California earthquakes

M1.6 earthquake 2 km E of Rodeo, California

A magnitude 1.6 earthquake struck 2 km E of Rodeo, California on Fri, Sep 27, 1985, 11:17 PM PDT (06:17 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M3.4 6 km W of Cobb, 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1985-09-28 06:17:22 UTC
Depth
4.2 km (2.6 mi), shallow
Epicenter
38.034° N, 122.240° 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 0.4 km horizontally, 1.1 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
98°
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 128 in the 60 days after this one and 114 in the 30 days before it.

After

  1. 1.916 km E of Seven Trees, California · 14978 days ago · 6 km deep · 99 km away
  2. 2.06 km W of Cobb, California · 14978 days ago · 2 km deep · 100 km away
  3. 1.616 km E of Seven Trees, California · 14978 days ago · 5 km deep · 99 km away
  4. 1.74 km S of Cobb, California · 14978 days ago · 2 km deep · 93 km away
  5. 1.64 km S of Cobb, California · 14977 days ago · 2 km deep · 93 km away
  6. 2.84 km NE of San Leandro, California · 14977 days ago · 11 km deep · 33 km away
  7. 1.76 km NE of East Foothills, California · 14977 days ago · 9 km deep · 79 km away
  8. 1.65 km SW of Cobb, California · 14977 days ago · 1 km deep · 96 km away
  9. 1.615 km N of Morgan Hill, California · 14976 days ago · 8 km deep · 100 km away
  10. 1.74 km WSW of Cobb, California · 14974 days ago · 1 km deep · 97 km away
  11. 1.511 km SSW of Brentwood, California · 14974 days ago · 12 km deep · 46 km away
  12. 1.98 km WSW of Cobb, California · 14973 days ago · 1 km deep · 99 km away
  13. 1.64 km SE of Larkfield-Wikiup, California · 14973 days ago · 8 km deep · 65 km away
  14. 1.812 km WNW of Calistoga, California · 14973 days ago · 8 km deep · 78 km away
  15. 2.34 km WSW of Cobb, California · 14972 days ago · 1 km deep · 97 km away
  16. 1.711 km NW of Moskowite Corner, California · 14971 days ago · 4 km deep · 52 km away
  17. 1.716 km NE of East Foothills, California · 14971 days ago · 8 km deep · 78 km away
  18. 2.25 km WSW of Cobb, California · 14970 days ago · 1 km deep · 98 km away
  19. 1.86 km SSE of Moskowite Corner, California · 14970 days ago · 5 km deep · 40 km away
  20. 2.24 km W of Cobb, California · 14970 days ago · 0 km deep · 99 km away
  21. 1.712 km WSW of Byron, California · 14969 days ago · 10 km deep · 49 km away
  22. 1.88 km WSW of Cobb, California · 14968 days ago · 3 km deep · 98 km away
  23. 1.83 km N of Ashland, California · 14967 days ago · 4 km deep · 36 km away
  24. 2.55 km SW of Cobb, California · 14966 days ago · 0 km deep · 95 km away
  25. 1.95 km SW of Cobb, California · 14966 days ago · 0 km deep · 95 km away
  26. 2.216 km NE of East Foothills, California · 14966 days ago · 8 km deep · 80 km away
  27. 1.57 km WSW of Cobb, California · 14966 days ago · 1 km deep · 97 km away
  28. 2.05 km SW of Cobb, California · 14965 days ago · 2 km deep · 96 km away
  29. 2.67 km WSW of Glen Ellen, California · 14965 days ago · 8 km deep · 45 km away
  30. 2.04 km WSW of Cobb, California · 14964 days ago · 1 km deep · 97 km away
  31. 1.80 km WSW of Concord, California · 14963 days ago · 19 km deep · 19 km away
  32. 2.46 km WSW of Cobb, California · 14962 days ago · -1 km deep · 98 km away
  33. 1.67 km WSW of Cobb, California · 14962 days ago · 1 km deep · 99 km away
  34. 1.66 km W of Cobb, California · 14962 days ago · 3 km deep · 99 km away
  35. 1.55 km WSW of Cobb, California · 14962 days ago · 1 km deep · 98 km away
  36. 1.516 km E of Seven Trees, California · 14962 days ago · 6 km deep · 98 km away
  37. 1.66 km WSW of Cobb, California · 14961 days ago · 4 km deep · 98 km away
  38. 1.77 km WSW of Cobb, California · 14961 days ago · 1 km deep · 99 km away
  39. 1.78 km WSW of Cobb, California · 14960 days ago · 4 km deep · 97 km away
  40. 1.73 km N of Piedmont, California · 14960 days ago · 12 km deep · 20 km away
  41. 1.97 km WSW of Cobb, California · 14959 days ago · 4 km deep · 98 km away
  42. 1.96 km W of Cobb, California · 14958 days ago · 1 km deep · 99 km away
  43. 2.27 km W of Cobb, California · 14957 days ago · 4 km deep · 100 km away
  44. 1.76 km W of Cobb, California · 14957 days ago · 2 km deep · 100 km away
  45. 1.67 km WSW of Cobb, California · 14957 days ago · 0 km deep · 99 km away
  46. 1.814 km E of Seven Trees, California · 14957 days ago · 3 km deep · 96 km away
  47. 1.93 km ESE of Berkeley, California · 14956 days ago · 7 km deep · 19 km away
  48. 1.75 km SW of Cobb, California · 14956 days ago · 1 km deep · 96 km away
  49. 1.86 km WSW of Cobb, California · 14956 days ago · 3 km deep · 99 km away
  50. 2.03 km SW of Cobb, California · 14955 days ago · 2 km deep · 95 km away
  51. 3.46 km W of Cobb, California · 14955 days ago · 3 km deep · 100 km away
  52. 1.94 km WSW of Cobb, California · 14955 days ago · 0 km deep · 97 km away
  53. 1.66 km SW of Cobb, California · 14955 days ago · 0 km deep · 95 km away
  54. 1.66 km SW of Cobb, California · 14955 days ago · 0 km deep · 96 km away
  55. 2.48 km WSW of Cobb, California · 14955 days ago · 2 km deep · 99 km away
  56. 2.04 km WSW of Cobb, California · 14954 days ago · 1 km deep · 98 km away
  57. 1.711 km S of Pescadero, California · 14953 days ago · 15 km deep · 99 km away
  58. 2.15 km SW of Cobb, California · 14953 days ago · 0 km deep · 95 km away
  59. 1.85 km W of Cobb, California · 14953 days ago · 1 km deep · 99 km away
  60. 2.65 km E of Rohnert Park, California · 14952 days ago · 7 km deep · 49 km away

