California earthquakes

M2.1 earthquake 4 km S of Willows, California

A magnitude 2.1 earthquake struck 4 km S of Willows, California on Sun, Oct 30, 1977, 7:04 PM PST (03:04 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M2.3 6 km W of Cobb, California. This one was a foreshock.

Willows 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 (ma), micro
Local time
UTC
1977-10-31 03:04:24 UTC
Depth
21.2 km (13.1 mi), shallow
Epicenter
39.486° N, 122.194° 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 1.0 km horizontally, 0.6 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
264°, poorly surrounded by stations
Stations used
19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 78 in the 60 days after this one and 26 in the 30 days before it.

After

  1. 1.64 km W of Bangor, California · 17858 days ago · 7 km deep · 64 km away
  2. 2.36 km W of Cobb, California · 17855 days ago · -1 km deep · 91 km away
  3. 2.05 km NE of Ukiah, California · 17854 days ago · 0 km deep · 90 km away
  4. 2.46 km WSW of Cobb, California · 17851 days ago · 0 km deep · 92 km away
  5. 3.19 km SSW of Willows, California · 17850 days ago · 19 km deep · 6 km away
  6. 1.66 km W of Cobb, California · 17849 days ago · 3 km deep · 91 km away
  7. 3.019 km WSW of Stonyford, California · 17848 days ago · 15 km deep · 52 km away
  8. 3.15 km SE of Palermo, California · 17848 days ago · 7 km deep · 61 km away
  9. 2.27 km W of Cobb, California · 17847 days ago · 3 km deep · 91 km away
  10. 2.57 km W of Cobb, California · 17847 days ago · 3 km deep · 91 km away
  11. 2.07 km WSW of Cobb, California · 17847 days ago · 0 km deep · 92 km away
  12. 1.68 km W of Cobb, California · 17846 days ago · 1 km deep · 92 km away
  13. 2.56 km W of Cobb, California · 17845 days ago · -1 km deep · 92 km away
  14. 1.811 km NE of Angwin, California · 17845 days ago · 10 km deep · 95 km away
  15. 1.84 km ESE of Clear Lake Riviera, California · 17845 days ago · 5 km deep · 74 km away
  16. 2.47 km W of Cobb, California · 17841 days ago · 3 km deep · 91 km away
  17. 1.90 km ESE of Clear Lake Riviera, California · 17841 days ago · 1 km deep · 74 km away
  18. 2.56 km W of Cobb, California · 17840 days ago · 3 km deep · 90 km away
  19. 1.62 km NW of Cobb, California · 17838 days ago · 1 km deep · 86 km away
  20. 4.88 km E of Willits, California · 17836 days ago · 15 km deep · 92 km away
  21. 2.75 km SE of Palermo, California · 17835 days ago · 6 km deep · 61 km away
  22. 2.55 km ENE of Willits, California · 17835 days ago · -1 km deep · 95 km away
  23. 2.38 km NE of Willits, California · 17835 days ago · 0 km deep · 94 km away
  24. 3.46 km E of Willits, California · 17835 days ago · 11 km deep · 94 km away
  25. 3.55 km ENE of Willits, California · 17835 days ago · 1 km deep · 95 km away
  26. 2.65 km ENE of Willits, California · 17835 days ago · 2 km deep · 95 km away
  27. 3.25 km E of Willits, California · 17835 days ago · 9 km deep · 94 km away
  28. 3.45 km ENE of Willits, California · 17835 days ago · 4 km deep · 95 km away
  29. 3.34 km E of Willits, California · 17835 days ago · 10 km deep · 95 km away
  30. 3.05 km ENE of Willits, California · 17835 days ago · 13 km deep · 95 km away
  31. 2.59 km ESE of Willits, California · 17835 days ago · 0 km deep · 92 km away
  32. 2.46 km ESE of Willits, California · 17835 days ago · 5 km deep · 94 km away
  33. 2.64 km ESE of Willits, California · 17835 days ago · 5 km deep · 95 km away
  34. 3.45 km ENE of Willits, California · 17835 days ago · 2 km deep · 95 km away
  35. 2.55 km ENE of Willits, California · 17834 days ago · 1 km deep · 95 km away
  36. 2.85 km NE of Willits, California · 17833 days ago · 2 km deep · 96 km away
  37. 2.51 km NE of Willits, California · 17833 days ago · 1 km deep · 99 km away
  38. 1.76 km W of Cobb, California · 17832 days ago · 4 km deep · 91 km away
  39. 3.28 km WSW of Cobb, California · 17830 days ago · 1 km deep · 93 km away
  40. 2.68 km WSW of Cobb, California · 17830 days ago · 0 km deep · 93 km away
  41. 2.19 km WSW of Cobb, California · 17830 days ago · 1 km deep · 94 km away
  42. 2.29 km WSW of Cobb, California · 17829 days ago · 0 km deep · 93 km away
  43. 3.019 km N of Potter Valley, California · 17829 days ago · 0 km deep · 82 km away
  44. 2.95 km NE of Willits, California · 17828 days ago · -1 km deep · 95 km away
  45. 2.511 km N of Potter Valley, California · 17828 days ago · 1 km deep · 80 km away
  46. 2.414 km NNW of Potter Valley, California · 17828 days ago · 10 km deep · 84 km away
  47. 1.57 km W of Cobb, California · 17825 days ago · 3 km deep · 92 km away
  48. 2.63 km NW of Redwood Valley, California · 17820 days ago · 2 km deep · 92 km away
  49. 2.97 km WSW of Cobb, California · 17817 days ago · 1 km deep · 93 km away
  50. 1.54 km SSE of Palermo, California · 17817 days ago · 4 km deep · 60 km away
  51. 1.97 km W of Cobb, California · 17817 days ago · 3 km deep · 91 km away
  52. 1.88 km WSW of Cobb, California · 17816 days ago · 0 km deep · 93 km away
  53. 2.47 km E of Willits, California · 17816 days ago · 7 km deep · 92 km away
  54. 2.010 km W of North Lakeport, California · 17815 days ago · 5 km deep · 84 km away
  55. 2.216 km NE of Nice, California · 17815 days ago · 9 km deep · 53 km away
  56. 2.38 km WSW of Cobb, California · 17813 days ago · 3 km deep · 93 km away
  57. 1.76 km WSW of Cobb, California · 17812 days ago · -1 km deep · 92 km away
  58. 2.37 km WSW of Cobb, California · 17811 days ago · 4 km deep · 93 km away
  59. 1.712 km NNE of Angwin, California · 17810 days ago · 10 km deep · 91 km away
  60. 1.96 km W of Cobb, California · 17810 days ago · 3 km deep · 91 km away

