QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

14 km NW of Moskowite Corner, California

· 5.3 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Napa County 6 kmYolo County 36 kmSolano County 44 kmSonoma County 56 kmMarin County 69 kmColusa County 70 kmLake County 74 kmSutter County 74 kmContra Costa County 76 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 1.9 (md)
Depth
5.3 km below the surface
Felt
no reports yet
Nearest
Napa County, 6 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3348 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 38.5522, -122.2852. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Napa County, CA 6 km (4 mi) NE of here earthquakes near Napa County
Yolo County, CA 36 km (22 mi) WSW of here earthquakes near Yolo County
Solano County, CA 44 km (27 mi) NW of here earthquakes near Solano County
Sonoma County, CA 56 km (35 mi) E of here earthquakes near Sonoma County
Marin County, CA 69 km (43 mi) NE of here earthquakes near Marin County
Colusa County, CA 70 km (43 mi) S of here earthquakes near Colusa County

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

Aftershocks so far

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

  1. 1.8 1km SSW of Anderson Springs, CA
  2. 1.7 1km NNW of The Geysers, CA
  3. 1.9 14 km WSW of Esparto, California
  4. 1.7 2km NNW of The Geysers, CA
  5. 1.5 5 km S of Cobb, California
  6. 1.8 7 km ENE of Napa, California
  7. 1.6 5 km SW of Cobb, California
  8. 1.7 4 km SSW of Cobb, California
  9. 2.3 4 km SSW of Cobb, California
  10. 1.9 5 km SSW of Cobb, California
  11. 2.3 6 km N of Kenwood, California
  12. 1.6 4km SSW of Anderson Springs, CA
  13. 1.6 1km NNE of The Geysers, CA
  14. 2.6 4km SW of Anderson Springs, CA
  15. 1.6 2 km SW of American Canyon, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.2 on 2017-02-21 — it released about 2,100 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.