QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

16km NW of Truckee, CA

· 7.0 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sierra County 25 kmNevada County 44 kmPlacer County 55 kmCarson City 57 kmStorey County 66 kmEl Dorado County 75 kmPlumas County 77 kmDouglas County 84 kmYuba County 92 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 2.1 (md)
Depth
7.0 km below the surface
Felt
no reports yet
Nearest
Sierra County, 25 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2259 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 40 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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 39.4360, -120.2973. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sierra County, CA 25 km (15 mi) SE of here earthquakes near Sierra County
Nevada County, CA 44 km (27 mi) ENE of here earthquakes near Nevada County
Placer County, CA 55 km (34 mi) NE of here earthquakes near Placer County
Carson City, NV 57 km (35 mi) NW of here earthquakes near Carson City
Storey County, NV 66 km (41 mi) W of here earthquakes near Storey County
El Dorado County, CA 75 km (47 mi) NNE of here earthquakes near El Dorado County

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

Aftershocks so far

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

  1. 2.5 9km SE of Dollar Point, CA
  2. 2.4 9km SE of Dollar Point, CA
  3. 2.1 9km SE of Dollar Point, CA
  4. 2.4 9km SE of Dollar Point, CA
  5. 2.5 9km SE of Dollar Point, CA
  6. 2.9 9km SE of Dollar Point, CA
  7. 2.4 9km SE of Dollar Point, CA
  8. 2.8 9km SE of Dollar Point, CA
  9. 3.7 8km SE of Dollar Point, CA
  10. 1.5 6 km S of Cold Springs, Nevada
  11. 2.6 4km W of Tahoe Vista, CA
  12. 2.0 3km WSW of Whitehawk, CA
  13. 1.5 8 km NE of Truckee, California
  14. 1.6 16 km NNW of Truckee, California
  15. 1.5 12 km W of Virginia City, Nevada

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.