QuakeIndex

Earthquake · automatic estimate, may change

M 2.4md

7 km S of Temelec, CA

· 19 km deep · released about 110 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Marin County 29 kmNapa County 36 kmSolano County 48 kmSonoma County 52 kmContra Costa County 56 kmSan Francisco County 72 kmYolo County 73 kmAlameda County 80 kmSan Mateo County 89 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 2.4 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Marin County, 29 km SW
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 868 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 110 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 140,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 99,000× the energy of this one
  3. Around the size people start to feel M 3.0 8.8× the energy of this one
  4. This earthquake M 2.4 about 110 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 38.2072, -122.4818. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Marin County, CA 29 km (18 mi) NE of here earthquakes near Marin County
Napa County, CA 36 km (22 mi) SSW of here earthquakes near Napa County
Solano County, CA 48 km (30 mi) W of here earthquakes near Solano County
Sonoma County, CA 52 km (33 mi) SE of here earthquakes near Sonoma County
Contra Costa County, CA 56 km (35 mi) NW of here earthquakes near Contra Costa County
San Francisco County, CA 72 km (45 mi) NE of here earthquakes near San Francisco County

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

Aftershocks so far

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

  1. 1.8 1 km ESE of El Cerrito, CA
  2. 1.8 11 km SSE of Suisun City, CA
  3. 1.5 5 km E of Vallejo, CA
  4. 2.4 4 km ESE of El Sobrante, CA
  5. 2.1 7 km S of Calistoga, CA
  6. 1.7 6 km SSW of Calistoga, CA
  7. 1.9 9 km E of Vallejo, CA
  8. 1.6 8 km S of Calistoga, CA
  9. 2.0 11 km SSE of Suisun City, CA
  10. 2.5 1 km S of Inverness, CA
  11. 1.6 11 km SSE of Suisun City, CA
  12. 2.0 11 km SSE of Suisun City, CA
  13. 1.7 11 km SSE of Suisun City, CA
  14. 2.6 11 km SSE of Suisun City, CA
  15. 1.6 11 km SSE of Suisun City, 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 1,400 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.