California earthquakes

M1.9 earthquake 9 km W of Cobb, California

A magnitude 1.9 earthquake struck 9 km W of Cobb, California on Tue, May 1, 1979, 4:26 AM PDT (11:26 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M2.4 11 km E of Comptche, 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), micro
Local time
UTC
1979-05-01 11:26:50 UTC
Depth
0.7 km (0.4 mi), shallow
Epicenter
38.820° N, 122.827° 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
±0.15
Depth from
From location
Station coverage gap
56°
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: 58 in the 60 days after this one and 26 in the 30 days before it.

After

  1. 2.411 km E of Comptche, California · 17311 days ago · 13 km deep · 74 km away
  2. 1.714 km NNW of Potter Valley, California · 17311 days ago · 4 km deep · 76 km away
  3. 3.06 km W of Cobb, California · 17311 days ago · 1 km deep · 3 km away
  4. 1.56 km WSW of Cobb, California · 17307 days ago · 1 km deep · 3 km away
  5. 1.94 km WSW of Guinda, California · 17306 days ago · 43 km deep · 51 km away
  6. 1.610 km E of Hidden Valley Lake, California · 17303 days ago · 10 km deep · 34 km away
  7. 1.64 km WSW of Cobb, California · 17301 days ago · 1 km deep · 5 km away
  8. 1.65 km WSW of Cobb, California · 17301 days ago · 0 km deep · 4 km away
  9. 2.22 km NNE of Deer Park, California · 17301 days ago · 11 km deep · 44 km away
  10. 2.33 km WSW of Cobb, California · 17300 days ago · 2 km deep · 6 km away
  11. 1.87 km W of Cobb, California · 17297 days ago · 1 km deep · 2 km away
  12. 2.27 km W of Cobb, California · 17296 days ago · 3 km deep · 2 km away
  13. 2.28 km WSW of Cobb, California · 17293 days ago · 1 km deep · 2 km away
  14. 2.913 km NW of Moskowite Corner, California · 17293 days ago · 11 km deep · 56 km away
  15. 2.35 km SSW of Calistoga, California · 17293 days ago · 3 km deep · 37 km away
  16. 2.13 km SSW of Green Valley, California · 17292 days ago · 10 km deep · 88 km away
  17. 1.78 km W of Cobb, California · 17291 days ago · 0 km deep · 1 km away
  18. 1.58 km WNW of Hopland, California · 17289 days ago · 2 km deep · 38 km away
  19. 1.89 km W of Cobb, California · 17288 days ago · 0 km deep · 0 km away
  20. 1.923 km ENE of Potter Valley, California · 17287 days ago · 9 km deep · 65 km away
  21. 1.86 km WNW of Cloverdale, California · 17286 days ago · 42 km deep · 22 km away
  22. 2.74 km WSW of Cobb, California · 17285 days ago · 1 km deep · 5 km away
  23. 2.77 km WSW of Cobb, California · 17285 days ago · 1 km deep · 3 km away
  24. 2.29 km NNW of Moskowite Corner, California · 17284 days ago · 16 km deep · 61 km away
  25. 1.67 km WSW of Cobb, California · 17283 days ago · 2 km deep · 3 km away
  26. 1.93 km ESE of Kenwood, California · 17281 days ago · 9 km deep · 54 km away
  27. 2.36 km S of Clear Lake Riviera, California · 17281 days ago · 2 km deep · 11 km away
  28. 1.74 km NE of Larkfield-Wikiup, California · 17281 days ago · 3 km deep · 32 km away
  29. 1.84 km NNE of Larkfield-Wikiup, California · 17281 days ago · 3 km deep · 30 km away
  30. 1.67 km W of Cobb, California · 17280 days ago · 3 km deep · 2 km away
  31. 1.75 km WSW of Cobb, California · 17279 days ago · 0 km deep · 4 km away
  32. 1.54 km WSW of Cobb, California · 17277 days ago · 1 km deep · 5 km away
  33. 1.7Northern California · 17273 days ago · 2 km deep · 2 km away
  34. 1.67 km WSW of Cobb, California · 17272 days ago · 1 km deep · 3 km away
  35. 1.68 km SW of Cloverdale, California · 17270 days ago · 3 km deep · 24 km away
  36. 2.713 km NNW of Brooktrails, California · 17268 days ago · 2 km deep · 97 km away
  37. 1.95 km NW of Potter Valley, California · 17267 days ago · 4 km deep · 66 km away
  38. 2.74 km S of Suisun, California · 17267 days ago · 37 km deep · 98 km away
  39. 1.62 km NNE of Talmage, California · 17267 days ago · 6 km deep · 46 km away
  40. 2.13 km SE of Calpella, California · 17266 days ago · 4 km deep · 53 km away
  41. 2.012 km NW of Moskowite Corner, California · 17265 days ago · 16 km deep · 57 km away
  42. 1.68 km WSW of Cobb, California · 17265 days ago · 4 km deep · 3 km away
  43. 2.77 km WSW of Cobb, California · 17265 days ago · 0 km deep · 3 km away
  44. 1.65 km NNE of Geyserville, California · 17265 days ago · -1 km deep · 9 km away
  45. 2.43 km NW of Redwood Valley, California · 17264 days ago · 2 km deep · 63 km away
  46. 1.63 km NW of Moskowite Corner, California · 17264 days ago · 11 km deep · 66 km away
  47. 3.16 km W of Cobb, California · 17263 days ago · 3 km deep · 2 km away
  48. 1.72 km NNW of Crockett, California · 17263 days ago · 8 km deep · 98 km away
  49. 1.67 km W of Cobb, California · 17262 days ago · 1 km deep · 2 km away
  50. 1.67 km WSW of Cobb, California · 17262 days ago · 1 km deep · 2 km away
  51. 1.93 km SSE of Green Valley, California · 17261 days ago · 8 km deep · 89 km away
  52. 2.06 km WSW of Kenwood, California · 17260 days ago · 8 km deep · 52 km away
  53. 3.17 km NE of Willits, California · 17259 days ago · 8 km deep · 81 km away
  54. 1.77 km WSW of Cobb, California · 17255 days ago · -1 km deep · 3 km away
  55. 1.67 km NW of Cloverdale, California · 17255 days ago · 24 km deep · 22 km away
  56. 2.17 km NNE of Cloverdale, California · 17254 days ago · 4 km deep · 16 km away
  57. 2.03 km SE of Clear Lake Riviera, California · 17252 days ago · 5 km deep · 17 km away
  58. 2.223 km ENE of Potter Valley, California · 17252 days ago · 12 km deep · 65 km away

