California earthquakes

M1.6 earthquake 7 km W of Cobb, California

A magnitude 1.6 earthquake struck 7 km W of Cobb, California on Sun, Nov 30, 1975, 12:28 PM PST (20:28 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M1.9 8 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.

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The earthquake

Magnitude
1.6 (md), micro
Local time
UTC
1975-11-30 20:28:01 UTC
Depth
3.3 km (2.1 mi), shallow
Epicenter
38.818° 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 0.2 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
80°
Stations used
16

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 53 in the 60 days after this one and 24 in the 30 days before it.

After

  1. 1.98 km WSW of Cobb, California · 18559 days ago · 4 km deep · 2 km away
  2. 2.35 km E of Vallejo, California · 18558 days ago · 7 km deep · 95 km away
  3. 1.7Northern California · 18557 days ago · 9 km deep · 24 km away
  4. 3.18 km NNW of Redwood Valley, California · 18555 days ago · 12 km deep · 69 km away
  5. 1.84 km SE of Clear Lake Riviera, California · 18554 days ago · 2 km deep · 16 km away
  6. 1.67 km W of Cobb, California · 18551 days ago · 4 km deep · 1 km away
  7. 2.16 km SSW of Boonville, California · 18551 days ago · 6 km deep · 53 km away
  8. 2.8Northern California · 18548 days ago · 6 km deep · 23 km away
  9. 1.6near the coast of Northern California · 18548 days ago · 6 km deep · 40 km away
  10. 2.33 km NNW of Larkfield-Wikiup, California · 18548 days ago · 4 km deep · 31 km away
  11. 1.64 km NW of Soda Bay, California · 18545 days ago · 3 km deep · 24 km away
  12. 3.16 km W of Cobb, California · 18545 days ago · -1 km deep · 1 km away
  13. 1.66 km W of Cobb, California · 18545 days ago · 4 km deep · 1 km away
  14. 1.9Northern California · 18544 days ago · -1 km deep · 2 km away
  15. 1.67 km W of Cobb, California · 18543 days ago · 3 km deep · 1 km away
  16. 2.48 km WSW of Cobb, California · 18542 days ago · 3 km deep · 2 km away
  17. 2.88 km ESE of Talmage, California · 18542 days ago · 7 km deep · 39 km away
  18. 2.07 km WSW of Hopland, California · 18539 days ago · 5 km deep · 36 km away
  19. 1.67 km WSW of Cobb, California · 18539 days ago · 1 km deep · 2 km away
  20. 2.17 km W of Cobb, California · 18537 days ago · 0 km deep · 2 km away
  21. 2.27 km W of Cobb, California · 18537 days ago · 1 km deep · 0 km away
  22. 2.222 km NE of Potter Valley, California · 18534 days ago · 8 km deep · 70 km away
  23. 3.318 km NE of Upper Lake, California · 18534 days ago · 10 km deep · 54 km away
  24. 2.220 km WSW of Stonyford, California · 18534 days ago · 8 km deep · 56 km away
  25. 2.26 km WSW of Cobb, California · 18532 days ago · 3 km deep · 1 km away
  26. 2.419 km NE of Upper Lake, California · 18532 days ago · 9 km deep · 54 km away
  27. 1.611 km NNE of Hopland, California · 18530 days ago · 6 km deep · 35 km away
  28. 1.5Northern California · 18528 days ago · 3 km deep · 9 km away
  29. 2.420 km WSW of Stonyford, California · 18524 days ago · 6 km deep · 54 km away
  30. 1.66 km W of Cobb, California · 18524 days ago · 3 km deep · 1 km away
  31. 1.64 km WSW of Cobb, California · 18524 days ago · 1 km deep · 4 km away
  32. 1.67 km W of Cobb, California · 18523 days ago · 3 km deep · 0 km away
  33. 1.56 km W of Cobb, California · 18523 days ago · 0 km deep · 1 km away
  34. 2.36 km E of Willits, California · 18522 days ago · 2 km deep · 77 km away
  35. 1.76 km W of Cobb, California · 18521 days ago · 3 km deep · 1 km away
  36. 2.18 km WSW of Cobb, California · 18518 days ago · 3 km deep · 2 km away
  37. 2.27 km W of Cobb, California · 18518 days ago · 3 km deep · 1 km away
  38. 1.64 km WSW of Cobb, California · 18515 days ago · 1 km deep · 4 km away
  39. 1.63 km SE of Clear Lake Riviera, California · 18514 days ago · 0 km deep · 16 km away
  40. 1.91 km WNW of Lakeport, California · 18513 days ago · 19 km deep · 28 km away
  41. 1.98 km WSW of Cobb, California · 18513 days ago · 3 km deep · 2 km away
  42. 2.08 km WSW of Cobb, California · 18513 days ago · 4 km deep · 2 km away
  43. 3.46 km W of North Lakeport, California · 18510 days ago · 6 km deep · 34 km away
  44. 3.36 km WSW of Cobb, California · 18510 days ago · -1 km deep · 1 km away
  45. 2.010 km W of Cobb, California · 18508 days ago · 1 km deep · 4 km away
  46. 1.78 km WSW of Cobb, California · 18508 days ago · 4 km deep · 2 km away
  47. 1.87 km WSW of Cobb, California · 18508 days ago · 1 km deep · 2 km away
  48. 1.77 km WSW of Cobb, California · 18507 days ago · 1 km deep · 2 km away
  49. 1.814 km NE of Nice, California · 18506 days ago · 7 km deep · 45 km away
  50. 2.517 km ENE of Potter Valley, California · 18506 days ago · -1 km deep · 62 km away
  51. 3.022 km ENE of Potter Valley, California · 18505 days ago · 11 km deep · 64 km away
  52. 2.54 km WSW of Cobb, California · 18502 days ago · 4 km deep · 3 km away
  53. 2.17 km WSW of Cobb, California · 18501 days ago · 0 km deep · 1 km away

