QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

4 km E of Round Valley, CA

· 5.2 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 62 kmEsmeralda County 91 kmMadera County 108 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
5.2 km below the surface
Felt
no reports yet
Nearest
Mono County, 62 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 205 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 37.4163, -118.5545. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 62 km (39 mi) SSE of here earthquakes near Mono County
Esmeralda County, NV 91 km (56 mi) WSW of here earthquakes near Esmeralda County
Madera County, CA 108 km (67 mi) ENE of here earthquakes near Madera County
Mariposa County, CA 121 km (75 mi) E of here earthquakes near Mariposa County
Fresno County, CA 122 km (76 mi) NE of here earthquakes near Fresno County
Inyo County, CA 139 km (87 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

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

  1. 1.6 18 km WSW of Toms Place, CA
  2. 1.6 14 km W of Round Valley, CA
  3. 2.3 10 km S of Big Pine, CA
  4. 1.6 10 km W of Wilkerson, CA
  5. 1.7 9 km E of Mammoth Lakes, CA
  6. 1.5 29 km S of Mammoth Lakes, CA
  7. 2.2 16 km WSW of Deep Springs, CA
  8. 2.0 17 km WSW of Deep Springs, CA
  9. 2.6 17 km WSW of Deep Springs, CA
  10. 1.8 16 km SW of Toms Place, CA
  11. 2.4 9 km NE of Big Pine, CA
  12. 1.5 8 km S of Toms Place, CA
  13. 2.0 17 km WSW of Toms Place, CA
  14. 2.4 2 km SSE of Wilkerson, CA
  15. 1.5 14 km N of Dixon Lane-Meadow Creek, 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 10,000 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.