California earthquakes

M1.8 earthquake 4 km N of Coalinga, California

A magnitude 1.8 earthquake struck 4 km N of Coalinga, California on Mon, Apr 20, 1987, 2:57 AM PDT (09:57 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M1.9 21 km NNE of Soledad, California. This one was a foreshock.

Coalinga forecastMore in California

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
1987-04-20 09:57:06 UTC
Depth
11.8 km (7.3 mi), shallow
Epicenter
36.180° N, 120.351° 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, 0.4 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
69°
Stations used
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 105 in the 60 days after this one and 63 in the 30 days before it.

After

  1. 1.921 km NNE of Soledad, California · 14398 days ago · 6 km deep · 88 km away
  2. 1.621 km NE of Soledad, California · 14398 days ago · 2 km deep · 84 km away
  3. 2.221 km NNE of Soledad, California · 14398 days ago · 6 km deep · 88 km away
  4. 2.123 km NE of San Ardo, California · 14397 days ago · 7 km deep · 36 km away
  5. 2.123 km NNE of San Lucas, California · 14396 days ago · 5 km deep · 49 km away
  6. 2.421 km NW of Parkfield, California · 14394 days ago · 4 km deep · 27 km away
  7. 2.025 km NE of Soledad, California · 14393 days ago · 9 km deep · 81 km away
  8. 2.28 km SE of Huron, California · 14393 days ago · 7 km deep · 27 km away
  9. 1.89 km E of Coalinga, California · 14393 days ago · 5 km deep · 10 km away
  10. 2.214 km ESE of Cantua Creek, California · 14392 days ago · 10 km deep · 36 km away
  11. 2.711 km NW of Parkfield, California · 14392 days ago · 11 km deep · 28 km away
  12. 2.65 km NNE of Coalinga, California · 14391 days ago · 15 km deep · 1 km away
  13. 1.811 km SW of Huron, California · 14391 days ago · 8 km deep · 15 km away
  14. 1.8Central California · 14390 days ago · 17 km deep · 33 km away
  15. 2.810 km N of Coalinga, California · 14389 days ago · 11 km deep · 6 km away
  16. 1.913 km NW of Avenal, California · 14388 days ago · 5 km deep · 15 km away
  17. 1.618 km SSE of Tres Pinos, California · 14388 days ago · 6 km deep · 95 km away
  18. 2.016 km NW of Parkfield, California · 14387 days ago · 4 km deep · 27 km away
  19. 1.823 km ENE of Soledad, California · 14387 days ago · 6 km deep · 74 km away
  20. 1.80 km SW of San Simeon, California · 14386 days ago · 7 km deep · 97 km away
  21. 1.615 km NW of Parkfield, California · 14386 days ago · 5 km deep · 27 km away
  22. 1.622 km SSE of Tres Pinos, California · 14386 days ago · 4 km deep · 89 km away
  23. 2.125 km SSE of Avenal, California · 14386 days ago · 10 km deep · 52 km away
  24. 2.425 km S of Kettleman City, California · 14386 days ago · 10 km deep · 56 km away
  25. 1.623 km ENE of Soledad, California · 14386 days ago · 4 km deep · 75 km away
  26. 1.923 km ENE of Soledad, California · 14385 days ago · 4 km deep · 75 km away
  27. 2.310 km NE of San Simeon, California · 14385 days ago · 5 km deep · 86 km away
  28. 1.618 km SSE of Tres Pinos, California · 14383 days ago · 6 km deep · 95 km away
  29. 1.65 km NW of Parkfield, CA · 14383 days ago · 4 km deep · 30 km away
  30. 1.622 km NNE of Soledad, California · 14382 days ago · 6 km deep · 89 km away
  31. 2.35 km NW of Parkfield, California · 14381 days ago · 5 km deep · 30 km away
  32. 1.811 km SW of Huron, California · 14381 days ago · 9 km deep · 15 km away
  33. 1.614 km N of Coalinga, California · 14380 days ago · 10 km deep · 11 km away
  34. 1.96 km ENE of Avenal, California · 14380 days ago · 10 km deep · 32 km away
  35. 1.521 km NE of Soledad, California · 14380 days ago · 2 km deep · 87 km away
  36. 2.310 km S of Huron, California · 14380 days ago · 8 km deep · 24 km away
  37. 2.018 km WSW of Mendota, California · 14379 days ago · 1 km deep · 63 km away
  38. 2.421 km NE of Soledad, California · 14379 days ago · 2 km deep · 82 km away
  39. 1.819 km SSE of Tres Pinos, California · 14379 days ago · 4 km deep · 93 km away
  40. 1.714 km N of Coalinga, California · 14378 days ago · 9 km deep · 10 km away
  41. 1.617 km SSE of Tres Pinos, California · 14377 days ago · 4 km deep · 96 km away
  42. 2.810 km E of Coalinga, California · 14375 days ago · 10 km deep · 11 km away
  43. 1.817 km SSE of Tres Pinos, California · 14374 days ago · 4 km deep · 96 km away
  44. 2.12 km ESE of San Ardo, California · 14373 days ago · 11 km deep · 51 km away
  45. 2.220 km W of Lockwood, California · 14372 days ago · 2 km deep · 90 km away
  46. 1.723 km NW of Parkfield, California · 14372 days ago · 6 km deep · 27 km away
  47. 1.923 km ENE of Soledad, California · 14372 days ago · 4 km deep · 74 km away
  48. 2.324 km NW of Parkfield, California · 14371 days ago · 0 km deep · 28 km away
  49. 1.718 km SSE of Tres Pinos, California · 14371 days ago · 10 km deep · 95 km away
  50. 1.74 km NE of Avenal, California · 14369 days ago · 9 km deep · 28 km away
  51. 1.518 km SSE of Tres Pinos, California · 14369 days ago · 10 km deep · 95 km away
  52. 1.6Central California · 14369 days ago · 3 km deep · 14 km away
  53. 1.510 km NE of Coalinga, California · 14369 days ago · 11 km deep · 8 km away
  54. 1.79 km N of Coalinga, California · 14369 days ago · 9 km deep · 5 km away
  55. 1.818 km NNW of Coalinga, California · 14367 days ago · 10 km deep · 16 km away
  56. 2.622 km NE of Soledad, California · 14367 days ago · 4 km deep · 87 km away
  57. 1.92 km WNW of Avenal, California · 14367 days ago · 15 km deep · 26 km away
  58. 1.724 km NE of King City, California · 14365 days ago · 6 km deep · 57 km away
  59. 1.88 km ENE of Coalinga, California · 14365 days ago · 11 km deep · 7 km away
  60. 1.521 km NE of Soledad, California · 14364 days ago · 6 km deep · 85 km away

