California earthquakes

M2.1 earthquake 11 km E of Red Bluff, California

A magnitude 2.1 earthquake struck 11 km E of Red Bluff, California on Thu, Apr 11, 1985, 5:55 AM PST (13:55 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M2.8 10 km E of Red Bluff, California. This one was a foreshock.

Red Bluff 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), micro
Local time
UTC
1985-04-11 13:55:25 UTC
Depth
14.1 km (8.8 mi), shallow
Epicenter
40.189° N, 122.101° 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 0.6 km horizontally, 2.9 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
220°, 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: 28 in the 60 days after this one and 16 in the 30 days before it.

After

  1. 1.614 km NE of Proberta, California · 15138 days ago · 0 km deep · 6 km away
  2. 2.07 km NE of Covelo, California · 15136 days ago · 5 km deep · 100 km away
  3. 2.810 km E of Red Bluff, California · 15135 days ago · 10 km deep · 2 km away
  4. 1.812 km E of Red Bluff, California · 15135 days ago · 1 km deep · 2 km away
  5. 2.913 km NE of Proberta, California · 15135 days ago · -1 km deep · 2 km away
  6. 2.312 km ESE of Bend, California · 15135 days ago · 17 km deep · 5 km away
  7. 2.010 km E of Red Bluff, California · 15135 days ago · 4 km deep · 2 km away
  8. 2.17 km NNW of Richvale, California · 15133 days ago · 5 km deep · 76 km away
  9. 1.710 km ESE of Covelo, California · 15130 days ago · 1 km deep · 100 km away
  10. 1.710 km E of Red Bluff, California · 15117 days ago · 3 km deep · 2 km away
  11. 2.231 km WSW of Paskenta, California · 15116 days ago · 9 km deep · 81 km away
  12. 1.912 km ENE of Bend, California · 15116 days ago · 7 km deep · 14 km away
  13. 2.31 km SW of Lake Almanor West, California · 15111 days ago · 3 km deep · 75 km away
  14. 2.412 km ENE of Shingletown, California · 15108 days ago · 35 km deep · 47 km away
  15. 1.78 km WSW of Red Bluff, California · 15107 days ago · 17 km deep · 20 km away
  16. 2.613 km ESE of Mineral, California · 15106 days ago · 8 km deep · 57 km away
  17. 1.811 km WNW of Lakehead, California · 15105 days ago · 4 km deep · 90 km away
  18. 1.716 km NE of Mineral, California · 15103 days ago · 4 km deep · 61 km away
  19. 1.514 km S of Hamilton City, California · 15102 days ago · 5 km deep · 65 km away
  20. 2.00 km NE of Butte Meadows, California · 15099 days ago · 3 km deep · 49 km away
  21. 1.78 km WSW of Lake Almanor West, California · 15094 days ago · 11 km deep · 68 km away
  22. 2.013 km NNW of Belden, California · 15093 days ago · 3 km deep · 67 km away
  23. 1.73 km WNW of Chester, California · 15090 days ago · -1 km deep · 72 km away
  24. 1.814 km NNE of Mineral, California · 15087 days ago · 3 km deep · 58 km away
  25. 1.930 km NE of Covelo, California · 15087 days ago · 3 km deep · 80 km away
  26. 2.624 km WNW of Paskenta, California · 15087 days ago · -1 km deep · 67 km away
  27. 2.44 km S of Oroville East, California · 15086 days ago · 2 km deep · 96 km away
  28. 1.915 km E of Cottonwood, California · 15081 days ago · 11 km deep · 23 km away

Before

  1. 1.80 km NNW of Prattville, California · 15140 days ago · 3 km deep · 80 km away
  2. 2.516 km NNE of Elk Creek, California · 15141 days ago · 0 km deep · 58 km away
  3. 2.27 km NNE of Elk Creek, California · 15145 days ago · 12 km deep · 68 km away
  4. 3.01 km ESE of Anderson, California · 15147 days ago · 68 km deep · 32 km away
  5. 2.04 km ENE of Tobin, California · 15148 days ago · 12 km deep · 77 km away
  6. 2.313 km NNE of Mineral, California · 15149 days ago · 2 km deep · 56 km away
  7. 2.914 km E of Cottonwood, California · 15150 days ago · 11 km deep · 21 km away
  8. 2.313 km NNE of Mineral, California · 15151 days ago · 2 km deep · 56 km away
  9. 2.2Northern California · 15152 days ago · 5 km deep · 12 km away
  10. 1.513 km N of Butte Meadows, California · 15156 days ago · 10 km deep · 46 km away
  11. 1.811 km WNW of Chester, California · 15159 days ago · 3 km deep · 67 km away
  12. 1.924 km W of Paskenta, California · 15159 days ago · -1 km deep · 68 km away
  13. 1.79 km NNE of Mineral, California · 15159 days ago · 5 km deep · 54 km away
  14. 1.68 km ESE of Hat Creek, California · 15160 days ago · 3 km deep · 88 km away
  15. 2.19 km NW of Belden, California · 15168 days ago · 4 km deep · 67 km away
  16. 1.86 km ENE of Chico, California · 15169 days ago · 22 km deep · 57 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc47097. Read Tue, Sep 22, 2026, 11:28 PM UTC.