California earthquakes

M2.6 earthquake 3 km SE of Pittsburg, California

A magnitude 2.6 earthquake struck 3 km SE of Pittsburg, California on Mon, May 26, 1975, 12:50 PM PDT (19:50 UTC), 17 km (11 mi) below the surface.

A larger quake followed: M3.6 2 km WSW of Portola Valley, California. This one was a foreshock.

Pittsburg 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
2.6 (md), micro
Local time
UTC
1975-05-26 19:50:50 UTC
Depth
17.1 km (10.6 mi), shallow
Epicenter
38.003° N, 121.854° 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, 0.3 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
142°
Stations used
42

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 88 in the 60 days after this one and 33 in the 30 days before it.

After

  1. 2.51 km NE of Hayward, California · 18752 days ago · 5 km deep · 41 km away
  2. 3.01 km W of Concord, California · 18751 days ago · 13 km deep · 17 km away
  3. 3.07 km NE of Blackhawk, California · 18750 days ago · 8 km deep · 16 km away
  4. 1.91 km W of Concord, California · 18749 days ago · 13 km deep · 17 km away
  5. 2.99 km ENE of Milpitas, California · 18748 days ago · 7 km deep · 59 km away
  6. 2.32 km SE of Knightsen, California · 18748 days ago · 5 km deep · 19 km away
  7. 2.014 km E of Seven Trees, California · 18747 days ago · 2 km deep · 80 km away
  8. 1.81 km NNW of Kensington, California · 18746 days ago · 6 km deep · 39 km away
  9. 3.18 km ENE of Morgan Hill, California · 18743 days ago · 4 km deep · 96 km away
  10. 1.87 km NNE of Castro Valley, California · 18742 days ago · 12 km deep · 33 km away
  11. 2.59 km N of Pittsburg, California · 18741 days ago · 20 km deep · 13 km away
  12. 2.110 km ESE of Black Point-Green Point, California · 18741 days ago · 10 km deep · 49 km away
  13. 3.12 km SE of Knightsen, California · 18739 days ago · 15 km deep · 19 km away
  14. 1.81 km WNW of Concord, California · 18739 days ago · 14 km deep · 17 km away
  15. 2.313 km N of Morgan Hill, California · 18739 days ago · 5 km deep · 85 km away
  16. 2.011 km ESE of Middletown, California · 18738 days ago · 7 km deep · 96 km away
  17. 1.611 km ESE of East Foothills, California · 18737 days ago · 6 km deep · 75 km away
  18. 2.219 km ENE of East Foothills, California · 18737 days ago · 5 km deep · 68 km away
  19. 2.54 km S of Loyola, California · 18737 days ago · 7 km deep · 80 km away
  20. 1.62 km SE of Clyde, California · 18736 days ago · 20 km deep · 14 km away
  21. 2.54 km W of Broadmoor, California · 18736 days ago · 7 km deep · 70 km away
  22. 2.514 km E of Seven Trees, California · 18736 days ago · 3 km deep · 82 km away
  23. 2.19 km NE of San Martin, California · 18735 days ago · 7 km deep · 98 km away
  24. 1.83 km NNW of Larkfield-Wikiup, California · 18735 days ago · 4 km deep · 100 km away
  25. 1.81 km N of Concord, California · 18733 days ago · 18 km deep · 16 km away
  26. 1.8Northern California · 18733 days ago · 9 km deep · 78 km away
  27. 1.7Northern California · 18733 days ago · 12 km deep · 68 km away
  28. 2.00 km WSW of Alamo, California · 18732 days ago · 9 km deep · 24 km away
  29. 1.910 km SW of Brentwood, California · 18731 days ago · 19 km deep · 18 km away
  30. 3.52 km NE of Pittsburg, California · 18731 days ago · 18 km deep · 5 km away
  31. 2.32 km NW of Orinda, California · 18731 days ago · 6 km deep · 33 km away
  32. 1.65 km NNE of Morgan Hill, California · 18731 days ago · 4 km deep · 95 km away
  33. 1.52 km ESE of Concord, California · 18730 days ago · 18 km deep · 14 km away
  34. 1.63 km W of Portola Valley, California · 18729 days ago · 10 km deep · 78 km away
  35. 2.32 km WSW of Portola Valley, California · 18729 days ago · 10 km deep · 78 km away
  36. 2.02 km W of Portola Valley, California · 18729 days ago · 9 km deep · 78 km away
  37. 2.311 km ESE of Livermore, California · 18729 days ago · 5 km deep · 44 km away
  38. 2.03 km WSW of Portola Valley, California · 18729 days ago · 9 km deep · 79 km away
  39. 3.42 km WSW of Portola Valley, California · 18729 days ago · 9 km deep · 78 km away
  40. 2.33 km W of Portola Valley, California · 18729 days ago · 9 km deep · 78 km away
  41. 1.92 km WSW of Portola Valley, California · 18729 days ago · 9 km deep · 79 km away
  42. 2.22 km WSW of Portola Valley, California · 18729 days ago · 9 km deep · 78 km away
  43. 1.83 km W of Portola Valley, California · 18729 days ago · 9 km deep · 78 km away
  44. 1.92 km WSW of Portola Valley, California · 18728 days ago · 9 km deep · 78 km away
  45. 1.93 km W of Portola Valley, California · 18728 days ago · 9 km deep · 78 km away
  46. 1.92 km WSW of Portola Valley, California · 18728 days ago · 8 km deep · 78 km away
  47. 2.22 km W of Portola Valley, California · 18728 days ago · 9 km deep · 78 km away
  48. 2.72 km W of Portola Valley, California · 18728 days ago · 9 km deep · 78 km away
  49. 3.32 km WSW of Portola Valley, California · 18728 days ago · 9 km deep · 78 km away
  50. 1.63 km WSW of Portola Valley, California · 18728 days ago · 10 km deep · 79 km away
  51. 1.72 km WSW of Portola Valley, California · 18728 days ago · 9 km deep · 79 km away
  52. 1.92 km WSW of Portola Valley, California · 18728 days ago · 10 km deep · 79 km away
  53. 3.42 km WSW of Portola Valley, California · 18728 days ago · 10 km deep · 79 km away
  54. 1.83 km W of Portola Valley, California · 18728 days ago · 9 km deep · 78 km away
  55. 2.02 km WSW of Portola Valley, California · 18728 days ago · 9 km deep · 79 km away
  56. 2.42 km WSW of Portola Valley, California · 18728 days ago · 10 km deep · 79 km away
  57. 1.63 km WSW of Portola Valley, California · 18728 days ago · 9 km deep · 79 km away
  58. 3.52 km WSW of Portola Valley, California · 18727 days ago · 10 km deep · 79 km away
  59. 2.32 km WSW of Portola Valley, California · 18727 days ago · 10 km deep · 78 km away
  60. 2.32 km SSE of Oakley, California · 18726 days ago · 1 km deep · 14 km away

