California earthquakes

M1.6 earthquake 7 km W of Cobb, California

A magnitude 1.6 earthquake struck 7 km W of Cobb, California on Mon, Nov 28, 1983, 4:54 AM PST (12:54 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.4 14 km N of Brooktrails, 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
1983-11-28 12:54:02 UTC
Depth
2.6 km (1.6 mi), shallow
Epicenter
38.814° N, 122.803° 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
±0.07
Depth from
From location
Station coverage gap
80°
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 171 in the 60 days after this one and 127 in the 30 days before it.

After

  1. 2.16 km WSW of Cobb, California · 15648 days ago · 1 km deep · 1 km away
  2. 1.919 km ENE of Potter Valley, California · 15648 days ago · 7 km deep · 62 km away
  3. 1.51 km NNW of Calpella, California · 15648 days ago · 6 km deep · 60 km away
  4. 1.67 km W of Cobb, California · 15648 days ago · 0 km deep · 1 km away
  5. 1.612 km NNW of Moskowite Corner, California · 15647 days ago · 18 km deep · 58 km away
  6. 1.57 km W of Cobb, California · 15646 days ago · 3 km deep · 1 km away
  7. 2.68 km E of Willits, California · 15646 days ago · 4 km deep · 76 km away
  8. 1.67 km W of Cobb, California · 15646 days ago · 3 km deep · 1 km away
  9. 1.63 km ESE of Moskowite Corner, California · 15645 days ago · 7 km deep · 70 km away
  10. 2.13 km SE of Calpella, California · 15645 days ago · 2 km deep · 55 km away
  11. 2.12 km SE of Calpella, California · 15645 days ago · 5 km deep · 55 km away
  12. 1.620 km NE of Potter Valley, California · 15644 days ago · 10 km deep · 72 km away
  13. 1.817 km E of Lower Lake, California · 15644 days ago · 3 km deep · 37 km away
  14. 1.95 km WSW of Cobb, California · 15643 days ago · -1 km deep · 2 km away
  15. 2.04 km SW of Cobb, California · 15643 days ago · 1 km deep · 4 km away
  16. 2.05 km WSW of Cobb, California · 15643 days ago · 0 km deep · 2 km away
  17. 1.97 km E of Penngrove, California · 15643 days ago · 4 km deep · 61 km away
  18. 1.77 km W of Cobb, California · 15643 days ago · 2 km deep · 1 km away
  19. 1.94 km W of Cobb, California · 15643 days ago · -1 km deep · 3 km away
  20. 1.76 km W of Cobb, California · 15642 days ago · 2 km deep · 2 km away
  21. 1.66 km W of Cobb, California · 15642 days ago · 3 km deep · 1 km away
  22. 2.45 km E of Willits, California · 15642 days ago · 4 km deep · 79 km away
  23. 2.45 km ENE of Willits, California · 15641 days ago · 2 km deep · 80 km away
  24. 1.56 km W of Cobb, California · 15641 days ago · 3 km deep · 1 km away
  25. 1.76 km W of Cobb, California · 15641 days ago · 3 km deep · 1 km away
  26. 1.77 km WSW of Cobb, California · 15641 days ago · 1 km deep · 1 km away
  27. 1.67 km W of Cobb, California · 15640 days ago · 3 km deep · 1 km away
  28. 1.57 km E of Willits, California · 15640 days ago · 9 km deep · 77 km away
  29. 1.57 km W of Cobb, California · 15640 days ago · 3 km deep · 0 km away
  30. 1.76 km W of Cobb, California · 15640 days ago · 3 km deep · 0 km away
  31. 1.714 km NNE of Angwin, California · 15640 days ago · 9 km deep · 39 km away
  32. 1.68 km W of Cobb, California · 15639 days ago · 0 km deep · 2 km away
  33. 2.76 km WSW of Cobb, California · 15639 days ago · 0 km deep · 2 km away
  34. 1.6Northern California · 15639 days ago · 1 km deep · 9 km away
  35. 1.77 km WSW of Cobb, California · 15638 days ago · 0 km deep · 1 km away
  36. 1.87 km WSW of Cobb, California · 15638 days ago · -1 km deep · 2 km away
  37. 1.918 km E of Potter Valley, California · 15638 days ago · 8 km deep · 59 km away
  38. 2.47 km WSW of Cobb, California · 15637 days ago · 0 km deep · 1 km away
  39. 2.28 km WSW of Cobb, California · 15637 days ago · 3 km deep · 2 km away
  40. 1.77 km WSW of Cobb, California · 15637 days ago · 0 km deep · 1 km away
  41. 2.67 km WSW of Cobb, California · 15637 days ago · 1 km deep · 1 km away
  42. 1.77 km WSW of Cobb, California · 15637 days ago · 1 km deep · 2 km away
  43. 1.85 km SSW of Cobb, California · 15637 days ago · -1 km deep · 7 km away
  44. 2.86 km W of Cobb, California · 15636 days ago · 3 km deep · 0 km away
  45. 2.56 km E of Penngrove, California · 15636 days ago · 5 km deep · 61 km away
  46. 2.16 km W of Cobb, California · 15636 days ago · 3 km deep · 1 km away
  47. 1.94 km W of Cobb, California · 15636 days ago · 0 km deep · 2 km away
  48. 1.69 km W of Cobb, California · 15636 days ago · 1 km deep · 3 km away
  49. 2.610 km WSW of Hopland, California · 15635 days ago · 2 km deep · 39 km away
  50. 3.414 km N of Brooktrails, California · 15635 days ago · 6 km deep · 98 km away
  51. 2.010 km WSW of Hopland, California · 15635 days ago · 2 km deep · 39 km away
  52. 2.311 km ESE of Potter Valley, California · 15634 days ago · 6 km deep · 55 km away
  53. 1.87 km WSW of Cobb, California · 15634 days ago · 1 km deep · 2 km away
  54. 1.88 km NE of Willits, California · 15633 days ago · 7 km deep · 83 km away
  55. 3.17 km W of Cobb, California · 15633 days ago · 0 km deep · 1 km away
  56. 2.07 km WSW of Cobb, California · 15633 days ago · 0 km deep · 1 km away
  57. 2.010 km ENE of Woodland, California · 15632 days ago · 14 km deep · 100 km away
  58. 1.79 km ESE of Hidden Valley Lake, California · 15632 days ago · 6 km deep · 30 km away
  59. 1.56 km W of Cobb, California · 15632 days ago · 3 km deep · 1 km away
  60. 2.08 km WSW of Cobb, California · 15632 days ago · 1 km deep · 2 km away

