QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0md

3 km SSE of Vacaville, CA

· 21 km deep · released about 33 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Solano County 8 kmNapa County 37 kmYolo County 39 kmContra Costa County 46 kmSacramento County 56 kmMarin County 75 kmSan Joaquin County 75 kmAlameda County 76 kmSutter 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 2.0 (md)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Solano County, 8 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 978 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 33 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 5.8 450,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 320,000× the energy of this one
  3. Around the size people start to feel M 3.0 29× the energy of this one
  4. This earthquake M 2.0 about 33 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 38.3335, -121.9698. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Solano County, CA 8 km (5 mi) NNW of here earthquakes near Solano County
Napa County, CA 37 km (23 mi) ESE of here earthquakes near Napa County
Yolo County, CA 39 km (24 mi) S of here earthquakes near Yolo County
Contra Costa County, CA 46 km (29 mi) N of here earthquakes near Contra Costa County
Sacramento County, CA 56 km (35 mi) WSW of here earthquakes near Sacramento County
Marin County, CA 75 km (46 mi) ENE of here earthquakes near Marin County

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

Aftershocks so far

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

  1. 1.5 5 km E of Vallejo, CA
  2. 1.6 16 km NE of Napa, CA
  3. 2.5 4 km SW of Antioch, CA
  4. 2.1 4 km SW of Antioch, CA
  5. 2.4 7 km S of Temelec, CA
  6. 1.5 5 km E of Vallejo, CA
  7. 1.7 8 km E of Angwin, CA
  8. 2.3 7 km E of Angwin, CA
  9. 1.7 5 km E of Vallejo, CA
  10. 1.6 6 km ENE of Vallejo, CA
  11. 1.5 6 km E of Walnut Creek, CA
  12. 1.6 14 km NNE of Napa, CA
  13. 1.7 1 km W of Pacheco, CA
  14. 2.0 10 km ESE of Clayton, CA
  15. 1.5 3 km NE of Saint Helena, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.5 on 2019-10-15 — it released about 4,400 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.