The first 60 of 78.

Before

  1. 2.27 km E of Cloverdale, California · 17860 days ago · 2 km deep · 100 km away
  2. 1.57 km WSW of Cobb, California · 17862 days ago · 1 km deep · 92 km away
  3. 2.17 km W of Cobb, California · 17863 days ago · 0 km deep · 90 km away
  4. 1.56 km W of Cobb, California · 17863 days ago · 0 km deep · 91 km away
  5. 2.15 km SW of Clearlake, California · 17864 days ago · 3 km deep · 75 km away
  6. 2.116 km NE of Lucerne, California · 17866 days ago · 7 km deep · 51 km away
  7. 1.714 km N of Princeton, California · 17868 days ago · 17 km deep · 19 km away
  8. 1.54 km S of Clear Lake Riviera, California · 17868 days ago · 1 km deep · 78 km away
  9. 1.78 km W of Cobb, California · 17868 days ago · 1 km deep · 92 km away
  10. 2.56 km W of Cobb, California · 17869 days ago · 3 km deep · 91 km away
  11. 2.54 km SSE of Palermo, California · 17870 days ago · 5 km deep · 59 km away
  12. 3.011 km WSW of Mineral, California · 17873 days ago · 7 km deep · 100 km away
  13. 2.02 km ESE of Clearlake, California · 17875 days ago · 5 km deep · 69 km away
  14. 1.97 km WSW of Cobb, California · 17875 days ago · 3 km deep · 93 km away
  15. 2.34 km S of Hamilton City, California · 17881 days ago · 18 km deep · 28 km away
  16. 1.87 km W of Cobb, California · 17881 days ago · 3 km deep · 91 km away
  17. 3.637 km NW of Paskenta, California · 17882 days ago · 12 km deep · 91 km away
  18. 2.26 km W of Cobb, California · 17882 days ago · 4 km deep · 90 km away
  19. 2.37 km WSW of Cobb, California · 17883 days ago · 1 km deep · 92 km away
  20. 2.06 km W of Cobb, California · 17884 days ago · 0 km deep · 91 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1037482. Read Tue, Sep 22, 2026, 3:09 PM UTC.