California earthquakes

M2.1 earthquake 5 km SW of Cobb, California

A magnitude 2.1 earthquake struck 5 km SW of Cobb, California on Mon, Sep 16, 1985, 3:25 AM PDT (10:25 UTC), -1 km (-1 mi) below the surface.

A larger quake followed: M4.1 5 km NW of Cobb, California. This one was a foreshock.

Cobb 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
2.1 (md), micro
Local time
UTC
1985-09-16 10:25:43 UTC
Depth
-0.9 km (-0.6 mi), shallow
Epicenter
38.788° N, 122.768° 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, 0.5 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
40°
Stations used
19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 176 in the 60 days after this one and 134 in the 30 days before it.

After

  1. 1.95 km SW of Cobb, California · 14987 days ago · 0 km deep · 0 km away
  2. 1.76 km W of Cobb, California · 14987 days ago · 2 km deep · 4 km away
  3. 1.95 km SW of Cobb, California · 14987 days ago · 0 km deep · 0 km away
  4. 1.910 km NNW of Moskowite Corner, California · 14987 days ago · 9 km deep · 55 km away
  5. 1.86 km WSW of Cobb, California · 14987 days ago · 4 km deep · 3 km away
  6. 2.110 km E of Comptche, California · 14987 days ago · 8 km deep · 79 km away
  7. 1.65 km SW of Cobb, California · 14987 days ago · 0 km deep · 0 km away
  8. 2.55 km SW of Cobb, California · 14986 days ago · 1 km deep · 0 km away
  9. 2.55 km ENE of Williams, California · 14986 days ago · 10 km deep · 72 km away
  10. 2.09 km WNW of Arbuckle, California · 14986 days ago · 5 km deep · 62 km away
  11. 2.07 km ESE of Williams, California · 14986 days ago · 8 km deep · 71 km away
  12. 2.36 km ENE of Williams, California · 14986 days ago · 16 km deep · 73 km away
  13. 1.66 km SW of Cobb, California · 14986 days ago · 0 km deep · 1 km away
  14. 1.85 km E of Clearlake Oaks, California · 14985 days ago · -1 km deep · 30 km away
  15. 2.14 km SW of Cobb, California · 14984 days ago · -1 km deep · 1 km away
  16. 1.610 km NW of Cobb, California · 14984 days ago · 1 km deep · 11 km away
  17. 1.86 km WSW of Cobb, California · 14984 days ago · 1 km deep · 4 km away
  18. 1.97 km W of Cobb, California · 14984 days ago · 0 km deep · 5 km away
  19. 2.16 km W of Cobb, California · 14984 days ago · 1 km deep · 6 km away
  20. 1.86 km SW of Hopland, California · 14983 days ago · 4 km deep · 39 km away
  21. 2.27 km W of Cobb, California · 14983 days ago · 3 km deep · 4 km away
  22. 1.95 km SW of Cobb, California · 14983 days ago · 2 km deep · 0 km away
  23. 2.46 km W of Cobb, California · 14982 days ago · 1 km deep · 5 km away
  24. 1.99 km W of Cobb, California · 14981 days ago · 0 km deep · 7 km away
  25. 1.57 km WSW of Cobb, California · 14981 days ago · 0 km deep · 4 km away
  26. 1.63 km SW of Cobb, California · 14981 days ago · 1 km deep · 2 km away
  27. 1.57 km W of Cobb, California · 14980 days ago · 1 km deep · 5 km away
  28. 1.65 km WSW of Cobb, California · 14980 days ago · 1 km deep · 2 km away
  29. 1.85 km NNE of Windsor, California · 14980 days ago · 5 km deep · 22 km away
  30. 2.36 km NNE of Windsor, California · 14980 days ago · 1 km deep · 21 km away
  31. 2.510 km N of Cloverdale, California · 14980 days ago · -1 km deep · 24 km away
  32. 3.15 km WSW of Cobb, California · 14979 days ago · -1 km deep · 2 km away
  33. 1.95 km WSW of Cobb, California · 14979 days ago · 0 km deep · 1 km away
  34. 1.64 km S of Cobb, California · 14979 days ago · 2 km deep · 4 km away
  35. 2.55 km SW of Cobb, California · 14979 days ago · 0 km deep · 1 km away
  36. 2.19 km ENE of Hopland, California · 14979 days ago · 23 km deep · 31 km away
  37. 2.05 km S of Moskowite Corner, California · 14978 days ago · 8 km deep · 65 km away
  38. 2.47 km W of Cobb, California · 14978 days ago · 3 km deep · 5 km away
  39. 1.75 km SW of Cobb, California · 14978 days ago · 1 km deep · 1 km away
  40. 1.97 km ENE of Clearlake, California · 14978 days ago · 3 km deep · 29 km away
  41. 1.77 km W of Cobb, California · 14978 days ago · 3 km deep · 5 km away
  42. 2.52 km E of Moskowite Corner, California · 14978 days ago · 4 km deep · 65 km away
  43. 1.63 km NE of Santa Rosa, California · 14977 days ago · 2 km deep · 37 km away
  44. 2.28 km W of Cobb, California · 14976 days ago · 1 km deep · 6 km away
  45. 1.51 km ESE of Clear Lake Riviera, California · 14976 days ago · 1 km deep · 19 km away
  46. 1.64 km ESE of Moskowite Corner, California · 14976 days ago · 5 km deep · 68 km away
  47. 1.62 km E of Rodeo, California · 14976 days ago · 4 km deep · 96 km away
  48. 2.06 km W of Cobb, California · 14975 days ago · 2 km deep · 4 km away
  49. 1.76 km W of Cobb, California · 14975 days ago · 3 km deep · 5 km away
  50. 1.74 km S of Cobb, California · 14975 days ago · 2 km deep · 4 km away
  51. 1.64 km S of Cobb, California · 14975 days ago · 2 km deep · 4 km away
  52. 1.65 km SW of Cobb, California · 14974 days ago · 1 km deep · 1 km away
  53. 2.019 km N of Upper Lake, California · 14974 days ago · 5 km deep · 62 km away
  54. 1.89 km W of Cobb, California · 14972 days ago · 0 km deep · 6 km away
  55. 1.74 km WSW of Cobb, California · 14972 days ago · 1 km deep · 2 km away
  56. 1.98 km WSW of Cobb, California · 14971 days ago · 1 km deep · 4 km away
  57. 1.64 km SE of Larkfield-Wikiup, California · 14971 days ago · 8 km deep · 34 km away
  58. 1.812 km WNW of Calistoga, California · 14971 days ago · 8 km deep · 18 km away
  59. 2.58 km W of Cobb, California · 14969 days ago · 1 km deep · 6 km away
  60. 1.64 km NW of Redwood Valley, California · 14969 days ago · 7 km deep · 69 km away

