QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

27km ENE of Dardanelle, CA

· 5.2 km deep · released about 52 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alpine County 31 kmDouglas County 54 kmTuolumne County 58 kmLyon County 73 kmMono County 81 kmCarson City 83 kmCalaveras County 92 kmEl Dorado County 95 kmAmador 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 2.2 (md)
Depth
5.2 km below the surface
Felt
no reports yet
Nearest
Alpine County, 31 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1833 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 52 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 290,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 200,000× the energy of this one
  3. Around the size people start to feel M 3.0 18× the energy of this one
  4. This earthquake M 2.2 about 52 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 38.4267, -119.5433. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Alpine County, CA 31 km (19 mi) SE of here earthquakes near Alpine County
Douglas County, NV 54 km (33 mi) S of here earthquakes near Douglas County
Tuolumne County, CA 58 km (36 mi) NE of here earthquakes near Tuolumne County
Lyon County, NV 73 km (45 mi) SSW of here earthquakes near Lyon County
Mono County, CA 81 km (51 mi) NW of here earthquakes near Mono County
Carson City, NV 83 km (51 mi) SSE of here earthquakes near Carson City

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.3 28km SE of Markleeville, CA
  2. 1.5 28km SE of Markleeville, CA
  3. 1.8 28km SE of Markleeville, CA
  4. 2.7 6km WNW of Walker, CA
  5. 1.9 28km SE of Markleeville, CA
  6. 2.2 33km SE of Markleeville, CA
  7. 1.7 31km S of Smith Valley, NV
  8. 1.6 30km S of Smith Valley, NV
  9. 2.2 28km SE of Markleeville, CA
  10. 2.9 30km S of Smith Valley, NV
  11. 2.3 30km S of Smith Valley, NV
  12. 1.6 11 km SSE of Bridgeport, California
  13. 1.6 3 km SSW of Coleville, California
  14. 1.5 30km SSW of Smith Valley, NV
  15. 1.6 30km S of Smith Valley, NV

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 580,000 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.