California earthquakes

M1.8 earthquake 5 km SE of Willows, California

A magnitude 1.8 earthquake struck 5 km SE of Willows, California on Thu, Mar 30, 1978, 10:14 PM PST (06:14 UTC), 20 km (12 mi) below the surface.

A larger quake followed: M1.9 3 km ESE of Calpella, 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
1.8 (md), micro
Local time
UTC
1978-03-31 06:14:54 UTC
Depth
19.8 km (12.3 mi), shallow
Epicenter
39.490° N, 122.142° 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 1.4 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.29
Depth from
From location
Station coverage gap
262°, poorly surrounded by stations
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 168 in the 60 days after this one and 31 in the 30 days before it.

After

  1. 1.81 km SE of Calpella, California · 17708 days ago · 4 km deep · 95 km away
  2. 1.64 km ESE of Calpella, California · 17707 days ago · 5 km deep · 93 km away
  3. 1.93 km ESE of Calpella, California · 17707 days ago · 6 km deep · 94 km away
  4. 1.95 km NE of Ukiah, California · 17707 days ago · 0 km deep · 94 km away
  5. 1.93 km ESE of Calpella, California · 17707 days ago · 6 km deep · 93 km away
  6. 1.73 km ESE of Calpella, California · 17707 days ago · 4 km deep · 93 km away
  7. 1.98 km WSW of Cobb, California · 17707 days ago · 0 km deep · 96 km away
  8. 1.83 km ESE of Calpella, California · 17707 days ago · 6 km deep · 93 km away
  9. 1.94 km SE of Calpella, California · 17707 days ago · 5 km deep · 94 km away
  10. 1.93 km ESE of Calpella, California · 17707 days ago · 6 km deep · 93 km away
  11. 1.85 km SE of Calpella, California · 17706 days ago · 5 km deep · 94 km away
  12. 2.03 km SE of Calpella, California · 17706 days ago · -1 km deep · 95 km away
  13. 2.63 km ESE of Calpella, California · 17706 days ago · 6 km deep · 94 km away
  14. 1.84 km SE of Calpella, California · 17706 days ago · 0 km deep · 93 km away
  15. 2.04 km SE of Calpella, California · 17705 days ago · 4 km deep · 94 km away
  16. 2.72 km SE of Calpella, California · 17705 days ago · 4 km deep · 94 km away
  17. 2.56 km WNW of Bangor, California · 17705 days ago · 5 km deep · 59 km away
  18. 1.93 km ESE of Calpella, California · 17705 days ago · 5 km deep · 93 km away
  19. 1.94 km SE of Calpella, California · 17705 days ago · 3 km deep · 93 km away
  20. 1.94 km SE of Calpella, California · 17705 days ago · 4 km deep · 94 km away
  21. 1.64 km ESE of Calpella, California · 17705 days ago · -1 km deep · 93 km away
  22. 1.75 km ESE of Calpella, California · 17704 days ago · -1 km deep · 92 km away
  23. 1.65 km ESE of Calpella, California · 17704 days ago · -1 km deep · 92 km away
  24. 2.02 km ESE of Calpella, California · 17704 days ago · 2 km deep · 94 km away
  25. 2.55 km SE of Calpella, California · 17704 days ago · 5 km deep · 94 km away
  26. 2.67 km W of Cobb, California · 17704 days ago · 4 km deep · 94 km away
  27. 1.92 km ESE of Calpella, California · 17704 days ago · 2 km deep · 94 km away
  28. 1.95 km ESE of Calpella, California · 17703 days ago · -1 km deep · 92 km away
  29. 2.25 km NE of Ukiah, California · 17703 days ago · 0 km deep · 94 km away
  30. 1.92 km ESE of Calpella, California · 17702 days ago · 6 km deep · 94 km away
  31. 3.22 km E of Calpella, California · 17702 days ago · 11 km deep · 93 km away
  32. 1.85 km SE of Calpella, California · 17702 days ago · 4 km deep · 94 km away
  33. 2.16 km SE of Calpella, California · 17702 days ago · 1 km deep · 94 km away
  34. 1.95 km SE of Calpella, California · 17702 days ago · 3 km deep · 94 km away
  35. 2.43 km ESE of Calpella, California · 17702 days ago · 5 km deep · 94 km away
  36. 2.34 km SE of Calpella, California · 17702 days ago · 7 km deep · 94 km away
  37. 2.04 km ESE of Calpella, California · 17702 days ago · 6 km deep · 92 km away
  38. 1.85 km NE of Ukiah, California · 17701 days ago · 1 km deep · 94 km away
  39. 3.25 km SE of Calpella, California · 17701 days ago · 12 km deep · 94 km away
  40. 1.84 km SE of Calpella, California · 17701 days ago · 4 km deep · 94 km away
  41. 1.95 km SE of Calpella, California · 17701 days ago · 5 km deep · 94 km away
  42. 2.25 km SE of Calpella, California · 17701 days ago · 6 km deep · 94 km away
  43. 2.05 km SE of Calpella, California · 17701 days ago · 2 km deep · 94 km away
  44. 1.65 km SE of Calpella, California · 17701 days ago · 1 km deep · 93 km away
  45. 1.54 km SE of Calpella, California · 17701 days ago · 4 km deep · 93 km away
  46. 1.75 km SE of Calpella, California · 17700 days ago · -1 km deep · 93 km away
  47. 1.73 km E of Calpella, California · 17700 days ago · 10 km deep · 93 km away
  48. 3.25 km SE of Calpella, California · 17700 days ago · 6 km deep · 94 km away
  49. 2.85 km SE of Calpella, California · 17700 days ago · 8 km deep · 94 km away
  50. 2.55 km SE of Calpella, California · 17699 days ago · 6 km deep · 94 km away
  51. 1.74 km SE of Calpella, California · 17699 days ago · 4 km deep · 94 km away
  52. 1.65 km SE of Calpella, California · 17699 days ago · 4 km deep · 94 km away
  53. 1.64 km E of Calpella, California · 17699 days ago · 4 km deep · 91 km away
  54. 2.57 km W of Cobb, California · 17699 days ago · 3 km deep · 95 km away
  55. 1.52 km SSE of Calpella, California · 17699 days ago · 3 km deep · 95 km away
  56. 1.88 km WSW of Cobb, California · 17699 days ago · 2 km deep · 96 km away
  57. 2.22 km ESE of Calpella, California · 17698 days ago · 5 km deep · 93 km away
  58. 2.21 km S of Redwood Valley, California · 17698 days ago · 17 km deep · 95 km away
  59. 1.65 km SE of Calpella, California · 17698 days ago · 4 km deep · 94 km away
  60. 1.75 km ESE of Calpella, California · 17698 days ago · 1 km deep · 92 km away

