QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

5km SSW of Glen Ellen, CA

· 11 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Napa County 28 kmMarin County 35 kmSonoma County 39 kmSolano County 54 kmYolo County 69 kmContra Costa County 70 kmSan Francisco County 79 kmLake County 88 kmAlameda County 94 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
11 km below the surface
Felt
no reports yet
Nearest
Napa County, 28 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2725 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 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 38.3285, -122.5568. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Napa County, CA 28 km (18 mi) SW of here earthquakes near Napa County
Marin County, CA 35 km (22 mi) NNE of here earthquakes near Marin County
Sonoma County, CA 39 km (24 mi) SE of here earthquakes near Sonoma County
Solano County, CA 54 km (34 mi) W of here earthquakes near Solano County
Yolo County, CA 69 km (43 mi) SW of here earthquakes near Yolo County
Contra Costa County, CA 70 km (43 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

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

  1. 2.2 6km WSW of Yountville, CA
  2. 2.4 3km SW of Anderson Springs, CA
  3. 1.7 18km E of Angwin, CA
  4. 1.6 3km SE of The Geysers, CA
  5. 1.5 13km E of Angwin, CA
  6. 1.9 12km NNE of Angwin, CA
  7. 1.5 13km ESE of Angwin, CA
  8. 1.7 4km SW of Anderson Springs, CA
  9. 1.5 2km NW of Roseland, CA
  10. 2.3 8km SW of Calistoga, CA
  11. 1.9 4km NNW of Larkfield-Wikiup, CA
  12. 1.9 2km SSE of Crockett, CA
  13. 2.2 3km WSW of American Canyon, CA
  14. 1.9 2km NNW of Crockett, CA
  15. 1.7 7km N of Kenwood, 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.