California earthquakes

M2.3 earthquake 9 km WSW of Cobb, California

A magnitude 2.3 earthquake struck 9 km WSW of Cobb, California on Fri, Mar 30, 1984, 12:17 PM PST (20:17 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M2.4 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.

Open the live map with earthquakes

The earthquake

Magnitude
2.3 (md), micro
Local time
UTC
1984-03-30 20:17:58 UTC
Depth
1.1 km (0.7 mi), shallow
Epicenter
38.796° N, 122.823° 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, 0.5 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
51°
Stations used
18

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 0 in the 30 days before it.

After

  1. 1.98 km SE of Willits, California · 15506 days ago · 4 km deep · 74 km away
  2. 2.09 km WSW of Cobb, California · 15505 days ago · 2 km deep · 1 km away
  3. 1.75 km W of Cobb, California · 15505 days ago · 3 km deep · 4 km away
  4. 1.58 km SE of Willits, California · 15505 days ago · 6 km deep · 74 km away
  5. 1.5Northern California · 15505 days ago · 6 km deep · 28 km away
  6. 1.65 km WSW of Cobb, California · 15505 days ago · 0 km deep · 4 km away
  7. 1.85 km WSW of Cobb, California · 15505 days ago · 0 km deep · 4 km away
  8. 1.68 km WSW of Cobb, California · 15504 days ago · 0 km deep · 1 km away
  9. 2.48 km WSW of Cobb, California · 15504 days ago · -1 km deep · 1 km away
  10. 1.85 km W of Cobb, California · 15504 days ago · 0 km deep · 5 km away
  11. 2.67 km NW of Cobb, California · 15504 days ago · 3 km deep · 9 km away
  12. 2.28 km WSW of Cobb, California · 15504 days ago · 3 km deep · 1 km away
  13. 1.78 km WSW of Cobb, California · 15504 days ago · 3 km deep · 1 km away
  14. 1.66 km W of Cobb, California · 15504 days ago · 1 km deep · 4 km away
  15. 2.56 km W of Cobb, California · 15503 days ago · 1 km deep · 4 km away
  16. 2.16 km W of Cobb, California · 15503 days ago · -1 km deep · 4 km away
  17. 1.9Northern California · 15503 days ago · 0 km deep · 5 km away
  18. 1.68 km NE of Brooktrails, California · 15503 days ago · 10 km deep · 89 km away
  19. 2.86 km W of Cobb, California · 15503 days ago · 3 km deep · 3 km away
  20. 1.5Northern California · 15503 days ago · 3 km deep · 3 km away
  21. 2.15 km W of Cobb, California · 15501 days ago · 0 km deep · 5 km away
  22. 1.67 km W of Cobb, California · 15501 days ago · 3 km deep · 3 km away
  23. 1.59 km WSW of Cobb, California · 15501 days ago · 1 km deep · 0 km away
  24. 1.95 km WSW of Cobb, California · 15498 days ago · 0 km deep · 3 km away
  25. 1.77 km W of Cobb, California · 15498 days ago · 3 km deep · 3 km away
  26. 2.69 km WSW of Cobb, California · 15498 days ago · 2 km deep · 1 km away
  27. 1.64 km SSE of Clear Lake Riviera, California · 15498 days ago · 0 km deep · 18 km away
  28. 1.96 km W of Cobb, California · 15498 days ago · 3 km deep · 4 km away
  29. 2.27 km W of Cobb, California · 15498 days ago · 2 km deep · 2 km away
  30. 1.96 km W of Cobb, California · 15498 days ago · 3 km deep · 4 km away
  31. 1.58 km W of Cobb, California · 15497 days ago · 1 km deep · 2 km away
  32. 1.86 km W of Cobb, California · 15497 days ago · 3 km deep · 4 km away
  33. 2.38 km SE of Willits, California · 15497 days ago · 3 km deep · 74 km away
  34. 1.69 km SE of Willits, California · 15497 days ago · 5 km deep · 74 km away
  35. 3.08 km SE of Willits, California · 15497 days ago · 3 km deep · 74 km away
  36. 1.99 km SE of Willits, California · 15497 days ago · 4 km deep · 74 km away
  37. 1.95 km WSW of Cobb, California · 15497 days ago · 1 km deep · 4 km away
  38. 1.65 km WSW of Cobb, California · 15497 days ago · 0 km deep · 4 km away
  39. 1.85 km WSW of Cobb, California · 15496 days ago · -1 km deep · 4 km away
  40. 2.35 km WSW of Cobb, California · 15496 days ago · -1 km deep · 4 km away
  41. 2.55 km WSW of Cobb, California · 15496 days ago · 1 km deep · 4 km away
  42. 1.85 km WSW of Cobb, California · 15496 days ago · 0 km deep · 4 km away
  43. 2.05 km WSW of Cobb, California · 15495 days ago · 0 km deep · 4 km away
  44. 2.08 km NE of Hidden Valley Lake, California · 15495 days ago · -1 km deep · 29 km away
  45. 2.05 km WSW of Cobb, California · 15495 days ago · 0 km deep · 4 km away
  46. 2.15 km WSW of Cobb, California · 15495 days ago · 1 km deep · 4 km away
  47. 1.76 km W of Cobb, California · 15495 days ago · 0 km deep · 4 km away
  48. 2.03 km WNW of Soda Bay, California · 15494 days ago · 4 km deep · 25 km away
  49. 1.95 km W of Cobb, California · 15494 days ago · 0 km deep · 5 km away
  50. 1.98 km W of Cobb, California · 15493 days ago · 0 km deep · 3 km away
  51. 1.69 km WSW of Cobb, California · 15492 days ago · 2 km deep · 1 km away
  52. 1.74 km W of Cobb, California · 15492 days ago · 0 km deep · 5 km away
  53. 2.25 km W of Cobb, California · 15492 days ago · 0 km deep · 4 km away
  54. 1.87 km WSW of Cobb, California · 15491 days ago · 3 km deep · 1 km away
  55. 1.72 km W of Cobb, California · 15491 days ago · -1 km deep · 7 km away
  56. 2.68 km WSW of Cobb, California · 15491 days ago · 1 km deep · 0 km away
  57. 2.216 km ENE of Hidden Valley Lake, California · 15490 days ago · 2 km deep · 39 km away
  58. 1.615 km ENE of Potter Valley, California · 15490 days ago · 4 km deep · 67 km away
  59. 1.76 km ESE of Willits, California · 15489 days ago · -1 km deep · 76 km away
  60. 1.54 km W of Cobb, California · 15489 days ago · 0 km deep · 5 km away

The first 60 of 170.

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc12920. Read Tue, Sep 22, 2026, 8:48 PM UTC.