California earthquakes

M1.7 earthquake 9 km WNW of Cobb, California

A magnitude 1.7 earthquake struck 9 km WNW of Cobb, California on Fri, Jul 20, 1990, 10:51 PM PDT (05:51 UTC), 2 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.

Open the live map with earthquakes

The earthquake

Magnitude
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1990-07-21 05:51:24 UTC
Depth
1.6 km (1.0 mi), shallow
Epicenter
38.842° N, 122.826° 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, 0.5 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
50°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 144 in the 60 days after this one and 93 in the 30 days before it.

After

  1. 2.08 km NE of Hopland, California · 13225 days ago · 5 km deep · 29 km away
  2. 1.83 km W of Cobb, California · 13225 days ago · 0 km deep · 6 km away
  3. 1.921 km NE of Potter Valley, California · 13224 days ago · 7 km deep · 69 km away
  4. 1.60 km E of Cloverdale, California · 13224 days ago · 4 km deep · 16 km away
  5. 2.46 km SW of Cobb, California · 13224 days ago · 3 km deep · 7 km away
  6. 2.16 km WSW of Cobb, California · 13223 days ago · 1 km deep · 4 km away
  7. 1.73 km NE of Clearlake, California · 13223 days ago · -1 km deep · 25 km away
  8. 2.21 km W of Larkfield-Wikiup, California · 13222 days ago · 3 km deep · 37 km away
  9. 1.66 km W of Cobb, California · 13222 days ago · 1 km deep · 4 km away
  10. 2.89 km W of Cobb, California · 13221 days ago · 1 km deep · 2 km away
  11. 1.57 km S of Temelec, California · 13221 days ago · 5 km deep · 78 km away
  12. 2.716 km NNE of Nice, California · 13221 days ago · 5 km deep · 46 km away
  13. 2.16 km W of Cobb, California · 13220 days ago · -1 km deep · 4 km away
  14. 2.05 km SW of Cobb, California · 13219 days ago · 0 km deep · 8 km away
  15. 1.69 km W of Cobb, California · 13218 days ago · 1 km deep · 1 km away
  16. 1.59 km NE of Cloverdale, California · 13218 days ago · 3 km deep · 11 km away
  17. 1.56 km S of Cobb, California · 13218 days ago · 1 km deep · 13 km away
  18. 2.07 km WSW of Cobb, California · 13218 days ago · 4 km deep · 6 km away
  19. 3.015 km N of Brooktrails, California · 13217 days ago · 4 km deep · 94 km away
  20. 1.8near the coast of Northern California · 13217 days ago · 3 km deep · 97 km away
  21. 2.015 km SE of Laytonville, California · 13217 days ago · 0 km deep · 95 km away
  22. 2.0near the coast of Northern California · 13217 days ago · 0 km deep · 95 km away
  23. 1.914 km SE of Laytonville, California · 13217 days ago · 0 km deep · 95 km away
  24. 2.314 km N of Brooktrails, California · 13217 days ago · -1 km deep · 94 km away
  25. 2.15 km W of Cobb, California · 13217 days ago · 0 km deep · 4 km away
  26. 1.55 km E of Yountville, California · 13217 days ago · 17 km deep · 67 km away
  27. 1.87 km W of Cobb, California · 13217 days ago · 3 km deep · 3 km away
  28. 1.75 km ENE of Santa Rosa, California · 13216 days ago · 6 km deep · 46 km away
  29. 1.99 km WNW of Cobb, California · 13216 days ago · 1 km deep · 1 km away
  30. 1.69 km WNW of Cobb, California · 13216 days ago · 0 km deep · 1 km away
  31. 1.59 km WNW of Cobb, California · 13216 days ago · 2 km deep · 1 km away
  32. 1.69 km WNW of Cobb, California · 13216 days ago · 1 km deep · 1 km away
  33. 1.99 km WNW of Cobb, California · 13216 days ago · 0 km deep · 1 km away
  34. 1.51 km ESE of Clearlake, California · 13216 days ago · 3 km deep · 22 km away
  35. 2.311 km ESE of Hidden Valley Lake, California · 13216 days ago · 5 km deep · 35 km away
  36. 2.09 km WNW of Cobb, California · 13215 days ago · 1 km deep · 2 km away
  37. 2.4Northern California · 13215 days ago · 1 km deep · 6 km away
  38. 2.68 km W of Cobb, California · 13215 days ago · 1 km deep · 2 km away
  39. 2.58 km W of Cobb, California · 13215 days ago · 1 km deep · 2 km away
  40. 1.614 km SE of Laytonville, California · 13214 days ago · 6 km deep · 95 km away
  41. 1.69 km W of Cobb, California · 13214 days ago · -1 km deep · 3 km away
  42. 2.57 km S of Cobb, California · 13213 days ago · 0 km deep · 13 km away
  43. 2.65 km SW of Cobb, California · 13211 days ago · 1 km deep · 7 km away
  44. 2.56 km WSW of Cobb, California · 13211 days ago · -1 km deep · 6 km away
  45. 2.26 km W of Cobb, California · 13211 days ago · -1 km deep · 3 km away
  46. 1.97 km W of Lakeport, California · 13211 days ago · 22 km deep · 27 km away
  47. 1.55 km W of Cobb, California · 13211 days ago · 1 km deep · 4 km away
  48. 1.94 km W of Cobb, California · 13209 days ago · 2 km deep · 5 km away
  49. 1.93 km SSW of Cobb, California · 13209 days ago · 2 km deep · 9 km away
  50. 1.76 km WSW of Kenwood, California · 13209 days ago · 7 km deep · 53 km away
  51. 1.96 km W of Cobb, California · 13208 days ago · -1 km deep · 3 km away
  52. 1.78 km N of Hopland, California · 13208 days ago · 5 km deep · 35 km away
  53. 2.46 km SW of Cobb, California · 13208 days ago · 0 km deep · 7 km away
  54. 2.15 km WSW of Cobb, California · 13208 days ago · -1 km deep · 6 km away
  55. 2.79 km W of Cobb, California · 13208 days ago · -1 km deep · 3 km away
  56. 2.67 km ESE of Potter Valley, California · 13207 days ago · 4 km deep · 54 km away
  57. 2.122 km NE of Potter Valley, California · 13206 days ago · 7 km deep · 69 km away
  58. 1.64 km WSW of Cobb, California · 13205 days ago · 1 km deep · 6 km away
  59. 1.69 km W of Cobb, California · 13205 days ago · 0 km deep · 2 km away
  60. 1.66 km ENE of Hidden Valley Lake, California · 13205 days ago · 6 km deep · 29 km away

