QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

4 km W of Walker, California

· 6.7 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alpine County 26 kmDouglas County 44 kmLyon County 64 kmTuolumne County 66 kmCarson City 74 kmMono County 87 kmEl Dorado County 92 kmCalaveras County 96 kmMineral County 97 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 1.9 (ml)
Depth
6.7 km below the surface
Felt
no reports yet
Nearest
Alpine County, 26 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1042 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 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 38.5112, -119.5293. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alpine County, CA 26 km (16 mi) ESE of here earthquakes near Alpine County
Douglas County, NV 44 km (28 mi) S of here earthquakes near Douglas County
Lyon County, NV 64 km (40 mi) SSW of here earthquakes near Lyon County
Tuolumne County, CA 66 km (41 mi) NE of here earthquakes near Tuolumne County
Carson City, NV 74 km (46 mi) SSE of here earthquakes near Carson City
Mono County, CA 87 km (54 mi) NW of here earthquakes near Mono 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. 2.7 6 km NNW of Walker, CA
  2. 2.1 3 km NNW of Markleeville, CA
  3. 1.6 13 km E of Topaz, California
  4. 2.9 5 km WNW of Walker, CA
  5. 2.5 5 km NNW of Walker, CA
  6. 1.5 17 km SSE of Walker, California
  7. 2.8 3 km W of Walker, CA
  8. 2.5 5 km W of Walker, CA
  9. 2.2 1 km ESE of Coleville, California
  10. 2.2 7 km WNW of Walker, CA
  11. 1.5 6 km N of Bridgeport, California
  12. 2.2 8 km NE of Markleeville, CA
  13. 2.1 6 km W of Walker, CA
  14. 1.6 2 km SW of Coleville, California
  15. 1.6 1 km WSW of Walker, California

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 1,400,000 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.