California earthquakes

M2.4 earthquake 12 km SW of Byron, California

A magnitude 2.4 earthquake struck 12 km SW of Byron, California on Sat, Apr 19, 1980, 7:44 AM PST (15:44 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M2.4 2 km SE of Pacifica, California. This one was a foreshock.

Byron 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
2.4 (md), micro
Local time
UTC
1980-04-19 15:44:59 UTC
Depth
11.9 km (7.4 mi), shallow
Epicenter
37.795° N, 121.750° 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, 0.5 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
150°
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: 112 in the 60 days after this one and 46 in the 30 days before it.

After

  1. 1.99 km ENE of Gilroy, California · 16956 days ago · 9 km deep · 87 km away
  2. 2.45 km ESE of San Ramon, California · 16956 days ago · 7 km deep · 16 km away
  3. 2.00 km SW of San Ramon, California · 16956 days ago · 9 km deep · 21 km away
  4. 2.22 km NNW of Aromas, California · 16956 days ago · 10 km deep · 99 km away
  5. 2.32 km ESE of Pacifica, California · 16955 days ago · 9 km deep · 66 km away
  6. 2.42 km SE of Pacifica, California · 16955 days ago · 9 km deep · 66 km away
  7. 2.50 km SW of San Ramon, California · 16955 days ago · 9 km deep · 21 km away
  8. 1.74 km N of East Foothills, California · 16955 days ago · 2 km deep · 42 km away
  9. 1.710 km N of Pittsburg, California · 16954 days ago · 23 km deep · 39 km away
  10. 1.76 km SSE of Livermore, California · 16953 days ago · 5 km deep · 18 km away
  11. 1.89 km NE of Gilroy, California · 16953 days ago · 9 km deep · 84 km away
  12. 2.517 km ENE of East Foothills, California · 16952 days ago · 5 km deep · 43 km away
  13. 2.11 km SSW of San Ramon, California · 16952 days ago · 8 km deep · 21 km away
  14. 1.68 km SE of Livermore, California · 16952 days ago · 6 km deep · 19 km away
  15. 1.79 km SE of Livermore, California · 16952 days ago · 6 km deep · 19 km away
  16. 2.618 km ENE of East Foothills, California · 16951 days ago · 6 km deep · 43 km away
  17. 1.711 km E of Blackhawk, California · 16951 days ago · 13 km deep · 4 km away
  18. 2.16 km E of Santa Venetia, California · 16951 days ago · 4 km deep · 65 km away
  19. 3.113 km ESE of Alum Rock, California · 16951 days ago · 7 km deep · 54 km away
  20. 2.64 km WNW of Moskowite Corner, California · 16950 days ago · 3 km deep · 86 km away
  21. 2.0Northern California · 16950 days ago · 7 km deep · 39 km away
  22. 2.411 km NNE of Livermore, California · 16950 days ago · 8 km deep · 1 km away
  23. 2.0Northern California · 16950 days ago · 2 km deep · 58 km away
  24. 1.9Northern California · 16950 days ago · 5 km deep · 56 km away
  25. 2.03 km S of Fairview, California · 16948 days ago · 3 km deep · 31 km away
  26. 2.09 km ENE of Morgan Hill, California · 16948 days ago · 5 km deep · 73 km away
  27. 2.04 km SSW of Gilroy, California · 16946 days ago · 6 km deep · 93 km away
  28. 1.59 km NE of San Martin, California · 16946 days ago · 7 km deep · 76 km away
  29. 2.98 km NE of Gilroy, California · 16946 days ago · 7 km deep · 86 km away
  30. 2.08 km NE of Gilroy, California · 16946 days ago · 6 km deep · 86 km away
  31. 1.913 km W of Gustine, California · 16944 days ago · 3 km deep · 81 km away
  32. 1.610 km E of Blackhawk, California · 16944 days ago · 9 km deep · 5 km away
  33. 1.711 km E of Blackhawk, California · 16943 days ago · 11 km deep · 5 km away
  34. 1.6Northern California · 16943 days ago · 1 km deep · 16 km away
  35. 1.5Northern California · 16942 days ago · 9 km deep · 83 km away
  36. 1.63 km ESE of Sunnyvale, California · 16940 days ago · 1 km deep · 53 km away
  37. 1.57 km ENE of Gilroy, California · 16939 days ago · 4 km deep · 87 km away
  38. 2.011 km SW of Brentwood, California · 16938 days ago · 7 km deep · 7 km away
  39. 1.520 km SE of Livermore, California · 16937 days ago · 1 km deep · 31 km away
  40. 1.87 km SE of Lexington Hills, California · 16937 days ago · 13 km deep · 76 km away
  41. 2.97 km SE of Lexington Hills, California · 16936 days ago · 14 km deep · 76 km away
  42. 1.910 km NE of Gilroy, California · 16935 days ago · 12 km deep · 85 km away
  43. 1.86 km ENE of Seven Trees, California · 16934 days ago · 6 km deep · 53 km away
  44. 1.83 km ESE of Santa Venetia, California · 16934 days ago · 4 km deep · 68 km away
  45. 2.410 km NNE of Livermore, California · 16933 days ago · 13 km deep · 4 km away
  46. 2.3Northern California · 16933 days ago · 18 km deep · 21 km away
  47. 2.1Northern California · 16933 days ago · 8 km deep · 50 km away
  48. 1.93 km SSE of Pleasanton, California · 16930 days ago · 12 km deep · 21 km away
  49. 1.611 km ENE of Blackhawk, California · 16929 days ago · 13 km deep · 6 km away
  50. 1.58 km ENE of Interlaken, California · 16927 days ago · 3 km deep · 90 km away
  51. 1.812 km ESE of East Foothills, California · 16927 days ago · 8 km deep · 53 km away
  52. 2.912 km E of Blackhawk, California · 16926 days ago · 17 km deep · 4 km away
  53. 2.25 km E of Penngrove, California · 16926 days ago · 0 km deep · 94 km away
  54. 1.66 km NE of Kenwood, California · 16926 days ago · 8 km deep · 99 km away
  55. 2.75 km SSW of Oakville, California · 16925 days ago · 9 km deep · 89 km away
  56. 1.61 km SSE of Portola Valley, California · 16924 days ago · 6 km deep · 63 km away
  57. 1.56 km ESE of Lexington Hills, California · 16924 days ago · 12 km deep · 75 km away
  58. 2.39 km E of Gilroy, California · 16924 days ago · 8 km deep · 90 km away
  59. 1.97 km NE of Interlaken, California · 16923 days ago · 4 km deep · 90 km away
  60. 1.66 km SW of Antioch, California · 16922 days ago · 19 km deep · 22 km away

