California earthquakes

M1.7 earthquake 6 km WSW of Cobb, California

A magnitude 1.7 earthquake struck 6 km WSW of Cobb, California on Sat, Jul 21, 1979, 4:58 PM PDT (23:58 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M3.4 6 km WSW 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
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1979-07-21 23:58:31 UTC
Depth
0.7 km (0.5 mi), shallow
Epicenter
38.809° N, 122.794° 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, 0.3 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
67°
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 76 in the 60 days after this one and 46 in the 30 days before it.

After

  1. 1.73 km N of Rutherford, California · 17240 days ago · 13 km deep · 48 km away
  2. 1.914 km E of Potter Valley, California · 17240 days ago · 9 km deep · 60 km away
  3. 2.17 km WSW of Cobb, California · 17239 days ago · 2 km deep · 1 km away
  4. 1.81 km NNW of Larkfield-Wikiup, California · 17239 days ago · 3 km deep · 31 km away
  5. 1.66 km S of Green Valley, California · 17238 days ago · 8 km deep · 87 km away
  6. 1.76 km W of Cobb, California · 17237 days ago · 4 km deep · 1 km away
  7. 2.46 km WSW of Cobb, California · 17237 days ago · 1 km deep · 1 km away
  8. 1.56 km ENE of Hopland, California · 17236 days ago · 7 km deep · 30 km away
  9. 1.72 km N of Comptche, California · 17235 days ago · 4 km deep · 87 km away
  10. 1.97 km WSW of Cobb, California · 17235 days ago · -1 km deep · 1 km away
  11. 1.92 km WNW of Redwood Valley, California · 17234 days ago · 6 km deep · 64 km away
  12. 1.56 km W of Cobb, California · 17234 days ago · 3 km deep · 1 km away
  13. 2.64 km E of Philo, California · 17233 days ago · 5 km deep · 59 km away
  14. 1.64 km WSW of Cobb, California · 17231 days ago · 3 km deep · 2 km away
  15. 2.48 km WSW of Cobb, California · 17231 days ago · 4 km deep · 2 km away
  16. 1.62 km SE of Larkfield-Wikiup, California · 17231 days ago · 3 km deep · 35 km away
  17. 2.39 km WSW of Cobb, California · 17229 days ago · 1 km deep · 3 km away
  18. 1.86 km SW of Kenwood, California · 17228 days ago · 10 km deep · 50 km away
  19. 1.78 km NNE of Hopland, California · 17227 days ago · 1 km deep · 36 km away
  20. 2.17 km WSW of Cobb, California · 17226 days ago · -1 km deep · 1 km away
  21. 2.26 km N of Kenwood, California · 17226 days ago · 10 km deep · 43 km away
  22. 2.12 km NNE of Talmage, California · 17223 days ago · 6 km deep · 49 km away
  23. 1.92 km WNW of Redwood Valley, California · 17223 days ago · 6 km deep · 64 km away
  24. 1.65 km SSE of Moskowite Corner, California · 17222 days ago · 8 km deep · 71 km away
  25. 2.05 km SSW of Boonville, California · 17221 days ago · 4 km deep · 54 km away
  26. 1.83 km NNE of Hopland, California · 17221 days ago · 3 km deep · 34 km away
  27. 3.46 km WSW of Cobb, California · 17218 days ago · -1 km deep · 0 km away
  28. 1.57 km WSW of Cobb, California · 17218 days ago · 6 km deep · 2 km away
  29. 1.64 km WSW of Cobb, California · 17218 days ago · 3 km deep · 2 km away
  30. 2.31 km WSW of Fairfield, California · 17217 days ago · 15 km deep · 90 km away
  31. 1.77 km W of Cobb, California · 17216 days ago · 3 km deep · 1 km away
  32. 1.66 km WSW of Cobb, California · 17216 days ago · 0 km deep · 0 km away
  33. 2.44 km SE of Calpella, California · 17216 days ago · 6 km deep · 55 km away
  34. 1.74 km NE of Ukiah, California · 17216 days ago · 3 km deep · 53 km away
  35. 1.74 km SE of Calpella, California · 17215 days ago · 6 km deep · 55 km away
  36. 1.57 km W of Cobb, California · 17215 days ago · 3 km deep · 1 km away
  37. 2.17 km SSW of Calistoga, California · 17214 days ago · 6 km deep · 37 km away
  38. 2.03 km SSE of Green Valley, California · 17213 days ago · 4 km deep · 86 km away
  39. 1.53 km WSW of Cobb, California · 17210 days ago · 6 km deep · 3 km away
  40. 2.44 km WSW of Cobb, California · 17210 days ago · 1 km deep · 2 km away
  41. 1.54 km WSW of Cobb, California · 17210 days ago · 2 km deep · 2 km away
  42. 2.87 km WSW of Cobb, California · 17208 days ago · 1 km deep · 1 km away
  43. 1.96 km NNE of Rohnert Park, California · 17208 days ago · 10 km deep · 48 km away
  44. 1.74 km WSW of Cobb, California · 17205 days ago · 3 km deep · 2 km away
  45. 1.69 km WSW of Cobb, California · 17202 days ago · 1 km deep · 3 km away
  46. 1.56 km W of Cobb, California · 17202 days ago · 3 km deep · 1 km away
  47. 2.511 km NNW of Potter Valley, California · 17201 days ago · 9 km deep · 75 km away
  48. 1.77 km W of Cobb, California · 17201 days ago · 3 km deep · 2 km away
  49. 1.93 km SSE of Clear Lake Riviera, California · 17199 days ago · 3 km deep · 16 km away
  50. 2.39 km ESE of Hidden Valley Lake, California · 17199 days ago · 6 km deep · 30 km away
  51. 3.44 km SE of Calpella, California · 17198 days ago · 7 km deep · 54 km away
  52. 1.54 km SE of Calpella, California · 17198 days ago · 6 km deep · 54 km away
  53. 1.67 km WSW of Cobb, California · 17198 days ago · 2 km deep · 1 km away
  54. 2.010 km NE of Boonville, California · 17198 days ago · 26 km deep · 53 km away
  55. 1.734 km SSW of Sea Ranch, California · 17197 days ago · 5 km deep · 83 km away
  56. 1.624 km S of Sea Ranch, California · 17197 days ago · 37 km deep · 69 km away
  57. 1.9near the coast of Northern California · 17197 days ago · 48 km deep · 28 km away
  58. 2.39 km WSW of Cobb, California · 17197 days ago · 1 km deep · 3 km away
  59. 1.86 km W of Cobb, California · 17196 days ago · 3 km deep · 1 km away
  60. 1.64 km WSW of Cobb, California · 17195 days ago · 4 km deep · 1 km away

