California earthquakes

M2.0 earthquake 10km WNW of Viola, CA

A magnitude 2.0 earthquake struck 10km WNW of Viola, CA on Fri, Apr 23, 2021, 10:08 AM PDT (17:08 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.9 25km N of Shasta Lake, 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
2.0 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-04-23 17:08:31 UTC
Depth
9.9 km (6.2 mi), shallow
Epicenter
40.563° N, 121.785° 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 0.4 km horizontally, 1.4 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
55°
Stations used
24

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 20 in the 30 days before it.

After

  1. 1.818km WSW of Almanor, CA · 1990 days ago · 11 km deep · 57 km away
  2. 1.83km WSW of Shasta Lake, CA · 1986 days ago · 17 km deep · 54 km away
  3. 2.219km WSW of Manton, CA · 1985 days ago · 15 km deep · 35 km away
  4. 2.72km NNW of Chico, CA · 1982 days ago · 14 km deep · 90 km away · felt by 4
  5. 1.729km N of Shasta Lake, CA · 1975 days ago · 14 km deep · 68 km away
  6. 1.72km NE of Chester, CA · 1974 days ago · 10 km deep · 55 km away
  7. 1.913km W of Shingletown, CA · 1974 days ago · 17 km deep · 23 km away
  8. 2.925km N of Shasta Lake, CA · 1971 days ago · 20 km deep · 62 km away · felt by 16
  9. 1.833km NNW of Susanville, CA · 1971 days ago · 13 km deep · 83 km away
  10. 1.625km NNE of Hamilton Branch, CA · 1971 days ago · 2 km deep · 69 km away
  11. 2.010km ENE of French Gulch, CA · 1970 days ago · 15 km deep · 64 km away
  12. 1.69km E of Millville, CA · 1963 days ago · 11 km deep · 25 km away
  13. 2.018km WNW of Round Mountain, CA · 1963 days ago · 13 km deep · 45 km away
  14. 1.920km NE of Red Bluff, CA · 1959 days ago · 10 km deep · 38 km away
  15. 1.65km N of Millville, CA · 1956 days ago · 14 km deep · 34 km away
  16. 1.74km NNE of Canyondam, CA · 1951 days ago · 8 km deep · 74 km away
  17. 1.63km ENE of Prattville, CA · 1948 days ago · 7 km deep · 68 km away
  18. 2.32km N of Canyondam, CA · 1943 days ago · 5 km deep · 73 km away
  19. 2.14km SSW of East Shore, CA · 1943 days ago · 5 km deep · 71 km away
  20. 2.02km SW of McArthur, CA · 1940 days ago · 12 km deep · 61 km away
  21. 2.112km NNE of Shasta Lake, CA · 1940 days ago · 21 km deep · 51 km away
  22. 1.56km NNE of Millville, CA · 1937 days ago · 12 km deep · 32 km away
  23. 1.51km WSW of Canyondam, CA · 1937 days ago · 10 km deep · 74 km away
  24. 1.613km SW of Almanor, CA · 1936 days ago · 9 km deep · 62 km away
  25. 1.62km E of Palo Cedro, CA · 1934 days ago · 6 km deep · 37 km away
  26. 1.514km WSW of Almanor, CA · 1934 days ago · 11 km deep · 60 km away
  27. 1.514km N of Shingletown, CA · 1932 days ago · 12 km deep · 12 km away
  28. 2.111km W of Almanor, CA · 1931 days ago · 5 km deep · 57 km away

Before

  1. 1.89km ESE of Millville, CA · 1991 days ago · 16 km deep · 26 km away
  2. 2.19km NNE of Burney, CA · 1997 days ago · 13 km deep · 46 km away
  3. 1.814km NNW of Viola, CA · 1999 days ago · 0 km deep · 9 km away
  4. 1.921km SE of Anderson, CA · 1999 days ago · 12 km deep · 36 km away
  5. 1.623km N of Shasta Lake, CA · 2002 days ago · 9 km deep · 62 km away
  6. 2.39km ENE of Viola, CA · 2002 days ago · 3 km deep · 18 km away
  7. 2.23km ENE of Canyondam, CA · 2004 days ago · 5 km deep · 75 km away
  8. 2.02km ENE of Montgomery Creek, CA · 2004 days ago · 15 km deep · 33 km away
  9. 1.928km N of Shasta Lake, CA · 2005 days ago · 15 km deep · 64 km away
  10. 2.07km ESE of McCloud, CA · 2006 days ago · 8 km deep · 78 km away
  11. 1.730km NNW of Forest Ranch, CA · 2007 days ago · 16 km deep · 47 km away
  12. 1.84km SSE of Hamilton City, CA · 2009 days ago · 16 km deep · 97 km away
  13. 1.95km NNE of Almanor, CA · 2009 days ago · 7 km deep · 63 km away
  14. 2.214km NNE of Mineral, CA · 2009 days ago · 3 km deep · 25 km away
  15. 1.814km NNE of Mineral, CA · 2009 days ago · 3 km deep · 25 km away
  16. 1.66km WNW of Palo Cedro, CA · 2009 days ago · 15 km deep · 44 km away
  17. 1.512km W of Shingletown, CA · 2010 days ago · 17 km deep · 22 km away
  18. 3.013km W of Shingletown, CA · 2013 days ago · 19 km deep · 24 km away · felt by 77
  19. 1.516km NNW of Shingletown, CA · 2015 days ago · 3 km deep · 17 km away
  20. 2.126km N of Shasta Lake, CA · 2020 days ago · 15 km deep · 65 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73553470. Read Sun, Oct 4, 2026, 10:56 PM UTC.