California earthquakes

M1.5 earthquake 7 km W of Cobb, California

A magnitude 1.5 earthquake struck 7 km W of Cobb, California on Sun, Aug 26, 1984, 5:23 AM PDT (12:23 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M4.3 11 km ENE of Clearlake, 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
1.5 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1984-08-26 12:23:14 UTC
Depth
3.1 km (1.9 mi), shallow
Epicenter
38.813° N, 122.810° 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
±0.13
Depth from
From location
Station coverage gap
78°
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 178 in the 60 days after this one and 67 in the 30 days before it.

After

  1. 1.816 km NNE of Upper Lake, California · 15378 days ago · 7 km deep · 54 km away
  2. 2.46 km WSW of Cobb, California · 15377 days ago · 1 km deep · 1 km away
  3. 1.710 km NNE of Cloverdale, California · 15377 days ago · 5 km deep · 18 km away
  4. 1.65 km W of Cobb, California · 15377 days ago · 0 km deep · 2 km away
  5. 2.48 km NNE of Hopland, California · 15377 days ago · 1 km deep · 35 km away
  6. 1.58 km S of Calistoga, California · 15377 days ago · 7 km deep · 40 km away
  7. 2.05 km SW of Cobb, California · 15376 days ago · 0 km deep · 4 km away
  8. 2.66 km WSW of Cobb, California · 15376 days ago · -1 km deep · 3 km away
  9. 2.823 km NNE of Potter Valley, California · 15376 days ago · 4 km deep · 79 km away
  10. 2.13 km W of Cloverdale, California · 15376 days ago · 17 km deep · 22 km away
  11. 1.76 km WSW of Cobb, California · 15376 days ago · 3 km deep · 1 km away
  12. 1.76 km WSW of Cobb, California · 15376 days ago · 3 km deep · 1 km away
  13. 1.78 km NNE of Hopland, California · 15376 days ago · 0 km deep · 35 km away
  14. 2.46 km WSW of Cobb, California · 15376 days ago · 3 km deep · 2 km away
  15. 1.66 km WSW of Cobb, California · 15376 days ago · 3 km deep · 1 km away
  16. 1.610 km SW of Hopland, California · 15375 days ago · 4 km deep · 36 km away
  17. 2.010 km WSW of Cobb, California · 15375 days ago · 2 km deep · 3 km away
  18. 1.710 km WSW of Cobb, California · 15375 days ago · 2 km deep · 3 km away
  19. 1.51 km NNW of Calpella, California · 15375 days ago · 6 km deep · 59 km away
  20. 2.022 km SSE of Covelo, California · 15375 days ago · 3 km deep · 94 km away
  21. 1.919 km NNE of Upper Lake, California · 15374 days ago · 5 km deep · 57 km away
  22. 2.04 km NE of Clearlake, California · 15374 days ago · 2 km deep · 27 km away
  23. 1.58 km W of Cobb, California · 15374 days ago · 1 km deep · 1 km away
  24. 1.57 km W of Cobb, California · 15374 days ago · 5 km deep · 1 km away
  25. 2.416 km W of Williams, California · 15373 days ago · 1 km deep · 55 km away
  26. 2.34 km WNW of Lucas Valley-Marinwood, California · 15373 days ago · 3 km deep · 86 km away
  27. 1.76 km W of Cobb, California · 15372 days ago · 1 km deep · 2 km away
  28. 1.67 km ENE of Willits, California · 15371 days ago · 4 km deep · 80 km away
  29. 1.67 km ENE of Willits, California · 15371 days ago · 3 km deep · 79 km away
  30. 1.67 km ENE of Willits, California · 15371 days ago · 4 km deep · 80 km away
  31. 1.811 km SW of Hopland, California · 15371 days ago · 4 km deep · 37 km away
  32. 1.77 km ENE of Willits, California · 15371 days ago · 5 km deep · 79 km away
  33. 1.56 km W of Cobb, California · 15371 days ago · 1 km deep · 1 km away
  34. 1.66 km W of Cobb, California · 15371 days ago · 3 km deep · 1 km away
  35. 2.215 km ESE of Hidden Valley Lake, California · 15370 days ago · 0 km deep · 37 km away
  36. 2.75 km N of Redwood Valley, California · 15370 days ago · 42 km deep · 65 km away
  37. 1.65 km W of Cobb, California · 15370 days ago · 0 km deep · 2 km away
  38. 1.65 km SW of Moskowite Corner, California · 15368 days ago · 0 km deep · 67 km away
  39. 1.88 km W of Cobb, California · 15367 days ago · 1 km deep · 1 km away
  40. 2.09 km SE of Hopland, California · 15367 days ago · 0 km deep · 23 km away
  41. 2.116 km E of Angwin, California · 15366 days ago · 7 km deep · 54 km away
  42. 1.93 km NNE of Talmage, California · 15365 days ago · 6 km deep · 49 km away
  43. 1.95 km SW of Cobb, California · 15365 days ago · 0 km deep · 4 km away
  44. 1.710 km WNW of Williams, California · 15365 days ago · 4 km deep · 62 km away
  45. 3.05 km SW of Cobb, California · 15364 days ago · 0 km deep · 4 km away
  46. 1.85 km SW of Cobb, California · 15364 days ago · -1 km deep · 4 km away
  47. 2.15 km SW of Cobb, California · 15364 days ago · 0 km deep · 4 km away
  48. 1.86 km W of Cobb, California · 15364 days ago · 3 km deep · 1 km away
  49. 1.63 km NNE of Larkfield-Wikiup, California · 15364 days ago · 7 km deep · 31 km away
  50. 1.98 km W of Cobb, California · 15364 days ago · -1 km deep · 1 km away
  51. 1.86 km W of Cobb, California · 15364 days ago · 0 km deep · 2 km away
  52. 1.78 km WSW of Cobb, California · 15363 days ago · 0 km deep · 2 km away
  53. 1.96 km W of Cobb, California · 15363 days ago · 3 km deep · 1 km away
  54. 1.67 km WSW of Cobb, California · 15362 days ago · 2 km deep · 1 km away
  55. 1.86 km W of Cobb, California · 15361 days ago · 4 km deep · 1 km away
  56. 2.36 km W of Cobb, California · 15361 days ago · 2 km deep · 1 km away
  57. 2.24 km SSW of Green Valley, California · 15361 days ago · 6 km deep · 86 km away
  58. 1.86 km W of Cobb, California · 15361 days ago · 3 km deep · 1 km away
  59. 1.65 km SSW of Philo, California · 15360 days ago · -1 km deep · 61 km away
  60. 1.92 km ESE of Deer Park, California · 15360 days ago · 0 km deep · 46 km away

