California earthquakes

M1.7 earthquake 7 km W of Cobb, California

A magnitude 1.7 earthquake struck 7 km W of Cobb, California on Sat, May 26, 1984, 7:00 PM PDT (02:00 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.2 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.

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The earthquake

Magnitude
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1984-05-27 02:00:30 UTC
Depth
0.4 km (0.3 mi), shallow
Epicenter
38.831° N, 122.804° 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 0.6 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.29
Depth from
From location
Station coverage gap
100°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 171 in the 60 days after this one and 95 in the 30 days before it.

After

  1. 1.65 km WSW of Cobb, California · 15468 days ago · 1 km deep · 4 km away
  2. 1.616 km ENE of Potter Valley, California · 15468 days ago · 7 km deep · 64 km away
  3. 1.92 km WSW of Cobb, California · 15467 days ago · -1 km deep · 4 km away
  4. 1.73 km SW of Cobb, California · 15467 days ago · 1 km deep · 6 km away
  5. 1.57 km W of Potter Valley, California · 15467 days ago · 8 km deep · 65 km away
  6. 1.76 km W of Cobb, California · 15467 days ago · 3 km deep · 1 km away
  7. 1.68 km W of Cobb, California · 15467 days ago · -1 km deep · 3 km away
  8. 2.28 km SW of Cobb, California · 15467 days ago · -1 km deep · 7 km away
  9. 3.08 km W of Cobb, California · 15467 days ago · -1 km deep · 1 km away
  10. 2.67 km WSW of Cobb, California · 15466 days ago · 3 km deep · 3 km away
  11. 3.17 km WSW of Cobb, California · 15466 days ago · 1 km deep · 3 km away
  12. 1.77 km WSW of Cobb, California · 15466 days ago · 4 km deep · 4 km away
  13. 2.14 km NE of Willits, California · 15465 days ago · 1 km deep · 81 km away
  14. 2.15 km SW of Cobb, California · 15465 days ago · 1 km deep · 5 km away
  15. 1.521 km NE of Potter Valley, California · 15464 days ago · 4 km deep · 73 km away
  16. 1.517 km NE of Potter Valley, California · 15464 days ago · 3 km deep · 70 km away
  17. 1.83 km W of Cobb, California · 15464 days ago · -1 km deep · 3 km away
  18. 1.65 km SW of Moskowite Corner, California · 15464 days ago · 11 km deep · 68 km away
  19. 1.517 km N of Potter Valley, California · 15464 days ago · 8 km deep · 77 km away
  20. 1.86 km W of Cobb, California · 15464 days ago · 2 km deep · 2 km away
  21. 1.85 km W of Cobb, California · 15463 days ago · 1 km deep · 2 km away
  22. 1.66 km W of Cobb, California · 15463 days ago · 3 km deep · 1 km away
  23. 1.65 km W of Cobb, California · 15463 days ago · 0 km deep · 1 km away
  24. 1.55 km W of Cobb, California · 15463 days ago · 0 km deep · 2 km away
  25. 1.8Northern California · 15463 days ago · 1 km deep · 2 km away
  26. 2.025 km SE of Covelo, California · 15463 days ago · 4 km deep · 90 km away
  27. 1.96 km E of Hidden Valley Lake, California · 15462 days ago · 7 km deep · 28 km away
  28. 1.85 km WSW of Cobb, California · 15462 days ago · 1 km deep · 4 km away
  29. 1.66 km W of Cobb, California · 15462 days ago · 3 km deep · 2 km away
  30. 1.84 km WSW of Cobb, California · 15462 days ago · 1 km deep · 4 km away
  31. 1.77 km W of Cobb, California · 15462 days ago · 3 km deep · 2 km away
  32. 1.619 km ENE of Clearlake, California · 15461 days ago · 5 km deep · 40 km away
  33. 1.92 km SSW of Dixon, California · 15461 days ago · 23 km deep · 96 km away
  34. 2.713 km N of Upper Lake, California · 15461 days ago · 0 km deep · 51 km away
  35. 1.66 km W of Cobb, California · 15461 days ago · 3 km deep · 2 km away
  36. 1.812 km NE of Comptche, California · 15460 days ago · -1 km deep · 80 km away
  37. 3.08 km SSW of Suisun, California · 15460 days ago · 5 km deep · 98 km away
  38. 2.29 km SSW of Suisun, California · 15460 days ago · 5 km deep · 97 km away
  39. 1.67 km WSW of Cobb, California · 15460 days ago · 2 km deep · 4 km away
  40. 2.33 km WNW of Soda Bay, California · 15460 days ago · 5 km deep · 21 km away
  41. 1.84 km NW of Soda Bay, California · 15460 days ago · 5 km deep · 21 km away
  42. 1.57 km W of Cobb, California · 15457 days ago · 3 km deep · 1 km away
  43. 1.63 km WNW of Cobb, California · 15456 days ago · -1 km deep · 4 km away
  44. 1.65 km WSW of Cobb, California · 15456 days ago · 1 km deep · 3 km away
  45. 1.511 km SSW of Kelseyville, California · 15456 days ago · 19 km deep · 8 km away
  46. 1.93 km WNW of Clearlake Oaks, California · 15455 days ago · 19 km deep · 25 km away
  47. 1.629 km SE of Covelo, California · 15455 days ago · 7 km deep · 88 km away
  48. 2.06 km W of Cobb, California · 15455 days ago · 3 km deep · 1 km away
  49. 1.87 km W of Cobb, California · 15455 days ago · 1 km deep · 1 km away
  50. 2.37 km WSW of Cobb, California · 15455 days ago · 0 km deep · 4 km away
  51. 1.67 km WSW of Cobb, California · 15453 days ago · 3 km deep · 4 km away
  52. 1.77 km W of Cobb, California · 15453 days ago · 3 km deep · 2 km away
  53. 1.723 km NNE of Potter Valley, California · 15453 days ago · 9 km deep · 78 km away
  54. 2.2Northern California · 15453 days ago · 1 km deep · 3 km away
  55. 1.8Northern California · 15453 days ago · -1 km deep · 28 km away
  56. 2.07 km W of Cobb, California · 15453 days ago · 3 km deep · 1 km away
  57. 3.26 km W of Cobb, California · 15452 days ago · 2 km deep · 1 km away
  58. 1.96 km W of Cobb, California · 15452 days ago · 3 km deep · 1 km away
  59. 1.74 km SE of Clear Lake Riviera, California · 15452 days ago · 2 km deep · 15 km away
  60. 1.68 km WSW of Cobb, California · 15452 days ago · 3 km deep · 4 km away

