California earthquakes

M2.1 earthquake 19 km ENE of Brooktrails, California

A magnitude 2.1 earthquake struck 19 km ENE of Brooktrails, California on Tue, Oct 21, 1986, 2:55 AM PDT (09:55 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M4.1 4 km SSE of Benbow, 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
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1986-10-21 09:55:07 UTC
Depth
4.1 km (2.6 mi), shallow
Epicenter
39.532° N, 123.185° 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 2.5 km horizontally, 8.8 km in depth
Magnitude uncertainty
±0.33
Depth from
From location
Station coverage gap
160°
Stations used
4

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 126 in the 60 days after this one and 77 in the 30 days before it.

After

  1. 2.19 km WSW of Cobb, California · 14592 days ago · -1 km deep · 89 km away
  2. 2.26 km WSW of Cobb, California · 14591 days ago · 3 km deep · 87 km away
  3. 1.7Northern California · 14589 days ago · 1 km deep · 87 km away
  4. 1.63 km NNE of Garberville, California · 14589 days ago · 13 km deep · 83 km away
  5. 1.85 km W of Cobb, California · 14589 days ago · 2 km deep · 86 km away
  6. 1.97 km WSW of Cobb, California · 14588 days ago · 1 km deep · 87 km away
  7. 1.67 km WSW of Cobb, California · 14588 days ago · 2 km deep · 87 km away
  8. 1.65 km WSW of Cobb, California · 14587 days ago · 0 km deep · 89 km away
  9. 2.07 km ENE of Clearlake, California · 14586 days ago · 13 km deep · 83 km away
  10. 3.15 km W of Cobb, California · 14584 days ago · 1 km deep · 86 km away
  11. 1.718 km S of Covelo, California · 14584 days ago · 4 km deep · 11 km away
  12. 2.27 km WSW of Cobb, California · 14583 days ago · 0 km deep · 87 km away
  13. 1.62 km WNW of Sea Ranch, California · 14583 days ago · 3 km deep · 94 km away
  14. 1.67 km W of Cobb, California · 14582 days ago · 6 km deep · 86 km away
  15. 1.54 km WNW of Cobb, California · 14581 days ago · -1 km deep · 85 km away
  16. 3.02 km SW of Cobb, California · 14581 days ago · 2 km deep · 90 km away
  17. 1.64 km WSW of Cobb, California · 14581 days ago · 2 km deep · 88 km away
  18. 2.08 km NNE of Brooktrails, California · 14581 days ago · 19 km deep · 15 km away
  19. 2.110 km NNW of Redwood Valley, California · 14580 days ago · 4 km deep · 19 km away
  20. 1.74 km WSW of Cobb, California · 14579 days ago · 0 km deep · 88 km away
  21. 2.06 km NW of Cobb, California · 14579 days ago · -1 km deep · 82 km away
  22. 1.911 km ESE of Leggett, California · 14579 days ago · 5 km deep · 48 km away
  23. 1.64 km WSW of Clear Lake Riviera, California · 14578 days ago · 0 km deep · 75 km away
  24. 1.68 km W of Cobb, California · 14578 days ago · 1 km deep · 84 km away
  25. 2.121 km NE of Potter Valley, California · 14577 days ago · 10 km deep · 22 km away
  26. 2.16 km WSW of Cobb, California · 14577 days ago · 4 km deep · 88 km away
  27. 1.97 km WSW of Cobb, California · 14577 days ago · 1 km deep · 88 km away
  28. 1.75 km WSW of Cobb, California · 14577 days ago · 0 km deep · 89 km away
  29. 1.79 km W of Cobb, California · 14577 days ago · 1 km deep · 85 km away
  30. 4.14 km SSE of Benbow, California · 14576 days ago · 37 km deep · 74 km away
  31. 2.116 km ENE of Covelo, California · 14576 days ago · 4 km deep · 35 km away
  32. 1.68 km SW of Hopland, California · 14576 days ago · 4 km deep · 69 km away
  33. 2.17 km W of Cobb, California · 14575 days ago · 3 km deep · 86 km away
  34. 2.310 km N of Cloverdale, California · 14575 days ago · 22 km deep · 72 km away
  35. 2.15 km NE of Laytonville, California · 14574 days ago · 16 km deep · 31 km away
  36. 2.19 km W of Cobb, California · 14574 days ago · -1 km deep · 86 km away
  37. 1.66 km W of Cobb, California · 14574 days ago · 2 km deep · 86 km away
  38. 2.67 km W of Cobb, California · 14573 days ago · 3 km deep · 86 km away
  39. 1.94 km W of Cobb, California · 14572 days ago · 0 km deep · 87 km away
  40. 2.811 km S of Kelseyville, California · 14572 days ago · 2 km deep · 78 km away
  41. 2.46 km WSW of Cobb, California · 14572 days ago · 1 km deep · 88 km away
  42. 2.218 km W of Cloverdale, California · 14572 days ago · 5 km deep · 84 km away
  43. 1.75 km SW of Cobb, California · 14572 days ago · 0 km deep · 90 km away
  44. 2.85 km SW of Cobb, California · 14572 days ago · 0 km deep · 89 km away
  45. 3.75 km SW of Cobb, California · 14572 days ago · 0 km deep · 90 km away
  46. 1.85 km WSW of Cobb, California · 14572 days ago · 0 km deep · 89 km away
  47. 1.65 km WSW of Cobb, California · 14571 days ago · 1 km deep · 89 km away
  48. 1.610 km W of Ukiah, California · 14571 days ago · 4 km deep · 46 km away
  49. 1.54 km WNW of Cobb, California · 14571 days ago · 2 km deep · 85 km away
  50. 1.75 km WSW of Cobb, California · 14571 days ago · 2 km deep · 88 km away
  51. 1.95 km WSW of Cobb, California · 14570 days ago · 4 km deep · 88 km away
  52. 1.66 km W of Cobb, California · 14570 days ago · 1 km deep · 85 km away
  53. 2.16 km W of Cobb, California · 14570 days ago · 2 km deep · 86 km away
  54. 2.06 km W of Cobb, California · 14570 days ago · 3 km deep · 85 km away
  55. 3.010 km W of Cobb, California · 14567 days ago · 0 km deep · 86 km away
  56. 2.87 km W of Cobb, California · 14567 days ago · 1 km deep · 84 km away
  57. 1.52 km NE of Hidden Valley Lake, California · 14567 days ago · 4 km deep · 97 km away
  58. 2.57 km W of Cobb, California · 14566 days ago · -1 km deep · 87 km away
  59. 2.16 km SSW of Clear Lake Riviera, California · 14566 days ago · 1 km deep · 80 km away
  60. 3.06 km W of Cobb, California · 14563 days ago · 4 km deep · 86 km away

