QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

19km NW of Truckee, CA

· 9.4 km deep · released about 1,500 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sierra County 22 kmNevada County 43 kmPlacer County 57 kmCarson City 60 kmStorey County 68 kmPlumas County 73 kmEl Dorado County 78 kmDouglas County 87 kmYuba County 91 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 3.1 (ml)
Depth
9.4 km below the surface
Felt
163 reports · strongest reported intensity IV
Nearest
Sierra County, 22 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1892 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 163 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,500 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 220,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,900× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× more

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 39.4648, -120.3168. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sierra County, CA 22 km (13 mi) SE of here earthquakes near Sierra County
Nevada County, CA 43 km (27 mi) ENE of here earthquakes near Nevada County
Placer County, CA 57 km (35 mi) NE of here earthquakes near Placer County
Carson City, NV 60 km (37 mi) NW of here earthquakes near Carson City
Storey County, NV 68 km (42 mi) W of here earthquakes near Storey County
Plumas County, CA 73 km (45 mi) SE of here earthquakes near Plumas 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. 2.0 19km SW of Loyalton, CA
  2. 3.3 24km WNW of Truckee, CA
  3. 2.9 10km SE of Dollar Point, CA
  4. 2.5 19km NW of Truckee, CA
  5. 1.8 0 km S of Lake Davis, California
  6. 2.1 9km SE of Dollar Point, CA
  7. 2.0 9km SE of Dollar Point, CA
  8. 2.5 9km SE of Dollar Point, CA
  9. 1.9 10km SE of Dollar Point, CA
  10. 1.9 10km SE of Dollar Point, CA
  11. 1.9 10km SE of Dollar Point, CA
  12. 2.0 10km SE of Dollar Point, CA
  13. 2.3 10km SE of Dollar Point, CA
  14. 2.4 9km SE of Dollar Point, CA
  15. 2.3 9km SE of Dollar Point, 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.