California earthquakes

M1.6 earthquake 4 km WSW of Cobb, California

A magnitude 1.6 earthquake struck 4 km WSW of Cobb, California on Thu, Aug 9, 1990, 4:18 PM PDT (23:18 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M4.2 6 km W 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
1990-08-09 23:18:27 UTC
Depth
1.3 km (0.8 mi), shallow
Epicenter
38.801° N, 122.774° 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
±0.08
Depth from
From location
Station coverage gap
82°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 133 in the 60 days after this one and 85 in the 30 days before it.

After

  1. 1.69 km W of Cobb, California · 13205 days ago · 0 km deep · 6 km away
  2. 1.66 km ENE of Hidden Valley Lake, California · 13205 days ago · 6 km deep · 24 km away
  3. 1.69 km W of Cobb, California · 13205 days ago · -1 km deep · 6 km away
  4. 2.212 km NE of Rutherford, California · 13204 days ago · 0 km deep · 51 km away
  5. 1.724 km NE of Potter Valley, California · 13204 days ago · 7 km deep · 74 km away
  6. 1.87 km W of Cobb, California · 13203 days ago · 3 km deep · 4 km away
  7. 3.110 km W of Cobb, California · 13203 days ago · -1 km deep · 6 km away
  8. 1.75 km SW of Cobb, California · 13201 days ago · 2 km deep · 2 km away
  9. 1.85 km WSW of Cobb, California · 13201 days ago · 2 km deep · 1 km away
  10. 2.98 km W of Cobb, California · 13201 days ago · 0 km deep · 5 km away
  11. 1.68 km W of Cobb, California · 13201 days ago · 1 km deep · 5 km away
  12. 3.29 km WNW of Cobb, California · 13201 days ago · -1 km deep · 6 km away
  13. 3.18 km W of Cobb, California · 13201 days ago · 0 km deep · 6 km away
  14. 1.68 km W of Cobb, California · 13201 days ago · 1 km deep · 6 km away
  15. 2.28 km W of Cobb, California · 13201 days ago · 1 km deep · 6 km away
  16. 4.26 km W of Cobb, California · 13201 days ago · 1 km deep · 3 km away
  17. 1.75 km W of Cobb, California · 13201 days ago · 0 km deep · 3 km away
  18. 2.06 km WNW of Cobb, California · 13201 days ago · 1 km deep · 5 km away
  19. 1.84 km SW of Cobb, California · 13201 days ago · 0 km deep · 2 km away
  20. 2.15 km WSW of Cobb, California · 13201 days ago · 0 km deep · 1 km away
  21. 2.15 km W of Cobb, California · 13200 days ago · 2 km deep · 2 km away
  22. 2.09 km W of Cobb, California · 13199 days ago · 1 km deep · 5 km away
  23. 1.62 km SW of Cobb, California · 13199 days ago · 1 km deep · 3 km away
  24. 1.68 km E of Geyserville, California · 13199 days ago · 4 km deep · 11 km away
  25. 2.01 km S of Redwood Valley, California · 13199 days ago · 6 km deep · 63 km away
  26. 1.65 km SSW of Cobb, California · 13193 days ago · 1 km deep · 4 km away
  27. 2.16 km W of Cobb, California · 13192 days ago · 3 km deep · 3 km away
  28. 2.623 km NE of Potter Valley, California · 13192 days ago · 9 km deep · 79 km away
  29. 2.424 km NE of Potter Valley, California · 13192 days ago · 9 km deep · 79 km away
  30. 1.93 km SW of Cobb, California · 13191 days ago · 1 km deep · 2 km away
  31. 2.35 km SW of Cobb, California · 13191 days ago · 2 km deep · 2 km away
  32. 2.55 km SW of Cobb, California · 13190 days ago · 1 km deep · 2 km away
  33. 2.812 km WNW of Ukiah, California · 13190 days ago · 3 km deep · 66 km away
  34. 1.66 km W of Cobb, California · 13189 days ago · 0 km deep · 3 km away
  35. 1.73 km NNE of Glen Ellen, California · 13188 days ago · 0 km deep · 51 km away
  36. 2.33 km SSW of Cobb, California · 13187 days ago · 1 km deep · 3 km away
  37. 1.65 km SW of Cobb, California · 13187 days ago · 0 km deep · 1 km away
  38. 2.27 km N of Hopland, California · 13186 days ago · 0 km deep · 41 km away
  39. 2.37 km N of Hopland, California · 13186 days ago · 3 km deep · 40 km away
  40. 2.04 km WSW of Cobb, California · 13186 days ago · 2 km deep · 1 km away
  41. 1.95 km ENE of Kenwood, California · 13185 days ago · 12 km deep · 49 km away
  42. 1.710 km SE of Boonville, California · 13185 days ago · 6 km deep · 46 km away
  43. 2.117 km ENE of Potter Valley, California · 13183 days ago · 7 km deep · 66 km away
  44. 1.97 km S of Cobb, California · 13183 days ago · 1 km deep · 7 km away
  45. 2.29 km W of Cobb, California · 13183 days ago · 0 km deep · 6 km away
  46. 2.76 km WSW of Cobb, California · 13182 days ago · 0 km deep · 1 km away
  47. 2.26 km WSW of Cobb, California · 13182 days ago · 0 km deep · 1 km away
  48. 2.04 km WSW of Cobb, California · 13181 days ago · 1 km deep · 0 km away
  49. 2.55 km WSW of Cobb, California · 13181 days ago · 1 km deep · 1 km away
  50. 2.66 km W of Cobb, California · 13181 days ago · 2 km deep · 4 km away
  51. 2.19 km ESE of Willits, California · 13180 days ago · 1 km deep · 75 km away
  52. 1.86 km W of Cobb, California · 13180 days ago · 3 km deep · 3 km away
  53. 1.93 km SSW of Cobb, California · 13180 days ago · 2 km deep · 3 km away
  54. 1.73 km SSE of Clear Lake Riviera, California · 13179 days ago · -1 km deep · 15 km away
  55. 2.022 km ENE of Potter Valley, California · 13179 days ago · 6 km deep · 63 km away
  56. 1.59 km W of Cobb, California · 13179 days ago · 0 km deep · 6 km away
  57. 2.310 km ESE of Willits, California · 13178 days ago · 3 km deep · 75 km away
  58. 2.85 km WSW of Cobb, California · 13178 days ago · 0 km deep · 1 km away
  59. 1.95 km W of Cobb, California · 13178 days ago · 2 km deep · 2 km away
  60. 1.910 km SE of Willits, California · 13178 days ago · 2 km deep · 74 km away

