QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

6km WSW of Valley Ranch, CA

· -1.1 km deep · released about 58 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sierra County 17 kmPlumas County 36 kmNevada County 47 kmPlacer County 72 kmYuba County 78 kmButte County 84 kmCarson City 98 kmStorey County 99 kmEl Dorado County 103 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 2.2 (md)
Depth
-1.1 km below the surface
Felt
no reports yet
Nearest
Sierra County, 17 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2762 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 58 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 260,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 58 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 39.7093, -120.6285. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sierra County, CA 17 km (11 mi) NNW of here earthquakes near Sierra County
Plumas County, CA 36 km (22 mi) SSE of here earthquakes near Plumas County
Nevada County, CA 47 km (29 mi) NNE of here earthquakes near Nevada County
Placer County, CA 72 km (45 mi) N of here earthquakes near Placer County
Yuba County, CA 78 km (49 mi) NE of here earthquakes near Yuba County
Butte County, CA 84 km (52 mi) E of here earthquakes near Butte 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. 2.8 17km NNW of Truckee, CA
  2. 2.4 18km NNW of Truckee, CA
  3. 3.7 17km NNW of Truckee, CA
  4. 2.1 8km W of La Porte, CA
  5. 2.3 22km SW of Whitehawk, CA
  6. 2.8 8km WNW of Lake Davis, CA
  7. 1.8 5km ESE of Taylorsville, CA
  8. 1.8 5km ESE of Taylorsville, CA
  9. 1.6 6 km S of Taylorsville, California
  10. 2.0 21km NW of Truckee, CA
  11. 1.6 8km W of La Porte, CA
  12. 2.4 5km SE of Chilcoot-Vinton, CA
  13. 1.5 9 km NNW of Truckee, California
  14. 1.5 16 km SE of Sierraville, California
  15. 2.1 19km W of Truckee, 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.