California earthquakes

M1.6 earthquake 4 km ESE of San Ramon, California

A magnitude 1.6 earthquake struck 4 km ESE of San Ramon, California on Thu, Sep 23, 1982, 9:33 PM PDT (04:33 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M1.9 3 km W of Livermore, California. This one was a foreshock.

San Ramon 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), micro
Local time
UTC
1982-09-24 04:33:34 UTC
Depth
8.2 km (5.1 mi), shallow
Epicenter
37.757° N, 121.931° 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 0.1 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
55°
Stations used
32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 52 in the 60 days after this one and 36 in the 30 days before it.

After

  1. 1.93 km W of Livermore, California · 16069 days ago · 14 km deep · 14 km away
  2. 1.817 km NE of East Foothills, California · 16068 days ago · 7 km deep · 34 km away
  3. 2.15 km SSW of Gilroy, California · 16068 days ago · 4 km deep · 94 km away
  4. 1.84 km WSW of Moskowite Corner, California · 16068 days ago · 9 km deep · 80 km away
  5. 1.86 km WSW of Gilroy, California · 16067 days ago · 5 km deep · 89 km away
  6. 1.513 km N of Morgan Hill, California · 16066 days ago · 7 km deep · 60 km away
  7. 2.08 km ENE of Gilroy, California · 16066 days ago · 8 km deep · 88 km away
  8. 1.55 km SE of Cambrian Park, California · 16066 days ago · 0 km deep · 60 km away
  9. 2.210 km SW of Brentwood, California · 16062 days ago · 15 km deep · 18 km away
  10. 2.13 km ENE of Berkeley, California · 16062 days ago · 9 km deep · 31 km away
  11. 1.58 km ESE of East Foothills, California · 16061 days ago · 7 km deep · 48 km away
  12. 2.19 km ENE of San Martin, California · 16061 days ago · 7 km deep · 80 km away
  13. 1.614 km E of Seven Trees, California · 16056 days ago · 3 km deep · 56 km away
  14. 1.71 km NE of Pacheco, California · 16056 days ago · 14 km deep · 29 km away
  15. 2.04 km NNE of Fremont, California · 16055 days ago · 9 km deep · 20 km away
  16. 2.43 km NNE of East Foothills, California · 16052 days ago · 3 km deep · 40 km away
  17. 1.67 km ESE of East Foothills, California · 16051 days ago · 2 km deep · 47 km away
  18. 1.73 km ENE of Alamo, California · 16051 days ago · 10 km deep · 13 km away
  19. 1.85 km SW of Gilroy, California · 16050 days ago · 3 km deep · 92 km away
  20. 1.94 km N of Kenwood, California · 16049 days ago · 5 km deep · 94 km away
  21. 1.615 km SW of Santa Cruz, California · 16048 days ago · 8 km deep · 100 km away
  22. 1.96 km ESE of Roseland, California · 16047 days ago · 9 km deep · 95 km away
  23. 2.41 km NE of Danville, California · 16046 days ago · 7 km deep · 9 km away
  24. 1.610 km E of Blackhawk, California · 16045 days ago · 16 km deep · 15 km away
  25. 1.95 km NNE of San Martin, California · 16044 days ago · 4 km deep · 76 km away
  26. 2.212 km WSW of Byron, California · 16044 days ago · 10 km deep · 16 km away
  27. 3.78 km NE of Corralitos, California · 16044 days ago · 12 km deep · 82 km away
  28. 1.66 km WSW of Eldridge, California · 16044 days ago · 8 km deep · 84 km away
  29. 2.312 km NE of Morgan Hill, California · 16042 days ago · 6 km deep · 70 km away
  30. 1.610 km S of Muir Beach, California · 16037 days ago · 13 km deep · 56 km away
  31. 1.87 km S of Sunol, California · 16035 days ago · 7 km deep · 26 km away
  32. 1.89 km E of San Martin, California · 16033 days ago · 8 km deep · 83 km away
  33. 1.710 km SE of Livermore, California · 16032 days ago · 4 km deep · 26 km away
  34. 2.13 km SSW of Green Valley, California · 16029 days ago · 11 km deep · 56 km away
  35. 3.23 km W of Moskowite Corner, California · 16028 days ago · 8 km deep · 81 km away
  36. 2.53 km W of Livermore, California · 16027 days ago · 15 km deep · 14 km away
  37. 2.03 km W of Livermore, California · 16027 days ago · 14 km deep · 13 km away
  38. 2.03 km W of Livermore, California · 16026 days ago · 15 km deep · 14 km away
  39. 1.518 km NW of Diablo Grande, California · 16025 days ago · 4 km deep · 51 km away
  40. 1.518 km E of Seven Trees, California · 16023 days ago · 4 km deep · 57 km away
  41. 2.33 km ESE of Los Gatos, California · 16023 days ago · 10 km deep · 60 km away
  42. 1.9Northern California · 16022 days ago · 3 km deep · 18 km away
  43. 1.61 km ENE of East Richmond Heights, California · 16022 days ago · 7 km deep · 39 km away
  44. 2.311 km ESE of Gilroy, California · 16022 days ago · 4 km deep · 96 km away
  45. 3.09 km NNE of East Foothills, California · 16018 days ago · 9 km deep · 36 km away
  46. 1.711 km SW of Brentwood, California · 16018 days ago · 15 km deep · 17 km away
  47. 2.211 km NNE of Morgan Hill, California · 16014 days ago · 5 km deep · 64 km away
  48. 2.08 km E of Seven Trees, California · 16014 days ago · 6 km deep · 56 km away
  49. 2.19 km E of San Martin, California · 16012 days ago · 8 km deep · 84 km away
  50. 1.72 km ESE of Pittsburg, California · 16012 days ago · 16 km deep · 30 km away
  51. 1.67 km ESE of Santa Rosa, California · 16011 days ago · 8 km deep · 96 km away
  52. 1.52 km SW of Dublin, California · 16011 days ago · 9 km deep · 8 km away

