California earthquakes

M1.6 earthquake 19 km WSW of Three Rocks, California

A magnitude 1.6 earthquake struck 19 km WSW of Three Rocks, California on Fri, Feb 20, 1987, 8:55 AM PST (16:55 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M3.7 7 km NE of Avenal, California. This one was a foreshock.

Tranquillity forecastMore in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1987-02-20 16:55:05 UTC
Depth
14.9 km (9.3 mi), shallow
Epicenter
36.434° N, 120.594° 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 0.5 km horizontally, 1.0 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
167°
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 185 in the 60 days after this one and 107 in the 30 days before it.

After

  1. 2.224 km WSW of Coalinga, California · 14470 days ago · 6 km deep · 41 km away
  2. 1.718 km SSE of Tres Pinos, California · 14470 days ago · 10 km deep · 63 km away
  3. 1.720 km NNW of Coalinga, California · 14469 days ago · 9 km deep · 19 km away
  4. 3.322 km NNE of Soledad, California · 14469 days ago · 6 km deep · 58 km away
  5. 2.322 km NNE of Soledad, California · 14469 days ago · 5 km deep · 58 km away
  6. 2.722 km SSE of Tres Pinos, California · 14469 days ago · 6 km deep · 58 km away
  7. 2.722 km SSE of Tres Pinos, California · 14469 days ago · 5 km deep · 58 km away
  8. 1.922 km NNE of Soledad, California · 14469 days ago · 5 km deep · 58 km away
  9. 1.72 km S of Parkfield, California · 14469 days ago · 9 km deep · 63 km away
  10. 1.822 km NNE of Soledad, California · 14469 days ago · 6 km deep · 58 km away
  11. 2.422 km NNE of Soledad, California · 14469 days ago · 5 km deep · 58 km away
  12. 1.84 km ESE of Kettleman City, California · 14468 days ago · 5 km deep · 78 km away
  13. 1.624 km NE of Greenfield, California · 14468 days ago · 6 km deep · 41 km away
  14. 2.735 km WNW of Three Rocks, California · 14468 days ago · 7 km deep · 24 km away
  15. 1.62 km NNE of Coalinga, California · 14468 days ago · 11 km deep · 38 km away
  16. 1.924 km ENE of Soledad, California · 14468 days ago · 2 km deep · 43 km away
  17. 1.612 km NNE of Coalinga, California · 14467 days ago · 8 km deep · 33 km away
  18. 2.812 km NNE of Coalinga, California · 14467 days ago · 6 km deep · 32 km away
  19. 2.621 km NE of Soledad, California · 14466 days ago · 2 km deep · 52 km away
  20. 2.026 km NE of Soledad, California · 14466 days ago · 8 km deep · 51 km away
  21. 2.97 km W of Lemoore Station, California · 14466 days ago · 23 km deep · 58 km away
  22. 2.63 km ESE of Kettleman City, California · 14465 days ago · 0 km deep · 77 km away
  23. 1.914 km WSW of Soledad, California · 14465 days ago · 9 km deep · 79 km away
  24. 2.424 km ENE of Greenfield, California · 14465 days ago · 6 km deep · 36 km away
  25. 2.225 km ENE of Greenfield, California · 14465 days ago · 5 km deep · 36 km away
  26. 1.723 km ENE of Soledad, California · 14465 days ago · 4 km deep · 45 km away
  27. 1.76 km NE of Coalinga, California · 14464 days ago · 9 km deep · 38 km away
  28. 1.813 km SSE of Tres Pinos, California · 14464 days ago · 5 km deep · 66 km away
  29. 1.924 km NE of Soledad, California · 14463 days ago · 10 km deep · 48 km away
  30. 2.426 km ENE of Soledad, California · 14463 days ago · 7 km deep · 45 km away
  31. 2.57 km WNW of Kettleman City, California · 14462 days ago · 12 km deep · 67 km away
  32. 2.410 km S of Tres Pinos, California · 14462 days ago · 4 km deep · 72 km away
  33. 2.015 km SE of Tres Pinos, California · 14462 days ago · 12 km deep · 61 km away
  34. 1.67 km N of Coalinga, California · 14462 days ago · 9 km deep · 34 km away
  35. 1.95 km SSW of Ridgemark, California · 14461 days ago · 7 km deep · 80 km away
  36. 1.622 km ENE of Soledad, California · 14461 days ago · 5 km deep · 45 km away
  37. 1.58 km ENE of Tres Pinos, California · 14461 days ago · 9 km deep · 70 km away
  38. 1.715 km SE of Tres Pinos, California · 14460 days ago · 11 km deep · 60 km away
  39. 1.611 km ENE of Coalinga, California · 14460 days ago · 4 km deep · 44 km away
  40. 2.221 km NE of Soledad, California · 14459 days ago · 6 km deep · 56 km away
  41. 2.022 km NNE of Soledad, California · 14459 days ago · 4 km deep · 57 km away
  42. 2.54 km NNE of Coalinga, California · 14459 days ago · 14 km deep · 37 km away
  43. 3.39 km E of Coalinga, California · 14458 days ago · 2 km deep · 43 km away
  44. 1.78 km ENE of Hollister, California · 14458 days ago · 7 km deep · 82 km away
  45. 2.8Central California · 14458 days ago · 5 km deep · 84 km away
  46. 2.010 km SSW of San Lucas, California · 14458 days ago · 12 km deep · 60 km away
  47. 2.36 km N of Coalinga, California · 14458 days ago · 13 km deep · 33 km away
  48. 1.612 km N of San Simeon, California · 14458 days ago · 8 km deep · 92 km away
  49. 2.922 km NE of Soledad, California · 14458 days ago · 3 km deep · 55 km away
  50. 1.614 km NNW of Coalinga, California · 14457 days ago · 4 km deep · 24 km away
  51. 1.921 km NW of Parkfield, California · 14457 days ago · 4 km deep · 44 km away
  52. 2.24 km ESE of La Vina, California · 14456 days ago · 5 km deep · 67 km away
  53. 1.527 km ENE of Soledad, California · 14456 days ago · 9 km deep · 44 km away
  54. 1.725 km NW of Coalinga, California · 14456 days ago · 7 km deep · 15 km away
  55. 2.48 km ENE of Coalinga, California · 14456 days ago · 10 km deep · 40 km away
  56. 2.423 km NE of Soledad, California · 14456 days ago · 11 km deep · 52 km away
  57. 2.313 km WNW of La Vina, California · 14455 days ago · 5 km deep · 63 km away
  58. 1.96 km NE of Coalinga, California · 14455 days ago · 9 km deep · 38 km away
  59. 2.816 km NNW of San Simeon, California · 14454 days ago · 10 km deep · 93 km away
  60. 1.821 km NE of Soledad, California · 14452 days ago · 5 km deep · 52 km away

