California earthquakes

M1.5 earthquake 6 km S of Cobb, California

A magnitude 1.5 earthquake struck 6 km S of Cobb, California on Sat, Jul 28, 1990, 5:40 AM PDT (12:40 UTC), 1 km (0 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.5 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-07-28 12:40:46 UTC
Depth
0.7 km (0.4 mi), shallow
Epicenter
38.759° N, 122.726° 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, 0.4 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
83°
Stations used
14

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 139 in the 60 days after this one and 81 in the 30 days before it.

After

  1. 2.07 km WSW of Cobb, California · 13217 days ago · 4 km deep · 8 km away
  2. 2.15 km W of Cobb, California · 13217 days ago · 0 km deep · 8 km away
  3. 1.55 km E of Yountville, California · 13216 days ago · 17 km deep · 55 km away
  4. 1.87 km W of Cobb, California · 13216 days ago · 3 km deep · 10 km away
  5. 1.75 km ENE of Santa Rosa, California · 13216 days ago · 6 km deep · 35 km away
  6. 1.99 km WNW of Cobb, California · 13216 days ago · 1 km deep · 13 km away
  7. 1.69 km WNW of Cobb, California · 13216 days ago · 0 km deep · 14 km away
  8. 1.59 km WNW of Cobb, California · 13216 days ago · 2 km deep · 13 km away
  9. 1.69 km WNW of Cobb, California · 13216 days ago · 1 km deep · 13 km away
  10. 1.99 km WNW of Cobb, California · 13216 days ago · 0 km deep · 14 km away
  11. 1.51 km ESE of Clearlake, California · 13215 days ago · 3 km deep · 24 km away
  12. 2.311 km ESE of Hidden Valley Lake, California · 13215 days ago · 5 km deep · 25 km away
  13. 2.09 km WNW of Cobb, California · 13215 days ago · 1 km deep · 14 km away
  14. 2.4Northern California · 13215 days ago · 1 km deep · 7 km away
  15. 2.68 km W of Cobb, California · 13215 days ago · 1 km deep · 11 km away
  16. 2.58 km W of Cobb, California · 13215 days ago · 1 km deep · 11 km away
  17. 1.69 km W of Cobb, California · 13214 days ago · -1 km deep · 11 km away
  18. 2.57 km S of Cobb, California · 13213 days ago · 0 km deep · 1 km away
  19. 1.56 km E of San Rafael, California · 13211 days ago · 5 km deep · 92 km away
  20. 2.65 km SW of Cobb, California · 13211 days ago · 1 km deep · 6 km away
  21. 2.56 km WSW of Cobb, California · 13211 days ago · -1 km deep · 7 km away
  22. 2.26 km W of Cobb, California · 13211 days ago · -1 km deep · 9 km away
  23. 1.97 km W of Lakeport, California · 13211 days ago · 22 km deep · 39 km away
  24. 1.55 km W of Cobb, California · 13211 days ago · 1 km deep · 9 km away
  25. 1.94 km W of Cobb, California · 13209 days ago · 2 km deep · 8 km away
  26. 1.93 km SSW of Cobb, California · 13209 days ago · 2 km deep · 4 km away
  27. 1.76 km WSW of Kenwood, California · 13208 days ago · 7 km deep · 42 km away
  28. 1.96 km W of Cobb, California · 13208 days ago · -1 km deep · 10 km away
  29. 1.78 km N of Hopland, California · 13208 days ago · 5 km deep · 48 km away
  30. 2.46 km SW of Cobb, California · 13208 days ago · 0 km deep · 6 km away
  31. 2.15 km WSW of Cobb, California · 13208 days ago · -1 km deep · 7 km away
  32. 2.79 km W of Cobb, California · 13208 days ago · -1 km deep · 11 km away
  33. 2.67 km ESE of Potter Valley, California · 13207 days ago · 4 km deep · 66 km away
  34. 2.122 km NE of Potter Valley, California · 13205 days ago · 7 km deep · 79 km away
  35. 1.64 km WSW of Cobb, California · 13205 days ago · 1 km deep · 6 km away
  36. 1.69 km W of Cobb, California · 13205 days ago · 0 km deep · 12 km away
  37. 1.66 km ENE of Hidden Valley Lake, California · 13204 days ago · 6 km deep · 22 km away
  38. 1.69 km W of Cobb, California · 13204 days ago · -1 km deep · 12 km away
  39. 2.212 km NE of Rutherford, California · 13204 days ago · 0 km deep · 45 km away
  40. 1.724 km NE of Potter Valley, California · 13203 days ago · 7 km deep · 79 km away
  41. 1.87 km W of Cobb, California · 13202 days ago · 3 km deep · 10 km away
  42. 3.110 km W of Cobb, California · 13202 days ago · -1 km deep · 12 km away
  43. 1.75 km SW of Cobb, California · 13201 days ago · 2 km deep · 5 km away
  44. 1.85 km WSW of Cobb, California · 13200 days ago · 2 km deep · 6 km away
  45. 2.98 km W of Cobb, California · 13200 days ago · 0 km deep · 12 km away
  46. 1.68 km W of Cobb, California · 13200 days ago · 1 km deep · 12 km away
  47. 3.29 km WNW of Cobb, California · 13200 days ago · -1 km deep · 12 km away
  48. 3.18 km W of Cobb, California · 13200 days ago · 0 km deep · 12 km away
  49. 1.68 km W of Cobb, California · 13200 days ago · 1 km deep · 12 km away
  50. 2.28 km W of Cobb, California · 13200 days ago · 1 km deep · 12 km away
  51. 4.26 km W of Cobb, California · 13200 days ago · 1 km deep · 9 km away
  52. 1.75 km W of Cobb, California · 13200 days ago · 0 km deep · 10 km away
  53. 2.06 km WNW of Cobb, California · 13200 days ago · 1 km deep · 11 km away
  54. 1.84 km SW of Cobb, California · 13200 days ago · 0 km deep · 4 km away
  55. 2.15 km WSW of Cobb, California · 13200 days ago · 0 km deep · 8 km away
  56. 2.15 km W of Cobb, California · 13200 days ago · 2 km deep · 8 km away
  57. 2.09 km W of Cobb, California · 13199 days ago · 1 km deep · 11 km away
  58. 1.62 km SW of Cobb, California · 13199 days ago · 1 km deep · 5 km away
  59. 1.68 km E of Geyserville, California · 13199 days ago · 4 km deep · 9 km away
  60. 2.01 km S of Redwood Valley, California · 13198 days ago · 6 km deep · 69 km away

