California earthquakes

M1.9 earthquake 9 km WNW of Cobb, California

A magnitude 1.9 earthquake struck 9 km WNW of Cobb, California on Tue, Feb 27, 1990, 7:20 AM PST (15:20 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
1.9 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-02-27 15:20:27 UTC
Depth
2.0 km (1.2 mi), shallow
Epicenter
38.840° N, 122.824° 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, 0.7 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
49°
Stations used
19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 176 in the 60 days after this one and 100 in the 30 days before it.

After

  1. 1.66 km WSW of Cobb, California · 13368 days ago · 2 km deep · 5 km away
  2. 1.624 km NE of Potter Valley, California · 13367 days ago · 10 km deep · 74 km away
  3. 1.54 km W of Cobb, California · 13366 days ago · 1 km deep · 4 km away
  4. 1.87 km WSW of Cobb, California · 13366 days ago · 1 km deep · 5 km away
  5. 1.84 km W of Cobb, California · 13366 days ago · 0 km deep · 5 km away
  6. 1.94 km W of Cobb, California · 13366 days ago · 1 km deep · 4 km away
  7. 2.04 km SE of Larkfield-Wikiup, California · 13366 days ago · 6 km deep · 41 km away
  8. 1.67 km S of Cobb, California · 13365 days ago · -1 km deep · 12 km away
  9. 2.27 km WSW of Cobb, California · 13365 days ago · 1 km deep · 4 km away
  10. 2.03 km SSW of Cobb, California · 13365 days ago · 2 km deep · 8 km away
  11. 1.73 km SSW of Cobb, California · 13365 days ago · 1 km deep · 9 km away
  12. 1.75 km W of Cobb, California · 13364 days ago · 1 km deep · 4 km away
  13. 1.55 km WSW of Cobb, California · 13364 days ago · 1 km deep · 6 km away
  14. 2.17 km WSW of Cobb, California · 13364 days ago · 1 km deep · 5 km away
  15. 2.214 km SE of Hidden Valley Lake, California · 13363 days ago · 9 km deep · 37 km away
  16. 1.614 km SE of Hidden Valley Lake, California · 13363 days ago · 9 km deep · 37 km away
  17. 1.78 km W of Cobb, California · 13363 days ago · 1 km deep · 3 km away
  18. 1.66 km SW of Cobb, California · 13363 days ago · 1 km deep · 7 km away
  19. 1.55 km WSW of Cobb, California · 13362 days ago · 1 km deep · 6 km away
  20. 2.07 km WNW of Cobb, California · 13362 days ago · 0 km deep · 1 km away
  21. 2.14 km WSW of Cobb, California · 13361 days ago · 1 km deep · 6 km away
  22. 1.910 km SE of Laytonville, California · 13361 days ago · 8 km deep · 99 km away
  23. 1.84 km WSW of Moskowite Corner, California · 13361 days ago · 3 km deep · 69 km away
  24. 1.84 km W of Cobb, California · 13361 days ago · 1 km deep · 4 km away
  25. 1.510 km ESE of Hidden Valley Lake, California · 13361 days ago · 7 km deep · 33 km away
  26. 1.73 km SW of Cobb, California · 13360 days ago · 1 km deep · 8 km away
  27. 1.85 km SW of Eldridge, California · 13360 days ago · 3 km deep · 63 km away
  28. 1.66 km W of Cobb, California · 13360 days ago · 0 km deep · 3 km away
  29. 1.60 km SSE of Calpella, California · 13359 days ago · 4 km deep · 54 km away
  30. 1.522 km NNE of Upper Lake, California · 13358 days ago · 7 km deep · 58 km away
  31. 1.91 km N of Calpella, California · 13358 days ago · 7 km deep · 56 km away
  32. 1.68 km W of Cobb, California · 13358 days ago · 1 km deep · 1 km away
  33. 2.05 km W of Cobb, California · 13357 days ago · 0 km deep · 4 km away
  34. 2.89 km W of Cobb, California · 13357 days ago · 0 km deep · 3 km away
  35. 1.65 km WSW of Glen Ellen, California · 13357 days ago · 8 km deep · 60 km away
  36. 1.87 km W of Cobb, California · 13357 days ago · 1 km deep · 2 km away
  37. 1.75 km SW of Cobb, California · 13357 days ago · 2 km deep · 7 km away
  38. 1.69 km W of Cobb, California · 13356 days ago · 1 km deep · 3 km away
  39. 2.78 km W of Cobb, California · 13356 days ago · 0 km deep · 1 km away
  40. 1.65 km W of Cobb, California · 13356 days ago · 0 km deep · 4 km away
  41. 1.7Northern California · 13355 days ago · 3 km deep · 7 km away
  42. 2.56 km WSW of Cobb, California · 13355 days ago · 0 km deep · 5 km away
  43. 2.26 km WSW of Cobb, California · 13355 days ago · 0 km deep · 5 km away
  44. 2.64 km W of Cobb, California · 13355 days ago · 1 km deep · 4 km away
  45. 1.65 km WNW of Cobb, California · 13355 days ago · 0 km deep · 3 km away
  46. 1.64 km W of Cobb, California · 13355 days ago · 2 km deep · 5 km away
  47. 1.95 km ENE of Rohnert Park, California · 13355 days ago · 7 km deep · 55 km away
  48. 1.627 km NE of Potter Valley, California · 13355 days ago · 10 km deep · 74 km away
  49. 2.0Northern California · 13355 days ago · 1 km deep · 5 km away
  50. 1.61 km NNW of Calpella, California · 13353 days ago · 7 km deep · 56 km away
  51. 1.84 km W of Cobb, California · 13353 days ago · 0 km deep · 5 km away
  52. 1.66 km W of Cobb, California · 13352 days ago · 0 km deep · 3 km away
  53. 3.75 km WNW of Cobb, California · 13352 days ago · 1 km deep · 3 km away
  54. 1.65 km WNW of Cobb, California · 13352 days ago · -1 km deep · 3 km away
  55. 1.97 km WNW of Cobb, California · 13352 days ago · -1 km deep · 2 km away
  56. 1.66 km WNW of Cobb, California · 13352 days ago · 0 km deep · 3 km away
  57. 1.99 km W of Cobb, California · 13352 days ago · 1 km deep · 2 km away
  58. 2.221 km NE of Potter Valley, California · 13352 days ago · 8 km deep · 68 km away
  59. 2.85 km WSW of Cobb, California · 13351 days ago · 4 km deep · 6 km away
  60. 1.58 km WSW of Arbuckle, California · 13351 days ago · 4 km deep · 61 km away