The first 60 of 128.

Before

  1. 1.64 km ESE of Moskowite Corner, California · 14978 days ago · 5 km deep · 44 km away
  2. 1.63 km NE of Santa Rosa, California · 14979 days ago · 2 km deep · 62 km away
  3. 1.810 km ENE of Blackhawk, California · 14980 days ago · 11 km deep · 45 km away
  4. 2.52 km E of Moskowite Corner, California · 14980 days ago · 4 km deep · 46 km away
  5. 1.75 km SW of Cobb, California · 14981 days ago · 1 km deep · 95 km away
  6. 1.82 km E of North Gate, California · 14981 days ago · 12 km deep · 27 km away
  7. 2.05 km S of Moskowite Corner, California · 14981 days ago · 8 km deep · 41 km away
  8. 2.55 km SW of Cobb, California · 14981 days ago · 0 km deep · 95 km away
  9. 1.816 km NE of East Foothills, California · 14981 days ago · 8 km deep · 78 km away
  10. 1.611 km SW of Brentwood, California · 14982 days ago · 15 km deep · 46 km away
  11. 1.64 km S of Cobb, California · 14982 days ago · 2 km deep · 93 km away
  12. 1.95 km WSW of Cobb, California · 14982 days ago · 0 km deep · 97 km away
  13. 3.15 km WSW of Cobb, California · 14982 days ago · -1 km deep · 97 km away
  14. 2.5Northern California · 14982 days ago · 8 km deep · 78 km away
  15. 3.516 km NE of East Foothills, California · 14982 days ago · 9 km deep · 78 km away
  16. 1.516 km NE of East Foothills, California · 14982 days ago · 8 km deep · 78 km away
  17. 2.36 km NNE of Windsor, California · 14982 days ago · 1 km deep · 79 km away
  18. 1.85 km NNE of Windsor, California · 14982 days ago · 5 km deep · 78 km away
  19. 1.65 km WSW of Cobb, California · 14983 days ago · 1 km deep · 98 km away
  20. 1.63 km SW of Cobb, California · 14983 days ago · 1 km deep · 96 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1131763. Read Thu, Oct 1, 2026, 5:49 AM UTC.