California earthquakes

M1.8 earthquake 8 km WSW of Cobb, California

A magnitude 1.8 earthquake struck 8 km WSW of Cobb, California on Sat, Jun 16, 1984, 5:44 AM PDT (12:44 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M3.2 7 km SW 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, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1984-06-16 12:44:54 UTC
Depth
3.0 km (1.8 mi), shallow
Epicenter
38.799° N, 122.813° 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 0.3 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.19
Depth from
From location
Station coverage gap
71°
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 108 in the 30 days before it.

After

  1. 1.68 km WSW of Cobb, California · 15449 days ago · 3 km deep · 0 km away
  2. 3.16 km W of Cobb, California · 15449 days ago · 3 km deep · 2 km away
  3. 2.321 km NNE of Potter Valley, California · 15449 days ago · 3 km deep · 78 km away
  4. 2.422 km NNE of Potter Valley, California · 15449 days ago · -1 km deep · 79 km away
  5. 1.87 km WSW of Cobb, California · 15449 days ago · 1 km deep · 1 km away
  6. 1.87 km WSW of Cobb, California · 15448 days ago · 2 km deep · 1 km away
  7. 2.47 km WSW of Cobb, California · 15448 days ago · 2 km deep · 1 km away
  8. 1.95 km SW of Cobb, California · 15448 days ago · 0 km deep · 4 km away
  9. 2.34 km SE of Larkfield-Wikiup, California · 15448 days ago · 3 km deep · 36 km away
  10. 2.48 km WSW of Cobb, California · 15448 days ago · 3 km deep · 0 km away
  11. 1.95 km ESE of Sonoma, California · 15447 days ago · 8 km deep · 68 km away
  12. 2.78 km WSW of Napa, California · 15447 days ago · 5 km deep · 71 km away
  13. 1.55 km WSW of Cobb, California · 15447 days ago · 2 km deep · 3 km away
  14. 2.24 km WSW of Cobb, California · 15446 days ago · 3 km deep · 4 km away
  15. 2.03 km ENE of Williams, California · 15446 days ago · 4 km deep · 73 km away
  16. 2.27 km NW of Guinda, California · 15446 days ago · -1 km deep · 50 km away
  17. 1.57 km W of Cobb, California · 15446 days ago · 3 km deep · 1 km away
  18. 1.74 km WSW of Cobb, California · 15446 days ago · 1 km deep · 4 km away
  19. 1.98 km WSW of Napa, California · 15445 days ago · 7 km deep · 71 km away
  20. 1.77 km W of Cobb, California · 15445 days ago · 1 km deep · 3 km away
  21. 2.58 km WSW of Cobb, California · 15445 days ago · 2 km deep · 1 km away
  22. 1.67 km WSW of Cobb, California · 15444 days ago · 2 km deep · 1 km away
  23. 1.94 km NNW of Clearlake, California · 15444 days ago · -1 km deep · 27 km away
  24. 2.710 km NNE of Hopland, California · 15444 days ago · 4 km deep · 36 km away
  25. 2.15 km SW of Cobb, California · 15442 days ago · 2 km deep · 3 km away
  26. 1.52 km SE of Hopland, California · 15442 days ago · 4 km deep · 30 km away
  27. 2.113 km NNE of Upper Lake, California · 15441 days ago · 4 km deep · 53 km away
  28. 1.67 km W of Cobb, California · 15441 days ago · 3 km deep · 2 km away
  29. 1.78 km WSW of Cobb, California · 15440 days ago · 0 km deep · 0 km away
  30. 2.05 km SW of Cobb, California · 15440 days ago · 1 km deep · 3 km away
  31. 1.86 km WSW of Cobb, California · 15440 days ago · 3 km deep · 2 km away
  32. 1.58 km WSW of Cobb, California · 15440 days ago · 3 km deep · 1 km away
  33. 2.16 km WSW of Cobb, California · 15438 days ago · 0 km deep · 2 km away
  34. 2.017 km NE of Upper Lake, California · 15438 days ago · 6 km deep · 55 km away
  35. 2.47 km ENE of Willits, California · 15437 days ago · 3 km deep · 80 km away
  36. 2.78 km ENE of Willits, California · 15437 days ago · 3 km deep · 80 km away
  37. 1.68 km WSW of Cobb, California · 15436 days ago · 3 km deep · 0 km away
  38. 2.18 km WSW of Cobb, California · 15436 days ago · 3 km deep · 0 km away
  39. 2.0Northern California · 15435 days ago · 0 km deep · 2 km away
  40. 1.717 km NE of Upper Lake, California · 15435 days ago · 4 km deep · 54 km away
  41. 1.97 km NE of Rohnert Park, California · 15435 days ago · 0 km deep · 49 km away
  42. 1.97 km W of Cobb, California · 15435 days ago · 3 km deep · 2 km away
  43. 1.64 km W of Healdsburg, California · 15434 days ago · 3 km deep · 24 km away
  44. 1.58 km NW of Cobb, California · 15434 days ago · 2 km deep · 8 km away
  45. 1.56 km W of Cobb, California · 15434 days ago · 1 km deep · 3 km away
  46. 1.95 km W of Cobb, California · 15433 days ago · 3 km deep · 3 km away
  47. 1.96 km W of Cobb, California · 15433 days ago · 3 km deep · 3 km away
  48. 1.59 km SE of Willits, California · 15433 days ago · 5 km deep · 74 km away
  49. 1.512 km NE of Upper Lake, California · 15433 days ago · 6 km deep · 48 km away
  50. 1.94 km ENE of Lower Lake, California · 15432 days ago · -1 km deep · 26 km away
  51. 2.29 km ENE of Lower Lake, California · 15432 days ago · 1 km deep · 31 km away
  52. 2.05 km E of Lower Lake, California · 15432 days ago · -1 km deep · 26 km away
  53. 1.94 km N of Clearlake, California · 15432 days ago · 18 km deep · 28 km away
  54. 1.67 km E of Lower Lake, California · 15432 days ago · 2 km deep · 28 km away
  55. 1.75 km WSW of Cobb, California · 15432 days ago · -1 km deep · 3 km away
  56. 1.58 km W of Cobb, California · 15432 days ago · 3 km deep · 1 km away
  57. 1.67 km W of Cobb, California · 15432 days ago · 3 km deep · 2 km away
  58. 1.67 km W of Cobb, California · 15432 days ago · 2 km deep · 2 km away
  59. 1.67 km W of Cobb, California · 15432 days ago · 1 km deep · 3 km away
  60. 1.86 km W of Cobb, California · 15431 days ago · 3 km deep · 3 km away

