California earthquakes

M2.0 earthquake 7 km S of Antioch, California

A magnitude 2.0 earthquake struck 7 km S of Antioch, California on Mon, Mar 9, 1987, 1:14 AM PST (09:14 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M2.4 17 km NE of East Foothills, California. This one was a foreshock.

Antioch 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
2.0 (md), micro
Local time
UTC
1987-03-09 09:14:24 UTC
Depth
13.3 km (8.2 mi), shallow
Epicenter
37.936° N, 121.801° 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, 0.6 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
97°
Stations used
29

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 98 in the 60 days after this one and 65 in the 30 days before it.

After

  1. 1.86 km S of Antioch, California · 14441 days ago · 6 km deep · 2 km away
  2. 1.718 km NE of East Foothills, California · 14440 days ago · 7 km deep · 48 km away
  3. 1.58 km S of Antioch, California · 14440 days ago · 5 km deep · 1 km away
  4. 1.815 km SSE of Livermore, California · 14440 days ago · 4 km deep · 43 km away
  5. 1.65 km N of Novato, California · 14438 days ago · 2 km deep · 72 km away
  6. 1.69 km SE of Sunol, California · 14438 days ago · 10 km deep · 45 km away
  7. 1.918 km NE of East Foothills, California · 14437 days ago · 5 km deep · 49 km away
  8. 2.020 km ENE of East Foothills, California · 14435 days ago · 7 km deep · 53 km away
  9. 1.618 km SSE of Livermore, California · 14435 days ago · 4 km deep · 46 km away
  10. 1.616 km SSE of Livermore, California · 14433 days ago · 6 km deep · 44 km away
  11. 2.417 km NE of East Foothills, California · 14431 days ago · 6 km deep · 49 km away
  12. 1.513 km ENE of East Foothills, California · 14430 days ago · 8 km deep · 56 km away
  13. 2.1Northern California · 14430 days ago · 5 km deep · 65 km away
  14. 2.07 km NNE of East Foothills, California · 14429 days ago · 7 km deep · 54 km away
  15. 1.918 km NE of East Foothills, California · 14429 days ago · 6 km deep · 48 km away
  16. 1.79 km ESE of Seven Trees, California · 14428 days ago · 5 km deep · 78 km away
  17. 2.011 km S of Pescadero, California · 14427 days ago · 14 km deep · 100 km away
  18. 1.614 km E of Seven Trees, California · 14427 days ago · 2 km deep · 72 km away
  19. 1.814 km E of Seven Trees, California · 14427 days ago · 2 km deep · 72 km away
  20. 2.014 km E of Seven Trees, California · 14427 days ago · 2 km deep · 72 km away
  21. 1.818 km NE of East Foothills, California · 14426 days ago · 6 km deep · 49 km away
  22. 2.217 km SSE of Livermore, California · 14425 days ago · 1 km deep · 45 km away
  23. 1.94 km WSW of Broadmoor, California · 14425 days ago · 8 km deep · 71 km away
  24. 2.48 km ENE of San Martin, California · 14425 days ago · 8 km deep · 93 km away
  25. 1.815 km SSE of Livermore, California · 14424 days ago · 4 km deep · 43 km away
  26. 2.918 km SSE of Livermore, California · 14423 days ago · 2 km deep · 46 km away
  27. 1.5Northern California · 14423 days ago · 13 km deep · 48 km away
  28. 2.020 km NE of East Foothills, California · 14423 days ago · 1 km deep · 48 km away
  29. 1.514 km E of Seven Trees, California · 14422 days ago · 1 km deep · 73 km away
  30. 1.820 km NE of East Foothills, California · 14420 days ago · 0 km deep · 48 km away
  31. 1.712 km NE of East Foothills, California · 14420 days ago · 8 km deep · 53 km away
  32. 2.120 km NE of East Foothills, California · 14419 days ago · 1 km deep · 48 km away
  33. 1.920 km NE of East Foothills, California · 14419 days ago · 0 km deep · 48 km away
  34. 1.618 km NE of East Foothills, California · 14419 days ago · 6 km deep · 48 km away
  35. 1.718 km NE of East Foothills, California · 14418 days ago · 5 km deep · 48 km away
  36. 1.912 km ESE of East Foothills, California · 14417 days ago · 1 km deep · 66 km away
  37. 2.07 km SW of Mountain House, California · 14417 days ago · 15 km deep · 28 km away
  38. 1.93 km ESE of Kenwood, California · 14417 days ago · 0 km deep · 80 km away
  39. 2.81 km NNW of Castro Valley, California · 14417 days ago · 5 km deep · 36 km away
  40. 2.014 km N of Morgan Hill, California · 14415 days ago · 5 km deep · 76 km away
  41. 1.612 km ENE of East Foothills, California · 14414 days ago · 8 km deep · 57 km away
  42. 1.512 km NE of East Foothills, California · 14413 days ago · 6 km deep · 53 km away
  43. 2.07 km E of East Foothills, California · 14413 days ago · 6 km deep · 63 km away
  44. 1.73 km NW of Sunol, California · 14412 days ago · 3 km deep · 37 km away
  45. 1.519 km NE of East Foothills, California · 14411 days ago · 7 km deep · 48 km away
  46. 2.310 km ESE of East Foothills, California · 14411 days ago · 8 km deep · 66 km away
  47. 3.415 km SSE of Livermore, California · 14411 days ago · 4 km deep · 43 km away
  48. 2.610 km ESE of East Foothills, California · 14411 days ago · 7 km deep · 66 km away
  49. 2.113 km ENE of East Foothills, California · 14410 days ago · 7 km deep · 56 km away
  50. 1.713 km ENE of East Foothills, California · 14410 days ago · 7 km deep · 57 km away
  51. 2.417 km SSE of Livermore, California · 14408 days ago · 2 km deep · 45 km away
  52. 2.03 km ESE of Seven Trees, California · 14408 days ago · 7 km deep · 73 km away
  53. 3.314 km N of Morgan Hill, California · 14407 days ago · 4 km deep · 77 km away
  54. 1.52 km WSW of Cambrian Park, California · 14405 days ago · 6 km deep · 77 km away
  55. 1.610 km ESE of Seven Trees, California · 14404 days ago · 2 km deep · 77 km away
  56. 1.95 km SW of Mokelumne Hill, California · 14403 days ago · 0 km deep · 100 km away
  57. 2.36 km NNE of East Foothills, California · 14402 days ago · 5 km deep · 56 km away
  58. 1.81 km ENE of Walnut Creek, California · 14402 days ago · 5 km deep · 22 km away
  59. 2.78 km NE of San Martin, California · 14401 days ago · 7 km deep · 93 km away
  60. 1.513 km NNE of Angwin, California · 14401 days ago · 4 km deep · 98 km away

