California earthquakes

M2.5 earthquake 13 km WNW of Brooktrails, California

A magnitude 2.5 earthquake struck 13 km WNW of Brooktrails, California on Mon, Oct 30, 1978, 1:11 PM PST (21:11 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M2.6 10 km NNW of Potter Valley, 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.

Open the live map with earthquakes

The earthquake

Magnitude
2.5 (md), micro
Local time
UTC
1978-10-30 21:11:33 UTC
Depth
12.4 km (7.7 mi), shallow
Epicenter
39.483° N, 123.538° 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 6.5 km horizontally, 1.0 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
295°, poorly surrounded by stations
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: 79 in the 60 days after this one and 28 in the 30 days before it.

After

  1. 1.73 km SE of Calpella, California · 17491 days ago · 2 km deep · 43 km away
  2. 2.16 km W of Cobb, California · 17491 days ago · 2 km deep · 97 km away
  3. 2.411 km NNW of Potter Valley, California · 17487 days ago · 4 km deep · 35 km away
  4. 2.610 km NNW of Potter Valley, California · 17487 days ago · 3 km deep · 35 km away
  5. 1.89 km E of Willits, California · 17486 days ago · 8 km deep · 27 km away
  6. 1.54 km WSW of Weott, California · 17486 days ago · 25 km deep · 99 km away
  7. 2.326 km NE of Potter Valley, California · 17486 days ago · 14 km deep · 52 km away
  8. 1.57 km WSW of Cobb, California · 17486 days ago · 1 km deep · 99 km away
  9. 2.34 km SW of Clearlake, California · 17484 days ago · 2 km deep · 98 km away
  10. 2.14 km SW of Clearlake, California · 17484 days ago · 0 km deep · 98 km away
  11. 2.38 km WSW of Cobb, California · 17483 days ago · 4 km deep · 98 km away
  12. 1.77 km W of Cobb, California · 17483 days ago · 4 km deep · 98 km away
  13. 1.66 km W of Cobb, California · 17483 days ago · 3 km deep · 97 km away
  14. 3.824 km NE of Potter Valley, California · 17481 days ago · 18 km deep · 50 km away
  15. 2.119 km NE of Potter Valley, California · 17481 days ago · 4 km deep · 48 km away
  16. 2.024 km NE of Potter Valley, California · 17481 days ago · 11 km deep · 52 km away
  17. 1.827 km NE of Potter Valley, California · 17481 days ago · 15 km deep · 53 km away
  18. 2.425 km NE of Potter Valley, California · 17481 days ago · 13 km deep · 51 km away
  19. 1.725 km NE of Potter Valley, California · 17481 days ago · 13 km deep · 52 km away
  20. 1.65 km W of Cobb, California · 17480 days ago · 1 km deep · 98 km away
  21. 1.813 km NE of Phillipsville, California · 17480 days ago · 25 km deep · 92 km away
  22. 1.66 km W of Cobb, California · 17479 days ago · 3 km deep · 97 km away
  23. 2.46 km WSW of Cobb, California · 17474 days ago · 3 km deep · 98 km away
  24. 1.82 km SE of Calpella, California · 17473 days ago · 2 km deep · 43 km away
  25. 1.83 km SE of Calpella, California · 17473 days ago · 3 km deep · 43 km away
  26. 1.610 km W of Cobb, California · 17472 days ago · 0 km deep · 95 km away
  27. 2.03 km SSW of Benbow, California · 17471 days ago · 0 km deep · 66 km away
  28. 2.19 km SE of Willits, California · 17471 days ago · 9 km deep · 27 km away
  29. 3.37 km NNW of Redwood Valley, California · 17471 days ago · 13 km deep · 31 km away
  30. 1.57 km WSW of Cobb, California · 17471 days ago · 4 km deep · 98 km away
  31. 1.56 km W of Cobb, California · 17470 days ago · 4 km deep · 98 km away
  32. 1.98 km W of Cobb, California · 17469 days ago · 1 km deep · 97 km away
  33. 2.28 km W of Cobb, California · 17469 days ago · 0 km deep · 97 km away
  34. 1.68 km W of Cobb, California · 17469 days ago · 0 km deep · 97 km away
  35. 1.810 km SE of Willits, California · 17467 days ago · 10 km deep · 28 km away
  36. 2.0near the coast of Northern California · 17467 days ago · 4 km deep · 44 km away
  37. 1.78 km W of Cobb, California · 17466 days ago · 1 km deep · 97 km away
  38. 2.17 km W of Cobb, California · 17465 days ago · 1 km deep · 97 km away
  39. 1.83 km N of Redway, California · 17465 days ago · 18 km deep · 79 km away
  40. 2.610 km NNE of Brooktrails, California · 17463 days ago · 8 km deep · 18 km away
  41. 1.84 km ESE of Leggett, California · 17462 days ago · 3 km deep · 42 km away
  42. 1.96 km ESE of Hopland, California · 17462 days ago · 4 km deep · 73 km away
  43. 1.817 km NE of Miranda, California · 17462 days ago · 24 km deep · 96 km away
  44. 1.817 km ENE of Potter Valley, California · 17462 days ago · 5 km deep · 55 km away
  45. 2.26 km W of Cobb, California · 17461 days ago · 3 km deep · 98 km away
  46. 1.74 km WNW of Redwood Valley, California · 17460 days ago · 7 km deep · 33 km away
  47. 2.211 km SSW of Ruth, California · 17459 days ago · 30 km deep · 78 km away
  48. 1.76 km WSW of Cobb, California · 17459 days ago · 0 km deep · 98 km away
  49. 2.57 km W of Cobb, California · 17459 days ago · 3 km deep · 97 km away
  50. 2.57 km W of Cobb, California · 17459 days ago · 3 km deep · 97 km away
  51. 1.69 km W of Cobb, California · 17459 days ago · 0 km deep · 96 km away
  52. 2.39 km WSW of Cobb, California · 17458 days ago · 1 km deep · 97 km away
  53. 1.76 km NE of Myers Flat, California · 17457 days ago · 1 km deep · 95 km away
  54. 1.56 km W of Cobb, California · 17456 days ago · 3 km deep · 97 km away
  55. 1.811 km ESE of Willits, California · 17455 days ago · 4 km deep · 29 km away
  56. 1.96 km W of Cobb, California · 17455 days ago · 0 km deep · 97 km away
  57. 3.46 km WSW of Cobb, California · 17454 days ago · 0 km deep · 99 km away
  58. 1.77 km W of Cobb, California · 17454 days ago · -1 km deep · 96 km away
  59. 1.810 km SE of Hopland, California · 17451 days ago · 2 km deep · 77 km away
  60. 3.26 km W of Cobb, California · 17449 days ago · 4 km deep · 98 km away

