QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

3 km SSW of Round Valley, CA

· 6.4 km deep · released about 40 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 63 kmEsmeralda County 96 kmMadera County 103 kmFresno County 116 kmMariposa County 117 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
6.4 km below the surface
Felt
1 report
Nearest
Mono County, 63 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 618 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

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 37.3917, -118.6070. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 63 km (39 mi) SSE of here earthquakes near Mono County
Esmeralda County, NV 96 km (60 mi) WSW of here earthquakes near Esmeralda County
Madera County, CA 103 km (64 mi) ENE of here earthquakes near Madera County
Fresno County, CA 116 km (72 mi) NE of here earthquakes near Fresno County
Mariposa County, CA 117 km (73 mi) E of here earthquakes near Mariposa County
Inyo County, CA 141 km (88 mi) NW of here earthquakes near Inyo County

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. 1.7 14 km W of Deep Springs, CA
  2. 2.5 2 km E of Bishop, CA
  3. 1.8 4 km SE of Bishop, CA
  4. 1.6 4 km S of Bishop, CA
  5. 2.0 18 km WSW of Toms Place, CA
  6. 2.6 14 km W of Toms Place, CA
  7. 1.5 12 km ENE of Round Valley, CA
  8. 2.0 11 km ENE of Round Valley, CA
  9. 1.9 13 km SW of Toms Place, CA
  10. 1.7 14 km W of Toms Place, CA
  11. 2.4 3 km E of Big Pine, CA
  12. 1.9 12 km S of Mammoth Lakes, CA
  13. 2.2 3 km NNW of Dixon Lane-Meadow Creek, CA
  14. 2.6 17 km SSE of Mammoth Lakes, CA
  15. 2.1 12 km WSW of Wilkerson, 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 4.8 on 2016-02-16 — it released about 11,000 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.