The first 60 of 168.

Before

  1. 1.73 km SE of Calpella, California · 17708 days ago · 2 km deep · 94 km away
  2. 1.84 km SSE of Calpella, California · 17708 days ago · -1 km deep · 95 km away
  3. 1.87 km WSW of Cobb, California · 17708 days ago · 1 km deep · 96 km away
  4. 1.94 km SE of Calpella, California · 17709 days ago · 0 km deep · 93 km away
  5. 1.76 km WNW of Cobb, California · 17710 days ago · 2 km deep · 92 km away
  6. 1.86 km W of Cobb, California · 17710 days ago · 0 km deep · 94 km away
  7. 2.12 km ESE of Calpella, California · 17710 days ago · 10 km deep · 94 km away
  8. 1.87 km W of Cobb, California · 17710 days ago · 1 km deep · 95 km away
  9. 1.82 km NNW of Redwood Valley, California · 17710 days ago · 8 km deep · 95 km away
  10. 1.84 km ESE of Palermo, California · 17710 days ago · 7 km deep · 57 km away
  11. 1.93 km E of Calpella, California · 17711 days ago · 8 km deep · 92 km away
  12. 1.84 km SE of Calpella, California · 17711 days ago · 8 km deep · 94 km away
  13. 1.83 km ESE of Calpella, California · 17711 days ago · 12 km deep · 93 km away
  14. 2.63 km ESE of Calpella, California · 17711 days ago · 11 km deep · 93 km away
  15. 2.54 km ESE of Calpella, California · 17711 days ago · 9 km deep · 93 km away
  16. 1.95 km SE of Calpella, California · 17711 days ago · 7 km deep · 94 km away
  17. 1.62 km ESE of Calpella, California · 17711 days ago · 4 km deep · 94 km away
  18. 2.74 km SSE of Calpella, California · 17711 days ago · 5 km deep · 95 km away
  19. 2.05 km SE of Calpella, California · 17711 days ago · 3 km deep · 93 km away
  20. 3.14 km N of Talmage, California · 17711 days ago · 10 km deep · 94 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1039630. Read Tue, Sep 22, 2026, 9:40 PM UTC.