QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

6km SSE of Markleeville, CA

· -1.3 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alpine County 3 kmDouglas County 33 kmCarson City 57 kmLyon County 66 kmEl Dorado County 68 kmTuolumne County 70 kmAmador County 79 kmCalaveras County 84 kmStorey 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 3.1 (ml)
Depth
-1.3 km below the surface
Felt
5 reports · strongest reported intensity III
Nearest
Alpine County, 3 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1156 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 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 6.7 270,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,500× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.3× 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 38.6377, -119.7770. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alpine County, CA 3 km (2 mi) NE of here earthquakes near Alpine County
Douglas County, NV 33 km (21 mi) SSW of here earthquakes near Douglas County
Carson City, NV 57 km (36 mi) S of here earthquakes near Carson City
Lyon County, NV 66 km (41 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 70 km (44 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

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

  1. 2.3 8 km WNW of Walker, CA
  2. 2.4 5 km NNW of Walker, CA
  3. 1.5 4 km SE of Topaz Ranch Estates, Nevada
  4. 1.7 1 km SSE of Coleville, California
  5. 2.5 13 km NE of Walker, California
  6. 2.5 5 km NNW of Walker, CA
  7. 1.5 California-Nevada border region
  8. 2.3 5 km NNW of Walker, CA
  9. 2.7 6 km NNW of Walker, CA
  10. 2.7 5 km NNW of Walker, CA
  11. 2.0 5 km NNW of Walker, CA
  12. 2.1 5 km NNW of Walker, CA
  13. 1.5 2 km S of Coleville, California
  14. 2.3 5 km NNW of Walker, CA
  15. 3.3 5 km NNW of Walker, 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 6.0 on 2021-07-08 — it released about 24,000 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.