Before

  1. 1.711 km NNW of Hollister, California · 16070 days ago · 7 km deep · 99 km away
  2. 1.914 km N of Morgan Hill, California · 16074 days ago · 5 km deep · 61 km away
  3. 1.79 km NE of San Martin, California · 16074 days ago · 8 km deep · 78 km away
  4. 1.89 km N of East Foothills, California · 16075 days ago · 6 km deep · 34 km away
  5. 1.82 km ENE of Inverness, California · 16075 days ago · 2 km deep · 88 km away
  6. 2.411 km ESE of East Foothills, California · 16077 days ago · 8 km deep · 50 km away
  7. 2.07 km NNE of East Foothills, California · 16078 days ago · 7 km deep · 36 km away
  8. 2.23 km WSW of Clayton, California · 16082 days ago · 13 km deep · 20 km away
  9. 1.86 km ENE of East Foothills, California · 16083 days ago · 7 km deep · 42 km away
  10. 3.16 km ENE of East Foothills, California · 16083 days ago · 8 km deep · 42 km away
  11. 1.515 km N of Morgan Hill, California · 16084 days ago · 6 km deep · 60 km away
  12. 2.16 km WSW of Gilroy, California · 16085 days ago · 5 km deep · 90 km away
  13. 1.811 km NW of Moskowite Corner, California · 16086 days ago · -1 km deep · 90 km away
  14. 1.64 km SW of Saint Helena, California · 16086 days ago · 5 km deep · 94 km away
  15. 1.65 km WNW of Newman, California · 16087 days ago · 5 km deep · 89 km away
  16. 1.710 km ENE of Blackhawk, California · 16087 days ago · 12 km deep · 16 km away
  17. 1.74 km WNW of Newman, California · 16087 days ago · 12 km deep · 89 km away
  18. 2.30 km SE of Concord, California · 16088 days ago · 7 km deep · 26 km away
  19. 1.98 km ENE of Milpitas, California · 16088 days ago · 2 km deep · 34 km away
  20. 1.72 km E of East Foothills, California · 16089 days ago · 4 km deep · 43 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1079430. Read Wed, Sep 23, 2026, 12:55 AM UTC.