QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

3km NNE of Green Valley, CA

· 10 km deep · released about 8.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Solano County 19 kmNapa County 30 kmContra Costa County 43 kmYolo County 50 kmMarin County 58 kmSonoma County 73 kmSacramento County 73 kmAlameda County 73 kmSan Joaquin County 86 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 1.6 (md)
Depth
10 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Solano County, 19 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2375 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 8.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 38.2773, -122.1522. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Solano County, CA 19 km (12 mi) W of here earthquakes near Solano County
Napa County, CA 30 km (18 mi) SSE of here earthquakes near Napa County
Contra Costa County, CA 43 km (27 mi) NNW of here earthquakes near Contra Costa County
Yolo County, CA 50 km (31 mi) SSW of here earthquakes near Yolo County
Marin County, CA 58 km (36 mi) ENE of here earthquakes near Marin County
Sonoma County, CA 73 km (45 mi) ESE of here earthquakes near Sonoma County

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

Aftershocks so far

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

  1. 1.9 13km ENE of Yountville, CA
  2. 2.6 6km SW of Clayton, CA
  3. 1.9 7km WSW of Kenwood, CA
  4. 2.5 6km NE of Alamo, CA
  5. 1.6 5km E of Vallejo, CA
  6. 2.5 6km W of Yountville, CA
  7. 1.9 6km NE of Alamo, CA
  8. 2.0 7km WSW of Kenwood, CA
  9. 2.0 3km SW of American Canyon, CA
  10. 1.5 12km E of Yountville, CA
  11. 1.6 12km E of Angwin, CA
  12. 1.8 1km WNW of Kensington, CA
  13. 1.8 7km N of Orinda, CA
  14. 1.9 5km ENE of Vallejo, CA
  15. 1.5 12km NE of Yountville, 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 17,000 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.