The first 60 of 98.

Before

  1. 2.28 km S of Antioch, California · 14443 days ago · 12 km deep · 1 km away
  2. 2.113 km ENE of East Foothills, California · 14443 days ago · 7 km deep · 55 km away
  3. 2.115 km E of Seven Trees, California · 14445 days ago · 6 km deep · 74 km away
  4. 1.818 km NE of East Foothills, California · 14445 days ago · 7 km deep · 48 km away
  5. 2.118 km NE of East Foothills, California · 14446 days ago · 6 km deep · 49 km away
  6. 1.718 km NE of East Foothills, California · 14447 days ago · 5 km deep · 49 km away
  7. 2.3Northern California · 14447 days ago · 7 km deep · 55 km away
  8. 1.69 km NW of Broadmoor, California · 14448 days ago · 7 km deep · 69 km away
  9. 1.518 km SSE of Livermore, California · 14449 days ago · 7 km deep · 47 km away
  10. 1.68 km SSE of Pescadero, California · 14449 days ago · 16 km deep · 96 km away
  11. 2.513 km ENE of East Foothills, California · 14450 days ago · 7 km deep · 57 km away
  12. 1.614 km SSE of Livermore, California · 14451 days ago · 5 km deep · 42 km away
  13. 1.613 km ENE of East Foothills, California · 14451 days ago · 8 km deep · 55 km away
  14. 1.713 km ENE of East Foothills, California · 14451 days ago · 8 km deep · 56 km away
  15. 1.714 km NE of East Foothills, California · 14451 days ago · 7 km deep · 55 km away
  16. 2.113 km ENE of East Foothills, California · 14451 days ago · 7 km deep · 55 km away
  17. 2.013 km ENE of East Foothills, California · 14451 days ago · 7 km deep · 55 km away
  18. 1.812 km NE of East Foothills, California · 14451 days ago · 7 km deep · 53 km away
  19. 3.113 km ENE of East Foothills, California · 14451 days ago · 7 km deep · 55 km away
  20. 3.913 km ENE of East Foothills, California · 14451 days ago · 8 km deep · 55 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc96332. Read Tue, Sep 22, 2026, 9:33 PM UTC.