California earthquakes

M2.5 earthquake 10 km W of Cobb, California

A magnitude 2.5 earthquake struck 10 km W of Cobb, California on Sun, Jul 3, 1977, 7:26 PM PDT (02:26 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.9 6 km WSW 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.

Open the live map with earthquakes

The earthquake

Magnitude
2.5 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1977-07-04 02:26:08 UTC
Depth
-0.2 km (-0.1 mi), shallow
Epicenter
38.833° N, 122.845° 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
±0.15
Depth from
From location
Station coverage gap
51°
Stations used
21

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 61 in the 60 days after this one and 26 in the 30 days before it.

After

  1. 2.5Northern California · 17990 days ago · 10 km deep · 83 km away
  2. 2.13 km NNW of Larkfield-Wikiup, California · 17990 days ago · 4 km deep · 33 km away
  3. 1.710 km W of Cobb, California · 17990 days ago · 1 km deep · 0 km away
  4. 2.512 km NE of Healdsburg, California · 17987 days ago · 3 km deep · 19 km away
  5. 1.97 km ENE of Hidden Valley Lake, California · 17987 days ago · 6 km deep · 32 km away
  6. 2.39 km NE of Hidden Valley Lake, California · 17986 days ago · 6 km deep · 33 km away
  7. 1.66 km WSW of Cobb, California · 17985 days ago · 3 km deep · 5 km away
  8. 2.86 km WSW of Cobb, California · 17984 days ago · 4 km deep · 5 km away
  9. 2.07 km WSW of Cobb, California · 17982 days ago · 0 km deep · 5 km away
  10. 2.17 km W of Cobb, California · 17981 days ago · 3 km deep · 4 km away
  11. 1.97 km WSW of Cobb, California · 17979 days ago · 0 km deep · 5 km away
  12. 1.78 km S of Calistoga, California · 17978 days ago · 6 km deep · 44 km away
  13. 1.57 km W of Cobb, California · 17975 days ago · 0 km deep · 3 km away
  14. 2.07 km WSW of Cobb, California · 17972 days ago · 3 km deep · 6 km away
  15. 1.66 km ESE of Lucerne, California · 17972 days ago · 3 km deep · 29 km away
  16. 2.17 km WSW of Cobb, California · 17971 days ago · 0 km deep · 4 km away
  17. 2.57 km W of Cobb, California · 17971 days ago · 0 km deep · 4 km away
  18. 1.64 km SW of Kenwood, California · 17971 days ago · 9 km deep · 55 km away
  19. 2.96 km WSW of Cobb, California · 17969 days ago · 0 km deep · 5 km away
  20. 1.75 km E of Hopland, California · 17967 days ago · 2 km deep · 23 km away
  21. 2.16 km W of Cobb, California · 17966 days ago · 1 km deep · 5 km away
  22. 2.26 km WSW of Cobb, California · 17966 days ago · 1 km deep · 5 km away
  23. 2.73 km SW of Napa, California · 17964 days ago · 10 km deep · 78 km away
  24. 2.27 km W of Cobb, California · 17961 days ago · 1 km deep · 4 km away
  25. 1.64 km WSW of Cobb, California · 17960 days ago · 2 km deep · 7 km away
  26. 1.68 km WSW of Cobb, California · 17960 days ago · 0 km deep · 4 km away
  27. 1.58 km WSW of Cobb, California · 17960 days ago · 0 km deep · 4 km away
  28. 2.08 km W of Cobb, California · 17957 days ago · -1 km deep · 3 km away
  29. 1.58 km W of Cobb, California · 17957 days ago · 0 km deep · 3 km away
  30. 1.76 km W of Cobb, California · 17956 days ago · 3 km deep · 4 km away
  31. 2.219 km NE of Upper Lake, California · 17956 days ago · 3 km deep · 51 km away
  32. 1.57 km W of Cobb, California · 17955 days ago · 3 km deep · 4 km away
  33. 1.73 km NNE of Clearlake, California · 17955 days ago · 2 km deep · 26 km away
  34. 1.67 km W of Cobb, California · 17954 days ago · 4 km deep · 4 km away
  35. 1.62 km ENE of Clear Lake Riviera, California · 17952 days ago · 1 km deep · 20 km away
  36. 2.214 km NE of Upper Lake, California · 17951 days ago · 10 km deep · 48 km away
  37. 2.110 km NE of Healdsburg, California · 17948 days ago · 5 km deep · 20 km away
  38. 1.78 km W of Cobb, California · 17945 days ago · 1 km deep · 4 km away
  39. 1.64 km WSW of Cobb, California · 17944 days ago · 3 km deep · 8 km away
  40. 1.57 km W of Cobb, California · 17943 days ago · 3 km deep · 4 km away
  41. 1.812 km NE of Healdsburg, California · 17942 days ago · 3 km deep · 20 km away
  42. 1.68 km E of Hidden Valley Lake, California · 17942 days ago · 7 km deep · 34 km away
  43. 2.89 km WSW of Cobb, CA · 17941 days ago · 1 km deep · 4 km away
  44. 2.06 km WSW of Cobb, California · 17941 days ago · 1 km deep · 5 km away
  45. 2.16 km WSW of Cobb, California · 17941 days ago · 1 km deep · 5 km away
  46. 1.96 km WSW of Cobb, California · 17941 days ago · 0 km deep · 5 km away
  47. 1.96 km WSW of Cobb, California · 17941 days ago · -1 km deep · 5 km away
  48. 1.76 km W of Cobb, California · 17940 days ago · 3 km deep · 4 km away
  49. 1.78 km W of Cobb, California · 17938 days ago · 0 km deep · 3 km away
  50. 1.9Northern California · 17938 days ago · 0 km deep · 3 km away
  51. 2.619 km NE of Nice, California · 17938 days ago · 10 km deep · 49 km away
  52. 1.56 km ESE of Hopland, California · 17936 days ago · 6 km deep · 21 km away
  53. 1.68 km WSW of Cobb, California · 17935 days ago · 3 km deep · 4 km away
  54. 2.87 km NNW of Redwood Valley, California · 17934 days ago · 11 km deep · 64 km away
  55. 1.60 km S of Clearlake, California · 17933 days ago · 5 km deep · 23 km away
  56. 1.58 km W of Cobb, California · 17932 days ago · 0 km deep · 2 km away
  57. 2.33 km S of Geyserville, California · 17932 days ago · 6 km deep · 18 km away
  58. 2.016 km NE of Upper Lake, California · 17932 days ago · 2 km deep · 48 km away
  59. 2.97 km WSW of Kenwood, California · 17931 days ago · 11 km deep · 52 km away
  60. 1.97 km WSW of Kenwood, California · 17931 days ago · 10 km deep · 53 km away

