California earthquakes

M1.5 earthquake 15 km N of Brooktrails, California

A magnitude 1.5 earthquake struck 15 km N of Brooktrails, California on Wed, Oct 26, 1983, 12:27 AM PDT (07:27 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.5 near the coast of Northern 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
1.5 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1983-10-26 07:27:40 UTC
Depth
0.3 km (0.2 mi), shallow
Epicenter
39.581° N, 123.368° 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, 8.6 km in depth
Magnitude uncertainty
±0.16
Depth from
From location
Station coverage gap
74°
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: 189 in the 60 days after this one and 91 in the 30 days before it.

After

  1. 1.715 km N of Brooktrails, California · 15683 days ago · -1 km deep · 1 km away
  2. 1.66 km W of Cobb, California · 15682 days ago · 0 km deep · 98 km away
  3. 1.74 km W of Cobb, California · 15682 days ago · 0 km deep · 99 km away
  4. 2.37 km WSW of Cobb, California · 15682 days ago · 1 km deep · 100 km away
  5. 1.76 km WSW of Cobb, California · 15682 days ago · 1 km deep · 99 km away
  6. 2.224 km NW of Paskenta, California · 15681 days ago · 0 km deep · 78 km away
  7. 3.115 km SE of Laytonville, California · 15681 days ago · 2 km deep · 0 km away
  8. 1.76 km WSW of Cobb, California · 15681 days ago · 3 km deep · 99 km away
  9. 1.515 km NNW of Potter Valley, California · 15681 days ago · 2 km deep · 23 km away
  10. 3.06 km W of Cobb, California · 15680 days ago · 0 km deep · 98 km away
  11. 2.214 km SE of Laytonville, California · 15679 days ago · -1 km deep · 1 km away
  12. 1.67 km WSW of Cobb, California · 15678 days ago · 1 km deep · 99 km away
  13. 2.38 km WSW of Cobb, California · 15678 days ago · 2 km deep · 99 km away
  14. 2.06 km W of Cobb, California · 15678 days ago · 3 km deep · 98 km away
  15. 2.37 km WSW of Cobb, California · 15677 days ago · 2 km deep · 99 km away
  16. 1.76 km WSW of Cobb, California · 15677 days ago · 2 km deep · 99 km away
  17. 1.623 km N of Potter Valley, California · 15677 days ago · -1 km deep · 24 km away
  18. 1.512 km NE of Comptche, California · 15677 days ago · 2 km deep · 29 km away
  19. 3.115 km N of Brooktrails, California · 15677 days ago · -1 km deep · 0 km away
  20. 2.015 km N of Brooktrails, California · 15677 days ago · -1 km deep · 1 km away
  21. 2.415 km SE of Laytonville, California · 15677 days ago · -1 km deep · 0 km away
  22. 1.815 km N of Brooktrails, California · 15677 days ago · -1 km deep · 0 km away
  23. 1.615 km SE of Laytonville, California · 15676 days ago · 1 km deep · 2 km away
  24. 1.93 km NNE of Redway, California · 15676 days ago · 21 km deep · 73 km away
  25. 1.59 km WSW of Hopland, California · 15676 days ago · 8 km deep · 73 km away
  26. 2.05 km WSW of Cobb, California · 15675 days ago · -1 km deep · 100 km away
  27. 1.9Northern California · 15675 days ago · 3 km deep · 98 km away
  28. 1.88 km ENE of Brooktrails, California · 15675 days ago · 9 km deep · 13 km away
  29. 2.1Northern California · 15675 days ago · 2 km deep · 97 km away
  30. 1.61 km SW of Hopland, California · 15675 days ago · 0 km deep · 72 km away
  31. 1.66 km WSW of Cobb, California · 15674 days ago · 3 km deep · 100 km away
  32. 1.83 km WNW of Hopland, California · 15674 days ago · 8 km deep · 69 km away
  33. 1.88 km WSW of Cobb, California · 15674 days ago · 3 km deep · 100 km away
  34. 1.54 km ESE of Clearlake Oaks, California · 15674 days ago · -1 km deep · 90 km away
  35. 3.5near the coast of Northern California · 15673 days ago · 2 km deep · 1 km away
  36. 1.67 km E of Willits, California · 15673 days ago · 8 km deep · 21 km away
  37. 1.63 km WNW of Hopland, California · 15672 days ago · 2 km deep · 69 km away
  38. 1.98 km WSW of Cobb, California · 15672 days ago · 1 km deep · 99 km away
  39. 1.610 km SSW of Hopland, California · 15672 days ago · -1 km deep · 80 km away
  40. 1.95 km W of Cobb, California · 15672 days ago · 0 km deep · 98 km away
  41. 1.613 km W of Cloverdale, California · 15672 days ago · 15 km deep · 90 km away
  42. 1.810 km E of Laytonville, California · 15671 days ago · 4 km deep · 14 km away
  43. 1.86 km W of Cobb, California · 15671 days ago · 3 km deep · 98 km away
  44. 1.86 km W of Cobb, California · 15670 days ago · 3 km deep · 98 km away
  45. 2.722 km SSE of Hayfork, California · 15670 days ago · 28 km deep · 92 km away
  46. 1.86 km W of Cobb, California · 15669 days ago · 3 km deep · 98 km away
  47. 1.57 km WSW of Cobb, California · 15669 days ago · -1 km deep · 99 km away
  48. 1.97 km W of Cobb, California · 15668 days ago · 1 km deep · 97 km away
  49. 3.116 km NE of Brooktrails, California · 15667 days ago · -1 km deep · 13 km away
  50. 1.87 km W of Cobb, California · 15667 days ago · 4 km deep · 98 km away
  51. 1.56 km W of Cobb, California · 15667 days ago · 2 km deep · 99 km away
  52. 1.7Northern California · 15667 days ago · -1 km deep · 98 km away
  53. 1.7Northern California · 15667 days ago · 1 km deep · 98 km away
  54. 2.111 km SE of Laytonville, California · 15666 days ago · 0 km deep · 4 km away
  55. 2.76 km N of Cobb, California · 15666 days ago · 1 km deep · 96 km away
  56. 1.96 km NNE of Cobb, California · 15666 days ago · 2 km deep · 97 km away
  57. 2.37 km WSW of Cobb, California · 15665 days ago · 3 km deep · 99 km away
  58. 2.64 km ENE of Garberville, California · 15665 days ago · 18 km deep · 68 km away
  59. 1.76 km W of Cobb, California · 15665 days ago · 3 km deep · 98 km away
  60. 2.56 km WSW of Cobb, California · 15665 days ago · 0 km deep · 99 km away

