California earthquakes

M1.6 earthquake 7 km WSW of Cobb, California

A magnitude 1.6 earthquake struck 7 km WSW of Cobb, California on Tue, Dec 19, 1978, 7:52 AM PST (15:52 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M3.0 8 km E of Willits, 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1978-12-19 15:52:42 UTC
Depth
1.0 km (0.6 mi), shallow
Epicenter
38.808° N, 122.808° 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, 0.3 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
64°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 62 in the 60 days after this one and 45 in the 30 days before it.

After

  1. 2.411 km ESE of Hidden Valley Lake, California · 17452 days ago · 10 km deep · 33 km away
  2. 1.99 km ENE of Brooktrails, California · 17450 days ago · 9 km deep · 85 km away
  3. 2.519 km NNE of Upper Lake, California · 17450 days ago · 7 km deep · 56 km away
  4. 1.917 km SW of Hopland, California · 17449 days ago · 1 km deep · 40 km away
  5. 1.98 km WSW of Cobb, California · 17449 days ago · 1 km deep · 1 km away
  6. 1.610 km ESE of Hidden Valley Lake, California · 17448 days ago · 6 km deep · 31 km away
  7. 1.68 km WSW of Cobb, California · 17447 days ago · 1 km deep · 1 km away
  8. 2.16 km E of Willits, California · 17447 days ago · 1 km deep · 79 km away
  9. 1.67 km WSW of Cobb, California · 17446 days ago · 2 km deep · 1 km away
  10. 1.76 km W of Cobb, California · 17445 days ago · 1 km deep · 2 km away
  11. 2.010 km SSE of Willits, California · 17443 days ago · 4 km deep · 72 km away
  12. 1.95 km ESE of Black Point-Green Point, California · 17443 days ago · 5 km deep · 84 km away
  13. 1.98 km WSW of Cobb, California · 17443 days ago · 1 km deep · 1 km away
  14. 1.96 km W of Cobb, California · 17443 days ago · 3 km deep · 1 km away
  15. 2.23 km W of Deer Park, California · 17442 days ago · 8 km deep · 39 km away
  16. 2.07 km WSW of Cobb, California · 17440 days ago · 1 km deep · 1 km away
  17. 1.67 km WSW of Cobb, California · 17438 days ago · 3 km deep · 1 km away
  18. 1.51 km WSW of Moskowite Corner, California · 17438 days ago · 12 km deep · 66 km away
  19. 1.927 km SE of Covelo, California · 17433 days ago · 0 km deep · 90 km away
  20. 1.67 km W of Healdsburg, California · 17433 days ago · 1 km deep · 24 km away
  21. 2.45 km E of Black Point-Green Point, California · 17431 days ago · 12 km deep · 83 km away
  22. 1.66 km W of Cobb, California · 17431 days ago · 4 km deep · 1 km away
  23. 1.87 km W of Cobb, California · 17428 days ago · 3 km deep · 1 km away
  24. 1.76 km W of Cobb, California · 17428 days ago · 4 km deep · 1 km away
  25. 2.52 km SSW of Monument Hills, California · 17424 days ago · 10 km deep · 82 km away
  26. 2.76 km W of Cobb, California · 17422 days ago · 0 km deep · 2 km away
  27. 1.76 km W of Cobb, California · 17422 days ago · 0 km deep · 2 km away
  28. 1.58 km WSW of Cobb, California · 17422 days ago · 1 km deep · 1 km away
  29. 2.99 km WNW of Princeton, California · 17420 days ago · 15 km deep · 91 km away
  30. 1.67 km WSW of Cobb, California · 17418 days ago · 2 km deep · 0 km away
  31. 1.65 km W of Cobb, California · 17418 days ago · 1 km deep · 3 km away
  32. 1.87 km W of Cobb, California · 17417 days ago · 4 km deep · 1 km away
  33. 2.04 km NNW of Winters, California · 17416 days ago · 2 km deep · 76 km away
  34. 1.58 km ENE of Santa Rosa, California · 17415 days ago · 0 km deep · 40 km away
  35. 2.54 km SSE of Dunnigan, California · 17415 days ago · 8 km deep · 74 km away
  36. 2.08 km E of Willits, California · 17414 days ago · 7 km deep · 76 km away
  37. 1.68 km W of Cobb, California · 17413 days ago · 1 km deep · 2 km away
  38. 2.07 km W of Cobb, California · 17412 days ago · 3 km deep · 1 km away
  39. 3.08 km E of Willits, California · 17411 days ago · 8 km deep · 77 km away
  40. 2.68 km E of Willits, California · 17411 days ago · 9 km deep · 77 km away
  41. 2.06 km W of Cobb, California · 17411 days ago · 4 km deep · 1 km away
  42. 1.95 km ESE of Healdsburg, California · 17411 days ago · 6 km deep · 23 km away
  43. 1.67 km W of Cobb, California · 17411 days ago · -1 km deep · 1 km away
  44. 2.54 km WSW of Cobb, California · 17410 days ago · 2 km deep · 3 km away
  45. 1.52 km ENE of Clear Lake Riviera, California · 17410 days ago · 3 km deep · 20 km away
  46. 2.07 km NE of Inverness, California · 17407 days ago · 0 km deep · 74 km away
  47. 2.09 km S of Moskowite Corner, California · 17407 days ago · 7 km deep · 73 km away
  48. 2.57 km W of Cobb, California · 17407 days ago · 4 km deep · 2 km away
  49. 2.410 km SE of Dunnigan, California · 17406 days ago · 9 km deep · 79 km away
  50. 2.78 km WNW of Princeton, California · 17404 days ago · 16 km deep · 92 km away
  51. 2.012 km NE of Brooktrails, California · 17402 days ago · 7 km deep · 91 km away
  52. 1.97 km ENE of Hopland, California · 17402 days ago · 5 km deep · 28 km away
  53. 1.61 km WSW of Guinda, California · 17401 days ago · 5 km deep · 52 km away
  54. 1.74 km WSW of Cobb, California · 17400 days ago · 2 km deep · 4 km away
  55. 1.74 km WSW of Cobb, California · 17400 days ago · 1 km deep · 4 km away
  56. 1.610 km E of Willits, California · 17399 days ago · 2 km deep · 76 km away
  57. 2.923 km NE of Willits, California · 17398 days ago · 5 km deep · 85 km away
  58. 1.77 km ENE of Healdsburg, California · 17397 days ago · 6 km deep · 19 km away
  59. 2.46 km W of Cobb, California · 17395 days ago · 0 km deep · 1 km away
  60. 1.910 km NE of Willits, California · 17395 days ago · 3 km deep · 83 km away

