California earthquakes

M1.9 earthquake 8 km WSW of Cobb, California

A magnitude 1.9 earthquake struck 8 km WSW of Cobb, California on Thu, May 27, 1976, 10:21 AM PDT (17:21 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.0 10 km ENE of Healdsburg, 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
1976-05-27 17:21:13 UTC
Depth
0.1 km (0.1 mi), shallow
Epicenter
38.803° N, 122.820° 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
±0.21
Depth from
From location
Station coverage gap
55°
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: 78 in the 60 days after this one and 42 in the 30 days before it.

After

  1. 2.49 km ESE of Hidden Valley Lake, California · 18387 days ago · 8 km deep · 32 km away
  2. 2.27 km W of Cobb, California · 18387 days ago · 3 km deep · 2 km away
  3. 2.410 km E of Hidden Valley Lake, California · 18386 days ago · 9 km deep · 33 km away
  4. 2.427 km WNW of Stonyford, California · 18386 days ago · 4 km deep · 75 km away
  5. 2.12 km E of Geyserville, California · 18384 days ago · 5 km deep · 12 km away
  6. 1.68 km WSW of Cobb, California · 18384 days ago · 0 km deep · 0 km away
  7. 2.07 km W of Cobb, California · 18383 days ago · 3 km deep · 2 km away
  8. 2.26 km W of Cobb, California · 18383 days ago · 3 km deep · 3 km away
  9. 2.07 km WSW of Cobb, California · 18382 days ago · 4 km deep · 1 km away
  10. 1.810 km W of Cobb, California · 18381 days ago · 1 km deep · 4 km away
  11. 1.76 km WSW of Cobb, California · 18380 days ago · 1 km deep · 2 km away
  12. 2.26 km WSW of Cobb, California · 18380 days ago · 1 km deep · 2 km away
  13. 1.96 km W of Cobb, California · 18378 days ago · 3 km deep · 2 km away
  14. 1.87 km WSW of Cobb, California · 18378 days ago · 3 km deep · 1 km away
  15. 2.37 km WSW of Cobb, California · 18376 days ago · 2 km deep · 2 km away
  16. 1.85 km W of Healdsburg, California · 18375 days ago · 2 km deep · 24 km away
  17. 2.412 km WSW of Hopland, California · 18369 days ago · 0 km deep · 40 km away
  18. 2.36 km W of Cobb, California · 18369 days ago · 3 km deep · 3 km away
  19. 2.11 km ENE of Larkfield-Wikiup, California · 18368 days ago · 3 km deep · 33 km away
  20. 2.04 km WSW of Cobb, California · 18367 days ago · 1 km deep · 5 km away
  21. 1.96 km W of Cobb, California · 18367 days ago · 0 km deep · 2 km away
  22. 1.74 km WSW of Cobb, California · 18367 days ago · 4 km deep · 4 km away
  23. 2.36 km W of Cobb, California · 18366 days ago · 4 km deep · 2 km away
  24. 1.710 km ESE of Hopland, California · 18364 days ago · 4 km deep · 23 km away
  25. 1.97 km WSW of Cobb, California · 18364 days ago · 0 km deep · 1 km away
  26. 1.86 km WSW of Cobb, California · 18364 days ago · 0 km deep · 2 km away
  27. 2.019 km W of Stonyford, California · 18362 days ago · 1 km deep · 60 km away
  28. 2.08 km W of Cobb, California · 18361 days ago · -1 km deep · 1 km away
  29. 2.29 km NE of Cloverdale, California · 18360 days ago · 4 km deep · 14 km away
  30. 1.97 km E of Hopland, California · 18360 days ago · 4 km deep · 26 km away
  31. 1.95 km E of Redwood Valley, California · 18358 days ago · 2 km deep · 59 km away
  32. 1.67 km W of Cobb, California · 18357 days ago · 0 km deep · 2 km away
  33. 1.56 km W of Cobb, California · 18356 days ago · 3 km deep · 3 km away
  34. 2.010 km SE of Boonville, California · 18356 days ago · -1 km deep · 43 km away
  35. 2.26 km ESE of Roseland, California · 18356 days ago · 9 km deep · 47 km away
  36. 2.926 km NE of Potter Valley, California · 18355 days ago · 0 km deep · 76 km away
  37. 2.42 km WSW of Moskowite Corner, California · 18353 days ago · 3 km deep · 67 km away
  38. 1.78 km WSW of Cobb, California · 18353 days ago · 0 km deep · 0 km away
  39. 1.71 km NW of Clear Lake Riviera, California · 18352 days ago · -1 km deep · 20 km away
  40. 1.71 km NW of Clear Lake Riviera, California · 18352 days ago · 0 km deep · 20 km away
  41. 1.64 km S of Soda Bay, California · 18352 days ago · 4 km deep · 18 km away
  42. 1.68 km W of Cobb, California · 18351 days ago · 2 km deep · 2 km away
  43. 2.810 km ENE of Healdsburg, California · 18350 days ago · 4 km deep · 16 km away
  44. 1.74 km WSW of Cobb, California · 18349 days ago · 2 km deep · 5 km away
  45. 1.611 km ENE of Healdsburg, California · 18349 days ago · 6 km deep · 16 km away
  46. 1.86 km WSW of Cobb, California · 18349 days ago · 1 km deep · 2 km away
  47. 1.66 km W of Cobb, California · 18348 days ago · 3 km deep · 3 km away
  48. 2.06 km W of Cobb, California · 18348 days ago · -1 km deep · 3 km away
  49. 1.95 km WSW of Cobb, California · 18348 days ago · -1 km deep · 3 km away
  50. 1.812 km ESE of Hidden Valley Lake, California · 18348 days ago · 6 km deep · 34 km away
  51. 2.214 km ESE of Hidden Valley Lake, California · 18348 days ago · 7 km deep · 36 km away
  52. 3.010 km ENE of Healdsburg, California · 18347 days ago · 4 km deep · 16 km away
  53. 1.79 km NNE of Larkfield-Wikiup, California · 18344 days ago · 7 km deep · 26 km away
  54. 2.09 km NE of Hopland, California · 18344 days ago · 5 km deep · 33 km away
  55. 1.912 km SE of Hidden Valley Lake, California · 18344 days ago · 2 km deep · 33 km away
  56. 1.84 km SW of Cobb, California · 18344 days ago · 0 km deep · 6 km away
  57. 1.64 km WSW of Cobb, California · 18341 days ago · 2 km deep · 5 km away
  58. 1.911 km NNE of Hopland, California · 18340 days ago · 4 km deep · 36 km away
  59. 2.39 km NNE of Hopland, California · 18340 days ago · 3 km deep · 34 km away
  60. 2.04 km WSW of Cobb, California · 18337 days ago · 2 km deep · 5 km away

