QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

12km WNW of Rio Vista, CA

· 23 km deep · released about 250 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Solano County 13 kmContra Costa County 34 kmSacramento County 49 kmYolo County 53 kmNapa County 55 kmSan Joaquin County 57 kmAlameda County 63 kmMarin County 83 kmSutter County 92 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 2.6 (md)
Depth
23 km below the surface
Felt
6 reports · strongest reported intensity III
Nearest
Solano County, 13 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3104 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 250 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 61,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 43,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.8× the energy of this one
  4. This earthquake M 2.6 about 250 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 38.2100, -121.8162. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Solano County, CA 13 km (8 mi) ESE of here earthquakes near Solano County
Contra Costa County, CA 34 km (21 mi) NNE of here earthquakes near Contra Costa County
Sacramento County, CA 49 km (30 mi) WSW of here earthquakes near Sacramento County
Yolo County, CA 53 km (33 mi) S of here earthquakes near Yolo County
Napa County, CA 55 km (34 mi) SE of here earthquakes near Napa County
San Joaquin County, CA 57 km (35 mi) WNW of here earthquakes near San Joaquin 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. 2.3 3km N of Rodeo, CA
  2. 2.5 2km ENE of Danville, CA
  3. 1.6 1km SW of Alamo, CA
  4. 1.6 2km NW of Diablo, CA
  5. 2.0 8km N of Pittsburg, CA
  6. 1.9 10km ENE of Yountville, CA
  7. 1.6 3km W of Concord, CA
  8. 1.7 2km E of Danville, CA
  9. 2.4 2km E of Danville, CA
  10. 1.7 2km ESE of Danville, CA
  11. 2.8 2km ESE of Danville, CA
  12. 1.9 3km NE of Orinda, CA
  13. 1.9 3km NE of Orinda, CA
  14. 3.0 2km ESE of Pacheco, CA
  15. 1.8 3km NW 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.