QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

11km NE of Napa, CA

· 13 km deep · released about 62 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Napa County 18 kmSolano County 27 kmYolo County 43 kmContra Costa County 55 kmMarin County 59 kmSonoma County 64 kmSacramento County 76 kmAlameda County 85 kmSutter County 86 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 2.2 (md)
Depth
13 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Napa County, 18 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2974 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 62 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 240,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 170,000× the energy of this one
  3. Around the size people start to feel M 3.0 15× the energy of this one
  4. This earthquake M 2.2 about 62 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 38.3743, -122.2113. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Napa County, CA 18 km (11 mi) SE of here earthquakes near Napa County
Solano County, CA 27 km (16 mi) WNW of here earthquakes near Solano County
Yolo County, CA 43 km (27 mi) SW of here earthquakes near Yolo County
Contra Costa County, CA 55 km (34 mi) NNW of here earthquakes near Contra Costa County
Marin County, CA 59 km (37 mi) NE of here earthquakes near Marin County
Sonoma County, CA 64 km (40 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

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

  1. 1.6 2km ENE of Angwin, CA
  2. 2.2 5km E of Kenwood, CA
  3. 1.9 6km SW of St. Helena, CA
  4. 2.5 4km N of Santa Rosa, CA
  5. 2.7 7km NNE of Bay Point, CA
  6. 2.3 4km N of Santa Rosa, CA
  7. 2.6 6km SSE of Elmira, CA
  8. 1.8 15km E of Angwin, CA
  9. 2.1 6km NE of Penngrove, CA
  10. 3.3 2km NNW of Crockett, CA
  11. 2.2 5km WSW of Yountville, CA
  12. 1.6 6km NE of Penngrove, CA
  13. 2.5 9km N of Bay Point, CA
  14. 1.5 0km SSW of Angwin, CA
  15. 2.2 6km SSW 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.