The first 60 of 62.

Before

  1. 1.75 km W of Cobb, California · 17453 days ago · 0 km deep · 3 km away
  2. 2.33 km SE of Calpella, California · 17454 days ago · 6 km deep · 55 km away
  3. 1.611 km ESE of Willits, California · 17457 days ago · 4 km deep · 72 km away
  4. 1.56 km W of Cobb, California · 17457 days ago · 3 km deep · 2 km away
  5. 3.26 km W of Cobb, California · 17457 days ago · 4 km deep · 2 km away
  6. 1.912 km ESE of Hidden Valley Lake, California · 17459 days ago · 8 km deep · 33 km away
  7. 1.810 km SE of Hopland, California · 17459 days ago · 2 km deep · 22 km away
  8. 2.110 km SE of Sonoma, California · 17461 days ago · 7 km deep · 75 km away
  9. 1.77 km W of Cobb, California · 17462 days ago · -1 km deep · 2 km away
  10. 2.0Northern California · 17462 days ago · 8 km deep · 33 km away
  11. 1.7Northern California · 17463 days ago · 18 km deep · 19 km away
  12. 3.46 km WSW of Cobb, California · 17463 days ago · 0 km deep · 1 km away
  13. 1.96 km W of Cobb, California · 17463 days ago · 0 km deep · 2 km away
  14. 1.64 km E of Saint Helena, California · 17464 days ago · 5 km deep · 48 km away
  15. 1.811 km ESE of Willits, California · 17464 days ago · 4 km deep · 72 km away
  16. 1.512 km ESE of Hidden Valley Lake, California · 17464 days ago · 8 km deep · 33 km away
  17. 2.112 km ESE of Hidden Valley Lake, California · 17464 days ago · 8 km deep · 33 km away
  18. 1.56 km W of Cobb, California · 17464 days ago · 3 km deep · 2 km away
  19. 2.39 km WSW of Cobb, California · 17467 days ago · 1 km deep · 2 km away
  20. 1.69 km W of Cobb, California · 17467 days ago · 0 km deep · 2 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1043804. Read Thu, Oct 1, 2026, 12:18 PM UTC.