California earthquakes

M1.8 earthquake 6 km ENE of Chico, California

A magnitude 1.8 earthquake struck 6 km ENE of Chico, California on Tue, Mar 12, 1985, 5:22 PM PST (01:22 UTC), 22 km (13 mi) below the surface.

A larger quake followed: M2.3 2 km WNW of La Porte, California. This one was a foreshock.

Chico 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
1985-03-13 01:22:37 UTC
Depth
21.6 km (13.4 mi), shallow
Epicenter
39.747° N, 121.766° 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 0.9 km horizontally, 1.4 km in depth
Magnitude uncertainty
±0.22
Depth from
From location
Station coverage gap
207°, poorly surrounded by stations
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: 55 in the 60 days after this one and 15 in the 30 days before it.

After

  1. 2.32 km WNW of La Porte, California · 15169 days ago · 12 km deep · 65 km away
  2. 1.98 km W of La Porte, California · 15169 days ago · 11 km deep · 59 km away
  3. 2.58 km WSW of La Porte, California · 15169 days ago · 14 km deep · 59 km away
  4. 2.19 km NW of Belden, California · 15168 days ago · 4 km deep · 50 km away
  5. 1.65 km W of La Porte, California · 15166 days ago · 12 km deep · 61 km away
  6. 1.97 km W of La Porte, California · 15165 days ago · 12 km deep · 60 km away
  7. 2.27 km W of La Porte, California · 15163 days ago · 7 km deep · 60 km away
  8. 1.96 km NE of Crescent Mills, California · 15161 days ago · 3 km deep · 89 km away
  9. 1.79 km NNE of Mineral, California · 15159 days ago · 5 km deep · 78 km away
  10. 1.924 km W of Paskenta, California · 15159 days ago · -1 km deep · 92 km away
  11. 1.811 km WNW of Chester, California · 15159 days ago · 3 km deep · 77 km away
  12. 1.513 km N of Butte Meadows, California · 15156 days ago · 10 km deep · 54 km away
  13. 1.919 km WSW of Williams, California · 15153 days ago · 1 km deep · 87 km away
  14. 2.2Northern California · 15152 days ago · 5 km deep · 46 km away
  15. 2.420 km WSW of Williams, California · 15151 days ago · 0 km deep · 88 km away
  16. 2.313 km NNE of Mineral, California · 15151 days ago · 2 km deep · 82 km away
  17. 1.818 km W of Williams, California · 15151 days ago · 4 km deep · 86 km away
  18. 2.914 km E of Cottonwood, California · 15150 days ago · 11 km deep · 76 km away
  19. 3.220 km WSW of Williams, California · 15149 days ago · 5 km deep · 89 km away
  20. 1.719 km WSW of Williams, California · 15149 days ago · 2 km deep · 88 km away
  21. 2.420 km WSW of Williams, California · 15149 days ago · 1 km deep · 88 km away
  22. 1.617 km W of Williams, California · 15149 days ago · 3 km deep · 85 km away
  23. 2.220 km WSW of Williams, California · 15149 days ago · 6 km deep · 88 km away
  24. 2.520 km WSW of Williams, California · 15149 days ago · 5 km deep · 88 km away
  25. 2.313 km NNE of Mineral, California · 15149 days ago · 2 km deep · 82 km away
  26. 2.417 km WSW of Williams, California · 15148 days ago · 5 km deep · 85 km away
  27. 2.04 km ENE of Tobin, California · 15148 days ago · 12 km deep · 49 km away
  28. 3.01 km ESE of Anderson, California · 15147 days ago · 68 km deep · 89 km away
  29. 2.219 km WSW of Williams, California · 15147 days ago · 4 km deep · 88 km away
  30. 2.120 km WSW of Williams, California · 15147 days ago · 2 km deep · 89 km away
  31. 1.85 km WNW of Dobbins, California · 15146 days ago · 19 km deep · 58 km away
  32. 2.27 km NNE of Elk Creek, California · 15145 days ago · 12 km deep · 64 km away
  33. 1.820 km WSW of Williams, California · 15143 days ago · 4 km deep · 89 km away
  34. 2.516 km NNE of Elk Creek, California · 15141 days ago · 0 km deep · 59 km away
  35. 1.80 km NNW of Prattville, California · 15140 days ago · 3 km deep · 73 km away
  36. 2.111 km E of Red Bluff, California · 15139 days ago · 14 km deep · 57 km away
  37. 1.614 km NE of Proberta, California · 15138 days ago · 0 km deep · 52 km away
  38. 2.810 km E of Red Bluff, California · 15135 days ago · 10 km deep · 56 km away
  39. 1.812 km E of Red Bluff, California · 15135 days ago · 1 km deep · 55 km away
  40. 2.913 km NE of Proberta, California · 15135 days ago · -1 km deep · 55 km away
  41. 2.312 km ESE of Bend, California · 15135 days ago · 17 km deep · 59 km away
  42. 2.010 km E of Red Bluff, California · 15135 days ago · 4 km deep · 56 km away
  43. 2.17 km NNW of Richvale, California · 15133 days ago · 5 km deep · 21 km away
  44. 2.221 km WSW of Williams, California · 15133 days ago · 0 km deep · 90 km away
  45. 3.710 km WSW of Meridian, California · 15132 days ago · 18 km deep · 74 km away
  46. 2.29 km WSW of Meridian, California · 15132 days ago · 12 km deep · 73 km away
  47. 2.88 km NNE of Arbuckle, California · 15131 days ago · 3 km deep · 77 km away
  48. 2.322 km WSW of Williams, California · 15130 days ago · 3 km deep · 91 km away
  49. 2.58 km WSW of Meridian, California · 15129 days ago · 12 km deep · 73 km away
  50. 2.57 km SW of Meridian, California · 15120 days ago · 10 km deep · 74 km away
  51. 2.321 km WSW of Williams, California · 15119 days ago · 0 km deep · 90 km away
  52. 1.710 km E of Red Bluff, California · 15117 days ago · 3 km deep · 57 km away
  53. 2.231 km WSW of Paskenta, California · 15116 days ago · 9 km deep · 95 km away
  54. 1.912 km ENE of Bend, California · 15116 days ago · 7 km deep · 68 km away
  55. 2.31 km SW of Lake Almanor West, California · 15111 days ago · 3 km deep · 71 km away

