QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

7km NNE of Inverness, CA

· 7.4 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Marin County 14 kmSonoma County 41 kmSan Francisco County 51 kmNapa County 59 kmSolano County 79 kmContra Costa County 82 kmSan Mateo County 92 kmAlameda County 99 kmYolo County 100 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
7.4 km below the surface
Felt
no reports yet
Nearest
Marin County, 14 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2473 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 38.1595, -122.8337. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Marin County, CA 14 km (9 mi) NNW of here earthquakes near Marin County
Sonoma County, CA 41 km (26 mi) S of here earthquakes near Sonoma County
San Francisco County, CA 51 km (32 mi) NNE of here earthquakes near San Francisco County
Napa County, CA 59 km (37 mi) SW of here earthquakes near Napa County
Solano County, CA 79 km (49 mi) W of here earthquakes near Solano County
Contra Costa County, CA 82 km (51 mi) WNW of here earthquakes near Contra Costa County

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

Aftershocks so far

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

  1. 1.8 5km NNE of Windsor, CA
  2. 2.3 5km NNE of Windsor, CA
  3. 2.0 4km N of Larkfield-Wikiup, CA
  4. 1.7 6km SW of Yountville, CA
  5. 1.6 8km W of Calistoga, CA
  6. 2.1 6km SSW of Yountville, CA
  7. 1.6 6km ESE of Santa Venetia, CA
  8. 1.8 5km NNE of Black Point-Green Point, CA
  9. 1.5 5km N of Kenwood, CA
  10. 1.9 6km WSW of St. Helena, CA
  11. 1.6 4km S of Larkfield-Wikiup, CA
  12. 2.3 6km W of Glen Ellen, CA
  13. 2.6 4km SE of Larkfield-Wikiup, CA
  14. 1.5 8km WNW of Yountville, CA
  15. 1.6 6km ESE of Santa Rosa, 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.