California earthquakes

M1.9 earthquake 4 km WNW of Tracy, California

A magnitude 1.9 earthquake struck 4 km WNW of Tracy, California on Wed, Oct 15, 1986, 4:52 AM PDT (11:52 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.1 16 km SSE of Livermore, California. This one was a foreshock.

Tracy 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
1.9 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1986-10-15 11:52:34 UTC
Depth
5.9 km (3.7 mi), shallow
Epicenter
37.752° N, 121.472° 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 1.1 km horizontally, 13.6 km in depth
Magnitude uncertainty
±0.26
Depth from
From location
Station coverage gap
140°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 145 in the 60 days after this one and 60 in the 30 days before it.

After

  1. 1.618 km NE of East Foothills, California · 14596 days ago · 6 km deep · 33 km away
  2. 2.53 km NNE of San Leandro, California · 14595 days ago · 7 km deep · 59 km away
  3. 2.43 km NNE of San Leandro, California · 14595 days ago · 7 km deep · 59 km away
  4. 1.86 km NE of Hollister, California · 14594 days ago · 7 km deep · 97 km away
  5. 1.86 km NE of Hollister, California · 14594 days ago · 6 km deep · 97 km away
  6. 1.611 km ENE of Blackhawk, California · 14594 days ago · 9 km deep · 30 km away
  7. 2.86 km ENE of Hollister, California · 14594 days ago · 6 km deep · 97 km away
  8. 1.510 km ENE of Blackhawk, California · 14594 days ago · 10 km deep · 30 km away
  9. 1.56 km ENE of Hollister, California · 14594 days ago · 6 km deep · 98 km away
  10. 2.56 km ENE of Hollister, California · 14594 days ago · 6 km deep · 98 km away
  11. 1.55 km NE of Hollister, California · 14594 days ago · 6 km deep · 97 km away
  12. 2.56 km ENE of Hollister, California · 14594 days ago · 7 km deep · 97 km away
  13. 1.518 km NE of East Foothills, California · 14594 days ago · 7 km deep · 32 km away
  14. 1.76 km NE of Interlaken, California · 14594 days ago · 3 km deep · 87 km away
  15. 1.67 km NE of Interlaken, California · 14594 days ago · 2 km deep · 86 km away
  16. 2.66 km NE of Interlaken, California · 14594 days ago · 3 km deep · 87 km away
  17. 1.7Northern California · 14593 days ago · 2 km deep · 28 km away
  18. 1.76 km NE of Hollister, California · 14593 days ago · 7 km deep · 97 km away
  19. 1.82 km ENE of Berkeley, California · 14592 days ago · 9 km deep · 69 km away
  20. 1.75 km SSW of Gilroy, California · 14591 days ago · 2 km deep · 88 km away
  21. 2.713 km ENE of East Foothills, California · 14591 days ago · 8 km deep · 39 km away
  22. 2.57 km NE of Interlaken, California · 14591 days ago · 4 km deep · 86 km away
  23. 1.514 km SSE of Livermore, California · 14591 days ago · 2 km deep · 27 km away
  24. 1.718 km NE of East Foothills, California · 14590 days ago · 5 km deep · 33 km away
  25. 2.46 km SE of Pescadero, California · 14589 days ago · 14 km deep · 97 km away
  26. 2.54 km SW of Mokelumne Hill, California · 14589 days ago · 0 km deep · 86 km away
  27. 1.77 km N of East Foothills, California · 14588 days ago · 7 km deep · 45 km away
  28. 2.412 km SSE of Livermore, California · 14588 days ago · 3 km deep · 28 km away
  29. 1.76 km SSW of Gilroy, California · 14588 days ago · 6 km deep · 89 km away
  30. 1.612 km ESE of East Foothills, California · 14587 days ago · 6 km deep · 51 km away
  31. 2.010 km SSE of Moskowite Corner, California · 14587 days ago · 4 km deep · 90 km away
  32. 2.29 km ENE of Milpitas, California · 14586 days ago · 3 km deep · 43 km away
  33. 1.511 km ESE of East Foothills, California · 14586 days ago · 7 km deep · 51 km away
  34. 1.511 km ESE of East Foothills, California · 14586 days ago · 7 km deep · 51 km away
  35. 2.511 km ESE of East Foothills, California · 14585 days ago · 7 km deep · 51 km away
  36. 3.69 km NE of Morgan Hill, California · 14584 days ago · 7 km deep · 64 km away
  37. 2.111 km NE of East Foothills, California · 14584 days ago · 3 km deep · 40 km away
  38. 2.517 km NE of East Foothills, California · 14584 days ago · 8 km deep · 33 km away
  39. 2.40 km WNW of Concord, California · 14583 days ago · 13 km deep · 56 km away
  40. 1.612 km NE of East Foothills, California · 14581 days ago · 2 km deep · 39 km away
  41. 1.87 km SW of Gilroy, California · 14580 days ago · 4 km deep · 89 km away
  42. 1.97 km SW of Gilroy, California · 14580 days ago · 4 km deep · 89 km away
  43. 3.55 km S of Gilroy, California · 14580 days ago · 5 km deep · 89 km away
  44. 1.615 km ENE of East Foothills, California · 14580 days ago · 9 km deep · 37 km away
  45. 1.71 km SSW of Alamo, California · 14579 days ago · 9 km deep · 51 km away
  46. 2.44 km SE of Rodeo, California · 14579 days ago · 8 km deep · 73 km away
  47. 2.55 km S of Gilroy, California · 14579 days ago · 6 km deep · 89 km away
  48. 2.911 km ESE of East Foothills, California · 14579 days ago · 7 km deep · 51 km away
  49. 3.411 km ESE of East Foothills, California · 14579 days ago · 7 km deep · 50 km away
  50. 1.711 km ESE of East Foothills, California · 14579 days ago · 7 km deep · 50 km away
  51. 2.49 km ESE of East Foothills, California · 14579 days ago · 7 km deep · 49 km away
  52. 3.02 km N of Pacifica, California · 14578 days ago · 8 km deep · 90 km away
  53. 1.97 km ESE of East Foothills, California · 14578 days ago · 5 km deep · 49 km away
  54. 2.317 km NE of East Foothills, California · 14578 days ago · 8 km deep · 34 km away
  55. 1.614 km NNE of East Foothills, California · 14576 days ago · 5 km deep · 37 km away
  56. 2.519 km NE of East Foothills, California · 14576 days ago · 6 km deep · 32 km away
  57. 2.04 km SE of Rodeo, California · 14576 days ago · 8 km deep · 73 km away
  58. 1.59 km NNE of Milpitas, California · 14576 days ago · 8 km deep · 43 km away
  59. 1.518 km NE of East Foothills, California · 14576 days ago · 6 km deep · 33 km away
  60. 1.67 km ESE of East Foothills, California · 14575 days ago · 0 km deep · 52 km away

