California earthquakes

M1.7 earthquake 1 km NW of Blackhawk, California

A magnitude 1.7 earthquake struck 1 km NW of Blackhawk, California on Sat, Jan 5, 1974, 3:06 PM PST (23:06 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.4 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
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1974-01-05 23:06:52 UTC
Depth
9.8 km (6.1 mi), shallow
Epicenter
37.834° N, 121.922° 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
±0.12
Depth from
From location
Station coverage gap
62°
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: 74 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 2.16 km SW of Gilroy, California · 19263 days ago · 6 km deep · 100 km away
  2. 1.59 km ENE of East Foothills, California · 19262 days ago · 3 km deep · 50 km away
  3. 2.38 km N of Interlaken, California · 19262 days ago · 10 km deep · 92 km away
  4. 2.22 km NW of Diablo, California · 19261 days ago · 7 km deep · 5 km away
  5. 3.16 km SW of Kenwood, California · 19261 days ago · 3 km deep · 85 km away
  6. 1.51 km SSW of Los Altos Hills, California · 19260 days ago · 8 km deep · 55 km away
  7. 1.86 km SSW of Sunol, California · 19258 days ago · 6 km deep · 33 km away
  8. 2.37 km S of Sunol, California · 19258 days ago · 7 km deep · 34 km away
  9. 1.99 km NE of Corralitos, California · 19258 days ago · 13 km deep · 88 km away
  10. 2.33 km NE of San Ramon, California · 19258 days ago · 8 km deep · 5 km away
  11. 1.65 km N of Boulder Creek, California · 19258 days ago · 8 km deep · 75 km away
  12. 2.76 km NE of Blackhawk, California · 19256 days ago · 12 km deep · 7 km away
  13. 2.414 km NNE of East Foothills, California · 19255 days ago · 7 km deep · 40 km away
  14. 2.50 km WSW of Green Valley, California · 19254 days ago · 10 km deep · 51 km away
  15. 1.9Northern California · 19251 days ago · 10 km deep · 23 km away
  16. 1.7Northern California · 19250 days ago · 6 km deep · 92 km away
  17. 2.714 km N of Morgan Hill, California · 19250 days ago · 5 km deep · 68 km away
  18. 1.7Central California · 19250 days ago · 6 km deep · 96 km away
  19. 2.05 km SW of Gilroy, California · 19249 days ago · 4 km deep · 99 km away
  20. 1.96 km ENE of Morgan Hill, California · 19249 days ago · 3 km deep · 82 km away
  21. 1.63 km W of Danville, California · 19248 days ago · 7 km deep · 10 km away
  22. 1.615 km E of Seven Trees, California · 19248 days ago · 4 km deep · 65 km away
  23. 2.514 km E of Seven Trees, California · 19247 days ago · 1 km deep · 64 km away
  24. 2.91 km SSW of Moskowite Corner, California · 19245 days ago · 16 km deep · 70 km away
  25. 2.28 km NE of Corralitos, California · 19245 days ago · 13 km deep · 88 km away
  26. 1.810 km E of Angwin, California · 19242 days ago · 7 km deep · 89 km away
  27. 1.915 km E of Seven Trees, California · 19241 days ago · 4 km deep · 64 km away
  28. 2.68 km ENE of Morgan Hill, California · 19241 days ago · 3 km deep · 81 km away
  29. 1.98 km N of Pittsburg, California · 19241 days ago · 16 km deep · 31 km away
  30. 2.09 km ENE of Gilroy, California · 19236 days ago · 8 km deep · 98 km away
  31. 1.96 km SW of Gilroy, California · 19234 days ago · 3 km deep · 99 km away
  32. 2.55 km WSW of Gilroy, California · 19234 days ago · 1 km deep · 99 km away
  33. 1.89 km NE of San Martin, California · 19234 days ago · 8 km deep · 85 km away
  34. 3.313 km ESE of East Foothills, California · 19234 days ago · 7 km deep · 61 km away
  35. 1.73 km SSE of Day Valley, California · 19231 days ago · 13 km deep · 93 km away
  36. 1.73 km NNE of San Leandro, California · 19230 days ago · 8 km deep · 21 km away
  37. 2.06 km WSW of Gilroy, California · 19229 days ago · 4 km deep · 99 km away
  38. 2.36 km ENE of Blackhawk, California · 19229 days ago · 11 km deep · 7 km away
  39. 1.66 km ENE of Blackhawk, California · 19229 days ago · 10 km deep · 7 km away
  40. 3.37 km E of East Foothills, California · 19229 days ago · 9 km deep · 53 km away
  41. 2.05 km E of Santa Rosa, California · 19229 days ago · 10 km deep · 92 km away
  42. 1.76 km ENE of Blackhawk, California · 19228 days ago · 10 km deep · 7 km away
  43. 2.76 km ENE of Blackhawk, California · 19228 days ago · 12 km deep · 7 km away
  44. 2.18 km NE of San Martin, California · 19228 days ago · 6 km deep · 86 km away
  45. 1.64 km S of Dublin, California · 19228 days ago · 7 km deep · 19 km away
  46. 2.56 km S of Sunol, California · 19227 days ago · 8 km deep · 33 km away
  47. 2.56 km S of Sunol, California · 19227 days ago · 8 km deep · 33 km away
  48. 1.84 km NNW of Pittsburg, California · 19227 days ago · 6 km deep · 26 km away
  49. 3.18 km ENE of Patterson, California · 19225 days ago · 2 km deep · 86 km away
  50. 1.86 km E of Black Point-Green Point, California · 19224 days ago · 0 km deep · 56 km away
  51. 1.68 km ENE of San Martin, California · 19224 days ago · 8 km deep · 86 km away
  52. 2.43 km ENE of Pittsburg, California · 19222 days ago · 12 km deep · 24 km away
  53. 1.83 km SSE of Day Valley, California · 19222 days ago · 12 km deep · 92 km away
  54. 3.38 km ENE of San Martin, California · 19221 days ago · 7 km deep · 88 km away
  55. 1.63 km SSW of Gilroy, California · 19219 days ago · 0 km deep · 99 km away
  56. 1.8Central California · 19219 days ago · 5 km deep · 100 km away
  57. 1.914 km E of Seven Trees, California · 19218 days ago · 5 km deep · 65 km away
  58. 1.8Northern California · 19218 days ago · 8 km deep · 95 km away
  59. 2.39 km S of Antioch, California · 19217 days ago · 11 km deep · 14 km away
  60. 2.23 km N of East Foothills, California · 19217 days ago · 1 km deep · 48 km away

The first 60 of 74.

Before

  1. 2.01 km WNW of Cambrian Park, California · 19264 days ago · 11 km deep · 64 km away
  2. 1.524 km WNW of Diablo Grande, California · 19264 days ago · 4 km deep · 54 km away
  3. 1.64 km SE of San Ramon, California · 19265 days ago · 7 km deep · 9 km away
  4. 1.815 km E of Seven Trees, California · 19265 days ago · 1 km deep · 66 km away
  5. 1.89 km NW of Morgan Hill, California · 19266 days ago · 8 km deep · 73 km away
  6. 3.54 km NNE of East Foothills, California · 19271 days ago · 7 km deep · 47 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1018321. Read Fri, Oct 2, 2026, 10:33 PM UTC.