California earthquakes

M1.8 earthquake Central California

A magnitude 1.8 earthquake struck in Central California on Thu, Apr 30, 1987, 1:07 AM PDT (08:07 UTC), 17 km (10 mi) below the surface.

A larger quake followed: M4.1 5 km NNE of Tres Pinos, 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
1987-04-30 08:07:05 UTC
Depth
16.8 km (10.4 mi), shallow
Epicenter
36.269° N, 120.702° 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, 0.9 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
85°
Stations used
39

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 133 in the 60 days after this one and 70 in the 30 days before it.

After

  1. 1.8Central California · 14397 days ago · 7 km deep · 86 km away
  2. 4.15 km NNE of Tres Pinos, California · 14397 days ago · 8 km deep · 82 km away
  3. 1.94 km NE of Tres Pinos, California · 14397 days ago · 7 km deep · 81 km away
  4. 3.15 km NNE of Tres Pinos, California · 14396 days ago · 8 km deep · 82 km away
  5. 2.810 km N of Coalinga, California · 14396 days ago · 11 km deep · 31 km away
  6. 1.913 km NW of Avenal, California · 14395 days ago · 5 km deep · 47 km away
  7. 1.618 km SSE of Tres Pinos, California · 14395 days ago · 6 km deep · 64 km away
  8. 1.94 km NE of Tres Pinos, California · 14395 days ago · 8 km deep · 81 km away
  9. 2.05 km NNE of Tres Pinos, California · 14395 days ago · 8 km deep · 82 km away
  10. 2.34 km SSE of San Juan Bautista, California · 14394 days ago · 7 km deep · 95 km away
  11. 2.016 km NW of Parkfield, California · 14394 days ago · 4 km deep · 32 km away
  12. 1.823 km ENE of Soledad, California · 14394 days ago · 6 km deep · 42 km away
  13. 1.80 km SW of San Simeon, California · 14393 days ago · 7 km deep · 83 km away
  14. 1.615 km NW of Parkfield, California · 14393 days ago · 5 km deep · 33 km away
  15. 1.622 km SSE of Tres Pinos, California · 14393 days ago · 4 km deep · 58 km away
  16. 2.125 km SSE of Avenal, California · 14393 days ago · 10 km deep · 80 km away
  17. 2.425 km S of Kettleman City, California · 14393 days ago · 10 km deep · 85 km away
  18. 1.623 km ENE of Soledad, California · 14393 days ago · 4 km deep · 43 km away
  19. 1.923 km ENE of Soledad, California · 14392 days ago · 4 km deep · 43 km away
  20. 2.310 km NE of San Simeon, California · 14392 days ago · 5 km deep · 73 km away
  21. 1.618 km SSE of Tres Pinos, California · 14390 days ago · 6 km deep · 64 km away
  22. 1.65 km NW of Parkfield, CA · 14390 days ago · 4 km deep · 43 km away
  23. 2.29 km SE of San Juan Bautista, California · 14390 days ago · 7 km deep · 89 km away
  24. 1.622 km NNE of Soledad, California · 14389 days ago · 6 km deep · 58 km away
  25. 2.35 km NW of Parkfield, California · 14388 days ago · 5 km deep · 43 km away
  26. 1.811 km SW of Huron, California · 14388 days ago · 9 km deep · 48 km away
  27. 1.614 km N of Coalinga, California · 14387 days ago · 10 km deep · 28 km away
  28. 1.96 km ENE of Avenal, California · 14387 days ago · 10 km deep · 64 km away
  29. 1.521 km NE of Soledad, California · 14387 days ago · 2 km deep · 56 km away
  30. 2.310 km S of Huron, California · 14387 days ago · 8 km deep · 57 km away
  31. 2.018 km WSW of Mendota, California · 14386 days ago · 1 km deep · 51 km away
  32. 2.421 km NE of Soledad, California · 14386 days ago · 2 km deep · 50 km away
  33. 2.14 km NE of Tres Pinos, California · 14386 days ago · 7 km deep · 81 km away
  34. 1.819 km SSE of Tres Pinos, California · 14385 days ago · 4 km deep · 62 km away
  35. 1.714 km N of Coalinga, California · 14385 days ago · 9 km deep · 30 km away
  36. 1.9Central California · 14385 days ago · 1 km deep · 94 km away
  37. 1.713 km N of Hollister, California · 14385 days ago · 6 km deep · 98 km away
  38. 1.617 km SSE of Tres Pinos, California · 14384 days ago · 4 km deep · 65 km away
  39. 2.810 km E of Coalinga, California · 14382 days ago · 10 km deep · 44 km away
  40. 1.817 km SSE of Tres Pinos, California · 14381 days ago · 4 km deep · 65 km away
  41. 2.12 km ESE of San Ardo, California · 14380 days ago · 11 km deep · 33 km away
  42. 2.220 km W of Lockwood, California · 14379 days ago · 2 km deep · 66 km away
  43. 1.723 km NW of Parkfield, California · 14379 days ago · 6 km deep · 25 km away
  44. 1.923 km ENE of Soledad, California · 14379 days ago · 4 km deep · 42 km away
  45. 2.324 km NW of Parkfield, California · 14378 days ago · 0 km deep · 25 km away
  46. 1.718 km SSE of Tres Pinos, California · 14378 days ago · 10 km deep · 64 km away
  47. 1.74 km NE of Avenal, California · 14376 days ago · 9 km deep · 60 km away
  48. 1.518 km SSE of Tres Pinos, California · 14376 days ago · 10 km deep · 64 km away
  49. 1.6Central California · 14376 days ago · 3 km deep · 36 km away
  50. 1.510 km NE of Coalinga, California · 14376 days ago · 11 km deep · 40 km away
  51. 1.79 km N of Coalinga, California · 14376 days ago · 9 km deep · 31 km away
  52. 1.818 km NNW of Coalinga, California · 14374 days ago · 10 km deep · 22 km away
  53. 2.622 km NE of Soledad, California · 14374 days ago · 4 km deep · 56 km away
  54. 1.92 km WNW of Avenal, California · 14374 days ago · 15 km deep · 57 km away
  55. 1.724 km NE of King City, California · 14372 days ago · 6 km deep · 25 km away
  56. 1.88 km ENE of Coalinga, California · 14372 days ago · 11 km deep · 40 km away
  57. 1.521 km NE of Soledad, California · 14371 days ago · 6 km deep · 54 km away
  58. 2.05 km SE of Tres Pinos, California · 14371 days ago · 7 km deep · 75 km away
  59. 1.62 km ESE of San Ardo, California · 14370 days ago · 10 km deep · 33 km away
  60. 1.623 km ENE of Soledad, California · 14370 days ago · 5 km deep · 44 km away