The first 60 of 145.

Before

  1. 2.65 km NE of Hollister, California · 14596 days ago · 7 km deep · 97 km away
  2. 1.85 km ENE of Hollister, California · 14596 days ago · 6 km deep · 98 km away
  3. 2.03 km SW of Mokelumne Hill, California · 14597 days ago · 0 km deep · 87 km away
  4. 2.110 km SE of Seven Trees, California · 14597 days ago · 7 km deep · 64 km away
  5. 1.62 km ESE of Danville, California · 14597 days ago · 7 km deep · 45 km away
  6. 2.36 km ENE of Hollister, California · 14597 days ago · 7 km deep · 97 km away
  7. 2.19 km NNE of Livermore, California · 14598 days ago · 12 km deep · 21 km away
  8. 1.73 km E of Discovery Bay, California · 14599 days ago · 12 km deep · 19 km away
  9. 1.616 km NE of East Foothills, California · 14599 days ago · 3 km deep · 36 km away
  10. 1.613 km ENE of East Foothills, California · 14599 days ago · 8 km deep · 39 km away
  11. 1.814 km E of Seven Trees, California · 14599 days ago · 2 km deep · 54 km away
  12. 1.72 km ESE of Danville, California · 14600 days ago · 5 km deep · 45 km away
  13. 1.72 km ESE of Danville, California · 14600 days ago · 8 km deep · 45 km away
  14. 1.62 km SSW of Diablo, California · 14600 days ago · 8 km deep · 44 km away
  15. 3.21 km SSW of Diablo, California · 14600 days ago · 9 km deep · 44 km away
  16. 2.02 km ESE of Danville, California · 14600 days ago · 7 km deep · 45 km away
  17. 1.62 km ESE of Danville, California · 14600 days ago · 7 km deep · 45 km away
  18. 1.92 km SSW of Diablo, California · 14600 days ago · 7 km deep · 44 km away
  19. 4.21 km SSW of Diablo, California · 14600 days ago · 9 km deep · 44 km away
  20. 1.86 km NE of East Foothills, California · 14601 days ago · 4 km deep · 45 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc85764. Read Thu, Oct 1, 2026, 11:50 AM UTC.