California earthquakes

M2.1 earthquake 6 km WSW of Cobb, California

A magnitude 2.1 earthquake struck 6 km WSW of Cobb, California on Mon, Nov 28, 1983, 10:37 AM PST (18:37 UTC), 1 km (0 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
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-11-28 18:37:03 UTC
Depth
0.7 km (0.4 mi), shallow
Epicenter
38.807° N, 122.794° 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
±0.16
Depth from
From location
Station coverage gap
61°
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: 170 in the 60 days after this one and 126 in the 30 days before it.

After

  1. 1.919 km ENE of Potter Valley, California · 15648 days ago · 7 km deep · 63 km away
  2. 1.51 km NNW of Calpella, California · 15648 days ago · 6 km deep · 61 km away
  3. 1.67 km W of Cobb, California · 15648 days ago · 0 km deep · 2 km away
  4. 1.612 km NNW of Moskowite Corner, California · 15647 days ago · 18 km deep · 57 km away
  5. 1.57 km W of Cobb, California · 15646 days ago · 3 km deep · 1 km away
  6. 2.68 km E of Willits, California · 15646 days ago · 4 km deep · 77 km away
  7. 1.67 km W of Cobb, California · 15646 days ago · 3 km deep · 1 km away
  8. 1.63 km ESE of Moskowite Corner, California · 15646 days ago · 7 km deep · 69 km away
  9. 2.13 km SE of Calpella, California · 15645 days ago · 2 km deep · 56 km away
  10. 2.12 km SE of Calpella, California · 15645 days ago · 5 km deep · 56 km away
  11. 1.620 km NE of Potter Valley, California · 15645 days ago · 10 km deep · 73 km away
  12. 1.817 km E of Lower Lake, California · 15644 days ago · 3 km deep · 36 km away
  13. 1.95 km WSW of Cobb, California · 15644 days ago · -1 km deep · 1 km away
  14. 2.04 km SW of Cobb, California · 15644 days ago · 1 km deep · 3 km away
  15. 2.05 km WSW of Cobb, California · 15644 days ago · 0 km deep · 1 km away
  16. 1.97 km E of Penngrove, California · 15644 days ago · 4 km deep · 60 km away
  17. 1.77 km W of Cobb, California · 15643 days ago · 2 km deep · 2 km away
  18. 1.94 km W of Cobb, California · 15643 days ago · -1 km deep · 3 km away
  19. 1.76 km W of Cobb, California · 15643 days ago · 2 km deep · 2 km away
  20. 1.66 km W of Cobb, California · 15642 days ago · 3 km deep · 1 km away
  21. 2.45 km E of Willits, California · 15642 days ago · 4 km deep · 81 km away
  22. 2.45 km ENE of Willits, California · 15642 days ago · 2 km deep · 81 km away
  23. 1.56 km W of Cobb, California · 15642 days ago · 3 km deep · 2 km away
  24. 1.76 km W of Cobb, California · 15642 days ago · 3 km deep · 2 km away
  25. 1.77 km WSW of Cobb, California · 15641 days ago · 1 km deep · 1 km away
  26. 1.67 km W of Cobb, California · 15640 days ago · 3 km deep · 2 km away
  27. 1.57 km E of Willits, California · 15640 days ago · 9 km deep · 78 km away
  28. 1.57 km W of Cobb, California · 15640 days ago · 3 km deep · 1 km away
  29. 1.76 km W of Cobb, California · 15640 days ago · 3 km deep · 1 km away
  30. 1.714 km NNE of Angwin, California · 15640 days ago · 9 km deep · 38 km away
  31. 1.68 km W of Cobb, California · 15640 days ago · 0 km deep · 3 km away
  32. 2.76 km WSW of Cobb, California · 15639 days ago · 0 km deep · 1 km away
  33. 1.6Northern California · 15639 days ago · 1 km deep · 10 km away
  34. 1.77 km WSW of Cobb, California · 15639 days ago · 0 km deep · 1 km away
  35. 1.87 km WSW of Cobb, California · 15639 days ago · -1 km deep · 1 km away
  36. 1.918 km E of Potter Valley, California · 15639 days ago · 8 km deep · 60 km away
  37. 2.47 km WSW of Cobb, California · 15638 days ago · 0 km deep · 1 km away
  38. 2.28 km WSW of Cobb, California · 15637 days ago · 3 km deep · 2 km away
  39. 1.77 km WSW of Cobb, California · 15637 days ago · 0 km deep · 1 km away
  40. 2.67 km WSW of Cobb, California · 15637 days ago · 1 km deep · 1 km away
  41. 1.77 km WSW of Cobb, California · 15637 days ago · 1 km deep · 1 km away
  42. 1.85 km SSW of Cobb, California · 15637 days ago · -1 km deep · 6 km away
  43. 2.86 km W of Cobb, California · 15637 days ago · 3 km deep · 1 km away
  44. 2.56 km E of Penngrove, California · 15636 days ago · 5 km deep · 60 km away
  45. 2.16 km W of Cobb, California · 15636 days ago · 3 km deep · 1 km away
  46. 1.94 km W of Cobb, California · 15636 days ago · 0 km deep · 2 km away
  47. 1.69 km W of Cobb, California · 15636 days ago · 1 km deep · 3 km away
  48. 2.610 km WSW of Hopland, California · 15636 days ago · 2 km deep · 40 km away
  49. 3.414 km N of Brooktrails, California · 15635 days ago · 6 km deep · 99 km away
  50. 2.010 km WSW of Hopland, California · 15635 days ago · 2 km deep · 40 km away
  51. 2.311 km ESE of Potter Valley, California · 15634 days ago · 6 km deep · 56 km away
  52. 1.87 km WSW of Cobb, California · 15634 days ago · 1 km deep · 1 km away
  53. 1.88 km NE of Willits, California · 15634 days ago · 7 km deep · 84 km away
  54. 3.17 km W of Cobb, California · 15634 days ago · 0 km deep · 2 km away
  55. 2.07 km WSW of Cobb, California · 15633 days ago · 0 km deep · 1 km away
  56. 2.010 km ENE of Woodland, California · 15633 days ago · 14 km deep · 99 km away
  57. 2.010 km E of Woodland, California · 15633 days ago · 13 km deep · 100 km away
  58. 1.79 km ESE of Hidden Valley Lake, California · 15633 days ago · 6 km deep · 30 km away
  59. 1.56 km W of Cobb, California · 15632 days ago · 3 km deep · 2 km away
  60. 2.08 km WSW of Cobb, California · 15632 days ago · 1 km deep · 3 km away