The first 60 of 133.

Before

  1. 2.122 km NE of Potter Valley, California · 13206 days ago · 7 km deep · 74 km away
  2. 2.67 km ESE of Potter Valley, California · 13208 days ago · 4 km deep · 60 km away
  3. 2.79 km W of Cobb, California · 13208 days ago · -1 km deep · 5 km away
  4. 2.15 km WSW of Cobb, California · 13208 days ago · -1 km deep · 1 km away
  5. 2.46 km SW of Cobb, California · 13208 days ago · 0 km deep · 1 km away
  6. 1.78 km N of Hopland, California · 13208 days ago · 5 km deep · 42 km away
  7. 1.96 km W of Cobb, California · 13209 days ago · -1 km deep · 3 km away
  8. 1.76 km WSW of Kenwood, California · 13209 days ago · 7 km deep · 48 km away
  9. 1.93 km SSW of Cobb, California · 13210 days ago · 2 km deep · 3 km away
  10. 1.94 km W of Cobb, California · 13210 days ago · 2 km deep · 2 km away
  11. 1.55 km W of Cobb, California · 13211 days ago · 1 km deep · 3 km away
  12. 1.97 km W of Lakeport, California · 13211 days ago · 22 km deep · 33 km away
  13. 2.26 km W of Cobb, California · 13211 days ago · -1 km deep · 3 km away
  14. 2.56 km WSW of Cobb, California · 13211 days ago · -1 km deep · 1 km away
  15. 2.65 km SW of Cobb, California · 13211 days ago · 1 km deep · 1 km away
  16. 1.56 km E of San Rafael, California · 13212 days ago · 5 km deep · 97 km away
  17. 2.57 km S of Cobb, California · 13213 days ago · 0 km deep · 7 km away
  18. 1.69 km W of Cobb, California · 13214 days ago · -1 km deep · 5 km away
  19. 2.58 km W of Cobb, California · 13215 days ago · 1 km deep · 5 km away
  20. 2.68 km W of Cobb, California · 13215 days ago · 1 km deep · 5 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc162424. Read Mon, Oct 5, 2026, 8:08 AM UTC.