The first 60 of 170.

Before

  1. 2.55 km SW of Cobb, California · 15449 days ago · 0 km deep · 4 km away
  2. 3.06 km W of Cobb, California · 15449 days ago · 3 km deep · 2 km away
  3. 2.55 km WSW of Cobb, California · 15449 days ago · 0 km deep · 3 km away
  4. 2.56 km WSW of Cobb, California · 15450 days ago · -1 km deep · 2 km away
  5. 2.26 km WSW of Cobb, California · 15450 days ago · 3 km deep · 2 km away
  6. 1.86 km WSW of Cobb, California · 15450 days ago · 3 km deep · 2 km away
  7. 1.66 km WSW of Cobb, California · 15451 days ago · 3 km deep · 2 km away
  8. 2.14 km NE of Talmage, California · 15451 days ago · 7 km deep · 49 km away
  9. 2.123 km NNE of Potter Valley, California · 15451 days ago · 10 km deep · 80 km away
  10. 1.65 km NNE of Clearlake, California · 15452 days ago · -1 km deep · 29 km away
  11. 1.93 km N of Larkfield-Wikiup, California · 15452 days ago · 4 km deep · 28 km away
  12. 1.68 km WSW of Cobb, California · 15453 days ago · 3 km deep · 0 km away
  13. 1.74 km SE of Clear Lake Riviera, California · 15454 days ago · 2 km deep · 18 km away
  14. 1.96 km W of Cobb, California · 15454 days ago · 3 km deep · 3 km away
  15. 3.26 km W of Cobb, California · 15454 days ago · 2 km deep · 3 km away
  16. 2.07 km W of Cobb, California · 15454 days ago · 3 km deep · 2 km away
  17. 1.8Northern California · 15455 days ago · -1 km deep · 30 km away
  18. 2.2Northern California · 15455 days ago · 1 km deep · 1 km away
  19. 1.723 km NNE of Potter Valley, California · 15455 days ago · 9 km deep · 81 km away
  20. 1.77 km W of Cobb, California · 15455 days ago · 3 km deep · 1 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc20993. Read Sat, Oct 3, 2026, 2:52 PM UTC.