QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

30 km W of Truckee, CA

· 15 km deep · released about 62 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Nevada County 22 kmPlacer County 28 kmSierra County 35 kmEl Dorado County 53 kmCarson City 68 kmYuba County 71 kmPlumas County 86 kmDouglas County 88 kmStorey County 88 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
15 km below the surface
Felt
no reports yet
Nearest
Nevada County, 22 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 647 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 62 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 5.8 240,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 170,000× the energy of this one
  3. Around the size people start to feel M 3.0 15× the energy of this one
  4. This earthquake M 2.2 about 62 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 39.2580, -120.5192. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Nevada County, CA 22 km (14 mi) ESE of here earthquakes near Nevada County
Placer County, CA 28 km (17 mi) NE of here earthquakes near Placer County
Sierra County, CA 35 km (22 mi) S of here earthquakes near Sierra County
El Dorado County, CA 53 km (33 mi) N of here earthquakes near El Dorado County
Carson City, NV 68 km (42 mi) W of here earthquakes near Carson City
Yuba County, CA 71 km (44 mi) E of here earthquakes near Yuba 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. 3.3 9 km NNE of Truckee, CA
  2. 2.5 9 km NNE of Truckee, CA
  3. 2.5 9 km NNE of Truckee, CA
  4. 2.1 9 km NNE of Truckee, CA
  5. 1.9 32 km S of Whitehawk, CA
  6. 1.5 4 km W of Sattley, California
  7. 1.6 1 km W of Sattley, California
  8. 1.8 10 km N of Kings Beach, CA
  9. 2.4 11 km N of Kings Beach, CA
  10. 1.9 10 km N of Kings Beach, CA
  11. 2.4 10 km N of Kings Beach, CA
  12. 2.1 11 km N of Kings Beach, CA
  13. 2.0 19 km S of Johnsville, CA
  14. 1.6 4 km ENE of Dollar Point, CA
  15. 2.0 22 km SSW of Tahoma, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.7 on 2021-05-07 — it released about 4,600 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.