QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

13km NE of Yountville, CA

· 4.9 km deep · released about 120 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Napa County 6 kmYolo County 38 kmSolano County 38 kmSonoma County 58 kmMarin County 65 kmContra Costa County 69 kmColusa County 76 kmSutter County 78 kmSacramento County 80 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 2.4 (md)
Depth
4.9 km below the surface
Felt
1 report · strongest reported intensity IV
Nearest
Napa County, 6 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1861 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 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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 38.4923, -122.2637. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Napa County, CA 6 km (4 mi) ESE of here earthquakes near Napa County
Yolo County, CA 38 km (23 mi) WSW of here earthquakes near Yolo County
Solano County, CA 38 km (23 mi) NW of here earthquakes near Solano County
Sonoma County, CA 58 km (36 mi) E of here earthquakes near Sonoma County
Marin County, CA 65 km (40 mi) NE of here earthquakes near Marin County
Contra Costa County, CA 69 km (43 mi) NNW of here earthquakes near Contra Costa County

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

Aftershocks so far

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

  1. 2.7 1km SSE of Vallejo, CA
  2. 1.7 3km SW of Anderson Springs, CA
  3. 1.6 10km NE of Healdsburg, CA
  4. 1.8 3km SE of Larkfield-Wikiup, CA
  5. 1.5 5km E of Vallejo, CA
  6. 1.8 6km W of Allendale, CA
  7. 1.6 10km WNW of Calistoga, CA
  8. 2.2 5km E of Vallejo, CA
  9. 1.8 3km SW of Anderson Springs, CA
  10. 1.6 5km E of Vallejo, CA
  11. 1.5 7km S of Calistoga, CA
  12. 1.7 3km SW of Angwin, CA
  13. 1.8 8km NNE of Black Point-Green Point, CA
  14. 1.8 10km NNE of Windsor, CA
  15. 1.8 5km ENE of Vallejo, 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.