California earthquakes

M1.8 earthquake 5 km WSW of Cobb, California

A magnitude 1.8 earthquake struck 5 km WSW of Cobb, California on Thu, Apr 19, 1984, 11:48 AM PST (19:48 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.2 7 km W 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
1984-04-19 19:48:54 UTC
Depth
0.1 km (0.1 mi), shallow
Epicenter
38.796° N, 122.781° 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
±0.14
Depth from
From location
Station coverage gap
58°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 172 in the 60 days after this one and 0 in the 30 days before it.

After

  1. 1.55 km SW of Cobb, California · 15486 days ago · 1 km deep · 1 km away
  2. 1.86 km W of Cobb, California · 15486 days ago · 0 km deep · 3 km away
  3. 1.6near the coast of Northern California · 15485 days ago · 4 km deep · 45 km away
  4. 3.27 km W of Cobb, California · 15485 days ago · 4 km deep · 3 km away
  5. 1.77 km W of Cobb, California · 15485 days ago · 4 km deep · 3 km away
  6. 2.17 km W of Cobb, California · 15485 days ago · 4 km deep · 3 km away
  7. 2.117 km NNE of Nice, California · 15485 days ago · 8 km deep · 52 km away
  8. 2.57 km W of Cobb, California · 15485 days ago · 3 km deep · 4 km away
  9. 1.63 km NE of Talmage, California · 15484 days ago · 7 km deep · 50 km away
  10. 1.86 km W of Cobb, California · 15484 days ago · 1 km deep · 3 km away
  11. 1.69 km SW of Lakeport, California · 15483 days ago · 0 km deep · 27 km away
  12. 1.86 km WSW of Cobb, California · 15483 days ago · 1 km deep · 2 km away
  13. 1.71 km ESE of Talmage, California · 15482 days ago · 8 km deep · 49 km away
  14. 1.76 km ESE of Lucerne, California · 15482 days ago · 3 km deep · 32 km away
  15. 1.86 km WSW of Cobb, California · 15482 days ago · 3 km deep · 1 km away
  16. 1.87 km W of Cobb, California · 15482 days ago · 3 km deep · 4 km away
  17. 1.66 km W of Cobb, California · 15482 days ago · 3 km deep · 4 km away
  18. 1.66 km W of Potter Valley, California · 15482 days ago · 11 km deep · 69 km away
  19. 1.77 km W of Cobb, California · 15482 days ago · 3 km deep · 3 km away
  20. 2.213 km N of Brooktrails, California · 15481 days ago · 7 km deep · 99 km away
  21. 1.67 km WSW of Cobb, California · 15481 days ago · 3 km deep · 2 km away
  22. 1.68 km WSW of Cobb, California · 15480 days ago · 3 km deep · 3 km away
  23. 1.68 km WSW of Cobb, California · 15479 days ago · 4 km deep · 3 km away
  24. 2.87 km W of Cobb, California · 15479 days ago · 3 km deep · 4 km away
  25. 1.52 km E of Calpella, California · 15479 days ago · 4 km deep · 60 km away
  26. 2.16 km W of Cobb, California · 15479 days ago · 3 km deep · 4 km away
  27. 1.56 km W of Potter Valley, California · 15478 days ago · 8 km deep · 69 km away
  28. 2.47 km WSW of Cobb, California · 15478 days ago · 0 km deep · 3 km away
  29. 2.75 km WSW of Vacaville, California · 15478 days ago · 32 km deep · 82 km away
  30. 2.17 km W of Cobb, California · 15478 days ago · 2 km deep · 3 km away
  31. 1.67 km W of Cobb, California · 15478 days ago · 1 km deep · 3 km away
  32. 2.25 km SW of Cobb, California · 15477 days ago · 0 km deep · 2 km away
  33. 1.60 km NE of Larkfield-Wikiup, California · 15477 days ago · 3 km deep · 31 km away
  34. 1.77 km W of Cobb, California · 15476 days ago · 4 km deep · 3 km away
  35. 1.76 km SW of Cobb, California · 15476 days ago · 0 km deep · 1 km away
  36. 1.87 km W of Cobb, California · 15476 days ago · 3 km deep · 3 km away
  37. 1.56 km W of Cobb, California · 15475 days ago · 2 km deep · 4 km away
  38. 1.59 km W of Cobb, California · 15475 days ago · 2 km deep · 5 km away
  39. 1.88 km SE of Willits, California · 15475 days ago · 4 km deep · 76 km away
  40. 1.77 km WSW of Cobb, California · 15474 days ago · 3 km deep · 3 km away
  41. 2.25 km ESE of Manchester, California · 15473 days ago · 0 km deep · 76 km away
  42. 1.86 km W of Cobb, California · 15472 days ago · 3 km deep · 3 km away
  43. 1.73 km N of Clearlake, California · 15472 days ago · 0 km deep · 25 km away
  44. 1.620 km NNE of Upper Lake, California · 15472 days ago · 6 km deep · 61 km away
  45. 1.66 km WSW of Cobb, California · 15471 days ago · 3 km deep · 2 km away
  46. 1.75 km WSW of Rutherford, California · 15470 days ago · 0 km deep · 47 km away
  47. 1.77 km WSW of Cobb, California · 15470 days ago · 3 km deep · 2 km away
  48. 1.816 km ENE of Potter Valley, California · 15470 days ago · 6 km deep · 68 km away
  49. 2.34 km SW of Cobb, California · 15469 days ago · 0 km deep · 3 km away
  50. 1.67 km W of Cobb, California · 15469 days ago · 3 km deep · 3 km away
  51. 1.96 km W of Cobb, California · 15469 days ago · 2 km deep · 3 km away
  52. 1.66 km W of Cobb, California · 15469 days ago · 3 km deep · 3 km away
  53. 1.67 km WSW of Cobb, California · 15468 days ago · 2 km deep · 3 km away
  54. 1.96 km W of Cobb, California · 15468 days ago · 3 km deep · 3 km away
  55. 2.37 km WSW of Cobb, California · 15468 days ago · 0 km deep · 2 km away
  56. 1.93 km SE of Calpella, California · 15468 days ago · 5 km deep · 58 km away
  57. 1.67 km E of Hidden Valley Lake, California · 15467 days ago · 7 km deep · 27 km away
  58. 1.77 km WSW of Cobb, California · 15467 days ago · 0 km deep · 2 km away
  59. 1.8Northern California · 15467 days ago · 4 km deep · 22 km away
  60. 3.05 km SW of Cobb, California · 15467 days ago · 0 km deep · 2 km away

The first 60 of 172.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc15911. Read Tue, Sep 22, 2026, 8:54 PM UTC.