QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

7 km ENE of Rohnert Park, CA

· 6.4 km deep · released about 74 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sonoma County 30 kmNapa County 31 kmMarin County 37 kmSolano County 62 kmYolo County 73 kmContra Costa County 78 kmSan Francisco County 80 kmLake County 82 kmColusa County 96 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 2.3 (md)
Depth
6.4 km below the surface
Felt
5 reports · strongest reported intensity III
Nearest
Sonoma County, 30 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 24 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 74 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 13× the energy of this one
  4. This earthquake M 2.3 about 74 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 38.3728, -122.6388. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sonoma County, CA 30 km (19 mi) SE of here earthquakes near Sonoma County
Napa County, CA 31 km (19 mi) WSW of here earthquakes near Napa County
Marin County, CA 37 km (23 mi) NNE of here earthquakes near Marin County
Solano County, CA 62 km (39 mi) W of here earthquakes near Solano County
Yolo County, CA 73 km (45 mi) WSW of here earthquakes near Yolo County
Contra Costa County, CA 78 km (49 mi) NW 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

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

  1. 1.9 3 km NW of The Geysers, CA
  2. 1.9 3 km NNW of The Geysers, CA
  3. 1.5 3 km of The Geysers, CA
  4. 1.7 3 km W of Kenwood, CA
  5. 2.7 7 km W of Kenwood, CA
  6. 1.7 3 km NNE of Saint Helena, CA
  7. 1.9 3 km of Larkfield-Wikiup, CA
  8. 1.6 2 km ESE of The Geysers, CA
  9. 1.9 8 km ENE of Larkfield-Wikiup, CA
  10. 1.6 8 km ENE of Larkfield-Wikiup, CA
  11. 1.8 4 km SSW of Anderson Springs, CA
  12. 2.2 4 km SW of Anderson Springs, CA
  13. 2.0 4 km SW of Anderson Springs, CA
  14. 1.6 4 km SSW of Anderson Springs, CA
  15. 1.6 4 km SW of Anderson Springs, 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 2023-06-03 — it released about 1,900 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.