California earthquakes

M2.4 earthquake 7 km W of Cobb, California

A magnitude 2.4 earthquake struck 7 km W of Cobb, California on Wed, Oct 20, 1976, 4:58 AM PDT (11:58 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.2 5 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
2.4 (md), micro
Local time
UTC
1976-10-20 11:58:55 UTC
Depth
-0.2 km (-0.1 mi), shallow
Epicenter
38.813° N, 122.807° 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 0.1 km horizontally, 0.5 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
49°
Stations used
25

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 97 in the 60 days after this one and 40 in the 30 days before it.

After

  1. 1.67 km W of Cobb, California · 18240 days ago · 3 km deep · 1 km away
  2. 1.910 km E of Hidden Valley Lake, California · 18239 days ago · 9 km deep · 32 km away
  3. 2.77 km SW of Calistoga, California · 18239 days ago · 6 km deep · 35 km away
  4. 1.66 km W of Cobb, California · 18236 days ago · 3 km deep · 1 km away
  5. 1.76 km W of Cobb, California · 18236 days ago · 3 km deep · 1 km away
  6. 1.67 km SSW of Calistoga, California · 18236 days ago · 6 km deep · 36 km away
  7. 2.17 km NE of Hidden Valley Lake, California · 18234 days ago · 5 km deep · 28 km away
  8. 2.06 km W of Cobb, California · 18233 days ago · 4 km deep · 1 km away
  9. 2.46 km W of Cobb, California · 18232 days ago · 3 km deep · 1 km away
  10. 1.67 km W of Cobb, California · 18230 days ago · 3 km deep · 1 km away
  11. 1.97 km WSW of Cobb, California · 18229 days ago · 4 km deep · 1 km away
  12. 2.16 km WSW of Cobb, California · 18228 days ago · 1 km deep · 1 km away
  13. 1.99 km WNW of Cobb, California · 18228 days ago · 3 km deep · 6 km away
  14. 1.84 km NW of Clearlake, California · 18225 days ago · 1 km deep · 23 km away
  15. 1.910 km E of Hidden Valley Lake, California · 18225 days ago · 10 km deep · 32 km away
  16. 1.58 km W of Cobb, California · 18224 days ago · -1 km deep · 1 km away
  17. 2.57 km W of Cobb, California · 18222 days ago · 3 km deep · 0 km away
  18. 2.45 km SW of Kenwood, California · 18221 days ago · 7 km deep · 52 km away
  19. 3.07 km ESE of Willits, California · 18219 days ago · 11 km deep · 75 km away
  20. 2.515 km SE of Hidden Valley Lake, California · 18218 days ago · 4 km deep · 35 km away
  21. 2.015 km ESE of Hidden Valley Lake, California · 18218 days ago · 6 km deep · 36 km away
  22. 2.214 km ESE of Hidden Valley Lake, California · 18218 days ago · 6 km deep · 35 km away
  23. 1.73 km N of Windsor, California · 18218 days ago · 6 km deep · 26 km away
  24. 1.76 km W of Cobb, California · 18217 days ago · 3 km deep · 1 km away
  25. 2.01 km W of Clearlake, California · 18217 days ago · 0 km deep · 21 km away
  26. 1.62 km WSW of Clearlake, California · 18217 days ago · 5 km deep · 20 km away
  27. 2.01 km ESE of Clear Lake Riviera, California · 18217 days ago · 1 km deep · 18 km away
  28. 1.94 km WSW of Cobb, California · 18216 days ago · 1 km deep · 3 km away
  29. 2.521 km W of Stonyford, California · 18216 days ago · 14 km deep · 64 km away
  30. 2.123 km W of Stonyford, California · 18215 days ago · 1 km deep · 61 km away
  31. 2.56 km W of Cobb, California · 18215 days ago · 3 km deep · 1 km away
  32. 1.97 km WSW of Cobb, California · 18214 days ago · 2 km deep · 1 km away
  33. 1.66 km WSW of Cobb, California · 18213 days ago · 3 km deep · 1 km away
  34. 2.26 km W of Cobb, California · 18212 days ago · 3 km deep · 1 km away
  35. 1.87 km W of Cobb, California · 18207 days ago · 3 km deep · 1 km away
  36. 1.98 km W of Cobb, California · 18207 days ago · 0 km deep · 2 km away
  37. 1.84 km WSW of Cobb, California · 18206 days ago · 2 km deep · 3 km away
  38. 2.515 km NE of Nice, California · 18206 days ago · 8 km deep · 46 km away
  39. 2.516 km NE of Nice, California · 18206 days ago · 11 km deep · 48 km away
  40. 2.317 km NE of Nice, California · 18206 days ago · 9 km deep · 47 km away
  41. 2.215 km NE of Nice, California · 18206 days ago · 8 km deep · 46 km away
  42. 2.27 km SW of Stonyford, California · 18206 days ago · 7 km deep · 60 km away
  43. 2.74 km W of Stonyford, California · 18206 days ago · 14 km deep · 66 km away
  44. 1.96 km NNE of Lucerne, California · 18206 days ago · 5 km deep · 37 km away
  45. 1.616 km NE of Nice, California · 18206 days ago · 3 km deep · 47 km away
  46. 2.117 km NE of Nice, California · 18206 days ago · 9 km deep · 48 km away
  47. 2.214 km NE of Nice, California · 18206 days ago · 9 km deep · 45 km away
  48. 2.218 km WSW of Lodoga, California · 18206 days ago · 8 km deep · 50 km away
  49. 1.811 km NE of Nice, California · 18206 days ago · 8 km deep · 42 km away
  50. 2.117 km NE of Nice, California · 18206 days ago · 7 km deep · 48 km away
  51. 1.92 km ESE of Boonville, California · 18205 days ago · 5 km deep · 51 km away
  52. 1.58 km WSW of Cobb, California · 18204 days ago · 4 km deep · 2 km away
  53. 2.411 km NE of Upper Lake, California · 18203 days ago · 8 km deep · 46 km away
  54. 2.112 km ENE of Clearlake, California · 18203 days ago · 17 km deep · 34 km away
  55. 2.06 km WSW of Cobb, California · 18203 days ago · 4 km deep · 1 km away
  56. 2.27 km W of Cobb, California · 18202 days ago · 4 km deep · 0 km away
  57. 2.011 km NE of Healdsburg, California · 18201 days ago · 6 km deep · 16 km away
  58. 2.84 km WSW of Cobb, California · 18201 days ago · 4 km deep · 3 km away
  59. 1.67 km W of Cobb, California · 18201 days ago · 3 km deep · 1 km away
  60. 1.54 km E of Soda Bay, California · 18201 days ago · -1 km deep · 22 km away