The first 60 of 170.

Before

  1. 1.67 km W of Cobb, California · 15649 days ago · 3 km deep · 1 km away
  2. 2.36 km W of Cobb, California · 15649 days ago · 3 km deep · 1 km away
  3. 2.16 km W of Cobb, California · 15649 days ago · 3 km deep · 1 km away
  4. 1.62 km ESE of North Lakeport, California · 15649 days ago · 18 km deep · 31 km away
  5. 2.26 km W of Cobb, California · 15649 days ago · 1 km deep · 1 km away
  6. 2.66 km W of Cobb, California · 15649 days ago · 0 km deep · 1 km away
  7. 2.23 km S of Clear Lake Riviera, California · 15650 days ago · 3 km deep · 14 km away
  8. 3.06 km WSW of Cobb, California · 15650 days ago · 3 km deep · 0 km away
  9. 1.88 km W of Cobb, California · 15650 days ago · -1 km deep · 2 km away
  10. 1.78 km W of Cobb, California · 15650 days ago · 1 km deep · 2 km away
  11. 2.4Northern California · 15651 days ago · 1 km deep · 2 km away
  12. 1.67 km W of Cobb, California · 15651 days ago · 1 km deep · 2 km away
  13. 2.013 km NNE of Brooktrails, California · 15651 days ago · 2 km deep · 96 km away
  14. 1.67 km WSW of Cobb, California · 15651 days ago · 1 km deep · 1 km away
  15. 1.78 km W of Cobb, California · 15651 days ago · -1 km deep · 2 km away
  16. 2.57 km WSW of Cobb, California · 15651 days ago · 1 km deep · 1 km away
  17. 2.018 km NE of Upper Lake, California · 15651 days ago · 7 km deep · 55 km away
  18. 1.66 km W of Cobb, California · 15651 days ago · 1 km deep · 2 km away
  19. 2.16 km WSW of Cobb, California · 15651 days ago · 3 km deep · 1 km away
  20. 1.65 km WSW of Cobb, California · 15651 days ago · 1 km deep · 1 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1107632. Read Fri, Oct 2, 2026, 1:16 AM UTC.