California earthquakes

M2.1 earthquake 4 km SSE of Keddie, California

A magnitude 2.1 earthquake struck 4 km SSE of Keddie, California on Tue, Apr 27, 1982, 6:05 PM PDT (01:05 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.3 3 km ENE of Sierra Brooks, California. This one was a foreshock.

Quincy 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
1982-04-28 01:05:22 UTC
Depth
6.6 km (4.1 mi), shallow
Epicenter
39.977° N, 120.951° 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 1.3 km horizontally, 5.8 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
227°, 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: 35 in the 60 days after this one and 26 in the 30 days before it.

After

  1. 2.50 km W of Graeagle, California · 16222 days ago · 5 km deep · 36 km away
  2. 1.716 km NW of Chester, California · 16220 days ago · 6 km deep · 60 km away
  3. 1.521 km NNW of Chester, California · 16220 days ago · 3 km deep · 65 km away
  4. 1.82 km E of Oroville, California · 16218 days ago · 9 km deep · 71 km away
  5. 1.911 km SE of Mineral, California · 16217 days ago · 9 km deep · 57 km away
  6. 2.312 km ESE of Graniteville, California · 16217 days ago · 15 km deep · 70 km away
  7. 1.84 km W of Twain, California · 16213 days ago · 0 km deep · 15 km away
  8. 2.012 km W of La Porte, California · 16212 days ago · 3 km deep · 36 km away
  9. 2.39 km NNW of Old Station, California · 16209 days ago · 8 km deep · 97 km away
  10. 1.511 km NW of Chester, California · 16208 days ago · 3 km deep · 55 km away
  11. 2.34 km SE of Palermo, California · 16208 days ago · 6 km deep · 79 km away
  12. 1.64 km SE of Palermo, California · 16206 days ago · 6 km deep · 79 km away
  13. 2.73 km NW of Truckee, California · 16201 days ago · 21 km deep · 94 km away
  14. 2.411 km N of Little Grass Valley, California · 16198 days ago · 11 km deep · 18 km away
  15. 1.717 km NE of Mineral, California · 16198 days ago · 4 km deep · 68 km away
  16. 2.8Northern California · 16195 days ago · 8 km deep · 49 km away
  17. 1.95 km SSW of Whitehawk, California · 16194 days ago · 7 km deep · 46 km away
  18. 2.37 km NNW of Truckee, California · 16194 days ago · 17 km deep · 91 km away
  19. 2.36 km SSW of Whitehawk, California · 16194 days ago · 5 km deep · 46 km away
  20. 1.76 km SSW of Whitehawk, California · 16193 days ago · 5 km deep · 48 km away
  21. 1.93 km NE of Clipper Mills, California · 16192 days ago · 2 km deep · 49 km away
  22. 2.113 km W of La Porte, California · 16190 days ago · 1 km deep · 36 km away
  23. 2.117 km WSW of Chester, California · 16190 days ago · 4 km deep · 48 km away
  24. 3.33 km ENE of Sierra Brooks, California · 16188 days ago · 11 km deep · 75 km away
  25. 3.12 km E of Oroville, California · 16186 days ago · 9 km deep · 71 km away
  26. 3.02 km E of Oroville, California · 16186 days ago · 9 km deep · 71 km away
  27. 3.22 km E of Oroville, California · 16186 days ago · 9 km deep · 71 km away
  28. 1.62 km ENE of Oroville, California · 16186 days ago · 9 km deep · 71 km away
  29. 1.65 km E of Paynes Creek, California · 16182 days ago · 3 km deep · 86 km away
  30. 1.93 km WNW of Truckee, California · 16181 days ago · 4 km deep · 95 km away
  31. 2.57 km E of Keddie, California · 16180 days ago · 5 km deep · 7 km away
  32. 2.18 km W of Chester, California · 16179 days ago · 2 km deep · 49 km away
  33. 2.23 km N of Lake Almanor West, California · 16179 days ago · 8 km deep · 38 km away
  34. 1.813 km W of Chester, California · 16174 days ago · -2 km deep · 51 km away
  35. 2.12 km SSW of Chester, California · 16168 days ago · -2 km deep · 42 km away

Before

  1. 2.31 km ESE of East Shore, California · 16226 days ago · -1 km deep · 29 km away
  2. 2.40 km WNW of Paynes Creek, California · 16227 days ago · 9 km deep · 92 km away
  3. 2.03 km E of Twain, California · 16228 days ago · 20 km deep · 8 km away
  4. 2.510 km E of Manton, California · 16229 days ago · 0 km deep · 86 km away
  5. 1.84 km W of Manton, California · 16230 days ago · 1 km deep · 97 km away
  6. 2.26 km WNW of Manton, California · 16231 days ago · 10 km deep · 99 km away
  7. 1.631 km E of Old Station, California · 16231 days ago · 2 km deep · 82 km away
  8. 1.99 km WNW of Chester, California · 16231 days ago · 2 km deep · 52 km away
  9. 2.38 km WSW of Lake Almanor West, California · 16234 days ago · 2 km deep · 38 km away
  10. 1.65 km NW of Old Station, California · 16235 days ago · 3 km deep · 93 km away
  11. 1.711 km ESE of Mineral, California · 16235 days ago · 6 km deep · 58 km away
  12. 1.811 km W of Chester, California · 16237 days ago · 4 km deep · 50 km away
  13. 2.012 km N of Mineral, California · 16238 days ago · 19 km deep · 76 km away
  14. 1.816 km NNE of Mineral, California · 16239 days ago · 1 km deep · 72 km away
  15. 2.55 km W of Bangor, California · 16240 days ago · 3 km deep · 79 km away
  16. 1.610 km WNW of Chester, California · 16243 days ago · 1 km deep · 53 km away
  17. 1.712 km WNW of Chester, California · 16243 days ago · 4 km deep · 55 km away
  18. 1.98 km SW of Paynes Creek, California · 16244 days ago · 3 km deep · 93 km away
  19. 2.014 km E of Mineral, California · 16244 days ago · 9 km deep · 57 km away
  20. 2.54 km ESE of East Quincy, California · 16246 days ago · 2 km deep · 11 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1074004. Read Tue, Sep 29, 2026, 6:33 AM UTC.