The first 60 of 78.

Before

  1. 3.4Northern California · 18388 days ago · 8 km deep · 53 km away
  2. 2.02 km ESE of Clear Lake Riviera, California · 18389 days ago · 2 km deep · 19 km away
  3. 1.82 km SE of Clear Lake Riviera, California · 18389 days ago · 1 km deep · 18 km away
  4. 2.06 km WSW of Cobb, California · 18389 days ago · -1 km deep · 2 km away
  5. 2.118 km NE of Upper Lake, California · 18389 days ago · 6 km deep · 54 km away
  6. 2.010 km E of Hidden Valley Lake, California · 18390 days ago · 9 km deep · 33 km away
  7. 2.1Northern California · 18392 days ago · 7 km deep · 58 km away
  8. 1.67 km WSW of Cobb, California · 18393 days ago · 2 km deep · 1 km away
  9. 1.83 km NNE of Larkfield-Wikiup, California · 18394 days ago · 7 km deep · 30 km away
  10. 1.64 km WSW of Cobb, California · 18394 days ago · 4 km deep · 4 km away
  11. 2.510 km W of Philo, California · 18396 days ago · 2 km deep · 71 km away
  12. 1.77 km WSW of Cobb, California · 18396 days ago · 2 km deep · 1 km away
  13. 2.76 km W of Cobb, California · 18397 days ago · 3 km deep · 2 km away
  14. 2.16 km W of Cobb, California · 18397 days ago · 3 km deep · 2 km away
  15. 2.710 km W of Cobb, California · 18397 days ago · 2 km deep · 4 km away
  16. 1.88 km W of Cobb, California · 18397 days ago · 0 km deep · 1 km away
  17. 1.56 km WSW of Cobb, California · 18398 days ago · 0 km deep · 2 km away
  18. 2.26 km WSW of Cobb, California · 18398 days ago · 0 km deep · 2 km away
  19. 1.86 km WSW of Cobb, California · 18398 days ago · -1 km deep · 2 km away
  20. 2.38 km WSW of Cobb, California · 18398 days ago · 4 km deep · 1 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1029821. Read Wed, Sep 30, 2026, 4:09 PM UTC.