The first 60 of 88.

Before

  1. 2.57 km S of Livermore, California · 18754 days ago · 8 km deep · 44 km away
  2. 1.76 km S of Sunol, California · 18756 days ago · 6 km deep · 52 km away
  3. 1.54 km SSE of Sunol, California · 18756 days ago · 14 km deep · 49 km away
  4. 2.36 km ENE of Santa Rosa, California · 18756 days ago · 10 km deep · 86 km away
  5. 1.96 km E of Santa Rosa, California · 18757 days ago · 9 km deep · 84 km away
  6. 1.83 km ESE of Piedmont, California · 18759 days ago · 7 km deep · 36 km away
  7. 2.116 km E of Seven Trees, California · 18760 days ago · 6 km deep · 81 km away
  8. 1.814 km NE of East Foothills, California · 18760 days ago · 7 km deep · 59 km away
  9. 2.411 km N of Morgan Hill, California · 18761 days ago · 6 km deep · 87 km away
  10. 1.721 km SE of Livermore, California · 18762 days ago · 3 km deep · 55 km away
  11. 2.49 km ENE of Morgan Hill, California · 18762 days ago · 5 km deep · 97 km away
  12. 3.010 km ESE of East Foothills, California · 18763 days ago · 8 km deep · 74 km away
  13. 2.410 km ESE of East Foothills, California · 18763 days ago · 8 km deep · 74 km away
  14. 1.53 km ESE of Berkeley, California · 18763 days ago · 13 km deep · 37 km away
  15. 2.32 km N of Kensington, California · 18763 days ago · 9 km deep · 38 km away
  16. 1.618 km NE of East Foothills, California · 18766 days ago · 7 km deep · 58 km away
  17. 2.17 km S of Sunol, California · 18766 days ago · 8 km deep · 53 km away
  18. 2.64 km E of East Foothills, California · 18767 days ago · 3 km deep · 70 km away
  19. 1.96 km NE of East Foothills, California · 18768 days ago · 6 km deep · 65 km away
  20. 1.821 km ENE of East Foothills, California · 18769 days ago · 6 km deep · 64 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1024003. Read Mon, Sep 28, 2026, 1:22 PM UTC.