · 12 km deep · 53 km away
  18. 1.67 km NE of Coalinga, California · 15498 days ago · 7 km deep · 52 km away
  19. 1.68 km ENE of Coalinga, California · 15498 days ago · 3 km deep · 56 km away
  20. 2.36 km ENE of Coalinga, California · 15498 days ago · 7 km deep · 53 km away
  21. 1.65 km NNW of Coalinga, California · 15498 days ago · 2 km deep · 47 km away
  22. 1.58 km ENE of Coalinga, California · 15498 days ago · 6 km deep · 55 km away
  23. 1.98 km ENE of Coalinga, California · 15498 days ago · 5 km deep · 56 km away
  24. 2.011 km WSW of Huron, California · 15497 days ago · 9 km deep · 60 km away
  25. 1.616 km NNW of Coalinga, California · 15497 days ago · 7 km deep · 39 km away
  26. 1.815 km NNE of Coalinga, California · 15497 days ago · 5 km deep · 45 km away
  27. 1.515 km N of Coalinga, California · 15497 days ago · 7 km deep · 41 km away
  28. 1.514 km NNE of Coalinga, California · 15496 days ago · 0 km deep · 46 km away
  29. 1.721 km NE of Soledad, California · 15496 days ago · 6 km deep · 36 km away
  30. 3.021 km NE of Soledad, California · 15496 days ago · 7 km deep · 36 km away
  31. 1.721 km NE of Soledad, California · 15496 days ago · 6 km deep · 37 km away
  32. 1.814 km N of Coalinga, California · 15496 days ago · 9 km deep · 40 km away
  33. 1.96 km E of San Martin, California · 15495 days ago · 3 km deep · 98 km away
  34. 2.17 km NE of San Juan Bautista, California · 15495 days ago · 8 km deep · 79 km away
  35. 1.96 km NNW of Hollister, California · 15495 days ago · 3 km deep · 76 km away
  36. 3.58 km ENE of San Martin, California · 15495 days ago · 7 km deep · 99 km away
  37. 2.58 km ENE of San Martin, California · 15495 days ago · 7 km deep · 99 km away
  38. 1.512 km S of Tres Pinos, California · 15494 days ago · 8 km deep · 55 km away
  39. 1.626km S of South Dos Palos, CA · 15494 days ago · -1 km deep · 29 km away
  40. 3.08 km ENE of San Martin, California · 15494 days ago · 7 km deep · 99 km away
  41. 2.08 km ENE of San Martin, California · 15494 days ago · 6 km deep · 98 km away
  42. 1.635 km SSW of South Dos Palos, California · 15494 days ago · 0 km deep · 23 km away
  43. 1.927 km SSW of South Dos Palos, California · 15494 days ago · 0 km deep · 28 km away
  44. 2.113 km N of Coalinga, California · 15494 days ago · 9 km deep · 44 km away
  45. 1.67 km WSW of Gilroy, California · 15494 days ago · 4 km deep · 96 km away
  46. 1.88 km ENE of Coalinga, California · 15493 days ago · 6 km deep · 56 km away
  47. 1.816 km NNW of Coalinga, California · 15493 days ago · 11 km deep · 36 km away
  48. 2.18 km ENE of Coalinga, California · 15493 days ago · 7 km deep · 57 km away
  49. 2.012 km S of Tres Pinos, California · 15493 days ago · 3 km deep · 53 km away
  50. 1.724 km NE of Greenfield, California · 15492 days ago · 4 km deep · 26 km away
  51. 1.623 km ENE of Soledad, California · 15492 days ago · 5 km deep · 30 km away
  52. 1.611 km N of Coalinga, California · 15492 days ago · 7 km deep · 44 km away
  53. 1.819 km NW of Coalinga, California · 15492 days ago · 6 km deep · 32 km away
  54. 2.14 km ESE of Aromas, California · 15491 days ago · 5 km deep · 87 km away
  55. 1.75 km SSW of Gilroy, California · 15490 days ago · 6 km deep · 92 km away
  56. 1.739 km SSW of South Dos Palos, California · 15490 days ago · 0 km deep · 22 km away
  57. 3.09 km NNE of Coalinga, California · 15490 days ago · 9 km deep · 49 km away
  58. 1.916 km WSW of Lanare, California · 15490 days ago · 5 km deep · 61 km away
  59. 1.810 km NNW of Coalinga, California · 15490 days ago · 11 km deep · 42 km away
  60. 1.87 km SSE of San Juan Bautista, California · 15489 days ago · 7 km deep · 74 km away

The first 60 of 195.

Before

  1. 1.99 km W of Huron, California · 15502 days ago · 3 km deep · 57 km away
  2. 1.711 km NE of Coalinga, California · 15502 days ago · 5 km deep · 51 km away
  3. 1.79 km NE of Coalinga, California · 15504 days ago · 13 km deep · 54 km away
  4. 1.822 km NE of San Lucas, California · 15504 days ago · 7 km deep · 25 km away
  5. 1.93 km W of San Juan Bautista, California · 15505 days ago · 6 km deep · 83 km away
  6. 1.511 km E of Coalinga, California · 15505 days ago · 9 km deep · 59 km away
  7. 1.711 km WSW of Huron, California · 15505 days ago · 3 km deep · 58 km away
  8. 1.511 km WSW of Huron, California · 15506 days ago · 8 km deep · 62 km away
  9. 1.713 km SW of Huron, California · 15506 days ago · 3 km deep · 64 km away
  10. 1.613 km NW of Avenal, California · 15506 days ago · 1 km deep · 64 km away
  11. 1.824 km NE of King City, California · 15506 days ago · 1 km deep · 21 km away
  12. 1.812 km SSW of Carmel Valley Village, California · 15507 days ago · 8 km deep · 97 km away
  13. 1.711 km N of Coalinga, California · 15507 days ago · 7 km deep · 43 km away
  14. 2.210 km ENE of Coalinga, California · 15507 days ago · 0 km deep · 57 km away
  15. 1.916 km NNW of Coalinga, California · 15507 days ago · 4 km deep · 37 km away
  16. 1.69 km ENE of Coalinga, California · 15507 days ago · 4 km deep · 55 km away
  17. 2.54 km SE of Le Grand, California · 15508 days ago · 0 km deep · 93 km away
  18. 1.611 km WSW of Huron, California · 15508 days ago · 2 km deep · 58 km away
  19. 1.8Near the coast of Central California · 15508 days ago · 6 km deep · 85 km away
  20. 2.04 km E of Coalinga, California · 15508 days ago · 0 km deep · 55 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc15939. Read Mon, Sep 28, 2026, 7:11 PM UTC.