California earthquakes

M1.8 earthquake 1 km NW of Three Rocks, California

A magnitude 1.8 earthquake struck 1 km NW of Three Rocks, California on Tue, Sep 1, 1987, 1:26 PM PDT (20:26 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.8 22 km NE of San Ardo, 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
1987-09-01 20:26:19 UTC
Depth
4.9 km (3.1 mi), shallow
Epicenter
36.513° N, 120.403° 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 4.0 km horizontally, 7.0 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
262°, poorly surrounded by stations
Stations used
4

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 104 in the 60 days after this one and 63 in the 30 days before it.

After

  1. 1.67 km NE of Hollister, California · 14275 days ago · 6 km deep · 95 km away
  2. 2.218 km SSE of Tres Pinos, California · 14274 days ago · 6 km deep · 77 km away
  3. 1.823 km NNE of San Lucas, California · 14274 days ago · 6 km deep · 49 km away
  4. 2.017 km SSE of Tres Pinos, California · 14271 days ago · 4 km deep · 77 km away
  5. 1.63 km SSW of Hollister, California · 14269 days ago · 6 km deep · 97 km away
  6. 2.51 km ENE of Tres Pinos, California · 14268 days ago · 9 km deep · 87 km away
  7. 1.823 km NW of Parkfield, California · 14268 days ago · 6 km deep · 54 km away
  8. 1.823 km SE of Tres Pinos, California · 14267 days ago · 7 km deep · 69 km away
  9. 2.116 km SE of Tres Pinos, California · 14267 days ago · 7 km deep · 72 km away
  10. 1.524 km NE of Greenfield, California · 14267 days ago · 5 km deep · 59 km away
  11. 2.27 km NE of Ridgemark, California · 14266 days ago · 4 km deep · 89 km away
  12. 1.515 km NNE of Coalinga, California · 14265 days ago · 9 km deep · 29 km away
  13. 1.818 km SSE of Tres Pinos, California · 14265 days ago · 6 km deep · 76 km away
  14. 2.26 km SSW of Ridgemark, California · 14265 days ago · 9 km deep · 92 km away
  15. 1.78 km ESE of Coalinga, California · 14264 days ago · 9 km deep · 45 km away
  16. 2.024km SSE of Kettleman City, CA · 14264 days ago · 5 km deep · 92 km away
  17. 1.77 km NE of Ridgemark, California · 14264 days ago · 4 km deep · 89 km away
  18. 1.817 km SSE of Tres Pinos, California · 14263 days ago · 5 km deep · 77 km away
  19. 1.917 km NW of Parkfield, California · 14263 days ago · 5 km deep · 58 km away
  20. 2.921 km NE of Soledad, California · 14262 days ago · 2 km deep · 69 km away
  21. 3.412 km NNW of Kettleman City, California · 14261 days ago · 24 km deep · 57 km away
  22. 2.08 km SW of Stratford, California · 14261 days ago · 25 km deep · 63 km away
  23. 1.513 km NNE of Coalinga, California · 14261 days ago · 9 km deep · 29 km away
  24. 3.316 km NNW of Coalinga, California · 14261 days ago · 9 km deep · 26 km away
  25. 1.615 km SE of Tres Pinos, California · 14260 days ago · 10 km deep · 72 km away
  26. 1.715 km NNW of Coalinga, California · 14260 days ago · 9 km deep · 26 km away
  27. 1.55 km NE of Tres Pinos, California · 14259 days ago · 8 km deep · 85 km away
  28. 1.521 km SSW of Los Banos, California · 14259 days ago · 3 km deep · 64 km away
  29. 1.621 km SSW of Los Banos, California · 14259 days ago · 3 km deep · 64 km away
  30. 2.522 km SSW of Los Banos, California · 14259 days ago · 0 km deep · 65 km away
  31. 3.113 km N of Coalinga, California · 14258 days ago · 9 km deep · 28 km away
  32. 1.64 km NW of Parkfield, California · 14258 days ago · 5 km deep · 66 km away
  33. 1.94 km NW of Parkfield, California · 14258 days ago · 5 km deep · 66 km away
  34. 1.94 km NW of Parkfield, California · 14258 days ago · 5 km deep · 66 km away
  35. 2.24 km NW of Parkfield, California · 14257 days ago · 5 km deep · 66 km away
  36. 1.620 km SSE of Tres Pinos, California · 14257 days ago · 4 km deep · 74 km away
  37. 1.627 km SE of Tres Pinos, California · 14256 days ago · 8 km deep · 64 km away
  38. 1.613 km SSE of Tres Pinos, California · 14256 days ago · 3 km deep · 81 km away
  39. 2.56 km ENE of Hollister, California · 14256 days ago · 8 km deep · 93 km away
  40. 2.08 km ENE of Coalinga, California · 14256 days ago · 10 km deep · 39 km away
  41. 1.77 km S of Tres Pinos, California · 14255 days ago · 7 km deep · 85 km away
  42. 1.66 km ENE of Coalinga, California · 14255 days ago · 13 km deep · 40 km away
  43. 1.610 km NW of Parkfield, California · 14254 days ago · 7 km deep · 62 km away
  44. 2.222 km NNE of Soledad, California · 14252 days ago · 9 km deep · 73 km away
  45. 1.923 km NE of San Lucas, California · 14252 days ago · 7 km deep · 47 km away
  46. 2.310 km NW of Coalinga, California · 14249 days ago · 6 km deep · 33 km away
  47. 1.622 km NNE of Soledad, California · 14249 days ago · 6 km deep · 72 km away
  48. 1.616 km N of Coalinga, California · 14249 days ago · 11 km deep · 26 km away
  49. 1.614 km WNW of Coalinga, California · 14248 days ago · 6 km deep · 37 km away
  50. 2.06 km ENE of Hollister, California · 14248 days ago · 7 km deep · 93 km away
  51. 1.512 km NE of Shandon, California · 14247 days ago · 5 km deep · 86 km away
  52. 4.822 km NE of San Ardo, California · 14245 days ago · 27 km deep · 48 km away
  53. 1.55 km NNE of Coalinga, California · 14244 days ago · 13 km deep · 36 km away
  54. 1.86 km ENE of Hollister, California · 14244 days ago · 6 km deep · 92 km away
  55. 1.66 km SE of Tres Pinos, California · 14244 days ago · 5 km deep · 82 km away
  56. 1.823 km NE of King City, California · 14244 days ago · 7 km deep · 50 km away
  57. 2.423 km NE of Greenfield, California · 14244 days ago · 7 km deep · 58 km away
  58. 2.621 km NE of Soledad, California · 14243 days ago · 7 km deep · 68 km away
  59. 2.2Central California · 14243 days ago · 23 km deep · 94 km away
  60. 1.88 km NE of Coalinga, California · 14242 days ago · 10 km deep · 36 km away

