California earthquakes

M2.3 earthquake 0 km SE of Concord, California

A magnitude 2.3 earthquake struck 0 km SE of Concord, California on Mon, Sep 6, 1982, 4:15 AM PDT (11:15 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.1 6 km ENE of East Foothills, California. This one was a foreshock.

Concord 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
2.3 (md), micro
Local time
UTC
1982-09-06 11:15:57 UTC
Depth
6.5 km (4.0 mi), shallow
Epicenter
37.974° N, 122.024° 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 0.2 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.21
Depth from
From location
Station coverage gap
72°
Stations used
40

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 50 in the 60 days after this one and 38 in the 30 days before it.

After

  1. 1.710 km ENE of Blackhawk, California · 16087 days ago · 12 km deep · 25 km away
  2. 1.64 km SW of Saint Helena, California · 16086 days ago · 5 km deep · 70 km away
  3. 1.811 km NW of Moskowite Corner, California · 16086 days ago · -1 km deep · 65 km away
  4. 1.515 km N of Morgan Hill, California · 16084 days ago · 6 km deep · 85 km away
  5. 3.16 km ENE of East Foothills, California · 16083 days ago · 8 km deep · 67 km away
  6. 1.86 km ENE of East Foothills, California · 16083 days ago · 7 km deep · 68 km away
  7. 2.23 km WSW of Clayton, California · 16082 days ago · 13 km deep · 7 km away
  8. 2.07 km NNE of East Foothills, California · 16078 days ago · 7 km deep · 62 km away
  9. 2.411 km ESE of East Foothills, California · 16077 days ago · 8 km deep · 76 km away
  10. 1.82 km SE of Larkfield-Wikiup, California · 16077 days ago · 5 km deep · 85 km away
  11. 1.82 km ENE of Inverness, California · 16075 days ago · 2 km deep · 72 km away
  12. 1.89 km N of East Foothills, California · 16075 days ago · 6 km deep · 60 km away
  13. 1.914 km N of Morgan Hill, California · 16074 days ago · 5 km deep · 86 km away
  14. 2.28 km W of Calistoga, California · 16074 days ago · 6 km deep · 89 km away
  15. 1.88 km ESE of Hidden Valley Lake, California · 16073 days ago · 7 km deep · 98 km away
  16. 2.39 km ESE of Hidden Valley Lake, California · 16071 days ago · 7 km deep · 98 km away
  17. 2.513 km ESE of Hidden Valley Lake, California · 16070 days ago · -1 km deep · 92 km away
  18. 2.110 km ESE of Hidden Valley Lake, California · 16070 days ago · 7 km deep · 96 km away
  19. 1.64 km ESE of San Ramon, California · 16070 days ago · 8 km deep · 26 km away
  20. 1.93 km W of Livermore, California · 16069 days ago · 14 km deep · 38 km away
  21. 1.817 km NE of East Foothills, California · 16068 days ago · 7 km deep · 59 km away
  22. 1.84 km WSW of Moskowite Corner, California · 16068 days ago · 9 km deep · 55 km away
  23. 1.513 km N of Morgan Hill, California · 16066 days ago · 7 km deep · 86 km away
  24. 1.55 km SE of Cambrian Park, California · 16066 days ago · 0 km deep · 85 km away
  25. 1.87 km W of Calistoga, California · 16065 days ago · 7 km deep · 88 km away
  26. 2.210 km SW of Brentwood, California · 16062 days ago · 15 km deep · 26 km away
  27. 2.13 km ENE of Berkeley, California · 16062 days ago · 9 km deep · 22 km away
  28. 1.58 km ESE of East Foothills, California · 16061 days ago · 7 km deep · 74 km away
  29. 1.88 km ESE of Hidden Valley Lake, California · 16056 days ago · 8 km deep · 98 km away
  30. 1.614 km E of Seven Trees, California · 16056 days ago · 3 km deep · 82 km away
  31. 1.71 km NE of Pacheco, California · 16056 days ago · 14 km deep · 4 km away
  32. 1.68 km ESE of Hidden Valley Lake, California · 16055 days ago · 7 km deep · 98 km away
  33. 2.04 km NNE of Fremont, California · 16055 days ago · 9 km deep · 44 km away
  34. 2.43 km NNE of East Foothills, California · 16052 days ago · 3 km deep · 66 km away
  35. 1.67 km ESE of East Foothills, California · 16051 days ago · 2 km deep · 72 km away
  36. 1.73 km ENE of Alamo, California · 16051 days ago · 10 km deep · 13 km away
  37. 1.94 km N of Kenwood, California · 16049 days ago · 5 km deep · 70 km away
  38. 1.96 km ESE of Roseland, California · 16047 days ago · 9 km deep · 73 km away
  39. 2.41 km NE of Danville, California · 16046 days ago · 7 km deep · 16 km away
  40. 1.610 km E of Blackhawk, California · 16045 days ago · 16 km deep · 26 km away
  41. 2.212 km WSW of Byron, California · 16044 days ago · 10 km deep · 29 km away
  42. 1.66 km WSW of Eldridge, California · 16044 days ago · 8 km deep · 62 km away
  43. 1.66 km S of Calistoga, California · 16043 days ago · 6 km deep · 78 km away
  44. 2.312 km NE of Morgan Hill, California · 16042 days ago · 6 km deep · 95 km away
  45. 1.710 km ESE of Hidden Valley Lake, California · 16038 days ago · 6 km deep · 96 km away
  46. 1.610 km S of Muir Beach, California · 16037 days ago · 13 km deep · 53 km away
  47. 1.87 km S of Sunol, California · 16035 days ago · 7 km deep · 51 km away
  48. 1.710 km SE of Livermore, California · 16032 days ago · 4 km deep · 50 km away
  49. 2.13 km SSW of Green Valley, California · 16029 days ago · 11 km deep · 31 km away
  50. 3.23 km W of Moskowite Corner, California · 16028 days ago · 8 km deep · 55 km away