Before

  1. 1.61 km NE of Clear Lake Riviera, California · 18560 days ago · 1 km deep · 19 km away
  2. 1.76 km W of Cobb, California · 18561 days ago · 0 km deep · 1 km away
  3. 2.23 km NNW of Larkfield-Wikiup, California · 18562 days ago · 5 km deep · 31 km away
  4. 1.73 km ESE of Cloverdale, California · 18562 days ago · 3 km deep · 15 km away
  5. 1.911 km NE of Angwin, California · 18565 days ago · 11 km deep · 43 km away
  6. 1.94 km W of Cobb, California · 18565 days ago · 4 km deep · 3 km away
  7. 2.58 km ENE of Willits, California · 18567 days ago · -1 km deep · 80 km away
  8. 3.14 km ENE of Willits, California · 18567 days ago · 10 km deep · 80 km away
  9. 2.47 km NE of Sonoma, California · 18569 days ago · 11 km deep · 63 km away
  10. 1.76 km W of Cobb, California · 18570 days ago · 4 km deep · 1 km away
  11. 1.55 km SE of Clear Lake Riviera, California · 18570 days ago · 2 km deep · 16 km away
  12. 1.86 km W of Cobb, California · 18571 days ago · 3 km deep · 1 km away
  13. 2.28 km WSW of Cobb, California · 18572 days ago · -1 km deep · 2 km away
  14. 1.89 km NW of Cobb, California · 18574 days ago · 2 km deep · 7 km away
  15. 2.719 km SW of Stonyford, California · 18574 days ago · 10 km deep · 50 km away
  16. 1.66 km WSW of Cobb, California · 18577 days ago · 1 km deep · 1 km away
  17. 1.84 km WSW of Cobb, California · 18580 days ago · 3 km deep · 3 km away
  18. 1.56 km WSW of Cobb, California · 18581 days ago · 1 km deep · 1 km away
  19. 1.86 km W of Cobb, California · 18581 days ago · 1 km deep · 0 km away
  20. 1.96 km WSW of Cobb, California · 18581 days ago · 1 km deep · 1 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1027754. Read Tue, Sep 22, 2026, 4:54 PM UTC.