QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

1km S of Green Valley, CA

· 9.7 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Solano County 20 kmNapa County 32 kmContra Costa County 41 kmYolo County 53 kmMarin County 55 kmAlameda County 70 kmSonoma County 74 kmSacramento County 75 kmSan Joaquin County 85 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
9.7 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Solano County, 20 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1194 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 5.4 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 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 38.2452, -122.1620. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Solano County, CA 20 km (12 mi) W of here earthquakes near Solano County
Napa County, CA 32 km (20 mi) SSE of here earthquakes near Napa County
Contra Costa County, CA 41 km (25 mi) NNW of here earthquakes near Contra Costa County
Yolo County, CA 53 km (33 mi) SSW of here earthquakes near Yolo County
Marin County, CA 55 km (34 mi) ENE of here earthquakes near Marin County
Alameda County, CA 70 km (43 mi) NNW of here earthquakes near Alameda County

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

Aftershocks so far

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

  1. 2.5 3 km NNW of Piedmont, CA
  2. 1.6 11 km ENE of Yountville, CA
  3. 1.8 6 km ESE of Santa Venetia, CA
  4. 1.5 6 km NNE of Orinda, CA
  5. 1.8 11 km E of Yountville, CA
  6. 2.2 1 km NW of Green Valley, CA
  7. 2.4 4 km W of Glen Ellen, CA
  8. 1.6 7 km WNW of Yountville, CA
  9. 1.8 3 km WNW of Boyes Hot Springs, CA
  10. 2.3 8 km ENE of Kenwood, CA
  11. 1.8 6 km NE of Kenwood, CA
  12. 2.2 2 km NW of Concord, CA
  13. 1.8 10 km ESE of Black Point-Green Point, CA
  14. 1.8 1 km ENE of Pittsburg, CA
  15. 1.8 3 km WNW of Concord, 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 28,000 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.