QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

6km WNW of Walker, CA

· 5.3 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alpine County 24 kmDouglas County 41 kmLyon County 61 kmTuolumne County 69 kmCarson City 70 kmEl Dorado County 91 kmMono County 91 kmCalaveras County 97 kmMineral County 98 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 (md)
Depth
5.3 km below the surface
Felt
no reports yet
Nearest
Alpine County, 24 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1803 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 40 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 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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 38.5447, -119.5375. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alpine County, CA 24 km (15 mi) ESE of here earthquakes near Alpine County
Douglas County, NV 41 km (25 mi) S of here earthquakes near Douglas County
Lyon County, NV 61 km (38 mi) SSW of here earthquakes near Lyon County
Tuolumne County, CA 69 km (43 mi) NNE of here earthquakes near Tuolumne County
Carson City, NV 70 km (44 mi) SSE of here earthquakes near Carson City
El Dorado County, CA 91 km (56 mi) ESE of here earthquakes near El Dorado 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. 1.6 3km SW of Walker, CA
  2. 1.6 7km WNW of Walker, CA
  3. 1.6 6km NNE of Walker, CA
  4. 1.6 5km NNE of Walker, CA
  5. 1.6 6km SW of Walker, CA
  6. 1.5 4 km E of Walker, California
  7. 2.2 6km NW of Walker, CA
  8. 2.2 7km NW of Walker, CA
  9. 1.5 7km NW of Walker, CA
  10. 1.7 5km NW of Walker, CA
  11. 1.7 6km NW of Walker, CA
  12. 1.8 6km SSW of Walker, CA
  13. 2.5 1km NW of Walker, CA
  14. 2.1 4km W of Walker, CA
  15. 1.5 9km ESE 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 760,000 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.