QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

4km SSE of Markleeville, CA

· 1.7 km deep · released about 700 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alpine County 4 kmDouglas County 32 kmCarson City 56 kmLyon County 65 kmEl Dorado County 68 kmTuolumne County 72 kmAmador County 80 kmCalaveras County 85 kmStorey County 90 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 2.9 (md)
Depth
1.7 km below the surface
Felt
9 reports · strongest reported intensity IV
Nearest
Alpine County, 4 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1877 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 9 people have reported feeling it to USGS.

How big was it?

This earthquake released about 700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 15,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 700 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 38.6525, -119.7750. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alpine County, CA 4 km (2 mi) NNE of here earthquakes near Alpine County
Douglas County, NV 32 km (20 mi) SSW of here earthquakes near Douglas County
Carson City, NV 56 km (35 mi) S of here earthquakes near Carson City
Lyon County, NV 65 km (40 mi) SW of here earthquakes near Lyon County
El Dorado County, CA 68 km (42 mi) ESE of here earthquakes near El Dorado County
Tuolumne County, CA 72 km (45 mi) NNE of here earthquakes near Tuolumne County

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

Aftershocks so far

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

  1. 4.4 32km ENE of Dardanelle, CA
  2. 1.9 29km ENE of Dardanelle, CA
  3. 2.6 30km ENE of Dardanelle, CA
  4. 2.6 31km ENE of Dardanelle, CA
  5. 2.9 4km W of Walker, CA
  6. 2.9 31km ENE of Dardanelle, CA
  7. 2.7 31km SE of Markleeville, CA
  8. 1.7 2 km SSE of Coleville, California
  9. 2.4 31km ENE of Dardanelle, CA
  10. 3.9 31km NW of Bridgeport, CA
  11. 3.6 28km SE of Markleeville, CA
  12. 2.3 28km ENE of Dardanelle, CA
  13. 3.0 31km SE of Markleeville, CA
  14. 4.2 29km SE of Markleeville, CA
  15. 2.8 32km SE of Markleeville, 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.