QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

15 km WSW of Esparto, California

· 13 km deep · released about 420 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Napa County 20 kmYolo County 25 kmSolano County 48 kmColusa County 59 kmSutter County 60 kmSonoma County 65 kmLake County 70 kmSacramento County 77 kmMarin County 82 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 2.8 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Napa County, 20 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3337 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 420 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 36,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 26,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.3× the energy of this one
  4. This earthquake M 2.8 about 420 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 38.6468, -122.1898. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Napa County, CA 20 km (12 mi) NE of here earthquakes near Napa County
Yolo County, CA 25 km (16 mi) W of here earthquakes near Yolo County
Solano County, CA 48 km (30 mi) NNW of here earthquakes near Solano County
Colusa County, CA 59 km (37 mi) S of here earthquakes near Colusa County
Sutter County, CA 60 km (38 mi) SW of here earthquakes near Sutter County
Sonoma County, CA 65 km (41 mi) ENE of here earthquakes near Sonoma County

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

Aftershocks so far

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

  1. 1.5 9 km NE of Windsor, California
  2. 2.1 7 km ENE of Fetters Hot Springs-Agua Caliente, California
  3. 1.7 11 km NE of Oakville, California
  4. 1.6 7 km NE of Rohnert Park, California
  5. 1.6 12 km ESE of Hidden Valley Lake, California
  6. 1.8 6 km S of Cobb, California
  7. 2.3 7 km S of Cobb, California
  8. 1.9 4 km SSW of Cobb, California
  9. 2.6 Northern California
  10. 1.8 4 km S of Cobb, California
  11. 1.5 6 km SSE of Cobb, California
  12. 1.8 16 km NNW of Moskowite Corner, California
  13. 2.5 5 km S of Cobb, California
  14. 2.0 5 km S of Cobb, California
  15. 2.6 7 km NE of Rohnert Park, California

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.