The first 60 of 139.

Before

  1. 1.59 km NE of Cloverdale, California · 13218 days ago · 3 km deep · 23 km away
  2. 1.69 km W of Cobb, California · 13218 days ago · 1 km deep · 13 km away
  3. 2.05 km SW of Cobb, California · 13219 days ago · 0 km deep · 5 km away
  4. 2.16 km W of Cobb, California · 13220 days ago · -1 km deep · 9 km away
  5. 2.716 km NNE of Nice, California · 13220 days ago · 5 km deep · 55 km away
  6. 1.57 km S of Temelec, California · 13220 days ago · 5 km deep · 66 km away
  7. 2.89 km W of Cobb, California · 13221 days ago · 1 km deep · 12 km away
  8. 1.66 km W of Cobb, California · 13221 days ago · 1 km deep · 9 km away
  9. 2.21 km W of Larkfield-Wikiup, California · 13222 days ago · 3 km deep · 28 km away
  10. 1.73 km NE of Clearlake, California · 13222 days ago · -1 km deep · 27 km away
  11. 2.16 km WSW of Cobb, California · 13222 days ago · 1 km deep · 9 km away
  12. 2.46 km SW of Cobb, California · 13223 days ago · 3 km deep · 6 km away
  13. 1.60 km E of Cloverdale, California · 13224 days ago · 4 km deep · 25 km away
  14. 1.921 km NE of Potter Valley, California · 13224 days ago · 7 km deep · 79 km away
  15. 1.83 km W of Cobb, California · 13224 days ago · 0 km deep · 8 km away
  16. 2.08 km NE of Hopland, California · 13225 days ago · 5 km deep · 42 km away
  17. 1.79 km WNW of Cobb, California · 13225 days ago · 2 km deep · 13 km away
  18. 1.92 km SSW of Cobb, California · 13225 days ago · 2 km deep · 5 km away
  19. 1.87 km N of Geyserville, California · 13226 days ago · 4 km deep · 15 km away
  20. 1.99 km N of Hopland, California · 13226 days ago · 6 km deep · 48 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc161813. Read Sun, Oct 4, 2026, 6:50 PM UTC.