California earthquakes

M2.3 earthquake 2 km ENE of Pacheco, California

A magnitude 2.3 earthquake struck 2 km ENE of Pacheco, California on Fri, Dec 28, 1979, 5:32 AM PST (13:32 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M5.8 The 1980 Livermore, California Earthquake. This one was a foreshock.

Pacheco 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
2.3 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1979-12-28 13:32:54 UTC
Depth
15.9 km (9.9 mi), shallow
Epicenter
37.995° N, 122.052° 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, 0.8 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
48°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 192 in the 60 days after this one and 27 in the 30 days before it.

After

  1. 1.96 km NE of East Foothills, California · 17079 days ago · 8 km deep · 68 km away
  2. 2.44 km ESE of Lexington Hills, California · 17078 days ago · 11 km deep · 95 km away
  3. 1.73 km NNE of Alamo, California · 17077 days ago · 1 km deep · 14 km away
  4. 2.23 km ESE of Berkeley, California · 17076 days ago · 8 km deep · 22 km away
  5. 2.422 km WNW of Diablo Grande, California · 17075 days ago · 6 km deep · 76 km away
  6. 2.322 km E of East Foothills, California · 17073 days ago · 6 km deep · 79 km away
  7. 1.54 km SSE of Sunol, California · 17072 days ago · 8 km deep · 51 km away
  8. 2.58 km SW of Brentwood, California · 17068 days ago · 6 km deep · 29 km away
  9. 1.719 km ESE of East Foothills, California · 17068 days ago · 6 km deep · 85 km away
  10. 1.814 km E of Seven Trees, California · 17067 days ago · 1 km deep · 85 km away
  11. 3.06 km NE of Santa Rosa, California · 17067 days ago · 7 km deep · 75 km away
  12. 2.16 km NE of Santa Rosa, California · 17067 days ago · 6 km deep · 75 km away
  13. 1.623 km SE of Livermore, California · 17064 days ago · 7 km deep · 66 km away
  14. 2.216 km E of Seven Trees, California · 17062 days ago · 7 km deep · 86 km away
  15. 1.7Northern California · 17061 days ago · 8 km deep · 95 km away
  16. 2.817 km ESE of East Foothills, California · 17059 days ago · 8 km deep · 83 km away
  17. 1.79 km NE of Milpitas, California · 17059 days ago · 7 km deep · 60 km away
  18. 2.812 km ESE of Alum Rock, California · 17058 days ago · 8 km deep · 82 km away
  19. 2.10 km NNW of Pacheco, California · 17058 days ago · 6 km deep · 3 km away
  20. 1.56 km E of East Foothills, California · 17056 days ago · 2 km deep · 74 km away
  21. 1.52 km NNE of San Ramon, CA · 17055 days ago · 9 km deep · 23 km away
  22. 2.65 km NNE of Pittsburg, California · 17053 days ago · 18 km deep · 18 km away
  23. 1.714 km E of Seven Trees, California · 17053 days ago · 3 km deep · 84 km away
  24. 2.53 km N of Pittsburg, California · 17053 days ago · 19 km deep · 17 km away
  25. 3.011 km E of Blackhawk, California · 17052 days ago · 11 km deep · 30 km away
  26. 5.8The 1980 Livermore, California Earthquake · 17052 days ago · 14 km deep · 30 km away
  27. 5.111 km E of Blackhawk, California · 17052 days ago · 7 km deep · 32 km away
  28. 4.011 km WSW of Byron, California · 17052 days ago · 7 km deep · 30 km away
  29. 4.811 km E of Blackhawk, California · 17052 days ago · 4 km deep · 30 km away
  30. 2.210 km E of Blackhawk, California · 17052 days ago · 9 km deep · 30 km away
  31. 1.611 km E of Blackhawk, California · 17052 days ago · 6 km deep · 30 km away
  32. 2.310 km ENE of Blackhawk, California · 17052 days ago · 5 km deep · 29 km away
  33. 1.611 km E of Blackhawk, California · 17052 days ago · 2 km deep · 30 km away
  34. 1.810 km E of Blackhawk, California · 17052 days ago · 8 km deep · 30 km away
  35. 1.810 km E of Blackhawk, California · 17052 days ago · 8 km deep · 29 km away
  36. 1.911 km E of Blackhawk, California · 17052 days ago · 7 km deep · 29 km away
  37. 3.112 km E of Blackhawk, California · 17052 days ago · 6 km deep · 30 km away
  38. 2.811 km ENE of Blackhawk, California · 17052 days ago · 1 km deep · 29 km away
  39. 2.011 km E of Blackhawk, California · 17052 days ago · 9 km deep · 29 km away
  40. 1.712 km N of Livermore, California · 17052 days ago · 9 km deep · 34 km away
  41. 1.711 km NNE of Livermore, California · 17052 days ago · 8 km deep · 38 km away
  42. 1.710 km E of Blackhawk, California · 17052 days ago · 0 km deep · 28 km away
  43. 1.511 km ENE of Blackhawk, California · 17052 days ago · 5 km deep · 29 km away
  44. 2.110 km ENE of Blackhawk, California · 17052 days ago · 7 km deep · 29 km away
  45. 2.99 km SW of Brentwood, California · 17052 days ago · 8 km deep · 30 km away
  46. 1.911 km SW of Brentwood, California · 17052 days ago · 7 km deep · 28 km away
  47. 2.49 km E of Blackhawk, California · 17052 days ago · 6 km deep · 29 km away
  48. 2.79 km E of Blackhawk, California · 17052 days ago · 4 km deep · 29 km away
  49. 1.816 km ESE of Livermore, California · 17052 days ago · 5 km deep · 57 km away
  50. 1.512 km N of Livermore, California · 17052 days ago · 9 km deep · 34 km away
  51. 1.611 km ENE of Blackhawk, California · 17052 days ago · 0 km deep · 30 km away
  52. 3.111 km E of Blackhawk, California · 17052 days ago · 10 km deep · 30 km away
  53. 2.110 km E of Blackhawk, California · 17052 days ago · 9 km deep · 29 km away
  54. 2.910 km E of Blackhawk, California · 17052 days ago · 12 km deep · 29 km away
  55. 2.310 km ENE of Blackhawk, California · 17052 days ago · 1 km deep · 27 km away
  56. 2.810 km E of Blackhawk, California · 17052 days ago · 11 km deep · 29 km away
  57. 2.310 km ENE of Blackhawk, California · 17052 days ago · 9 km deep · 28 km away
  58. 3.59 km E of Blackhawk, California · 17052 days ago · 13 km deep · 28 km away
  59. 1.59 km ENE of Blackhawk, California · 17052 days ago · 8 km deep · 27 km away
  60. 3.09 km NNE of Livermore, California · 17052 days ago · 13 km deep · 39 km away