The first 60 of 185.

Before

  1. 1.724 km NW of Parkfield, California · 14470 days ago · 6 km deep · 41 km away
  2. 2.010 km ESE of Gilroy, California · 14471 days ago · 8 km deep · 98 km away
  3. 1.512 km WNW of Huron, California · 14472 days ago · 8 km deep · 39 km away
  4. 2.014 km NW of San Simeon, California · 14472 days ago · 10 km deep · 99 km away
  5. 1.6Central California · 14472 days ago · 3 km deep · 43 km away
  6. 2.06 km ESE of San Lucas, California · 14473 days ago · 11 km deep · 50 km away
  7. 2.13 km NNE of Coalinga, California · 14473 days ago · 12 km deep · 37 km away
  8. 2.124 km NE of Greenfield, California · 14474 days ago · 6 km deep · 41 km away
  9. 1.532 km SSW of Los Banos, California · 14474 days ago · 1 km deep · 49 km away
  10. 1.920 km NNE of Soledad, California · 14474 days ago · 5 km deep · 60 km away
  11. 1.810 km ESE of Gilroy, California · 14474 days ago · 9 km deep · 98 km away
  12. 2.110 km ESE of Gilroy, California · 14475 days ago · 9 km deep · 98 km away
  13. 1.86 km ENE of Hollister, California · 14475 days ago · 6 km deep · 83 km away
  14. 1.67 km ENE of Coalinga, California · 14475 days ago · 10 km deep · 40 km away
  15. 2.627 km NE of King City, California · 14475 days ago · 5 km deep · 31 km away
  16. 1.818 km NW of Parkfield, California · 14475 days ago · 4 km deep · 47 km away
  17. 2.54 km NNE of Coalinga, California · 14475 days ago · 14 km deep · 36 km away
  18. 1.65 km NNE of Coalinga, California · 14475 days ago · 13 km deep · 36 km away
  19. 1.714 km SE of Parkfield, California · 14476 days ago · 10 km deep · 75 km away
  20. 1.63 km E of Coalinga, California · 14476 days ago · 5 km deep · 41 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc95150. Read Sat, Oct 3, 2026, 8:49 PM UTC.