California earthquakes

M1.8 earthquake 5 km SW of Cobb, California

A magnitude 1.8 earthquake struck 5 km SW of Cobb, California on Sat, Mar 24, 1984, 7:11 AM PST (15:11 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M2.8 6 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
1.8 (md), micro
Local time
UTC
1984-03-24 15:11:53 UTC
Depth
0.6 km (0.4 mi), shallow
Epicenter
38.784° N, 122.756° 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
±0.20
Depth from
From location
Station coverage gap
53°
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: 167 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 2.86 km WSW of Cobb, California · 15511 days ago · 3 km deep · 4 km away
  2. 2.66 km W of Cobb, California · 15511 days ago · 0 km deep · 5 km away
  3. 2.06 km WSW of Cobb, California · 15511 days ago · 3 km deep · 4 km away
  4. 1.718 km NNE of Upper Lake, California · 15511 days ago · 9 km deep · 61 km away
  5. 1.78 km SE of Willits, California · 15511 days ago · -1 km deep · 78 km away
  6. 1.66 km W of Cobb, California · 15510 days ago · 3 km deep · 6 km away
  7. 1.69 km ESE of Willits, California · 15509 days ago · 6 km deep · 78 km away
  8. 2.18 km SE of Willits, California · 15509 days ago · 2 km deep · 78 km away
  9. 1.69 km WSW of Cobb, California · 15509 days ago · 2 km deep · 6 km away
  10. 1.75 km WSW of Cobb, California · 15508 days ago · 0 km deep · 3 km away
  11. 1.69 km WSW of Cobb, California · 15508 days ago · 7 km deep · 7 km away
  12. 1.87 km WSW of Cobb, California · 15508 days ago · 0 km deep · 4 km away
  13. 1.65 km E of Lakeport, California · 15507 days ago · 5 km deep · 30 km away
  14. 1.55 km SSW of Boonville, California · 15507 days ago · 1 km deep · 59 km away
  15. 1.616 km ENE of Potter Valley, California · 15506 days ago · 8 km deep · 69 km away
  16. 2.99 km SE of Willits, California · 15506 days ago · 4 km deep · 78 km away
  17. 1.63 km ENE of Brooktrails, California · 15506 days ago · 4 km deep · 91 km away
  18. 1.99 km W of Cobb, California · 15506 days ago · -1 km deep · 7 km away
  19. 1.66 km WSW of Cobb, California · 15506 days ago · 0 km deep · 4 km away
  20. 1.66 km WSW of Cobb, California · 15506 days ago · 0 km deep · 4 km away
  21. 3.06 km W of Cobb, California · 15506 days ago · 0 km deep · 5 km away
  22. 2.86 km WSW of Cobb, California · 15506 days ago · 0 km deep · 4 km away
  23. 2.57 km WSW of Cobb, California · 15506 days ago · 0 km deep · 5 km away
  24. 1.66 km S of Hopland, California · 15506 days ago · 4 km deep · 34 km away
  25. 1.77 km WSW of Cobb, California · 15506 days ago · 0 km deep · 5 km away
  26. 1.65 km W of Cobb, California · 15506 days ago · 0 km deep · 5 km away
  27. 1.513 km W of Cazadero, California · 15506 days ago · 4 km deep · 50 km away
  28. 1.98 km SE of Willits, California · 15506 days ago · 4 km deep · 78 km away
  29. 2.09 km WSW of Cobb, California · 15505 days ago · 2 km deep · 7 km away
  30. 1.75 km W of Cobb, California · 15505 days ago · 3 km deep · 5 km away
  31. 1.58 km SE of Willits, California · 15505 days ago · 6 km deep · 78 km away
  32. 1.5Northern California · 15505 days ago · 6 km deep · 26 km away
  33. 1.65 km WSW of Cobb, California · 15505 days ago · 0 km deep · 2 km away
  34. 1.85 km WSW of Cobb, California · 15505 days ago · 0 km deep · 3 km away
  35. 1.68 km WSW of Cobb, California · 15504 days ago · 0 km deep · 6 km away
  36. 2.48 km WSW of Cobb, California · 15504 days ago · -1 km deep · 6 km away
  37. 1.85 km W of Cobb, California · 15504 days ago · 0 km deep · 6 km away
  38. 2.67 km NW of Cobb, California · 15504 days ago · 3 km deep · 10 km away
  39. 2.28 km WSW of Cobb, California · 15504 days ago · 3 km deep · 5 km away
  40. 1.78 km WSW of Cobb, California · 15504 days ago · 3 km deep · 5 km away
  41. 1.66 km W of Cobb, California · 15504 days ago · 1 km deep · 6 km away
  42. 2.56 km W of Cobb, California · 15503 days ago · 1 km deep · 6 km away
  43. 2.16 km W of Cobb, California · 15503 days ago · -1 km deep · 6 km away
  44. 1.9Northern California · 15503 days ago · 0 km deep · 3 km away
  45. 1.68 km NE of Brooktrails, California · 15503 days ago · 10 km deep · 93 km away
  46. 2.86 km W of Cobb, California · 15503 days ago · 3 km deep · 5 km away
  47. 1.5Northern California · 15503 days ago · 3 km deep · 5 km away
  48. 2.15 km W of Cobb, California · 15501 days ago · 0 km deep · 5 km away
  49. 1.67 km W of Cobb, California · 15501 days ago · 3 km deep · 6 km away
  50. 1.59 km WSW of Cobb, California · 15501 days ago · 1 km deep · 6 km away
  51. 1.95 km WSW of Cobb, California · 15498 days ago · 0 km deep · 4 km away
  52. 1.77 km W of Cobb, California · 15498 days ago · 3 km deep · 6 km away
  53. 2.69 km WSW of Cobb, California · 15498 days ago · 2 km deep · 6 km away
  54. 1.64 km SSE of Clear Lake Riviera, California · 15498 days ago · 0 km deep · 16 km away
  55. 1.96 km W of Cobb, California · 15498 days ago · 3 km deep · 6 km away
  56. 2.27 km W of Cobb, California · 15498 days ago · 2 km deep · 6 km away
  57. 1.96 km W of Cobb, California · 15498 days ago · 3 km deep · 5 km away
  58. 1.58 km W of Cobb, California · 15497 days ago · 1 km deep · 7 km away
  59. 1.86 km W of Cobb, California · 15497 days ago · 3 km deep · 5 km away
  60. 2.38 km SE of Willits, California · 15497 days ago · 3 km deep · 78 km away

The first 60 of 167.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc11986. Read Tue, Sep 22, 2026, 9:40 PM UTC.