California earthquakes

M1.9 earthquake 10 km W of Biggs, California

A magnitude 1.9 earthquake struck 10 km W of Biggs, California on Mon, Nov 10, 1986, 12:37 AM PST (08:37 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.3 8 km E of Hidden Valley Lake, California. This one was a foreshock.

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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, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1986-11-10 08:37:43 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
39.411° N, 121.837° 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 1.8 km horizontally, 17.1 km in depth
Depth from
From location
Station coverage gap
131°
Stations used
5

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 73 in the 60 days after this one and 15 in the 30 days before it.

After

  1. 1.52 km NE of Hidden Valley Lake, California · 14569 days ago · 4 km deep · 89 km away
  2. 2.16 km SSW of Clear Lake Riviera, California · 14568 days ago · 1 km deep · 97 km away
  3. 1.99 km ESE of Hidden Valley Lake, California · 14567 days ago · 6 km deep · 89 km away
  4. 1.85 km E of Hidden Valley Lake, California · 14564 days ago · 11 km deep · 88 km away
  5. 2.311 km ESE of Hidden Valley Lake, California · 14564 days ago · 11 km deep · 86 km away
  6. 2.712 km E of Hidden Valley Lake, California · 14562 days ago · 13 km deep · 85 km away
  7. 1.911 km ESE of Hidden Valley Lake, California · 14562 days ago · 6 km deep · 89 km away
  8. 1.922 km NNE of Upper Lake, California · 14562 days ago · 0 km deep · 87 km away
  9. 1.811 km E of Hidden Valley Lake, California · 14560 days ago · 11 km deep · 86 km away
  10. 1.510 km ESE of Hidden Valley Lake, California · 14559 days ago · 7 km deep · 89 km away
  11. 1.69 km ESE of Hidden Valley Lake, California · 14556 days ago · 7 km deep · 88 km away
  12. 1.621 km ENE of Potter Valley, California · 14555 days ago · 5 km deep · 89 km away
  13. 1.94 km SW of Clearlake, California · 14554 days ago · 3 km deep · 89 km away
  14. 1.76 km SW of Lower Lake, California · 14554 days ago · -1 km deep · 93 km away
  15. 1.89 km NW of Elk Creek, California · 14553 days ago · 4 km deep · 73 km away
  16. 1.617 km N of Princeton, California · 14553 days ago · 4 km deep · 21 km away
  17. 1.93 km NW of Belden, California · 14553 days ago · 4 km deep · 83 km away
  18. 2.010 km ESE of Hidden Valley Lake, California · 14553 days ago · 7 km deep · 88 km away
  19. 1.610 km ESE of Hidden Valley Lake, California · 14549 days ago · 6 km deep · 88 km away
  20. 1.910 km ESE of Hidden Valley Lake, California · 14549 days ago · 6 km deep · 88 km away
  21. 2.28 km ENE of Los Molinos, California · 14545 days ago · 4 km deep · 73 km away
  22. 1.95 km NNE of Durham, California · 14544 days ago · 13 km deep · 31 km away
  23. 1.617 km ENE of Potter Valley, California · 14543 days ago · 10 km deep · 94 km away
  24. 1.920 km ENE of Potter Valley, California · 14542 days ago · -1 km deep · 90 km away
  25. 1.78 km ESE of Hidden Valley Lake, California · 14540 days ago · 8 km deep · 87 km away
  26. 1.79 km ESE of Hidden Valley Lake, California · 14540 days ago · 8 km deep · 87 km away
  27. 1.810 km ESE of Hidden Valley Lake, California · 14540 days ago · 9 km deep · 89 km away
  28. 2.79 km E of Hidden Valley Lake, California · 14539 days ago · 11 km deep · 87 km away
  29. 3.38 km E of Hidden Valley Lake, California · 14539 days ago · 9 km deep · 87 km away
  30. 3.38 km E of Hidden Valley Lake, California · 14539 days ago · 9 km deep · 87 km away
  31. 2.98 km E of Hidden Valley Lake, California · 14539 days ago · 7 km deep · 87 km away
  32. 2.58 km ESE of Hidden Valley Lake, California · 14539 days ago · 7 km deep · 87 km away
  33. 1.99 km ESE of Hidden Valley Lake, California · 14539 days ago · 7 km deep · 88 km away
  34. 1.89 km ESE of Hidden Valley Lake, California · 14539 days ago · 7 km deep · 88 km away
  35. 1.57 km E of Hidden Valley Lake, California · 14539 days ago · 8 km deep · 88 km away
  36. 2.29 km ESE of Hidden Valley Lake, California · 14539 days ago · 8 km deep · 88 km away
  37. 1.78 km E of Hidden Valley Lake, California · 14539 days ago · 8 km deep · 87 km away
  38. 1.58 km E of Hidden Valley Lake, California · 14539 days ago · 7 km deep · 87 km away
  39. 2.98 km E of Hidden Valley Lake, California · 14539 days ago · 9 km deep · 87 km away
  40. 1.88 km ESE of Hidden Valley Lake, California · 14539 days ago · 7 km deep · 88 km away
  41. 1.88 km ESE of Hidden Valley Lake, California · 14539 days ago · 7 km deep · 88 km away
  42. 1.88 km E of Hidden Valley Lake, California · 14539 days ago · 6 km deep · 87 km away
  43. 2.67 km E of Hidden Valley Lake, California · 14539 days ago · 7 km deep · 87 km away
  44. 2.18 km E of Hidden Valley Lake, California · 14539 days ago · 10 km deep · 86 km away
  45. 1.68 km ESE of Hidden Valley Lake, California · 14539 days ago · 7 km deep · 88 km away
  46. 1.89 km ESE of Hidden Valley Lake, California · 14538 days ago · 7 km deep · 88 km away
  47. 2.09 km ESE of Hidden Valley Lake, California · 14538 days ago · 7 km deep · 88 km away
  48. 1.88 km ESE of Hidden Valley Lake, California · 14538 days ago · 7 km deep · 88 km away
  49. 2.88 km E of Hidden Valley Lake, California · 14538 days ago · 11 km deep · 86 km away
  50. 1.810 km NNE of Angwin, California · 14538 days ago · 2 km deep · 96 km away
  51. 3.09 km ESE of Hidden Valley Lake, California · 14538 days ago · 8 km deep · 87 km away
  52. 2.57 km E of Hidden Valley Lake, California · 14538 days ago · 9 km deep · 87 km away
  53. 1.78 km ESE of Hidden Valley Lake, California · 14537 days ago · 7 km deep · 88 km away
  54. 1.88 km ESE of Hidden Valley Lake, California · 14537 days ago · 7 km deep · 88 km away
  55. 1.718 km ENE of Potter Valley, California · 14537 days ago · 5 km deep · 92 km away
  56. 1.98 km ESE of Hidden Valley Lake, California · 14536 days ago · 7 km deep · 88 km away
  57. 1.98 km ESE of Hidden Valley Lake, California · 14536 days ago · 7 km deep · 88 km away
  58. 1.88 km ESE of Hidden Valley Lake, California · 14534 days ago · 6 km deep · 89 km away
  59. 1.57 km E of Hidden Valley Lake, California · 14533 days ago · 8 km deep · 87 km away
  60. 1.614 km ESE of Hidden Valley Lake, California · 14532 days ago · 1 km deep · 88 km away

