California earthquakes

M2.1 earthquake 8 km WSW of Cobb, California

A magnitude 2.1 earthquake struck 8 km WSW of Cobb, California on Sat, Sep 22, 1984, 11:56 AM PDT (18:56 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M4.3 11 km ENE of Clearlake, 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
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1984-09-22 18:56:42 UTC
Depth
0.8 km (0.5 mi), shallow
Epicenter
38.804° N, 122.821° 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
±0.13
Depth from
From location
Station coverage gap
74°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 164 in the 60 days after this one and 92 in the 30 days before it.

After

  1. 1.77 km WSW of Cobb, California · 15350 days ago · 0 km deep · 1 km away
  2. 2.24 km S of Cobb, California · 15350 days ago · 2 km deep · 9 km away
  3. 2.319 km SW of Elk Creek, California · 15350 days ago · -1 km deep · 77 km away
  4. 1.821 km ENE of Potter Valley, California · 15350 days ago · 12 km deep · 68 km away
  5. 1.54 km S of Cobb, California · 15350 days ago · 2 km deep · 9 km away
  6. 1.64 km S of Cobb, California · 15349 days ago · 1 km deep · 9 km away
  7. 1.58 km W of Cobb, California · 15349 days ago · 1 km deep · 1 km away
  8. 1.83 km SSW of Cobb, California · 15349 days ago · 1 km deep · 7 km away
  9. 1.74 km S of Cobb, California · 15349 days ago · 1 km deep · 9 km away
  10. 4.311 km ENE of Clearlake, California · 15349 days ago · 4 km deep · 35 km away
  11. 1.73 km SW of Cobb, California · 15347 days ago · 1 km deep · 6 km away
  12. 1.72 km NNE of Napa, California · 15346 days ago · 1 km deep · 72 km away
  13. 2.45 km WSW of Glen Ellen, California · 15346 days ago · 5 km deep · 55 km away
  14. 1.95 km WSW of Glen Ellen, California · 15346 days ago · 3 km deep · 55 km away
  15. 2.47 km E of Cloverdale, California · 15345 days ago · 3 km deep · 9 km away
  16. 1.713 km ESE of Hidden Valley Lake, California · 15345 days ago · 0 km deep · 35 km away
  17. 2.012 km ESE of Hidden Valley Lake, California · 15345 days ago · 12 km deep · 35 km away
  18. 1.811 km ESE of Hidden Valley Lake, California · 15345 days ago · 4 km deep · 34 km away
  19. 1.67 km E of Hidden Valley Lake, California · 15345 days ago · 6 km deep · 30 km away
  20. 1.67 km ESE of Hidden Valley Lake, California · 15345 days ago · 5 km deep · 29 km away
  21. 2.25 km ESE of Comptche, California · 15345 days ago · 0 km deep · 79 km away
  22. 1.711 km ESE of Hidden Valley Lake, California · 15345 days ago · 0 km deep · 33 km away
  23. 1.87 km ESE of Hidden Valley Lake, California · 15345 days ago · 5 km deep · 30 km away
  24. 1.815 km ESE of Hidden Valley Lake, California · 15345 days ago · 5 km deep · 37 km away
  25. 2.17 km WSW of Cobb, California · 15344 days ago · 3 km deep · 2 km away
  26. 2.04 km N of Clearlake, California · 15344 days ago · -1 km deep · 27 km away
  27. 2.07 km W of Cobb, California · 15344 days ago · 3 km deep · 2 km away
  28. 1.96 km W of Cobb, California · 15344 days ago · 3 km deep · 3 km away
  29. 2.07 km ESE of Hidden Valley Lake, California · 15344 days ago · 4 km deep · 30 km away
  30. 1.57 km SW of Calistoga, California · 15343 days ago · 5 km deep · 34 km away
  31. 1.96 km WSW of Cobb, California · 15342 days ago · 3 km deep · 2 km away
  32. 2.47 km W of Cobb, California · 15342 days ago · -1 km deep · 2 km away
  33. 1.54 km W of Cobb, California · 15342 days ago · 0 km deep · 4 km away
  34. 2.86 km W of Cobb, California · 15342 days ago · 3 km deep · 3 km away
  35. 2.45 km NW of Montalvin, California · 15340 days ago · 6 km deep · 95 km away
  36. 1.88 km NE of Hopland, California · 15339 days ago · 2 km deep · 33 km away
  37. 1.97 km W of Cobb, California · 15339 days ago · -1 km deep · 4 km away
  38. 2.94 km W of Cobb, California · 15339 days ago · 2 km deep · 5 km away
  39. 1.717 km NE of Upper Lake, California · 15338 days ago · 10 km deep · 53 km away
  40. 1.85 km SW of Cobb, California · 15338 days ago · -1 km deep · 4 km away
  41. 2.25 km SW of Cobb, California · 15337 days ago · -1 km deep · 4 km away
  42. 1.74 km WSW of Cobb, California · 15337 days ago · 1 km deep · 4 km away
  43. 2.220 km NNE of Potter Valley, California · 15337 days ago · 6 km deep · 77 km away
  44. 1.84 km S of Cobb, California · 15336 days ago · 1 km deep · 9 km away
  45. 2.32 km NE of Clear Lake Riviera, California · 15336 days ago · 0 km deep · 21 km away
  46. 1.93 km NE of Clear Lake Riviera, California · 15336 days ago · 1 km deep · 22 km away
  47. 1.82 km ENE of Clear Lake Riviera, California · 15336 days ago · 1 km deep · 21 km away
  48. 1.83 km NE of Clear Lake Riviera, California · 15336 days ago · 1 km deep · 22 km away
  49. 1.96 km W of Cobb, California · 15336 days ago · 3 km deep · 3 km away
  50. 1.97 km WSW of Cobb, California · 15336 days ago · 2 km deep · 2 km away
  51. 2.018 km ENE of Sea Ranch, California · 15335 days ago · 5 km deep · 38 km away
  52. 2.13 km NNW of Moskowite Corner, California · 15334 days ago · 0 km deep · 64 km away
  53. 1.85 km WSW of Cobb, California · 15334 days ago · 1 km deep · 4 km away
  54. 1.717 km ENE of Potter Valley, California · 15334 days ago · 8 km deep · 67 km away
  55. 1.66 km W of Cobb, California · 15333 days ago · 3 km deep · 3 km away
  56. 2.86 km WSW of Cobb, California · 15332 days ago · 1 km deep · 2 km away
  57. 1.58 km SE of Boonville, California · 15332 days ago · 4 km deep · 45 km away
  58. 2.12 km NNW of Hopland, California · 15332 days ago · 3 km deep · 34 km away
  59. 1.63 km ENE of Hidden Valley Lake, California · 15332 days ago · 9 km deep · 26 km away
  60. 1.87 km W of Cobb, California · 15332 days ago · 4 km deep · 2 km away

