California earthquakes

M1.9 earthquake 9 km W of Cobb, California

A magnitude 1.9 earthquake struck 9 km W of Cobb, California on Sat, Sep 23, 1989, 3:32 AM PDT (10:32 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M3.6 22 km NE of Potter Valley, 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
1989-09-23 10:32:33 UTC
Depth
0.6 km (0.3 mi), shallow
Epicenter
38.823° N, 122.832° 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, 0.7 km in depth
Magnitude uncertainty
±0.25
Depth from
From location
Station coverage gap
81°
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 147 in the 60 days after this one and 106 in the 30 days before it.

After

  1. 2.25 km N of Geyserville, California · 13525 days ago · 3 km deep · 10 km away
  2. 1.67 km SE of Sea Ranch, California · 13523 days ago · 3 km deep · 52 km away
  3. 1.95 km N of Geyserville, California · 13523 days ago · 5 km deep · 9 km away
  4. 3.35 km N of Geyserville, California · 13523 days ago · 5 km deep · 9 km away
  5. 2.16 km N of Geyserville, California · 13523 days ago · 5 km deep · 9 km away
  6. 2.76 km N of Geyserville, California · 13523 days ago · 2 km deep · 9 km away
  7. 2.05 km N of Geyserville, California · 13523 days ago · 5 km deep · 9 km away
  8. 2.06 km WNW of Cobb, California · 13523 days ago · 1 km deep · 3 km away
  9. 1.96 km N of Geyserville, California · 13523 days ago · 4 km deep · 8 km away
  10. 1.86 km SSE of Albion, California · 13523 days ago · 6 km deep · 87 km away
  11. 2.55 km N of Geyserville, California · 13523 days ago · 4 km deep · 10 km away
  12. 1.613 km NW of Moskowite Corner, California · 13523 days ago · 2 km deep · 57 km away
  13. 2.4Northern California · 13522 days ago · 4 km deep · 10 km away
  14. 2.45 km N of Geyserville, California · 13522 days ago · 4 km deep · 10 km away
  15. 2.44 km N of Geyserville, California · 13522 days ago · 4 km deep · 10 km away
  16. 1.78 km ENE of Clearlake, California · 13522 days ago · 5 km deep · 31 km away
  17. 1.914 km NW of Moskowite Corner, California · 13522 days ago · 2 km deep · 56 km away
  18. 1.81 km NW of Brooktrails, California · 13521 days ago · 3 km deep · 85 km away
  19. 1.93 km W of Cobb, California · 13521 days ago · 0 km deep · 6 km away
  20. 1.814 km E of Angwin, California · 13520 days ago · 1 km deep · 56 km away
  21. 1.65 km W of Cobb, California · 13520 days ago · 2 km deep · 4 km away
  22. 1.57 km W of Cobb, California · 13519 days ago · 0 km deep · 2 km away
  23. 1.74 km W of Cobb, California · 13519 days ago · 2 km deep · 5 km away
  24. 1.711 km W of Cobb, California · 13519 days ago · 3 km deep · 2 km away
  25. 2.56 km W of Cobb, California · 13519 days ago · 3 km deep · 3 km away
  26. 1.910 km WSW of Cobb, California · 13519 days ago · 2 km deep · 3 km away
  27. 1.69 km WNW of Cobb, California · 13518 days ago · 1 km deep · 3 km away
  28. 1.84 km WNW of Cobb, California · 13518 days ago · 2 km deep · 5 km away
  29. 2.12 km ESE of Potter Valley, California · 13518 days ago · 4 km deep · 59 km away
  30. 1.62 km SW of Cottonwood, California · 13518 days ago · 9 km deep · 75 km away
  31. 2.45 km WNW of Cobb, California · 13518 days ago · 0 km deep · 4 km away
  32. 1.95 km W of Cobb, California · 13518 days ago · 1 km deep · 4 km away
  33. 1.88 km W of Cobb, California · 13517 days ago · 1 km deep · 1 km away
  34. 2.58 km W of Cobb, California · 13517 days ago · 0 km deep · 1 km away
  35. 1.57 km WSW of Cobb, California · 13516 days ago · 4 km deep · 4 km away
  36. 1.913 km E of Clearlake, California · 13516 days ago · 1 km deep · 36 km away
  37. 1.57 km W of Cobb, California · 13516 days ago · 0 km deep · 3 km away
  38. 1.87 km WNW of Cobb, California · 13516 days ago · 0 km deep · 3 km away
  39. 2.29 km W of Cobb, California · 13516 days ago · 2 km deep · 2 km away
  40. 2.925 km NE of Potter Valley, California · 13516 days ago · 6 km deep · 73 km away
  41. 1.822 km NE of Potter Valley, California · 13516 days ago · 7 km deep · 71 km away
  42. 1.824 km NE of Potter Valley, California · 13515 days ago · 8 km deep · 76 km away
  43. 1.622 km NE of Potter Valley, California · 13515 days ago · 7 km deep · 70 km away
  44. 1.811 km WSW of Elk Creek, California · 13515 days ago · 17 km deep · 86 km away
  45. 2.04 km W of Cobb, California · 13514 days ago · 2 km deep · 4 km away
  46. 1.95 km SW of Boonville, California · 13513 days ago · 7 km deep · 54 km away
  47. 1.86 km W of Cobb, California · 13513 days ago · 4 km deep · 3 km away
  48. 1.67 km WNW of Cobb, California · 13512 days ago · 0 km deep · 3 km away
  49. 1.66 km WSW of Cobb, California · 13511 days ago · 1 km deep · 5 km away
  50. 1.9Northern California · 13511 days ago · 2 km deep · 14 km away
  51. 2.322 km NE of Potter Valley, California · 13510 days ago · 7 km deep · 71 km away
  52. 1.921 km NE of Potter Valley, California · 13510 days ago · 7 km deep · 70 km away
  53. 2.024 km NE of Potter Valley, California · 13509 days ago · 11 km deep · 76 km away
  54. 1.724 km NE of Potter Valley, California · 13509 days ago · 11 km deep · 76 km away
  55. 3.26 km W of Cobb, California · 13508 days ago · 1 km deep · 3 km away
  56. 2.87 km W of Cobb, California · 13508 days ago · -1 km deep · 2 km away
  57. 2.06 km W of Cobb, California · 13508 days ago · 2 km deep · 3 km away
  58. 2.04 km WSW of Cobb, California · 13508 days ago · 2 km deep · 6 km away
  59. 2.55 km W of Cobb, California · 13508 days ago · -1 km deep · 4 km away
  60. 2.36 km W of Cobb, California · 13507 days ago · 4 km deep · 3 km away

