QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

1 km SSE of Markleeville, California

· 10 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alpine County 7 kmDouglas County 29 kmCarson City 52 kmLyon County 63 kmEl Dorado County 67 kmTuolumne County 75 kmAmador County 81 kmStorey County 87 kmCalaveras County 87 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 2.1 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Alpine County, 7 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1259 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 38.6831, -119.7783. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alpine County, CA 7 km (4 mi) NNE of here earthquakes near Alpine County
Douglas County, NV 29 km (18 mi) SSW of here earthquakes near Douglas County
Carson City, NV 52 km (33 mi) S of here earthquakes near Carson City
Lyon County, NV 63 km (39 mi) SW of here earthquakes near Lyon County
El Dorado County, CA 67 km (41 mi) E of here earthquakes near El Dorado County
Tuolumne County, CA 75 km (47 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

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

  1. 2.5 13 km NE of Walker, California
  2. 2.5 5 km NNW of Walker, CA
  3. 1.5 California-Nevada border region
  4. 2.3 5 km NNW of Walker, CA
  5. 2.7 6 km NNW of Walker, CA
  6. 2.7 5 km NNW of Walker, CA
  7. 2.0 5 km NNW of Walker, CA
  8. 2.1 5 km NNW of Walker, CA
  9. 1.5 2 km S of Coleville, California
  10. 2.3 5 km NNW of Walker, CA
  11. 3.3 5 km NNW of Walker, CA
  12. 2.9 6 km NNW of Walker, CA
  13. 4.2 5 km NNW of Walker, CA
  14. 2.5 18 km NNW of Walker, CA
  15. 2.5 8 km WNW 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 710,000 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.