California earthquakes

M1.6 earthquake 4 km W of Cobb, California

A magnitude 1.6 earthquake struck 4 km W of Cobb, California on Mon, Mar 12, 1990, 7:21 AM PST (15:21 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M3.7 5 km WNW 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
1.6 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-03-12 15:21:20 UTC
Depth
1.9 km (1.2 mi), shallow
Epicenter
38.820° N, 122.777° 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, 0.5 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
146°
Stations used
10

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 110 in the 30 days before it.

After

  1. 1.95 km ENE of Rohnert Park, California · 13355 days ago · 7 km deep · 52 km away
  2. 1.627 km NE of Potter Valley, California · 13355 days ago · 10 km deep · 76 km away
  3. 2.0Northern California · 13355 days ago · 1 km deep · 2 km away
  4. 1.61 km NNW of Calpella, California · 13353 days ago · 7 km deep · 60 km away
  5. 1.84 km W of Cobb, California · 13353 days ago · 0 km deep · 0 km away
  6. 1.66 km W of Cobb, California · 13352 days ago · 0 km deep · 1 km away
  7. 3.75 km WNW of Cobb, California · 13352 days ago · 1 km deep · 2 km away
  8. 1.65 km WNW of Cobb, California · 13352 days ago · -1 km deep · 2 km away
  9. 1.97 km WNW of Cobb, California · 13352 days ago · -1 km deep · 3 km away
  10. 1.66 km WNW of Cobb, California · 13352 days ago · 0 km deep · 3 km away
  11. 1.99 km W of Cobb, California · 13352 days ago · 1 km deep · 5 km away
  12. 2.221 km NE of Potter Valley, California · 13352 days ago · 8 km deep · 71 km away
  13. 2.85 km WSW of Cobb, California · 13352 days ago · 4 km deep · 3 km away
  14. 1.58 km WSW of Arbuckle, California · 13351 days ago · 4 km deep · 58 km away
  15. 1.85 km SW of Cobb, California · 13351 days ago · 0 km deep · 4 km away
  16. 1.59 km W of Cobb, California · 13351 days ago · 0 km deep · 4 km away
  17. 2.319 km SW of Williams, California · 13351 days ago · 13 km deep · 47 km away
  18. 1.87 km W of Cobb, California · 13351 days ago · 1 km deep · 3 km away
  19. 1.89 km W of Cobb, California · 13351 days ago · 0 km deep · 5 km away
  20. 1.61 km S of Clearlake, California · 13350 days ago · 5 km deep · 19 km away
  21. 1.67 km W of Cobb, California · 13350 days ago · 4 km deep · 2 km away
  22. 1.98 km ESE of Hidden Valley Lake, California · 13350 days ago · 7 km deep · 27 km away
  23. 1.616 km ENE of Potter Valley, California · 13350 days ago · 0 km deep · 62 km away
  24. 1.97 km W of Cobb, California · 13349 days ago · 3 km deep · 3 km away
  25. 1.87 km W of Cobb, California · 13349 days ago · 3 km deep · 3 km away
  26. 2.27 km WSW of Cobb, California · 13349 days ago · 1 km deep · 3 km away
  27. 2.87 km WSW of Cobb, California · 13349 days ago · 1 km deep · 3 km away
  28. 2.17 km WSW of Cobb, California · 13349 days ago · 1 km deep · 3 km away
  29. 1.57 km WSW of Cobb, California · 13348 days ago · 1 km deep · 3 km away
  30. 1.77 km SSW of Willits, California · 13348 days ago · 2 km deep · 78 km away
  31. 2.85 km WSW of Cobb, California · 13348 days ago · 1 km deep · 2 km away
  32. 1.56 km W of Cobb, California · 13347 days ago · 1 km deep · 2 km away
  33. 1.73 km S of Cobb, California · 13347 days ago · 2 km deep · 6 km away
  34. 2.47 km WSW of Cobb, California · 13346 days ago · 4 km deep · 3 km away
  35. 2.07 km WSW of Cobb, California · 13346 days ago · 0 km deep · 3 km away
  36. 1.59 km SW of Napa, California · 13346 days ago · 9 km deep · 75 km away
  37. 1.75 km SW of Cobb, California · 13345 days ago · 2 km deep · 3 km away
  38. 1.65 km N of Windsor, California · 13345 days ago · -1 km deep · 25 km away
  39. 1.76 km SW of Cobb, California · 13345 days ago · 0 km deep · 4 km away
  40. 1.58 km ENE of Healdsburg, California · 13344 days ago · 6 km deep · 20 km away
  41. 2.27 km W of Cobb, California · 13344 days ago · 1 km deep · 3 km away
  42. 1.93 km WSW of Forestville, California · 13344 days ago · 0 km deep · 41 km away
  43. 2.717 km NE of Nice, California · 13343 days ago · 10 km deep · 47 km away
  44. 2.117 km NE of Nice, California · 13343 days ago · 9 km deep · 47 km away
  45. 1.614 km E of Angwin, California · 13343 days ago · -1 km deep · 51 km away
  46. 3.27 km WSW of Cobb, California · 13343 days ago · 0 km deep · 3 km away
  47. 1.56 km E of Calpella, California · 13342 days ago · 2 km deep · 55 km away
  48. 1.65 km SW of Cobb, California · 13341 days ago · 2 km deep · 4 km away
  49. 2.08 km WNW of Cobb, California · 13341 days ago · 0 km deep · 4 km away
  50. 2.25 km SW of Cobb, California · 13341 days ago · 2 km deep · 3 km away
  51. 1.57 km WSW of Cobb, California · 13340 days ago · 3 km deep · 3 km away
  52. 1.85 km W of Cobb, California · 13340 days ago · 1 km deep · 2 km away
  53. 2.55 km WSW of Cobb, California · 13340 days ago · 0 km deep · 2 km away
  54. 2.018 km ENE of Sea Ranch, California · 13339 days ago · 4 km deep · 43 km away
  55. 1.69 km NNE of Nice, California · 13339 days ago · 9 km deep · 43 km away
  56. 3.06 km W of Cobb, California · 13339 days ago · 2 km deep · 2 km away
  57. 2.0Northern California · 13339 days ago · 3 km deep · 2 km away
  58. 1.619 km ENE of Potter Valley, California · 13338 days ago · 5 km deep · 62 km away
  59. 2.06 km W of Cobb, California · 13338 days ago · 4 km deep · 2 km away
  60. 1.77 km W of Cobb, California · 13338 days ago · 4 km deep · 3 km away