The first 60 of 147.

Before

  1. 1.65 km NE of Talmage, California · 13527 days ago · 4 km deep · 46 km away
  2. 1.65 km W of Cobb, California · 13527 days ago · -1 km deep · 4 km away
  3. 2.08 km SE of Sea Ranch, California · 13527 days ago · 6 km deep · 52 km away
  4. 1.89 km SSE of Comptche, California · 13528 days ago · 0 km deep · 75 km away
  5. 2.421 km NE of Potter Valley, California · 13528 days ago · 5 km deep · 71 km away
  6. 1.88 km SE of Sea Ranch, California · 13528 days ago · 7 km deep · 51 km away
  7. 2.16 km W of Cobb, California · 13528 days ago · 1 km deep · 3 km away
  8. 2.96 km W of Cobb, California · 13528 days ago · 2 km deep · 3 km away
  9. 1.74 km W of Cobb, California · 13529 days ago · 2 km deep · 5 km away
  10. 2.44 km WSW of Cobb, California · 13529 days ago · 2 km deep · 6 km away
  11. 1.64 km WSW of Cobb, California · 13529 days ago · 1 km deep · 6 km away
  12. 2.17 km WSW of Cobb, California · 13529 days ago · 0 km deep · 3 km away
  13. 3.84 km SW of Cobb, California · 13529 days ago · 5 km deep · 6 km away
  14. 3.64 km WSW of Cobb, California · 13529 days ago · 2 km deep · 6 km away
  15. 2.04 km WSW of Cobb, California · 13529 days ago · 1 km deep · 6 km away
  16. 1.96 km E of Hopland, California · 13530 days ago · 9 km deep · 24 km away
  17. 1.612 km N of Angwin, California · 13531 days ago · 2 km deep · 37 km away
  18. 2.27 km WSW of Cobb, California · 13531 days ago · 0 km deep · 3 km away
  19. 1.88 km E of Hidden Valley Lake, California · 13531 days ago · 8 km deep · 32 km away
  20. 2.15 km WSW of Cobb, California · 13531 days ago · 2 km deep · 5 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc144495. Read Mon, Oct 5, 2026, 8:16 AM UTC.