QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

5 km NNW of Walker, CA

· 4.9 km deep · released about 1.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alpine County 27 kmDouglas County 40 kmLyon County 59 kmCarson City 70 kmTuolumne County 71 kmMono County 90 kmEl Dorado County 93 kmMineral County 95 kmStorey 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 3.3 (ml)
Depth
4.9 km below the surface
Felt
18 reports · strongest reported intensity IV
Nearest
Alpine County, 27 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 997 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 18 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,100× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.7× 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 38.5537, -119.5062. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alpine County, CA 27 km (16 mi) ESE of here earthquakes near Alpine County
Douglas County, NV 40 km (25 mi) SSE of here earthquakes near Douglas County
Lyon County, NV 59 km (36 mi) SSW of here earthquakes near Lyon County
Carson City, NV 70 km (43 mi) SSE of here earthquakes near Carson City
Tuolumne County, CA 71 km (44 mi) NE of here earthquakes near Tuolumne County
Mono County, CA 90 km (56 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

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

  1. 1.6 6 km WSW of Walker, California
  2. 1.6 0 km ESE of Coleville, California
  3. 1.5 3 km ENE of Topaz Lake, Nevada
  4. 1.7 11 km SE of Smith, Nevada
  5. 1.9 12 km SE of Smith, Nevada
  6. 1.7 12 km SE of Smith, Nevada
  7. 1.5 6 km SE of Topaz Ranch Estates, Nevada
  8. 1.5 11 km SE of Smith, Nevada
  9. 2.0 11 km SE of Smith, Nevada
  10. 2.4 12 km SE of Smith, Nevada
  11. 1.7 11 km SE of Smith, Nevada
  12. 1.6 11 km SE of Smith, Nevada
  13. 1.5 9 km WNW of Topaz Ranch Estates, Nevada
  14. 1.6 1 km SSW of Coleville, California
  15. 1.6 11 km W of Bridgeport, 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 12,000 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.