California earthquakes

M2.7 earthquake 1 km W of Rackerby, California

A magnitude 2.7 earthquake struck 1 km W of Rackerby, California on Mon, Oct 4, 1982, 7:23 PM PDT (02:23 UTC), 30 km (19 mi) below the surface.

A larger quake followed: M3.1 Northern California. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.7 (md), micro
Local time
UTC
1982-10-05 02:23:45 UTC
Depth
30.3 km (18.8 mi), shallow
Epicenter
39.441° N, 121.359° 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 14.0 km horizontally, 21.9 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
171°
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 49 in the 60 days after this one and 28 in the 30 days before it.

After

  1. 2.86 km W of Hamilton City, California · 16058 days ago · 19 km deep · 70 km away
  2. 2.23 km S of Hamilton City, California · 16058 days ago · 18 km deep · 64 km away
  3. 1.83 km S of Chester, California · 16054 days ago · 3 km deep · 93 km away
  4. 1.91 km SSE of Chester, California · 16053 days ago · 3 km deep · 96 km away
  5. 2.013 km W of Chester, California · 16053 days ago · 7 km deep · 94 km away
  6. 1.715 km ESE of Mineral, California · 16053 days ago · 3 km deep · 94 km away
  7. 1.914 km W of Chester, California · 16053 days ago · 3 km deep · 96 km away
  8. 1.714 km ENE of Willows, California · 16053 days ago · 23 km deep · 59 km away
  9. 1.913 km W of Chester, California · 16052 days ago · 6 km deep · 94 km away
  10. 1.515 km ESE of Mineral, California · 16051 days ago · 13 km deep · 97 km away
  11. 2.213 km W of Chester, California · 16051 days ago · 9 km deep · 94 km away
  12. 2.313 km W of Chester, California · 16051 days ago · 10 km deep · 95 km away
  13. 1.513 km W of Chester, California · 16051 days ago · 8 km deep · 97 km away
  14. 2.111 km SSW of Sattley, California · 16049 days ago · 6 km deep · 77 km away
  15. 1.913 km W of Chester, California · 16047 days ago · 8 km deep · 95 km away
  16. 1.9Northern California · 16047 days ago · 6 km deep · 96 km away
  17. 2.315 km W of Chester, California · 16047 days ago · 11 km deep · 95 km away
  18. 2.910 km NNW of Sierra City, California · 16047 days ago · 29 km deep · 62 km away
  19. 2.08 km SW of Whitehawk, California · 16044 days ago · 5 km deep · 68 km away
  20. 2.23 km SSW of Chester, California · 16044 days ago · -2 km deep · 93 km away
  21. 2.4Northern California · 16043 days ago · 5 km deep · 100 km away
  22. 2.51 km ENE of Chico, California · 16039 days ago · 21 km deep · 52 km away
  23. 1.712 km SW of Bucks Lake, California · 16039 days ago · 5 km deep · 40 km away
  24. 2.1Northern California · 16038 days ago · 24 km deep · 94 km away
  25. 1.79 km NW of Princeton, California · 16033 days ago · 13 km deep · 64 km away
  26. 1.85 km SSE of Palermo, California · 16030 days ago · 8 km deep · 14 km away
  27. 1.54 km SSE of Palermo, California · 16030 days ago · 8 km deep · 14 km away
  28. 3.05 km SSW of Graeagle, California · 16029 days ago · 6 km deep · 68 km away
  29. 2.512 km NE of Vina, California · 16028 days ago · 0 km deep · 79 km away
  30. 2.58 km ENE of Lincoln, California · 16027 days ago · 8 km deep · 59 km away
  31. 2.68 km ENE of Lincoln, California · 16027 days ago · 9 km deep · 58 km away
  32. 2.38 km ENE of Lincoln, California · 16025 days ago · 9 km deep · 58 km away
  33. 1.72 km NW of Princeton, California · 16023 days ago · 16 km deep · 58 km away
  34. 2.17 km N of Princeton, California · 16016 days ago · 16 km deep · 56 km away
  35. 2.67 km E of Downieville, California · 16015 days ago · 5 km deep · 55 km away
  36. 2.17 km SSE of Sierra City, California · 16012 days ago · 4 km deep · 66 km away
  37. 2.44 km SSW of Greenville, California · 16006 days ago · 16 km deep · 81 km away
  38. 2.17 km SSW of Maxwell, California · 16005 days ago · 9 km deep · 80 km away
  39. 3.0Northern California · 16005 days ago · 14 km deep · 80 km away
  40. 2.011 km W of Williams, California · 16005 days ago · 3 km deep · 87 km away
  41. 1.714 km WSW of Williams, California · 16005 days ago · 9 km deep · 89 km away
  42. 3.1Northern California · 16005 days ago · 14 km deep · 79 km away
  43. 2.37 km WNW of Williams, California · 16005 days ago · 15 km deep · 79 km away
  44. 1.78 km WNW of Williams, California · 16005 days ago · 12 km deep · 82 km away
  45. 2.78 km NW of Williams, California · 16005 days ago · 15 km deep · 79 km away
  46. 2.95 km WNW of Williams, California · 16005 days ago · 11 km deep · 79 km away
  47. 2.99 km WNW of Williams, California · 16005 days ago · 16 km deep · 81 km away
  48. 3.05 km W of Williams, California · 16005 days ago · 12 km deep · 80 km away
  49. 2.64 km WNW of Williams, California · 16005 days ago · 16 km deep · 78 km away

Before

  1. 1.59 km S of Kingvale, California · 16064 days ago · 1 km deep · 82 km away
  2. 2.7Northern California · 16065 days ago · 6 km deep · 14 km away
  3. 2.11 km WNW of Prattville, California · 16067 days ago · 5 km deep · 87 km away
  4. 2.310 km WNW of Cohasset, California · 16067 days ago · 16 km deep · 70 km away
  5. 2.15 km SW of Chester, California · 16067 days ago · 3 km deep · 93 km away
  6. 2.03 km E of Canyondam, California · 16070 days ago · 4 km deep · 86 km away
  7. 1.713 km W of Chester, California · 16074 days ago · 9 km deep · 94 km away
  8. 1.74 km SSW of Hamilton City, California · 16074 days ago · 18 km deep · 64 km away
  9. 1.513 km W of Chester, California · 16074 days ago · 3 km deep · 96 km away
  10. 2.24 km S of Hamilton City, California · 16075 days ago · 17 km deep · 63 km away
  11. 1.613 km W of Chester, California · 16075 days ago · 11 km deep · 94 km away
  12. 2.56 km NNE of Los Molinos, California · 16075 days ago · 16 km deep · 92 km away
  13. 2.37 km SSW of Taylorsville, California · 16075 days ago · 5 km deep · 76 km away
  14. 2.04 km S of Mineral, CA · 16076 days ago · 5 km deep · 99 km away
  15. 1.814 km W of Chester, California · 16076 days ago · 3 km deep · 95 km away
  16. 1.712 km WSW of Chester, California · 16076 days ago · 3 km deep · 94 km away
  17. 1.913 km W of Chester, California · 16076 days ago · 3 km deep · 95 km away
  18. 2.812 km W of Chester, California · 16076 days ago · 10 km deep · 94 km away
  19. 3.22 km W of Hamilton City, California · 16079 days ago · 22 km deep · 67 km away
  20. 1.64 km SW of Hamilton City, California · 16081 days ago · 15 km deep · 67 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1079943. Read Mon, Sep 28, 2026, 12:42 AM UTC.