California earthquakes

M1.8 earthquake 7 km ENE of Brooktrails, California

A magnitude 1.8 earthquake struck 7 km ENE of Brooktrails, California on Wed, Aug 24, 1983, 4:37 PM PDT (23:37 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.5 9 km W of Cobb, California. This one was a foreshock.

Brooktrails 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
1.8 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-08-24 23:37:01 UTC
Depth
7.7 km (4.8 mi), shallow
Epicenter
39.471° N, 123.303° 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 0.4 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
134°
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 80 in the 30 days before it.

After

  1. 2.07 km W of Cobb, California · 15743 days ago · 3 km deep · 85 km away
  2. 1.612 km N of Shelter Cove, California · 15743 days ago · 22 km deep · 99 km away
  3. 3.07 km WSW of Cobb, California · 15743 days ago · 1 km deep · 86 km away
  4. 1.76 km S of Cobb, California · 15743 days ago · 0 km deep · 93 km away
  5. 1.76 km ESE of Calpella, California · 15743 days ago · -1 km deep · 32 km away
  6. 1.66 km W of Cobb, California · 15743 days ago · 2 km deep · 85 km away
  7. 1.64 km S of Cobb, California · 15743 days ago · 0 km deep · 92 km away
  8. 2.37 km WSW of Cobb, California · 15743 days ago · 0 km deep · 86 km away
  9. 1.87 km W of Cobb, California · 15743 days ago · 3 km deep · 84 km away
  10. 1.512 km N of Shelter Cove, California · 15742 days ago · 17 km deep · 98 km away
  11. 1.911 km S of Laytonville, California · 15742 days ago · 2 km deep · 19 km away
  12. 1.65 km SSW of Cobb, California · 15742 days ago · 0 km deep · 90 km away
  13. 1.711 km S of Laytonville, California · 15742 days ago · 1 km deep · 19 km away
  14. 1.66 km WSW of Cobb, California · 15741 days ago · 1 km deep · 86 km away
  15. 1.66 km W of Cobb, California · 15740 days ago · 1 km deep · 86 km away
  16. 2.94 km ENE of Hopland, California · 15740 days ago · 6 km deep · 58 km away
  17. 1.96 km WSW of Cobb, California · 15740 days ago · 0 km deep · 86 km away
  18. 1.84 km S of Cobb, California · 15739 days ago · 1 km deep · 91 km away
  19. 1.74 km S of Cobb, California · 15739 days ago · 1 km deep · 91 km away
  20. 1.73 km S of Cobb, California · 15739 days ago · 0 km deep · 91 km away
  21. 1.54 km S of Cobb, California · 15738 days ago · 1 km deep · 92 km away
  22. 1.55 km SSW of Cobb, California · 15738 days ago · 0 km deep · 90 km away
  23. 2.25 km E of Lower Lake, California · 15738 days ago · 5 km deep · 90 km away
  24. 1.92 km ENE of Calpella, California · 15738 days ago · 8 km deep · 28 km away
  25. 2.17 km W of Cobb, California · 15738 days ago · 3 km deep · 84 km away
  26. 1.75 km SSE of Laytonville, California · 15737 days ago · 2 km deep · 23 km away
  27. 2.012 km WSW of Hopland, California · 15737 days ago · 0 km deep · 61 km away
  28. 1.69 km WSW of Cobb, California · 15737 days ago · 2 km deep · 85 km away
  29. 1.65 km SSW of Cobb, California · 15737 days ago · -1 km deep · 91 km away
  30. 1.69 km SW of Clear Lake Riviera, California · 15736 days ago · 9 km deep · 78 km away
  31. 1.610 km SSW of Comptche, California · 15736 days ago · 3 km deep · 42 km away
  32. 1.88 km W of Cobb, California · 15736 days ago · 0 km deep · 84 km away
  33. 1.57 km W of Cobb, California · 15735 days ago · 3 km deep · 84 km away
  34. 2.01 km ENE of Middletown, California · 15735 days ago · 55 km deep · 100 km away
  35. 1.64 km W of Laytonville, California · 15735 days ago · -1 km deep · 32 km away
  36. 1.58 km WSW of Cobb, California · 15735 days ago · 1 km deep · 85 km away
  37. 1.56 km W of Cobb, California · 15734 days ago · 3 km deep · 85 km away
  38. 1.56 km W of Cobb, California · 15734 days ago · 3 km deep · 84 km away
  39. 2.16 km W of Cobb, California · 15733 days ago · 3 km deep · 85 km away
  40. 1.78 km W of Cobb, California · 15733 days ago · 0 km deep · 84 km away
  41. 1.65 km SW of Cobb, California · 15732 days ago · 0 km deep · 88 km away
  42. 1.75 km SW of Cobb, California · 15732 days ago · 0 km deep · 88 km away
  43. 1.710 km NNE of Cloverdale, California · 15732 days ago · 12 km deep · 69 km away
  44. 1.78 km WSW of Cobb, California · 15732 days ago · 3 km deep · 86 km away
  45. 2.69 km WSW of Cobb, California · 15732 days ago · 1 km deep · 85 km away
  46. 1.67 km SSE of Cobb, California · 15732 days ago · -1 km deep · 95 km away
  47. 1.98 km WSW of Cobb, California · 15731 days ago · 1 km deep · 85 km away
  48. 2.66 km W of Cobb, California · 15731 days ago · 3 km deep · 84 km away
  49. 1.87 km W of Cobb, California · 15729 days ago · 0 km deep · 83 km away
  50. 1.76 km W of Cobb, California · 15729 days ago · 3 km deep · 84 km away
  51. 2.06 km W of Cobb, California · 15729 days ago · 3 km deep · 84 km away
  52. 2.18 km WSW of Cobb, California · 15728 days ago · -1 km deep · 85 km away
  53. 2.35 km SW of Cobb, California · 15728 days ago · 0 km deep · 88 km away
  54. 3.14 km NE of Miranda, California · 15727 days ago · 27 km deep · 97 km away
  55. 1.58 km NNW of Redwood Valley, California · 15726 days ago · 8 km deep · 16 km away
  56. 1.86 km S of Cobb, California · 15726 days ago · 0 km deep · 93 km away
  57. 1.615 km ESE of Comptche, California · 15726 days ago · -1 km deep · 28 km away
  58. 2.716 km N of Laytonville, California · 15725 days ago · 4 km deep · 43 km away
  59. 1.516 km N of Laytonville, California · 15725 days ago · 6 km deep · 43 km away
  60. 2.415 km N of Laytonville, California · 15725 days ago · 5 km deep · 43 km away