The first 60 of 171.

Before

  1. 2.56 km W of Cobb, California · 15468 days ago · 0 km deep · 1 km away
  2. 1.56 km W of Cobb, California · 15468 days ago · 0 km deep · 1 km away
  3. 1.88 km E of Lower Lake, California · 15468 days ago · 3 km deep · 26 km away
  4. 2.621 km NE of Potter Valley, California · 15469 days ago · 5 km deep · 71 km away
  5. 1.67 km SSW of Willits, California · 15469 days ago · 1 km deep · 77 km away
  6. 1.66 km NE of Lower Lake, California · 15469 days ago · 1 km deep · 25 km away
  7. 1.610 km N of Comptche, California · 15469 days ago · 5 km deep · 89 km away
  8. 1.77 km W of Cobb, California · 15470 days ago · 3 km deep · 2 km away
  9. 2.38 km WSW of Cobb, California · 15470 days ago · 2 km deep · 4 km away
  10. 1.98 km WSW of Cobb, California · 15470 days ago · 3 km deep · 4 km away
  11. 1.8Northern California · 15470 days ago · 3 km deep · 4 km away
  12. 1.56 km WSW of Cobb, California · 15470 days ago · 1 km deep · 3 km away
  13. 2.07 km W of Cobb, California · 15471 days ago · 1 km deep · 1 km away
  14. 2.37 km W of Cobb, California · 15471 days ago · 2 km deep · 2 km away
  15. 2.47 km WSW of Cobb, California · 15472 days ago · -1 km deep · 3 km away
  16. 1.55 km N of Windsor, California · 15472 days ago · 7 km deep · 26 km away
  17. 2.112 km S of Comptche, California · 15472 days ago · 0 km deep · 77 km away
  18. 1.712 km S of Comptche, California · 15472 days ago · 3 km deep · 78 km away
  19. 2.47 km WSW of Cobb, California · 15473 days ago · 1 km deep · 3 km away
  20. 1.75 km ESE of Healdsburg, California · 15473 days ago · 4 km deep · 26 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc19643. Read Thu, Oct 1, 2026, 6:46 PM UTC.