The first 60 of 73.

Before

  1. 3.26 km NE of Linda, California · 14574 days ago · 18 km deep · 39 km away
  2. 2.110 km E of Hidden Valley Lake, California · 14578 days ago · 2 km deep · 85 km away
  3. 2.121 km NE of Potter Valley, California · 14580 days ago · 10 km deep · 95 km away
  4. 1.64 km WSW of Clear Lake Riviera, California · 14580 days ago · 0 km deep · 96 km away
  5. 1.82 km ENE of Belden, California · 14582 days ago · 6 km deep · 86 km away
  6. 2.12 km SW of Sheridan, California · 14582 days ago · 5 km deep · 62 km away
  7. 3.03 km WSW of Palermo, California · 14582 days ago · 5 km deep · 23 km away
  8. 1.714 km E of Angwin, California · 14586 days ago · 5 km deep · 99 km away
  9. 2.07 km ENE of Clearlake, California · 14588 days ago · 13 km deep · 77 km away
  10. 2.015 km N of Princeton, California · 14591 days ago · 22 km deep · 21 km away
  11. 1.98 km E of Lower Lake, California · 14594 days ago · 1 km deep · 80 km away
  12. 2.218 km NNE of Upper Lake, California · 14596 days ago · 7 km deep · 83 km away
  13. 1.818 km NNE of Upper Lake, California · 14596 days ago · 0 km deep · 85 km away
  14. 1.810 km ENE of Hidden Valley Lake, California · 14597 days ago · 5 km deep · 82 km away
  15. 1.57 km SSW of Clear Lake Riviera, California · 14603 days ago · 4 km deep · 97 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1145171. Read Mon, Oct 5, 2026, 9:38 AM UTC.