The first 60 of 112.

Before

  1. 1.79 km SE of Livermore, California · 16958 days ago · 7 km deep · 19 km away
  2. 1.59 km SE of Livermore, California · 16958 days ago · 7 km deep · 19 km away
  3. 1.712 km SSE of Livermore, California · 16958 days ago · 3 km deep · 24 km away
  4. 1.710 km SSE of Livermore, California · 16958 days ago · 4 km deep · 22 km away
  5. 2.39 km ESE of Livermore, California · 16958 days ago · 8 km deep · 18 km away
  6. 1.89 km NNE of East Foothills, California · 16958 days ago · 10 km deep · 37 km away
  7. 1.59 km E of Gilroy, California · 16959 days ago · 8 km deep · 90 km away
  8. 2.111 km E of Blackhawk, California · 16959 days ago · 11 km deep · 5 km away
  9. 2.516 km ENE of East Foothills, California · 16959 days ago · 8 km deep · 44 km away
  10. 1.94 km SSW of Muir Beach, California · 16959 days ago · 0 km deep · 74 km away
  11. 2.910 km SSE of Livermore, California · 16961 days ago · 6 km deep · 22 km away
  12. 1.911 km SW of Byron, California · 16962 days ago · 8 km deep · 1 km away
  13. 2.24 km ENE of Fremont, California · 16963 days ago · 9 km deep · 31 km away
  14. 2.011 km SW of Brentwood, California · 16963 days ago · 5 km deep · 9 km away
  15. 1.917 km ESE of East Foothills, California · 16963 days ago · 6 km deep · 51 km away
  16. 1.93 km SSE of Loyola, California · 16963 days ago · 5 km deep · 60 km away
  17. 1.812 km WSW of Byron, California · 16963 days ago · 9 km deep · 1 km away
  18. 1.58 km ENE of San Martin, California · 16964 days ago · 8 km deep · 78 km away
  19. 1.611 km NNE of Livermore, California · 16964 days ago · 12 km deep · 2 km away
  20. 1.52 km SW of Vallejo, California · 16965 days ago · 1 km deep · 56 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1052299. Read Tue, Sep 22, 2026, 10:31 PM UTC.