The first 60 of 171.

Before

  1. 2.36 km W of Cobb, California · 15648 days ago · 3 km deep · 1 km away
  2. 2.16 km W of Cobb, California · 15648 days ago · 3 km deep · 1 km away
  3. 1.62 km ESE of North Lakeport, California · 15649 days ago · 18 km deep · 30 km away
  4. 2.26 km W of Cobb, California · 15649 days ago · 1 km deep · 0 km away
  5. 2.66 km W of Cobb, California · 15649 days ago · 0 km deep · 1 km away
  6. 2.23 km S of Clear Lake Riviera, California · 15650 days ago · 3 km deep · 14 km away
  7. 3.06 km WSW of Cobb, California · 15650 days ago · 3 km deep · 1 km away
  8. 1.88 km W of Cobb, California · 15650 days ago · -1 km deep · 1 km away
  9. 1.78 km W of Cobb, California · 15650 days ago · 1 km deep · 1 km away
  10. 2.4Northern California · 15650 days ago · 1 km deep · 1 km away
  11. 1.67 km W of Cobb, California · 15650 days ago · 1 km deep · 1 km away
  12. 2.013 km NNE of Brooktrails, California · 15650 days ago · 2 km deep · 95 km away
  13. 1.67 km WSW of Cobb, California · 15650 days ago · 1 km deep · 1 km away
  14. 1.78 km W of Cobb, California · 15650 days ago · -1 km deep · 2 km away
  15. 2.57 km WSW of Cobb, California · 15650 days ago · 1 km deep · 1 km away
  16. 2.018 km NE of Upper Lake, California · 15651 days ago · 7 km deep · 54 km away
  17. 1.66 km W of Cobb, California · 15651 days ago · 1 km deep · 1 km away
  18. 2.16 km WSW of Cobb, California · 15651 days ago · 3 km deep · 2 km away
  19. 1.65 km WSW of Cobb, California · 15651 days ago · 1 km deep · 2 km away
  20. 1.77 km W of Cobb, California · 15651 days ago · 3 km deep · 0 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1107622. Read Thu, Oct 1, 2026, 4:16 PM UTC.