The first 60 of at least 200.

Before

  1. 1.626 km N of Potter Valley, California · 15744 days ago · -1 km deep · 21 km away
  2. 1.95 km NNW of Redway, California · 15744 days ago · 20 km deep · 90 km away
  3. 3.016 km SE of Ruth, California · 15744 days ago · 36 km deep · 76 km away
  4. 1.710 km SSE of Laytonville, California · 15745 days ago · 5 km deep · 18 km away
  5. 1.57 km WSW of Cobb, California · 15745 days ago · 2 km deep · 86 km away
  6. 1.69 km WSW of Cobb, California · 15745 days ago · 1 km deep · 86 km away
  7. 1.7Northern California · 15745 days ago · -1 km deep · 86 km away
  8. 1.67 km WSW of Cobb, California · 15745 days ago · -1 km deep · 87 km away
  9. 2.16 km WSW of Cobb, California · 15745 days ago · -1 km deep · 86 km away
  10. 3.16 km WSW of Cobb, California · 15745 days ago · 1 km deep · 86 km away
  11. 1.89 km W of Redwood Valley, California · 15746 days ago · 6 km deep · 21 km away
  12. 1.712 km SSE of Laytonville, California · 15746 days ago · 8 km deep · 16 km away
  13. 1.65 km W of Cobb, California · 15746 days ago · 0 km deep · 85 km away
  14. 1.77 km W of Cobb, California · 15747 days ago · 3 km deep · 84 km away
  15. 1.68 km WSW of Cobb, California · 15747 days ago · 2 km deep · 85 km away
  16. 3.07 km W of Cobb, California · 15748 days ago · 3 km deep · 84 km away
  17. 1.86 km E of Fort Bragg, California · 15748 days ago · 7 km deep · 37 km away
  18. 2.29 km WSW of Cobb, California · 15749 days ago · 2 km deep · 85 km away
  19. 2.310 km NW of Ruth, California · 15749 days ago · 21 km deep · 97 km away
  20. 1.98 km WSW of Cobb, California · 15749 days ago · 3 km deep · 86 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1101068. Read Thu, Oct 1, 2026, 11:34 PM UTC.