Before

  1. 1.513 km NE of Butte Meadows, California · 15172 days ago · 2 km deep · 55 km away
  2. 2.21 km NNW of Plumas Eureka, California · 15172 days ago · 3 km deep · 95 km away
  3. 1.79 km W of Cottonwood, California · 15173 days ago · 5 km deep · 87 km away
  4. 2.53 km S of Graeagle, California · 15176 days ago · 4 km deep · 97 km away
  5. 2.53 km N of Plumas Eureka, California · 15176 days ago · -1 km deep · 95 km away
  6. 1.714 km NNE of Mineral, California · 15179 days ago · 3 km deep · 82 km away
  7. 2.015 km SW of Lake Almanor West, California · 15186 days ago · 8 km deep · 57 km away
  8. 2.115 km NNE of Shingletown, California · 15189 days ago · 13 km deep · 97 km away
  9. 1.817 km ENE of Mineral, California · 15192 days ago · 7 km deep · 81 km away
  10. 2.316 km ENE of Mineral, California · 15192 days ago · 3 km deep · 80 km away
  11. 1.617 km ENE of Mineral, California · 15192 days ago · 8 km deep · 81 km away
  12. 2.317 km ENE of Mineral, California · 15192 days ago · 6 km deep · 81 km away
  13. 1.816 km ENE of Mineral, California · 15193 days ago · 6 km deep · 80 km away
  14. 1.72 km N of Lake Almanor West, California · 15196 days ago · 6 km deep · 75 km away
  15. 1.83 km NNW of Lake Almanor West, California · 15199 days ago · 3 km deep · 75 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc44897. Read Tue, Sep 22, 2026, 11:29 PM UTC.