QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

4 km WNW of Moskowite Corner, California

· 13 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Napa County 9 kmSolano County 34 kmYolo County 39 kmSonoma County 60 kmMarin County 63 kmContra Costa County 65 kmSacramento County 78 kmSutter County 80 kmColusa County 81 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 1.9 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Napa County, 9 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3447 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 18 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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 38.4532, -122.2448. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Napa County, CA 9 km (6 mi) SE of here earthquakes near Napa County
Solano County, CA 34 km (21 mi) NW of here earthquakes near Solano County
Yolo County, CA 39 km (24 mi) SW of here earthquakes near Yolo County
Sonoma County, CA 60 km (37 mi) E of here earthquakes near Sonoma County
Marin County, CA 63 km (39 mi) NE of here earthquakes near Marin County
Contra Costa County, CA 65 km (40 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

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

  1. 1.6 7 km WNW of Napa, California
  2. 2.5 7 km S of Calistoga, California
  3. 1.8 8 km SSW of Dunnigan, California
  4. 1.7 7 km SSW of Dunnigan, California
  5. 2.0 6 km SW of Dunnigan, California
  6. 2.5 6 km SW of Dunnigan, California
  7. 1.6 10 km W of Esparto, California
  8. 2.0 6 km SW of Dunnigan, California
  9. 2.6 13 km E of Angwin, California
  10. 1.6 4 km WSW of Rutherford, California
  11. 2.6 5 km S of Monument Hills, California
  12. 1.9 13 km ESE of Hidden Valley Lake, California
  13. 2.0 11 km NNW of Pittsburg, California
  14. 1.9 12 km NNE of Bay Point, California
  15. 2.1 10 km N of Bay Point, California

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.