QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

9 km N of Truckee, CA

· 12 km deep · released about 56 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sierra County 33 kmCarson City 48 kmNevada County 50 kmStorey County 58 kmPlacer County 59 kmEl Dorado County 75 kmDouglas County 76 kmPlumas County 84 kmAlpine 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 2.2 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Sierra County, 33 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1049 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 56 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 5.8 270,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 190,000× the energy of this one
  3. Around the size people start to feel M 3.0 17× the energy of this one
  4. This earthquake M 2.2 about 56 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 39.4083, -120.2037. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sierra County, CA 33 km (21 mi) SE of here earthquakes near Sierra County
Carson City, NV 48 km (30 mi) NW of here earthquakes near Carson City
Nevada County, CA 50 km (31 mi) ENE of here earthquakes near Nevada County
Storey County, NV 58 km (36 mi) W of here earthquakes near Storey County
Placer County, CA 59 km (37 mi) NE of here earthquakes near Placer 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

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

  1. 2.0 12 km NNW of Virginia City, Nevada
  2. 2.1 6 km W of Tahoe Vista, CA
  3. 1.5 9 km N of Lemmon Valley, Nevada
  4. 1.7 11 km NNW of Virginia City, Nevada
  5. 1.5 11 km NNW of Virginia City, Nevada
  6. 2.0 11 km NNW of Virginia City, Nevada
  7. 1.6 11 km NNW of Virginia City, Nevada
  8. 3.2 11 km NNW of Virginia City, Nevada
  9. 1.9 11 km NNW of Virginia City, Nevada
  10. 1.9 10 km NNW of Virginia City, Nevada
  11. 2.0 11 km NNW of Virginia City, Nevada
  12. 2.7 11 km NNW of Virginia City, Nevada
  13. 1.9 11 km NNW of Virginia City, Nevada
  14. 2.2 10 km NNW of Virginia City, Nevada
  15. 3.2 11 km NNW 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.7 on 2021-05-07 — it released about 5,100 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.