QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

7km SW of South Yuba City, CA

· 8.7 km deep · released about 7.1 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sutter County 4 kmYuba County 37 kmYolo County 47 kmColusa County 48 kmButte County 66 kmSacramento County 76 kmNevada County 83 kmNapa County 83 kmPlacer County 84 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.6 (md)
Depth
8.7 km below the surface
Felt
no reports yet
Nearest
Sutter County, 4 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2564 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 7.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.1 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 39.0735, -121.6942. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sutter County, CA 4 km (3 mi) NNE of here earthquakes near Sutter County
Yuba County, CA 37 km (23 mi) SW of here earthquakes near Yuba County
Yolo County, CA 47 km (29 mi) NNE of here earthquakes near Yolo County
Colusa County, CA 48 km (30 mi) ESE of here earthquakes near Colusa County
Butte County, CA 66 km (41 mi) S of here earthquakes near Butte County
Sacramento County, CA 76 km (47 mi) NNW of here earthquakes near Sacramento County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

34 earthquakes have been recorded within 50 km since this one.

  1. 2.3 7 km W of Dunnigan, CA
  2. 2.2 5 km SSW of Dunnigan, CA
  3. 2.5 12 km WSW of Lincoln, CA
  4. 2.3 13 km NNE of Rio Linda, CA
  5. 2.8 11 km WSW of Lincoln, CA
  6. 2.2 13 km WSW of Lincoln, CA
  7. 2.1 12 km NW of Roseville, CA
  8. 1.8 11 km SW of Lincoln, CA
  9. 2.2 12 km WSW of Lincoln, CA
  10. 2.0 6km SW of Arbuckle, CA
  11. 2.2 8km N of West Sacramento, CA
  12. 2.0 5km SSE of Oroville East, CA
  13. 4.2 5km S of Oroville East, CA
  14. 2.1 3km SSW of Dunnigan, CA
  15. 1.9 6km SW of Arbuckle, CA

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.