The first 60 of 133.

Before

  1. 1.94 km S of San Juan Bautista, California · 14397 days ago · 7 km deep · 95 km away
  2. 1.811 km SW of Huron, California · 14397 days ago · 8 km deep · 48 km away
  3. 2.85 km NNE of Tres Pinos, California · 14398 days ago · 8 km deep · 82 km away
  4. 1.621 km SE of Big Sur, California · 14398 days ago · 10 km deep · 84 km away
  5. 2.65 km NNE of Coalinga, California · 14398 days ago · 15 km deep · 34 km away
  6. 2.711 km NW of Parkfield, California · 14399 days ago · 11 km deep · 37 km away
  7. 2.214 km ESE of Cantua Creek, California · 14399 days ago · 10 km deep · 53 km away
  8. 1.89 km E of Coalinga, California · 14400 days ago · 5 km deep · 43 km away
  9. 2.28 km SE of Huron, California · 14400 days ago · 7 km deep · 60 km away
  10. 2.025 km NE of Soledad, California · 14400 days ago · 9 km deep · 50 km away
  11. 2.421 km NW of Parkfield, California · 14400 days ago · 4 km deep · 27 km away
  12. 2.3Central California · 14401 days ago · 4 km deep · 96 km away
  13. 2.82 km SW of Ridgemark, California · 14401 days ago · 13 km deep · 85 km away
  14. 2.123 km NNE of San Lucas, California · 14403 days ago · 5 km deep · 16 km away
  15. 2.123 km NE of San Ardo, California · 14404 days ago · 7 km deep · 10 km away
  16. 2.221 km NNE of Soledad, California · 14405 days ago · 6 km deep · 57 km away
  17. 1.621 km NE of Soledad, California · 14405 days ago · 2 km deep · 53 km away
  18. 1.921 km NNE of Soledad, California · 14405 days ago · 6 km deep · 57 km away
  19. 1.935 km W of Lockwood, California · 14406 days ago · 11 km deep · 77 km away
  20. 1.75 km ENE of Hollister, California · 14407 days ago · 7 km deep · 89 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc99496. Read Tue, Sep 29, 2026, 10:00 AM UTC.