The first 60 of 126.

Before

  1. 1.98 km E of Lower Lake, California · 14592 days ago · 1 km deep · 89 km away
  2. 2.35 km SW of Cobb, California · 14592 days ago · 1 km deep · 91 km away
  3. 1.86 km W of Cobb, California · 14593 days ago · 3 km deep · 86 km away
  4. 1.99 km WSW of Cobb, California · 14593 days ago · 1 km deep · 87 km away
  5. 2.67 km NNE of Hopland, California · 14593 days ago · 2 km deep · 56 km away
  6. 1.96 km W of Cobb, California · 14594 days ago · 3 km deep · 86 km away
  7. 2.86 km W of Cobb, California · 14594 days ago · 4 km deep · 86 km away
  8. 1.611 km N of Cloverdale, California · 14594 days ago · 1 km deep · 71 km away
  9. 1.61 km WSW of Kelseyville, California · 14594 days ago · 3 km deep · 68 km away
  10. 2.218 km NNE of Upper Lake, California · 14594 days ago · 7 km deep · 42 km away
  11. 1.818 km NNE of Upper Lake, California · 14594 days ago · 0 km deep · 40 km away
  12. 2.67 km W of Cobb, California · 14594 days ago · 4 km deep · 85 km away
  13. 1.98 km NNE of Geyserville, California · 14594 days ago · 13 km deep · 89 km away
  14. 1.810 km ENE of Hidden Valley Lake, California · 14595 days ago · 5 km deep · 98 km away
  15. 1.63 km W of Geyserville, California · 14595 days ago · 2 km deep · 94 km away
  16. 1.75 km ESE of Fort Bragg, California · 14596 days ago · 2 km deep · 49 km away
  17. 2.22 km SSE of Covelo, California · 14597 days ago · 4 km deep · 27 km away
  18. 2.05 km WSW of Cobb, California · 14597 days ago · -1 km deep · 89 km away
  19. 1.77 km W of Cobb, California · 14599 days ago · 3 km deep · 86 km away
  20. 2.528 km ENE of Covelo, California · 14600 days ago · 6 km deep · 45 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1144700. Read Sat, Oct 3, 2026, 6:30 AM UTC.