The first 60 of 176.

Before

  1. 1.64 km ENE of Willits, California · 13368 days ago · 6 km deep · 78 km away
  2. 2.26 km ENE of Rohnert Park, California · 13368 days ago · 6 km deep · 56 km away
  3. 2.17 km W of Cobb, California · 13368 days ago · 0 km deep · 1 km away
  4. 1.76 km W of Cobb, California · 13369 days ago · 2 km deep · 2 km away
  5. 2.27 km W of Cobb, California · 13369 days ago · 0 km deep · 2 km away
  6. 1.97 km W of Cobb, California · 13369 days ago · 0 km deep · 3 km away
  7. 2.07 km ENE of Rohnert Park, California · 13369 days ago · 3 km deep · 56 km away
  8. 2.25 km WSW of Cobb, California · 13369 days ago · 0 km deep · 5 km away
  9. 1.811 km WNW of Calistoga, California · 13369 days ago · 45 km deep · 26 km away
  10. 1.86 km SW of Cobb, California · 13369 days ago · 0 km deep · 8 km away
  11. 1.67 km WSW of Cobb, California · 13370 days ago · 1 km deep · 4 km away
  12. 2.36 km SW of Cobb, California · 13370 days ago · 2 km deep · 7 km away
  13. 1.79 km W of Cobb, California · 13370 days ago · 0 km deep · 3 km away
  14. 1.75 km SW of Cobb, California · 13370 days ago · 2 km deep · 7 km away
  15. 1.85 km WSW of Cobb, California · 13370 days ago · 1 km deep · 6 km away
  16. 1.86 km W of Cobb, California · 13371 days ago · 1 km deep · 2 km away
  17. 2.2Northern California · 13371 days ago · -1 km deep · 3 km away
  18. 1.66 km SW of Cobb, California · 13372 days ago · 1 km deep · 8 km away
  19. 1.77 km ESE of Geyserville, California · 13373 days ago · 6 km deep · 17 km away
  20. 1.86 km SW of Cobb, California · 13373 days ago · 0 km deep · 8 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc153303. Read Sun, Oct 4, 2026, 4:47 PM UTC.