California earthquakes

M2.1 earthquake 10 km NNE of Brooktrails, California

A magnitude 2.1 earthquake struck 10 km NNE of Brooktrails, California on Sat, Mar 17, 1979, 11:06 AM PST (19:06 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.0 6 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
2.1 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1979-03-17 19:06:02 UTC
Depth
8.3 km (5.2 mi), shallow
Epicenter
39.525° N, 123.333° 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 1.1 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
260°, poorly surrounded by stations
Stations used
9

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 58 in the 60 days after this one and 27 in the 30 days before it.

After

  1. 2.17 km W of Cobb, California · 17368 days ago · 3 km deep · 91 km away
  2. 2.13 km ESE of Calpella, California · 17367 days ago · 6 km deep · 37 km away
  3. 2.16 km WSW of Cobb, California · 17366 days ago · 1 km deep · 92 km away
  4. 2.86 km W of Cobb, California · 17366 days ago · 3 km deep · 91 km away
  5. 2.314 km SE of Alderpoint, California · 17365 days ago · 12 km deep · 65 km away
  6. 1.99 km SSE of Hopland, California · 17363 days ago · 5 km deep · 74 km away
  7. 1.74 km WSW of Cobb, California · 17363 days ago · 1 km deep · 94 km away
  8. 1.96 km N of Cloverdale, California · 17363 days ago · 6 km deep · 78 km away
  9. 2.06 km N of Cloverdale, California · 17363 days ago · 5 km deep · 78 km away
  10. 2.04 km SE of Benbow, California · 17361 days ago · 16 km deep · 68 km away
  11. 1.65 km ESE of Clearlake Oaks, California · 17361 days ago · 2 km deep · 84 km away
  12. 2.16 km W of Cobb, California · 17360 days ago · 4 km deep · 91 km away
  13. 1.98 km NNE of Hopland, California · 17360 days ago · 2 km deep · 57 km away
  14. 1.88 km NNE of Hopland, California · 17360 days ago · 0 km deep · 57 km away
  15. 2.319 km NE of Upper Lake, California · 17360 days ago · 8 km deep · 53 km away
  16. 1.86 km ENE of Brooktrails, California · 17358 days ago · 4 km deep · 7 km away
  17. 1.58 km WSW of Cobb, California · 17356 days ago · 4 km deep · 92 km away
  18. 1.69 km E of Willits, California · 17356 days ago · 4 km deep · 16 km away
  19. 1.65 km ENE of Lucerne, California · 17355 days ago · 8 km deep · 69 km away
  20. 1.71 km W of Benbow, California · 17354 days ago · 19 km deep · 73 km away
  21. 1.53 km ESE of Calpella, California · 17352 days ago · 5 km deep · 37 km away
  22. 1.75 km NE of Nice, California · 17352 days ago · 9 km deep · 60 km away
  23. 2.13 km ESE of Calpella, California · 17352 days ago · 6 km deep · 36 km away
  24. 2.17 km SSE of Potter Valley, California · 17352 days ago · 41 km deep · 37 km away
  25. 1.53 km ESE of Calpella, California · 17352 days ago · 6 km deep · 36 km away
  26. 1.710 km NNW of Potter Valley, California · 17351 days ago · 4 km deep · 19 km away
  27. 1.912 km NNW of Potter Valley, California · 17351 days ago · 12 km deep · 17 km away
  28. 1.64 km SSE of Hopland, California · 17350 days ago · 7 km deep · 68 km away
  29. 2.03 km ESE of Talmage, California · 17350 days ago · 3 km deep · 48 km away
  30. 1.95 km WSW of Cobb, California · 17350 days ago · 0 km deep · 93 km away
  31. 1.55 km WSW of Cobb, California · 17350 days ago · 0 km deep · 93 km away
  32. 1.87 km ENE of Leggett, California · 17349 days ago · 8 km deep · 47 km away
  33. 1.68 km SSW of Benbow, California · 17349 days ago · 15 km deep · 68 km away
  34. 1.97 km NE of Phillipsville, California · 17346 days ago · -1 km deep · 88 km away
  35. 1.66 km NE of Phillipsville, California · 17346 days ago · -1 km deep · 88 km away
  36. 2.17 km ENE of Phillipsville, California · 17342 days ago · 24 km deep · 85 km away
  37. 1.66 km WSW of Cobb, California · 17341 days ago · 0 km deep · 92 km away
  38. 2.68 km WSW of Cobb, California · 17339 days ago · 4 km deep · 93 km away
  39. 1.58 km WSW of Cobb, California · 17339 days ago · 4 km deep · 93 km away
  40. 1.95 km ESE of Clearlake Oaks, California · 17338 days ago · 2 km deep · 84 km away
  41. 2.06 km WSW of Cobb, California · 17338 days ago · 4 km deep · 92 km away
  42. 1.718 km SW of Weott, California · 17338 days ago · 13 km deep · 99 km away
  43. 1.817 km SE of Alderpoint, California · 17335 days ago · 12 km deep · 62 km away
  44. 2.57 km WSW of Cobb, California · 17335 days ago · 3 km deep · 92 km away
  45. 1.910 km NNW of Potter Valley, California · 17332 days ago · 4 km deep · 19 km away
  46. 1.610 km SE of Boonville, California · 17330 days ago · 1 km deep · 66 km away
  47. 1.63 km N of Redway, California · 17328 days ago · 17 km deep · 81 km away
  48. 2.10 km N of Hopland, California · 17327 days ago · 7 km deep · 63 km away
  49. 2.46 km W of Cobb, California · 17325 days ago · 1 km deep · 90 km away
  50. 1.99 km W of Cobb, California · 17323 days ago · 1 km deep · 90 km away
  51. 2.411 km E of Comptche, California · 17323 days ago · 13 km deep · 31 km away
  52. 1.714 km NNW of Potter Valley, California · 17322 days ago · 4 km deep · 16 km away
  53. 3.06 km W of Cobb, California · 17322 days ago · 1 km deep · 90 km away
  54. 1.56 km WSW of Cobb, California · 17319 days ago · 1 km deep · 92 km away
  55. 1.64 km WSW of Cobb, California · 17313 days ago · 1 km deep · 94 km away
  56. 1.65 km WSW of Cobb, California · 17312 days ago · 0 km deep · 93 km away
  57. 2.33 km WSW of Cobb, California · 17311 days ago · 2 km deep · 94 km away
  58. 1.87 km W of Cobb, California · 17308 days ago · 1 km deep · 91 km away

