QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

8km SSE of Rio Vista, CA

· -0.1 km deep · released about 6.2 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Solano County 31 kmContra Costa County 31 kmSan Joaquin County 39 kmSacramento County 49 kmAlameda County 53 kmYolo County 69 kmNapa County 74 kmStanislaus County 83 kmMarin County 94 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 1.5 (md)
Depth
-0.1 km below the surface
Felt
no reports yet
Nearest
Solano County, 31 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3195 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 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 38.0890, -121.6725. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Solano County, CA 31 km (19 mi) SE of here earthquakes near Solano County
Contra Costa County, CA 31 km (19 mi) NE of here earthquakes near Contra Costa County
San Joaquin County, CA 39 km (24 mi) WNW of here earthquakes near San Joaquin County
Sacramento County, CA 49 km (31 mi) SW of here earthquakes near Sacramento County
Alameda County, CA 53 km (33 mi) NNE of here earthquakes near Alameda County
Yolo County, CA 69 km (43 mi) SSE of here earthquakes near Yolo County

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

Aftershocks so far

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

  1. 2.8 2km WSW of Diablo, CA
  2. 3.5 2km ENE of Danville, CA
  3. 3.4 2km ENE of Danville, CA
  4. 1.5 2km SW of Diablo, CA
  5. 1.6 2km E of Danville, CA
  6. 3.3 2km ENE of Danville, CA
  7. 1.6 1km WNW of Diablo, CA
  8. 1.9 2km WSW of Diablo, CA
  9. 2.8 2km WSW of Diablo, CA
  10. 2.0 2km WSW of Diablo, CA
  11. 1.7 2km W of Diablo, CA
  12. 2.1 2km WSW of Diablo, CA
  13. 1.7 2km WSW of Diablo, CA
  14. 2.6 2km W of Diablo, CA
  15. 2.1 2km W of Diablo, 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.