The first 60 of 61.

Before

  1. 1.66 km W of Cobb, California · 17992 days ago · 3 km deep · 5 km away
  2. 2.28 km W of Cobb, California · 17993 days ago · 0 km deep · 3 km away
  3. 2.74 km N of Brooktrails, California · 17993 days ago · 11 km deep · 86 km away
  4. 2.06 km W of Cobb, California · 17993 days ago · 1 km deep · 5 km away
  5. 1.68 km W of Cobb, California · 17993 days ago · 3 km deep · 2 km away
  6. 1.613 km ENE of Hidden Valley Lake, California · 17994 days ago · 16 km deep · 38 km away
  7. 2.29 km NW of Moskowite Corner, California · 17994 days ago · 14 km deep · 62 km away
  8. 2.58 km W of Cobb, California · 17994 days ago · 0 km deep · 3 km away
  9. 2.03 km WSW of Calpella, California · 17995 days ago · 10 km deep · 56 km away
  10. 1.68 km SW of Hopland, California · 17997 days ago · 2 km deep · 31 km away
  11. 1.78 km W of Cobb, California · 18000 days ago · 2 km deep · 3 km away
  12. 1.64 km NE of Hopland, California · 18004 days ago · 4 km deep · 28 km away
  13. 2.36 km W of Cobb, California · 18004 days ago · -1 km deep · 5 km away
  14. 1.77 km W of Cobb, California · 18007 days ago · 3 km deep · 3 km away
  15. 2.07 km SSW of Calistoga, California · 18009 days ago · 3 km deep · 40 km away
  16. 1.85 km WSW of Cobb, California · 18011 days ago · 1 km deep · 7 km away
  17. 2.05 km SW of Glen Ellen, California · 18013 days ago · 8 km deep · 60 km away
  18. 2.16 km W of Cobb, California · 18014 days ago · 1 km deep · 4 km away
  19. 1.95 km WSW of Cobb, California · 18014 days ago · 1 km deep · 6 km away
  20. 1.85 km WSW of Glen Ellen, California · 18014 days ago · 7 km deep · 59 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1035683. Read Mon, Oct 5, 2026, 6:34 AM UTC.