California earthquakes

M1.7 earthquake 2km NE of Chester, CA

A magnitude 1.7 earthquake struck 2km NE of Chester, CA on Sun, May 9, 2021, 6:35 AM PDT (13:35 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.0 0km NNW of Lake Davis, CA. This one was a foreshock.

Chester 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
1.7 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-05-09 13:35:49 UTC
Depth
9.7 km (6.0 mi), shallow
Epicenter
40.321° N, 121.215° 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 0.5 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
124°
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: 47 in the 60 days after this one and 10 in the 30 days before it.

After

  1. 1.913km W of Shingletown, CA · 1974 days ago · 17 km deep · 72 km away
  2. 1.833km NNW of Susanville, CA · 1971 days ago · 13 km deep · 53 km away
  3. 1.625km NNE of Hamilton Branch, CA · 1971 days ago · 2 km deep · 27 km away
  4. 2.01km NW of Lake Davis, CA · 1968 days ago · 4 km deep · 80 km away
  5. 1.69km E of Millville, CA · 1963 days ago · 11 km deep · 78 km away
  6. 2.018km WNW of Round Mountain, CA · 1963 days ago · 13 km deep · 99 km away
  7. 2.20km WNW of Lake Davis, CA · 1961 days ago · 3 km deep · 80 km away
  8. 2.21km WNW of Lake Davis, CA · 1961 days ago · 4 km deep · 80 km away · felt by 1
  9. 2.10km NE of Lake Davis, CA · 1961 days ago · 5 km deep · 81 km away
  10. 2.50km NW of Lake Davis, CA · 1961 days ago · 3 km deep · 80 km away · felt by 2
  11. 2.40km NNW of Lake Davis, CA · 1961 days ago · 4 km deep · 80 km away · felt by 2
  12. 3.00km NNW of Lake Davis, CA · 1961 days ago · 4 km deep · 80 km away · felt by 35
  13. 2.80km ESE of Lake Davis, CA · 1961 days ago · 4 km deep · 81 km away · felt by 5
  14. 2.21km WNW of Lake Davis, CA · 1960 days ago · -2 km deep · 79 km away
  15. 2.80km N of Lake Davis, CA · 1960 days ago · 4 km deep · 80 km away · felt by 14
  16. 2.01km NW of Lake Davis, CA · 1960 days ago · 5 km deep · 80 km away
  17. 2.11km WNW of Lake Davis, CA · 1959 days ago · -1 km deep · 80 km away
  18. 2.41km NW of Lake Davis, CA · 1959 days ago · 3 km deep · 80 km away · felt by 2
  19. 2.51km NW of Lake Davis, CA · 1959 days ago · 4 km deep · 80 km away · felt by 5
  20. 2.114km SE of Honey Lake, CA · 1959 days ago · 12 km deep · 87 km away · felt by 1
  21. 1.920km NE of Red Bluff, CA · 1959 days ago · 10 km deep · 75 km away
  22. 1.67 km ENE of Cromberg, California · 1958 days ago · 7 km deep · 70 km away
  23. 1.65km N of Millville, CA · 1956 days ago · 14 km deep · 88 km away
  24. 2.60km W of Lake Davis, CA · 1956 days ago · 3 km deep · 80 km away · felt by 3
  25. 1.74km NNE of Canyondam, CA · 1951 days ago · 8 km deep · 19 km away
  26. 1.63km ENE of Prattville, CA · 1948 days ago · 7 km deep · 14 km away
  27. 1.80 km S of Lake Davis, California · 1944 days ago · 7 km deep · 81 km away
  28. 2.32km N of Canyondam, CA · 1943 days ago · 5 km deep · 19 km away
  29. 2.14km SSW of East Shore, CA · 1943 days ago · 5 km deep · 16 km away
  30. 2.02km SW of McArthur, CA · 1940 days ago · 12 km deep · 81 km away
  31. 1.56km NNE of Millville, CA · 1937 days ago · 12 km deep · 86 km away
  32. 1.51km WSW of Canyondam, CA · 1937 days ago · 10 km deep · 21 km away
  33. 1.613km SW of Almanor, CA · 1936 days ago · 9 km deep · 21 km away
  34. 1.62km E of Palo Cedro, CA · 1934 days ago · 6 km deep · 89 km away
  35. 1.514km WSW of Almanor, CA · 1934 days ago · 11 km deep · 21 km away
  36. 1.514km N of Shingletown, CA · 1932 days ago · 12 km deep · 67 km away
  37. 2.111km W of Almanor, CA · 1931 days ago · 5 km deep · 14 km away
  38. 2.110km W of Almanor, CA · 1930 days ago · 8 km deep · 14 km away
  39. 1.919km NW of McArthur, CA · 1928 days ago · 4 km deep · 98 km away
  40. 1.54km S of Canyondam, CA · 1927 days ago · 4 km deep · 24 km away
  41. 1.614km NNE of Mineral, CA · 1927 days ago · 3 km deep · 30 km away
  42. 1.515km ENE of Mineral, CA · 1924 days ago · 5 km deep · 17 km away
  43. 1.78km WNW of Chester, CA · 1924 days ago · 6 km deep · 9 km away
  44. 1.610km WSW of Round Mountain, CA · 1923 days ago · 12 km deep · 88 km away
  45. 2.26km SSE of Quincy, CA · 1922 days ago · 9 km deep · 54 km away
  46. 1.56 km SSE of Quincy, California · 1921 days ago · 4 km deep · 55 km away
  47. 2.548km NNW of Susanville, CA · 1918 days ago · 14 km deep · 62 km away

Before

  1. 2.72km NNW of Chico, CA · 1982 days ago · 14 km deep · 83 km away · felt by 4
  2. 2.219km WSW of Manton, CA · 1985 days ago · 15 km deep · 71 km away
  3. 1.818km WSW of Almanor, CA · 1990 days ago · 11 km deep · 22 km away
  4. 2.010km WNW of Viola, CA · 1990 days ago · 10 km deep · 55 km away
  5. 1.89km ESE of Millville, CA · 1991 days ago · 16 km deep · 77 km away
  6. 2.19km NNE of Burney, CA · 1997 days ago · 13 km deep · 80 km away
  7. 1.814km NNW of Viola, CA · 1999 days ago · 0 km deep · 57 km away
  8. 1.921km SE of Anderson, CA · 1999 days ago · 12 km deep · 75 km away
  9. 2.39km ENE of Viola, CA · 2002 days ago · 3 km deep · 39 km away
  10. 2.23km ENE of Canyondam, CA · 2004 days ago · 5 km deep · 21 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73560200. Read Sun, Oct 4, 2026, 10:52 PM UTC.