Before

  1. 2.46 km W of Cobb, California · 17314 days ago · 1 km deep · 2 km away
  2. 2.10 km N of Hopland, California · 17316 days ago · 7 km deep · 31 km away
  3. 2.16 km WSW of Calistoga, California · 17317 days ago · 5 km deep · 34 km away
  4. 1.610 km SE of Boonville, California · 17318 days ago · 1 km deep · 43 km away
  5. 1.910 km NNW of Potter Valley, California · 17321 days ago · 4 km deep · 72 km away
  6. 2.57 km WSW of Cobb, California · 17323 days ago · 3 km deep · 3 km away
  7. 1.84 km ENE of Saint Helena, California · 17327 days ago · 10 km deep · 49 km away
  8. 1.710 km NW of Moskowite Corner, California · 17327 days ago · 5 km deep · 59 km away
  9. 2.06 km WSW of Cobb, California · 17327 days ago · 4 km deep · 3 km away
  10. 1.95 km ESE of Clearlake Oaks, California · 17327 days ago · 2 km deep · 28 km away
  11. 1.58 km WSW of Cobb, California · 17327 days ago · 4 km deep · 3 km away
  12. 2.68 km WSW of Cobb, California · 17328 days ago · 4 km deep · 3 km away
  13. 1.66 km WSW of Cobb, California · 17330 days ago · 0 km deep · 3 km away
  14. 2.46 km ENE of Vallejo, California · 17333 days ago · 0 km deep · 96 km away
  15. 1.55 km WSW of Cobb, California · 17338 days ago · 0 km deep · 4 km away
  16. 1.95 km WSW of Cobb, California · 17338 days ago · 0 km deep · 4 km away
  17. 2.03 km ESE of Talmage, California · 17339 days ago · 3 km deep · 42 km away
  18. 1.64 km SSE of Hopland, California · 17339 days ago · 7 km deep · 27 km away
  19. 1.912 km NNW of Potter Valley, California · 17339 days ago · 12 km deep · 74 km away
  20. 1.710 km NNW of Potter Valley, California · 17339 days ago · 4 km deep · 72 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1045621. Read Wed, Sep 23, 2026, 2:35 AM UTC.