The first 60 of 172.

Before

  1. 1.65 km WNW of Cobb, California · 13355 days ago · 0 km deep · 2 km away
  2. 2.64 km W of Cobb, California · 13355 days ago · 1 km deep · 0 km away
  3. 2.26 km WSW of Cobb, California · 13355 days ago · 0 km deep · 2 km away
  4. 2.56 km WSW of Cobb, California · 13355 days ago · 0 km deep · 2 km away
  5. 1.7Northern California · 13355 days ago · 3 km deep · 4 km away
  6. 1.65 km W of Cobb, California · 13356 days ago · 0 km deep · 1 km away
  7. 2.78 km W of Cobb, California · 13356 days ago · 0 km deep · 4 km away
  8. 1.69 km W of Cobb, California · 13357 days ago · 1 km deep · 5 km away
  9. 1.75 km SW of Cobb, California · 13357 days ago · 2 km deep · 3 km away
  10. 1.87 km W of Cobb, California · 13357 days ago · 1 km deep · 3 km away
  11. 1.65 km WSW of Glen Ellen, California · 13357 days ago · 8 km deep · 56 km away
  12. 2.89 km W of Cobb, California · 13357 days ago · 0 km deep · 5 km away
  13. 2.05 km W of Cobb, California · 13358 days ago · 0 km deep · 1 km away
  14. 1.68 km W of Cobb, California · 13358 days ago · 1 km deep · 4 km away
  15. 1.91 km N of Calpella, California · 13358 days ago · 7 km deep · 60 km away
  16. 1.522 km NNE of Upper Lake, California · 13359 days ago · 7 km deep · 60 km away
  17. 1.60 km SSE of Calpella, California · 13360 days ago · 4 km deep · 59 km away
  18. 1.66 km W of Cobb, California · 13360 days ago · 0 km deep · 2 km away
  19. 1.85 km SW of Eldridge, California · 13360 days ago · 3 km deep · 59 km away
  20. 1.73 km SW of Cobb, California · 13360 days ago · 1 km deep · 4 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1173913. Read Sun, Oct 4, 2026, 7:58 PM UTC.