California earthquakes

M1.6 earthquake 11 km E of Blackhawk, California

A magnitude 1.6 earthquake struck 11 km E of Blackhawk, California on Wed, Jan 4, 1989, 9:31 AM PST (17:31 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.6 Northern California. This one was a foreshock.

Blackhawk 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1989-01-04 17:31:40 UTC
Depth
6.2 km (3.8 mi), shallow
Epicenter
37.840° N, 121.779° 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 0.4 km horizontally, 10.2 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
162°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 112 in the 60 days after this one and 30 in the 30 days before it.

After

  1. 2.06 km NE of East Foothills, California · 13785 days ago · 8 km deep · 46 km away
  2. 1.615 km SSE of Livermore, California · 13782 days ago · 8 km deep · 32 km away
  3. 2.518 km NE of East Foothills, California · 13781 days ago · 9 km deep · 37 km away
  4. 1.96 km SW of Danville, California · 13779 days ago · 11 km deep · 25 km away
  5. 1.515 km N of Morgan Hill, California · 13779 days ago · 6 km deep · 64 km away
  6. 2.65 km SW of Danville, California · 13779 days ago · 12 km deep · 25 km away
  7. 1.66 km WSW of Kenwood, California · 13778 days ago · 7 km deep · 96 km away
  8. 2.54 km S of San Ramon, California · 13778 days ago · 9 km deep · 21 km away
  9. 1.625 km W of Volta, California · 13777 days ago · 0 km deep · 98 km away
  10. 2.48 km NNE of East Foothills, California · 13777 days ago · 7 km deep · 43 km away
  11. 2.14 km S of San Ramon, California · 13777 days ago · 8 km deep · 22 km away
  12. 1.67 km E of East Foothills, California · 13776 days ago · 7 km deep · 51 km away
  13. 2.410 km NNE of East Foothills, California · 13776 days ago · 7 km deep · 40 km away
  14. 1.66 km SW of Danville, California · 13776 days ago · 11 km deep · 25 km away
  15. 1.56 km SW of Danville, California · 13776 days ago · 11 km deep · 25 km away
  16. 3.26 km ENE of East Foothills, California · 13775 days ago · 8 km deep · 48 km away
  17. 1.66 km WSW of Gilroy, California · 13774 days ago · 5 km deep · 96 km away
  18. 2.54 km S of San Ramon, California · 13774 days ago · 9 km deep · 21 km away
  19. 2.74 km S of San Ramon, California · 13774 days ago · 9 km deep · 21 km away
  20. 1.87 km E of East Foothills, California · 13773 days ago · 7 km deep · 51 km away
  21. 2.516 km SSE of Livermore, California · 13772 days ago · 3 km deep · 33 km away
  22. 2.35 km S of Muir Beach, California · 13772 days ago · 12 km deep · 71 km away
  23. 1.611 km SW of Brentwood, California · 13772 days ago · 15 km deep · 1 km away
  24. 2.34 km NNW of Pacifica, California · 13771 days ago · 8 km deep · 67 km away
  25. 1.98 km NNE of East Foothills, California · 13770 days ago · 9 km deep · 43 km away
  26. 1.76 km NW of Broadmoor, California · 13770 days ago · 7 km deep · 68 km away
  27. 1.918 km NE of East Foothills, California · 13769 days ago · 6 km deep · 38 km away
  28. 1.87 km ESE of Roseland, California · 13769 days ago · 9 km deep · 98 km away
  29. 1.76 km NNE of East Foothills, California · 13769 days ago · 6 km deep · 45 km away
  30. 2.215 km SSE of Livermore, California · 13768 days ago · 7 km deep · 32 km away
  31. 1.515 km SSE of Livermore, California · 13767 days ago · 6 km deep · 32 km away
  32. 1.82 km NE of Union City, California · 13765 days ago · 7 km deep · 31 km away
  33. 1.92 km SE of Bolinas, California · 13765 days ago · 7 km deep · 78 km away
  34. 2.13 km SSW of Muir Beach, California · 13761 days ago · 2 km deep · 72 km away
  35. 1.70 km NNW of Pleasant Hill, California · 13761 days ago · 9 km deep · 28 km away
  36. 2.26 km NE of East Foothills, California · 13760 days ago · 11 km deep · 47 km away
  37. 1.62 km N of Alamo, California · 13758 days ago · 5 km deep · 23 km away
  38. 2.39 km N of East Foothills, California · 13757 days ago · 3 km deep · 42 km away
  39. 1.62 km SSW of Riverdale Park, California · 13757 days ago · 9 km deep · 69 km away
  40. 2.28 km NNE of East Foothills, California · 13756 days ago · 9 km deep · 43 km away
  41. 2.3Northern California · 13756 days ago · 2 km deep · 72 km away
  42. 2.01 km SSE of Bolinas, California · 13755 days ago · 7 km deep · 79 km away
  43. 2.44 km NNW of Green Valley, California · 13753 days ago · 12 km deep · 61 km away
  44. 1.59 km ESE of Seven Trees, California · 13753 days ago · 5 km deep · 67 km away
  45. 2.518 km NE of East Foothills, California · 13753 days ago · 6 km deep · 38 km away
  46. 1.67 km WSW of Gilroy, California · 13753 days ago · 4 km deep · 96 km away
  47. 2.57 km E of East Foothills, California · 13750 days ago · 9 km deep · 50 km away
  48. 2.89 km NNE of East Foothills, California · 13749 days ago · 9 km deep · 43 km away
  49. 1.56 km ENE of East Foothills, California · 13748 days ago · 8 km deep · 49 km away
  50. 1.67 km E of East Foothills, California · 13748 days ago · 9 km deep · 50 km away
  51. 3.14 km SSW of Muir Beach, California · 13746 days ago · 2 km deep · 72 km away
  52. 3.34 km SSW of Muir Beach, California · 13746 days ago · 3 km deep · 72 km away
  53. 3.04 km SSW of Muir Beach, California · 13746 days ago · 2 km deep · 72 km away
  54. 1.84 km SSW of Muir Beach, California · 13746 days ago · 2 km deep · 73 km away
  55. 2.43 km SSW of Muir Beach, California · 13746 days ago · 3 km deep · 71 km away
  56. 2.2Northern California · 13746 days ago · 7 km deep · 37 km away
  57. 1.72 km S of Muir Beach, California · 13746 days ago · 0 km deep · 71 km away
  58. 1.614 km E of Seven Trees, California · 13746 days ago · 2 km deep · 62 km away
  59. 2.23 km SSW of Muir Beach, California · 13746 days ago · 0 km deep · 72 km away
  60. 3.03 km SSW of Muir Beach, California · 13746 days ago · 2 km deep · 72 km away

