QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0md

12km NE of Napa, CA

· 8.3 km deep · released about 35 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Napa County 21 kmSolano County 23 kmYolo County 43 kmContra Costa County 53 kmMarin County 61 kmSonoma County 68 kmSacramento County 73 kmAlameda County 83 kmSutter 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 2.0 (md)
Depth
8.3 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Napa County, 21 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2768 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 35 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 440,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 310,000× the energy of this one
  3. Around the size people start to feel M 3.0 28× the energy of this one
  4. This earthquake M 2.0 about 35 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 38.3615, -122.1742. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Napa County, CA 21 km (13 mi) SE of here earthquakes near Napa County
Solano County, CA 23 km (14 mi) WNW of here earthquakes near Solano County
Yolo County, CA 43 km (26 mi) SW of here earthquakes near Yolo County
Contra Costa County, CA 53 km (33 mi) NNW of here earthquakes near Contra Costa County
Marin County, CA 61 km (38 mi) NE of here earthquakes near Marin County
Sonoma County, CA 68 km (42 mi) ESE of here earthquakes near Sonoma County

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

Aftershocks so far

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

  1. 2.2 3km WSW of American Canyon, CA
  2. 1.9 2km NNW of Crockett, CA
  3. 1.7 7km N of Kenwood, CA
  4. 2.4 11km NNE of Napa, CA
  5. 2.1 2km WNW of Vallejo, CA
  6. 2.7 12km NNE of Napa, CA
  7. 1.6 8km NNW of Bay Point, CA
  8. 1.6 14km E of Angwin, CA
  9. 1.5 8km NNW of Bay Point, CA
  10. 2.1 10km NW of Rio Vista, CA
  11. 1.7 14km E of Angwin, CA
  12. 1.9 2km NW of Crockett, CA
  13. 2.1 6km SSW of Yountville, CA
  14. 1.9 4km SE of Rodeo, CA
  15. 3.2 4km SSW of Calistoga, 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.