QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

11km NE of Winters, CA

· 12 km deep · released about 88 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yolo County 11 kmSolano County 36 kmNapa County 40 kmSacramento County 48 kmSutter County 52 kmColusa County 73 kmContra Costa County 74 kmYuba County 89 kmSan Joaquin County 89 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 2.3 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Yolo County, 11 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2620 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 88 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 88 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 38.5827, -121.8720. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yolo County, CA 11 km (7 mi) SSE of here earthquakes near Yolo County
Solano County, CA 36 km (22 mi) N of here earthquakes near Solano County
Napa County, CA 40 km (25 mi) ENE of here earthquakes near Napa County
Sacramento County, CA 48 km (30 mi) WNW of here earthquakes near Sacramento County
Sutter County, CA 52 km (33 mi) SSW of here earthquakes near Sutter County
Colusa County, CA 73 km (46 mi) SSE of here earthquakes near Colusa County

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

Aftershocks so far

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

  1. 2.2 3km SW of Green Valley, CA
  2. 1.9 14km E of Yountville, CA
  3. 2.3 14km E of Angwin, CA
  4. 1.6 14km E of Angwin, CA
  5. 2.0 13km ESE of Angwin, CA
  6. 3.5 13km E of Angwin, CA
  7. 1.5 15km E of Angwin, CA
  8. 1.6 15km E of Angwin, CA
  9. 2.6 10km S of Esparto, CA
  10. 2.9 9km S of Esparto, CA
  11. 1.6 15km ENE of Yountville, CA
  12. 1.9 13km ENE of Yountville, CA
  13. 1.5 12km E of Yountville, CA
  14. 1.6 12km E of Angwin, CA
  15. 1.5 12km NE of Yountville, 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.