Before

  1. 2.04 km WSW of Cobb, California · 17368 days ago · 4 km deep · 93 km away
  2. 1.916 km E of Potter Valley, California · 17368 days ago · 2 km deep · 41 km away
  3. 2.38 km ENE of Lower Lake, California · 17372 days ago · 9 km deep · 97 km away
  4. 2.14 km WSW of Cobb, California · 17372 days ago · 1 km deep · 94 km away
  5. 1.711 km E of Lower Lake, California · 17372 days ago · 15 km deep · 99 km away
  6. 2.617 km NNE of Nice, California · 17374 days ago · 4 km deep · 59 km away
  7. 2.816 km NNE of Nice, California · 17375 days ago · 7 km deep · 58 km away
  8. 2.68 km WSW of Cobb, California · 17375 days ago · 3 km deep · 93 km away
  9. 1.86 km WSW of Cobb, California · 17376 days ago · 1 km deep · 93 km away
  10. 2.323 km NE of Potter Valley, California · 17376 days ago · 10 km deep · 33 km away
  11. 2.07 km NNW of Redwood Valley, California · 17376 days ago · 7 km deep · 23 km away
  12. 3.213 km WNW of Brooktrails, California · 17377 days ago · 22 km deep · 16 km away
  13. 2.42 km ESE of Calpella, California · 17377 days ago · 6 km deep · 36 km away
  14. 1.87 km W of Cobb, California · 17380 days ago · 0 km deep · 91 km away
  15. 2.06 km ESE of Willits, California · 17380 days ago · 10 km deep · 16 km away
  16. 2.37 km W of Cobb, California · 17381 days ago · 3 km deep · 91 km away
  17. 2.46 km W of Cobb, California · 17384 days ago · 4 km deep · 91 km away
  18. 2.07 km ENE of Brooktrails, California · 17385 days ago · 5 km deep · 7 km away
  19. 2.3Northern California · 17386 days ago · 4 km deep · 91 km away
  20. 1.78 km WSW of Cobb, California · 17387 days ago · 3 km deep · 92 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1045033. Read Sun, Oct 4, 2026, 9:23 AM UTC.