The first 60 of 76.

Before

  1. 1.65 km NE of Ukiah, California · 17241 days ago · 2 km deep · 53 km away
  2. 1.72 km N of Rutherford, California · 17242 days ago · 14 km deep · 48 km away
  3. 1.95 km SE of Calpella, California · 17242 days ago · 0 km deep · 54 km away
  4. 2.05 km SE of Calpella, California · 17243 days ago · 3 km deep · 54 km away
  5. 1.82 km NNW of Larkfield-Wikiup, California · 17244 days ago · 3 km deep · 30 km away
  6. 2.43 km NNW of Larkfield-Wikiup, California · 17244 days ago · 4 km deep · 30 km away
  7. 2.53 km SSW of Black Point-Green Point, California · 17244 days ago · 5 km deep · 84 km away
  8. 1.69 km W of Cobb, California · 17245 days ago · 1 km deep · 3 km away
  9. 1.911 km N of Upper Lake, California · 17245 days ago · 3 km deep · 51 km away
  10. 2.22 km NNW of Bloomfield, California · 17245 days ago · 0 km deep · 53 km away
  11. 1.818 km NNE of Nice, California · 17245 days ago · 10 km deep · 51 km away
  12. 2.37 km W of Cobb, California · 17245 days ago · 1 km deep · 2 km away
  13. 2.38 km WSW of Cobb, California · 17246 days ago · 0 km deep · 2 km away
  14. 1.82 km E of Comptche, California · 17246 days ago · 8 km deep · 84 km away
  15. 2.35 km E of Comptche, California · 17246 days ago · 8 km deep · 81 km away
  16. 1.66 km WSW of Cobb, California · 17250 days ago · 0 km deep · 0 km away
  17. 1.64 km WSW of Cobb, California · 17250 days ago · 3 km deep · 2 km away
  18. 2.58 km ESE of Willits, California · 17251 days ago · 1 km deep · 76 km away
  19. 1.73 km W of Clear Lake Riviera, California · 17251 days ago · 4 km deep · 17 km away
  20. 2.17 km ESE of Boonville, California · 17252 days ago · 2 km deep · 47 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1046702. Read Sat, Oct 3, 2026, 6:37 AM UTC.