The first 60 of 112.

Before

  1. 1.58 km ESE of East Foothills, California · 13787 days ago · 7 km deep · 54 km away
  2. 1.91 km WSW of Crockett, California · 13790 days ago · 10 km deep · 46 km away
  3. 4.315 km E of Seven Trees, California · 13790 days ago · 7 km deep · 62 km away
  4. 1.815 km E of Seven Trees, California · 13790 days ago · 7 km deep · 62 km away
  5. 2.310 km ESE of East Foothills, California · 13791 days ago · 8 km deep · 55 km away
  6. 1.98 km NE of Gilroy, California · 13793 days ago · 4 km deep · 91 km away
  7. 1.69 km ESE of East Foothills, California · 13798 days ago · 7 km deep · 55 km away
  8. 2.515 km SSE of Livermore, California · 13798 days ago · 8 km deep · 32 km away
  9. 1.89 km SE of Sunol, California · 13799 days ago · 4 km deep · 35 km away
  10. 1.78 km ENE of San Martin, California · 13800 days ago · 7 km deep · 82 km away
  11. 2.69 km NNE of East Foothills, California · 13802 days ago · 8 km deep · 43 km away
  12. 1.64 km WSW of Broadmoor, California · 13803 days ago · 8 km deep · 68 km away
  13. 1.718 km SSE of Livermore, California · 13803 days ago · 7 km deep · 36 km away
  14. 2.618 km SSE of Livermore, California · 13803 days ago · 7 km deep · 36 km away
  15. 1.76 km E of East Foothills, California · 13804 days ago · 7 km deep · 51 km away
  16. 2.66 km NE of East Foothills, California · 13804 days ago · 9 km deep · 46 km away
  17. 2.015 km E of Gilroy, California · 13805 days ago · 4 km deep · 96 km away
  18. 1.916 km SSE of Livermore, California · 13807 days ago · 6 km deep · 33 km away
  19. 1.90 km W of Concord, California · 13808 days ago · 15 km deep · 28 km away
  20. 1.614 km N of Morgan Hill, California · 13808 days ago · 5 km deep · 66 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc129554. Read Sat, Oct 3, 2026, 3:50 AM UTC.