The first 60 of 79.

Before

  1. 2.711 km ENE of Cleone, California · 17494 days ago · 12 km deep · 11 km away
  2. 2.16 km NE of Willits, California · 17496 days ago · 5 km deep · 21 km away
  3. 2.16 km WSW of Cobb, California · 17497 days ago · 0 km deep · 99 km away
  4. 2.08 km E of Willits, California · 17497 days ago · 10 km deep · 25 km away
  5. 2.512 km N of Brooktrails, California · 17500 days ago · -1 km deep · 16 km away
  6. 1.87 km W of Cobb, California · 17502 days ago · 3 km deep · 97 km away
  7. 2.17 km WSW of Cobb, California · 17503 days ago · 0 km deep · 98 km away
  8. 1.5Northern California · 17503 days ago · 4 km deep · 98 km away
  9. 2.36 km W of Cobb, California · 17503 days ago · 4 km deep · 97 km away
  10. 2.112 km S of Ruth, California · 17504 days ago · 2 km deep · 77 km away
  11. 1.57 km SE of Boonville, California · 17504 days ago · 4 km deep · 61 km away
  12. 1.88 km W of Cobb, California · 17505 days ago · 1 km deep · 97 km away
  13. 1.98 km W of Cobb, California · 17505 days ago · 0 km deep · 97 km away
  14. 2.06 km ENE of Willits, California · 17506 days ago · 11 km deep · 22 km away
  15. 2.09 km ESE of Willits, California · 17506 days ago · 8 km deep · 27 km away
  16. 2.27 km W of Cobb, California · 17507 days ago · 0 km deep · 98 km away
  17. 1.77 km WSW of Cobb, California · 17508 days ago · 1 km deep · 98 km away
  18. 2.7Northern California · 17510 days ago · 4 km deep · 99 km away
  19. 2.29 km ESE of Willits, California · 17512 days ago · 8 km deep · 27 km away
  20. 1.79 km N of Ruth, California · 17512 days ago · 19 km deep · 99 km away

Earthquakes todayCalifornia earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1043095. Read Tue, Sep 22, 2026, 9:29 PM UTC.