The first 60 of 104.

Before

  1. 2.032 km WNW of Three Rocks, California · 14276 days ago · 7 km deep · 31 km away
  2. 1.92 km S of Oak Shores, California · 14276 days ago · 8 km deep · 100 km away
  3. 2.311 km SSW of Three Rocks, California · 14277 days ago · 10 km deep · 12 km away
  4. 2.9Central California · 14278 days ago · 6 km deep · 47 km away
  5. 1.7Central California · 14278 days ago · 11 km deep · 13 km away
  6. 1.512 km SW of Huron, California · 14278 days ago · 13 km deep · 48 km away
  7. 2.312 km NW of Parkfield, California · 14279 days ago · 10 km deep · 60 km away
  8. 2.09 km SE of Avenal, California · 14280 days ago · -1 km deep · 71 km away
  9. 1.518 km SW of Gustine, California · 14280 days ago · 0 km deep · 98 km away
  10. 2.38 km W of Huron, California · 14281 days ago · 15 km deep · 40 km away
  11. 1.912 km S of Tres Pinos, California · 14281 days ago · 3 km deep · 82 km away
  12. 1.62 km SW of Ridgemark, California · 14281 days ago · 8 km deep · 93 km away
  13. 2.38 km S of Huron, California · 14281 days ago · 6 km deep · 50 km away
  14. 2.810 km N of Coalinga, California · 14281 days ago · 10 km deep · 31 km away
  15. 2.023 km NE of San Lucas, California · 14281 days ago · 7 km deep · 47 km away
  16. 3.818 km SW of Gustine, California · 14281 days ago · 0 km deep · 97 km away
  17. 1.81 km WNW of Avenal, California · 14282 days ago · 13 km deep · 60 km away
  18. 2.62 km NW of Avenal, California · 14283 days ago · 15 km deep · 59 km away
  19. 2.022 km NNE of Soledad, California · 14284 days ago · 8 km deep · 73 km away
  20. 1.824 km NE of Greenfield, California · 14284 days ago · 6 km deep · 58 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1152399. Read Thu, Oct 1, 2026, 10:43 AM UTC.