The first 60 of 176.

Before

  1. 3.67 km W of Cobb, California · 14988 days ago · 10 km deep · 6 km away
  2. 1.66 km W of Cobb, California · 14988 days ago · 3 km deep · 4 km away
  3. 1.86 km E of Williams, California · 14988 days ago · 4 km deep · 73 km away
  4. 2.05 km NE of Williams, California · 14988 days ago · 18 km deep · 73 km away
  5. 1.78 km WNW of Cobb, California · 14988 days ago · -1 km deep · 9 km away
  6. 1.66 km WNW of Cobb, California · 14988 days ago · 1 km deep · 5 km away
  7. 1.86 km W of Cobb, California · 14988 days ago · 3 km deep · 5 km away
  8. 2.36 km W of Cobb, California · 14989 days ago · 3 km deep · 5 km away
  9. 1.94 km WSW of Cobb, California · 14989 days ago · 1 km deep · 2 km away
  10. 1.612 km NE of Upper Lake, California · 14989 days ago · 4 km deep · 51 km away
  11. 1.85 km W of Cobb, California · 14989 days ago · 0 km deep · 3 km away
  12. 1.812 km NE of Upper Lake, California · 14990 days ago · 2 km deep · 50 km away
  13. 1.65 km W of Cobb, California · 14990 days ago · 1 km deep · 4 km away
  14. 2.44 km E of Williams, California · 14990 days ago · 16 km deep · 71 km away
  15. 1.68 km W of Cobb, California · 14990 days ago · 1 km deep · 6 km away
  16. 1.64 km W of Cobb, California · 14990 days ago · 0 km deep · 4 km away
  17. 2.512 km NE of Upper Lake, California · 14990 days ago · 3 km deep · 50 km away
  18. 1.66 km W of Cobb, California · 14990 days ago · 0 km deep · 5 km away
  19. 2.2Northern California · 14991 days ago · 2 km deep · 50 km away
  20. 2.16 km NE of Windsor, California · 14991 days ago · 5 km deep · 22 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc55173. Read Mon, Sep 28, 2026, 6:28 PM UTC.