QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

3km SSW of American Canyon, CA

· 6.0 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Solano County 32 kmContra Costa County 38 kmNapa County 40 kmMarin County 42 kmAlameda County 64 kmYolo County 68 kmSonoma County 70 kmSan Francisco County 81 kmSan Mateo County 82 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 1.7 (md)
Depth
6.0 km below the surface
Felt
no reports yet
Nearest
Solano County, 32 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2483 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 38.1480, -122.2772. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Solano County, CA 32 km (20 mi) WSW of here earthquakes near Solano County
Contra Costa County, CA 38 km (24 mi) NW of here earthquakes near Contra Costa County
Napa County, CA 40 km (25 mi) S of here earthquakes near Napa County
Marin County, CA 42 km (26 mi) ENE of here earthquakes near Marin County
Alameda County, CA 64 km (40 mi) NNW of here earthquakes near Alameda County
Yolo County, CA 68 km (42 mi) SSW of here earthquakes near Yolo County

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

Aftershocks so far

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

  1. 1.5 0km E of Diablo, CA
  2. 1.5 2km WNW of Concord, CA
  3. 1.6 15km N of Green Valley, CA
  4. 1.7 3km ENE of San Ramon, CA
  5. 1.6 3km NNE of Green Valley, CA
  6. 1.9 2km SE of Pacheco, CA
  7. 2.1 2km NW of Concord, CA
  8. 2.0 6km SSW of Yountville, CA
  9. 1.8 1km ESE of Pacheco, CA
  10. 1.9 2km NNE of San Ramon, CA
  11. 2.2 1km SW of Danville, CA
  12. 1.8 6km NE of Penngrove, CA
  13. 1.9 4km N of Diablo, CA
  14. 1.5 6km ENE of Vallejo, CA
  15. 1.8 14km E of Angwin, 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 13,000 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.