The first 60 of 189.

Before

  1. 1.815 km SE of Laytonville, California · 15683 days ago · -1 km deep · 0 km away
  2. 2.37 km NNE of Cobb, California · 15683 days ago · 2 km deep · 96 km away
  3. 2.717 km NNW of Paskenta, California · 15684 days ago · 9 km deep · 81 km away
  4. 1.66 km W of Cobb, California · 15684 days ago · 2 km deep · 98 km away
  5. 1.612 km N of Potter Valley, California · 15684 days ago · 8 km deep · 26 km away
  6. 2.720 km NNW of Paskenta, California · 15685 days ago · 4 km deep · 79 km away
  7. 1.68 km WSW of Cobb, California · 15685 days ago · 1 km deep · 99 km away
  8. 1.64 km W of Cobb, California · 15685 days ago · 0 km deep · 99 km away
  9. 1.68 km WSW of Cobb, California · 15685 days ago · 1 km deep · 99 km away
  10. 2.022 km NNE of Upper Lake, California · 15686 days ago · 8 km deep · 50 km away
  11. 2.510 km WSW of Hopland, California · 15686 days ago · 3 km deep · 73 km away
  12. 3.315 km SE of Laytonville, California · 15686 days ago · 3 km deep · 0 km away
  13. 1.86 km WSW of Cobb, California · 15687 days ago · 1 km deep · 99 km away
  14. 1.64 km ENE of Willits, California · 15687 days ago · 5 km deep · 17 km away
  15. 1.56 km E of Willits, California · 15687 days ago · 5 km deep · 21 km away
  16. 2.06 km W of Cobb, California · 15687 days ago · 2 km deep · 99 km away
  17. 1.96 km W of Cobb, California · 15687 days ago · 0 km deep · 99 km away
  18. 2.26 km W of Cobb, California · 15687 days ago · 1 km deep · 99 km away
  19. 1.97 km WSW of Cobb, California · 15687 days ago · 1 km deep · 99 km away
  20. 1.57 km W of Cobb, California · 15687 days ago · 0 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1105636. Read Sat, Oct 3, 2026, 1:30 PM UTC.