QuakeIndex

Earthquake · automatic estimate, may change

M 2.3md

7 km W of Dunnigan, CA

· 0.3 km deep · released about 79 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yolo County 24 kmSutter County 35 kmColusa County 38 kmNapa County 47 kmLake County 66 kmSolano County 67 kmYuba County 75 kmSacramento County 76 kmSonoma County 85 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
0.3 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Yolo County, 24 km SSE
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 655 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 79 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 5.8 190,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 12× the energy of this one
  4. This earthquake M 2.3 about 79 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 38.8672, -122.0443. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yolo County, CA 24 km (15 mi) NNW of here earthquakes near Yolo County
Sutter County, CA 35 km (22 mi) WSW of here earthquakes near Sutter County
Colusa County, CA 38 km (24 mi) SSE of here earthquakes near Colusa County
Napa County, CA 47 km (29 mi) NNE of here earthquakes near Napa County
Lake County, CA 66 km (41 mi) ESE of here earthquakes near Lake County
Solano County, CA 67 km (42 mi) N of here earthquakes near Solano County

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

Aftershocks so far

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

  1. 1.9 10 km ENE of Hidden Valley Lake, CA
  2. 2.4 10 km ENE of Hidden Valley Lake, CA
  3. 1.5 9 km ENE of Hidden Valley Lake, CA
  4. 1.9 9 km ENE of Clearlake, CA
  5. 1.6 14 km ESE of Hidden Valley Lake, CA
  6. 1.6 4 km ESE of Lower Lake, CA
  7. 1.8 4 km ESE of Lower Lake, CA
  8. 1.5 4 km ESE of Lower Lake, CA
  9. 1.7 10 km ENE of Hidden Valley Lake, CA
  10. 2.0 4 km NE of Middletown, CA
  11. 1.6 10 km ENE of Hidden Valley Lake, CA
  12. 1.9 10 km ESE of Hidden Valley Lake, CA
  13. 1.8 9 km E of Hidden Valley Lake, CA
  14. 1.9 14 km E of Angwin, CA
  15. 1.7 13 km NNE of Angwin, 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.