Before

  1. 1.98 km ENE of Milpitas, California · 16088 days ago · 2 km deep · 60 km away
  2. 1.72 km E of East Foothills, California · 16089 days ago · 4 km deep · 69 km away
  3. 1.70 km N of Pittsburg, California · 16093 days ago · 16 km deep · 14 km away
  4. 2.31 km SSE of Concord, California · 16093 days ago · 12 km deep · 1 km away
  5. 1.65 km WSW of Green Valley, California · 16094 days ago · 5 km deep · 34 km away
  6. 2.03 km NE of Fremont, California · 16095 days ago · 9 km deep · 45 km away
  7. 1.55 km NNE of Kenwood, California · 16096 days ago · 5 km deep · 69 km away
  8. 1.810 km E of Blackhawk, California · 16097 days ago · 10 km deep · 26 km away
  9. 1.610 km E of Blackhawk, California · 16097 days ago · 10 km deep · 26 km away
  10. 2.611 km E of Blackhawk, California · 16097 days ago · 14 km deep · 27 km away
  11. 2.311 km E of Blackhawk, California · 16097 days ago · 11 km deep · 27 km away
  12. 3.812 km E of Blackhawk, California · 16097 days ago · 15 km deep · 27 km away
  13. 1.710 km E of Blackhawk, California · 16097 days ago · 10 km deep · 26 km away
  14. 1.814 km E of East Foothills, California · 16097 days ago · 5 km deep · 71 km away
  15. 1.91 km N of Orinda, California · 16099 days ago · 6 km deep · 16 km away
  16. 3.98 km N of East Foothills, California · 16100 days ago · 6 km deep · 60 km away
  17. 1.87 km E of East Foothills, California · 16101 days ago · 9 km deep · 70 km away
  18. 1.92 km NNW of Kensington, California · 16101 days ago · 9 km deep · 24 km away
  19. 1.714 km NNE of Morgan Hill, California · 16101 days ago · 7 km deep · 89 km away
  20. 1.813 km SE of Livermore, California · 16103 days ago · 6 km deep · 53 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1078608. Read Wed, Sep 23, 2026, 12:55 AM UTC.