The first 60 of 178.

Before

  1. 2.93 km E of Redwood Valley, California · 15379 days ago · 6 km deep · 59 km away
  2. 2.06 km WSW of Cobb, California · 15379 days ago · 0 km deep · 2 km away
  3. 1.57 km W of Cobb, California · 15379 days ago · 1 km deep · 1 km away
  4. 2.04 km WSW of Cobb, California · 15380 days ago · 1 km deep · 4 km away
  5. 2.57 km WSW of Cobb, California · 15380 days ago · 0 km deep · 1 km away
  6. 1.75 km SW of Cobb, California · 15381 days ago · 0 km deep · 4 km away
  7. 1.79 km WSW of Cobb, California · 15383 days ago · 2 km deep · 2 km away
  8. 2.45 km SW of Cottonwood, California · 15383 days ago · 1 km deep · 72 km away
  9. 1.65 km E of Healdsburg, California · 15383 days ago · 1 km deep · 23 km away
  10. 1.917 km WSW of Guinda, California · 15384 days ago · 5 km deep · 39 km away
  11. 2.35 km WSW of Cobb, California · 15384 days ago · 1 km deep · 3 km away
  12. 1.85 km SW of Cobb, California · 15384 days ago · 1 km deep · 6 km away
  13. 1.66 km W of Cobb, California · 15385 days ago · 3 km deep · 2 km away
  14. 1.612 km ESE of Hidden Valley Lake, California · 15386 days ago · 1 km deep · 33 km away
  15. 2.13 km SE of Clearlake Oaks, California · 15387 days ago · 2 km deep · 25 km away
  16. 1.76 km W of Cobb, California · 15387 days ago · 3 km deep · 1 km away
  17. 1.76 km W of Cobb, California · 15388 days ago · 3 km deep · 1 km away
  18. 2.68 km WSW of Cobb, California · 15389 days ago · 3 km deep · 2 km away
  19. 1.66 km W of Cobb, California · 15389 days ago · 3 km deep · 2 km away
  20. 1.75 km SW of Cobb, California · 15389 days ago · 0 km deep · 4 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc26396. Read Sat, Oct 3, 2026, 1:17 PM UTC.