The first 60 of 192.

Before

  1. 1.817 km ENE of East Foothills, California · 17080 days ago · 6 km deep · 74 km away
  2. 2.62 km NW of Concord, California · 17080 days ago · 16 km deep · 0 km away
  3. 1.89 km NW of Montalvin, California · 17081 days ago · 4 km deep · 32 km away
  4. 2.211 km ESE of East Foothills, California · 17083 days ago · 7 km deep · 79 km away
  5. 1.618 km E of East Foothills, California · 17083 days ago · 4 km deep · 81 km away
  6. 1.76 km NNE of Dixon, California · 17085 days ago · 10 km deep · 60 km away
  7. 2.33 km SSW of Broadmoor, California · 17085 days ago · 7 km deep · 54 km away
  8. 1.616 km E of Seven Trees, California · 17086 days ago · 7 km deep · 86 km away
  9. 2.33 km WSW of Cupertino, California · 17087 days ago · 5 km deep · 76 km away
  10. 2.08 km E of East Foothills, California · 17087 days ago · 8 km deep · 75 km away
  11. 2.64 km E of South San Francisco, California · 17088 days ago · 9 km deep · 46 km away
  12. 1.87 km ENE of East Foothills, California · 17088 days ago · 5 km deep · 70 km away
  13. 1.51 km SW of North Gate, California · 17089 days ago · 6 km deep · 12 km away
  14. 1.84 km E of South San Francisco, California · 17089 days ago · 10 km deep · 46 km away
  15. 1.88 km NNE of East Foothills, California · 17089 days ago · 4 km deep · 65 km away
  16. 1.97 km NNE of Black Point-Green Point, California · 17090 days ago · 7 km deep · 43 km away
  17. 1.811 km SSE of Livermore, California · 17090 days ago · 5 km deep · 55 km away
  18. 2.12 km SSE of Concord, California · 17090 days ago · 19 km deep · 5 km away
  19. 2.09 km NE of Morgan Hill, California · 17094 days ago · 8 km deep · 99 km away
  20. 3.03 km NE of San Leandro, California · 17097 days ago · 6 km deep · 28 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1049593. Read Fri, Oct 2, 2026, 12:52 AM UTC.