QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

14 km W of Round Valley, CA

· 11 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 61 kmMadera County 90 kmMariposa County 105 kmFresno County 105 kmEsmeralda 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
11 km below the surface
Felt
no reports yet
Nearest
Mono County, 61 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 467 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 37 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 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 37.3772, -118.7515. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 61 km (38 mi) S of here earthquakes near Mono County
Madera County, CA 90 km (56 mi) ENE of here earthquakes near Madera County
Mariposa County, CA 105 km (65 mi) ESE of here earthquakes near Mariposa County
Fresno County, CA 105 km (66 mi) NE of here earthquakes near Fresno County
Esmeralda County, NV 108 km (67 mi) WSW of here earthquakes near Esmeralda County
Tuolumne County, CA 129 km (80 mi) ESE of here earthquakes near Tuolumne 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. 2.6 23 km SW of Toms Place, CA
  2. 2.3 16 km SW of Toms Place, CA
  3. 1.9 14 km SE of Mammoth Lakes, CA
  4. 1.6 14 km SE of Mammoth Lakes, CA
  5. 1.5 17 km WSW of Toms Place, CA
  6. 2.6 22 km SW of Toms Place, CA
  7. 1.6 5 km E of Round Valley, CA
  8. 2.1 16 km N of Dixon Lane-Meadow Creek, CA
  9. 2.0 10 km WSW of Toms Place, CA
  10. 1.9 12 km SSE of Mammoth Lakes, CA
  11. 2.0 4 km ENE of Round Valley, CA
  12. 2.0 17 km SW of Round Valley, CA
  13. 2.3 22 km SW of Toms Place, CA
  14. 2.5 18 km WSW of Big Pine, CA
  15. 1.6 18 km WSW of Big Pine, 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 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.