The first 60 of 144.

Before

  1. 1.92 km SSW of Cobb, California · 13225 days ago · 2 km deep · 9 km away
  2. 1.87 km N of Geyserville, California · 13226 days ago · 4 km deep · 10 km away
  3. 1.99 km N of Hopland, California · 13226 days ago · 6 km deep · 35 km away
  4. 1.95 km W of Cobb, California · 13226 days ago · 2 km deep · 5 km away
  5. 2.27 km N of Geyserville, California · 13226 days ago · 4 km deep · 10 km away
  6. 1.85 km WSW of Cobb, California · 13227 days ago · -1 km deep · 6 km away
  7. 1.510 km W of Cobb, California · 13227 days ago · 1 km deep · 3 km away
  8. 1.5Northern California · 13228 days ago · 0 km deep · 11 km away
  9. 1.96 km WSW of Cobb, California · 13228 days ago · -1 km deep · 6 km away
  10. 1.64 km W of Cobb, California · 13229 days ago · -1 km deep · 5 km away
  11. 1.77 km N of Geyserville, California · 13230 days ago · 4 km deep · 10 km away
  12. 1.77 km N of Geyserville, California · 13230 days ago · 4 km deep · 10 km away
  13. 1.67 km W of Middletown, California · 13230 days ago · 1 km deep · 15 km away
  14. 2.36 km S of Hopland, California · 13231 days ago · 7 km deep · 26 km away
  15. 3.17 km ENE of Brooktrails, California · 13232 days ago · -1 km deep · 81 km away
  16. 1.97 km WSW of Calistoga, California · 13232 days ago · 1 km deep · 35 km away
  17. 2.28 km WSW of Cobb, California · 13233 days ago · -1 km deep · 4 km away
  18. 3.08 km WSW of Cobb, California · 13233 days ago · 0 km deep · 5 km away
  19. 2.48 km WSW of Cobb, California · 13233 days ago · 0 km deep · 5 km away
  20. 1.67 km ENE of Brooktrails, California · 13234 days ago · 10 km deep · 81 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc161425. Read Mon, Oct 5, 2026, 3:09 AM UTC.