The first 60 of 97.

Before

  1. 1.76 km W of Cobb, California · 18241 days ago · 3 km deep · 1 km away
  2. 1.66 km W of Cobb, California · 18241 days ago · 3 km deep · 1 km away
  3. 1.66 km W of Cobb, California · 18243 days ago · 5 km deep · 1 km away
  4. 2.47 km SSW of Calistoga, California · 18245 days ago · 7 km deep · 36 km away
  5. 1.86 km WSW of Cobb, California · 18247 days ago · 3 km deep · 1 km away
  6. 1.67 km WSW of Cobb, California · 18248 days ago · 3 km deep · 2 km away
  7. 2.06 km W of Cobb, California · 18249 days ago · 3 km deep · 1 km away
  8. 1.56 km W of Cobb, California · 18249 days ago · 3 km deep · 1 km away
  9. 2.56 km W of Cobb, California · 18249 days ago · 4 km deep · 1 km away
  10. 1.67 km W of Cobb, California · 18250 days ago · 3 km deep · 0 km away
  11. 1.76 km NW of Cobb, California · 18251 days ago · 2 km deep · 7 km away
  12. 1.79 km SE of Hopland, California · 18252 days ago · 1 km deep · 23 km away
  13. 2.54 km SSE of Clear Lake Riviera, California · 18252 days ago · 4 km deep · 15 km away
  14. 1.75 km E of Hopland, California · 18253 days ago · 5 km deep · 28 km away
  15. 1.77 km W of Cobb, California · 18254 days ago · 1 km deep · 1 km away
  16. 1.77 km W of Cobb, California · 18254 days ago · -1 km deep · 0 km away
  17. 2.38 km W of Healdsburg, California · 18254 days ago · 0 km deep · 25 km away
  18. 1.71 km NE of Clear Lake Riviera, California · 18256 days ago · 0 km deep · 19 km away
  19. 1.64 km WSW of Cobb, California · 18256 days ago · 1 km deep · 4 km away
  20. 1.76 km W of Cobb, California · 18257 days ago · 3 km deep · 1 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1031981. Read Tue, Sep 29, 2026, 8:59 AM UTC.