The first 60 of 164.

Before

  1. 1.88 km W of Cobb, California · 15350 days ago · -1 km deep · 2 km away
  2. 2.07 km W of Cobb, California · 15350 days ago · -1 km deep · 2 km away
  3. 4.09 km WSW of Cobb, California · 15350 days ago · 2 km deep · 1 km away
  4. 2.64 km NNE of Geyserville, California · 15351 days ago · 4 km deep · 9 km away
  5. 1.64 km SW of Cobb, California · 15351 days ago · 1 km deep · 6 km away
  6. 1.711 km SW of Hopland, California · 15352 days ago · 4 km deep · 36 km away
  7. 1.99 km W of Cobb, California · 15352 days ago · 1 km deep · 2 km away
  8. 1.68 km WSW of Cobb, California · 15352 days ago · 4 km deep · 2 km away
  9. 1.77 km SW of Calistoga, California · 15353 days ago · 5 km deep · 35 km away
  10. 1.96 km WSW of Cobb, California · 15353 days ago · 0 km deep · 3 km away
  11. 1.58 km W of Cobb, California · 15354 days ago · 0 km deep · 1 km away
  12. 1.825 km SE of Covelo, California · 15354 days ago · 5 km deep · 92 km away
  13. 1.64 km SSE of Clear Lake Riviera, California · 15354 days ago · -1 km deep · 17 km away
  14. 1.70 km WNW of Kelseyville, California · 15354 days ago · -1 km deep · 20 km away
  15. 1.724 km NNE of Potter Valley, California · 15355 days ago · 3 km deep · 81 km away
  16. 2.24 km SE of Clearlake Oaks, California · 15355 days ago · -1 km deep · 26 km away
  17. 1.55 km W of Cobb, California · 15356 days ago · 1 km deep · 4 km away
  18. 1.912 km W of Cobb, California · 15356 days ago · -1 km deep · 5 km away
  19. 2.16 km ENE of Rohnert Park, California · 15356 days ago · 4 km deep · 53 km away
  20. 1.66 km SW of Eldridge, California · 15356 days ago · 5 km deep · 59 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc28458. Read Sat, Oct 3, 2026, 3:13 AM UTC.