The first 60 of 105.

Before

  1. 1.524 km NE of Greenfield, California · 14400 days ago · 0 km deep · 70 km away
  2. 1.810 km ENE of Coalinga, California · 14400 days ago · 9 km deep · 9 km away
  3. 1.617 km NNE of Soledad, California · 14401 days ago · 11 km deep · 92 km away
  4. 1.95 km NNE of Coalinga, California · 14401 days ago · 8 km deep · 2 km away
  5. 1.621 km NE of San Lucas, California · 14402 days ago · 7 km deep · 44 km away
  6. 2.822 km NE of San Lucas, California · 14402 days ago · 9 km deep · 43 km away
  7. 1.721 km NE of San Lucas, California · 14402 days ago · 8 km deep · 44 km away
  8. 2.822 km NE of San Lucas, California · 14402 days ago · 9 km deep · 44 km away
  9. 3.022 km NE of San Lucas, California · 14402 days ago · 9 km deep · 44 km away
  10. 3.128 km SE of Tres Pinos, California · 14402 days ago · 8 km deep · 82 km away
  11. 1.623 km NE of San Ardo, California · 14402 days ago · 7 km deep · 36 km away
  12. 1.622 km ENE of San Ardo, California · 14403 days ago · 3 km deep · 30 km away
  13. 2.122 km ENE of Soledad, California · 14404 days ago · 8 km deep · 79 km away
  14. 2.09 km NNE of Coalinga, California · 14405 days ago · 9 km deep · 6 km away
  15. 1.6Central California · 14406 days ago · 9 km deep · 78 km away
  16. 3.111 km SW of Lake Nacimiento, California · 14406 days ago · 4 km deep · 81 km away
  17. 2.29 km NNW of Coalinga, California · 14407 days ago · 6 km deep · 7 km away
  18. 1.925 km NE of King City, California · 14407 days ago · 1 km deep · 60 km away
  19. 2.715 km NW of Parkfield, California · 14407 days ago · 5 km deep · 27 km away
  20. 1.737 km NE of Greenfield, California · 14408 days ago · 13 km deep · 63 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc98939 (also filed as ci720928). Read Tue, Sep 22, 2026, 11:13 AM UTC.