California earthquakes

M2.2 earthquake 21km NE of Viola, CA

A magnitude 2.2 earthquake struck 21km NE of Viola, CA on Tue, Dec 14, 2021, 10:40 PM PST (06:40 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M2.9 12km SE of Mineral, CA. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.2 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-12-15 06:40:19 UTC
Depth
12.4 km (7.7 mi), shallow
Epicenter
40.662° N, 121.509° 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, 1.2 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
104°
Stations used
15

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 19 in the 30 days before it.

After

  1. 1.810km ESE of Millville, CA · 1750 days ago · 16 km deep · 50 km away
  2. 2.421km SSE of Mineral, CA · 1747 days ago · 15 km deep · 54 km away · felt by 2
  3. 2.39km WSW of Shingletown, CA · 1746 days ago · 11 km deep · 46 km away
  4. 1.67km WSW of Shingletown, CA · 1746 days ago · 13 km deep · 44 km away · felt by 1
  5. 1.629 km NW of Susanville, California · 1742 days ago · 0 km deep · 51 km away
  6. 2.33km ENE of Prattville, CA · 1740 days ago · 6 km deep · 59 km away
  7. 2.53km E of Prattville, CA · 1740 days ago · 5 km deep · 60 km away · felt by 2
  8. 2.912km SE of Mineral, CA · 1739 days ago · 8 km deep · 43 km away · felt by 3
  9. 2.28km W of Chester, CA · 1736 days ago · 9 km deep · 41 km away
  10. 1.811km ESE of Millville, CA · 1733 days ago · 12 km deep · 49 km away
  11. 1.724km N of Shasta Lake, CA · 1724 days ago · 18 km deep · 80 km away
  12. 1.99km ESE of Millville, CA · 1717 days ago · 18 km deep · 50 km away
  13. 1.56km NNE of Millville, CA · 1716 days ago · 13 km deep · 56 km away
  14. 2.324km NNE of Forest Ranch, CA · 1715 days ago · 9 km deep · 64 km away
  15. 1.88km NNW of Bella Vista, CA · 1713 days ago · 19 km deep · 64 km away
  16. 1.68km NNW of Bella Vista, CA · 1711 days ago · 19 km deep · 64 km away
  17. 1.74km ESE of Chester, CA · 1709 days ago · 9 km deep · 49 km away
  18. 1.85km E of Chester, CA · 1709 days ago · 8 km deep · 49 km away
  19. 1.615km W of Round Mountain, CA · 1706 days ago · 9 km deep · 53 km away
  20. 2.14km NNW of Canyondam, CA · 1703 days ago · 6 km deep · 62 km away
  21. 1.72 km SW of Canyondam, California · 1703 days ago · 4 km deep · 67 km away
  22. 1.86km NNE of Millville, CA · 1697 days ago · 12 km deep · 56 km away
  23. 1.62km N of McCloud, CA · 1696 days ago · 10 km deep · 86 km away
  24. 1.83km N of McCloud, CA · 1696 days ago · 10 km deep · 87 km away

Before

  1. 1.727km N of Shasta Lake, CA · 1758 days ago · 14 km deep · 78 km away
  2. 1.62km E of Prattville, CA · 1759 days ago · 4 km deep · 59 km away
  3. 2.82km ENE of Prattville, CA · 1759 days ago · 6 km deep · 59 km away · felt by 10
  4. 2.52km ENE of Prattville, CA · 1759 days ago · 5 km deep · 59 km away · felt by 1
  5. 1.823km N of Shasta Lake, CA · 1759 days ago · 10 km deep · 77 km away
  6. 1.71km NE of Shasta Lake, CA · 1760 days ago · 16 km deep · 72 km away
  7. 1.713km NNE of Shingletown, CA · 1761 days ago · 10 km deep · 27 km away
  8. 1.99km E of Montgomery Creek, CA · 1765 days ago · 13 km deep · 33 km away
  9. 2.416km SSE of Mineral, CA · 1771 days ago · 6 km deep · 49 km away
  10. 1.712km WSW of Chester, CA · 1772 days ago · 7 km deep · 44 km away
  11. 1.58km SSE of Mineral, CA · 1772 days ago · 10 km deep · 42 km away
  12. 1.612km W of Chester, CA · 1772 days ago · 7 km deep · 43 km away
  13. 1.711km NNE of Bella Vista, CA · 1772 days ago · 10 km deep · 58 km away
  14. 1.77km SSE of Mineral, CA · 1772 days ago · 12 km deep · 41 km away
  15. 1.612km N of Mineral, CA · 1775 days ago · 4 km deep · 22 km away
  16. 1.93km NE of Viola, CA · 1775 days ago · 6 km deep · 18 km away
  17. 2.36km ENE of Shasta, CA · 1776 days ago · 22 km deep · 77 km away
  18. 2.82km NE of Almanor, CA · 1779 days ago · 8 km deep · 56 km away · felt by 5
  19. 1.69km S of Mineral, CA · 1779 days ago · 14 km deep · 43 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73663911. Read Sun, Oct 4, 2026, 9:11 AM UTC.