QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

27km SSW of Mammoth Lakes, CA

· 5.6 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 59 kmMadera County 64 kmMariposa County 77 kmFresno County 89 kmTuolumne County 105 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
5.6 km below the surface
Felt
no reports yet
Nearest
Mono County, 59 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2771 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 51 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 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 37.4032, -119.0627. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 59 km (37 mi) SSW of here earthquakes near Mono County
Madera County, CA 64 km (40 mi) ENE of here earthquakes near Madera County
Mariposa County, CA 77 km (48 mi) ESE of here earthquakes near Mariposa County
Fresno County, CA 89 km (55 mi) NE of here earthquakes near Fresno County
Tuolumne County, CA 105 km (65 mi) SE of here earthquakes near Tuolumne County

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

Aftershocks so far

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

  1. 1.7 6km ESE of Round Valley, CA
  2. 2.1 6km SE of Mammoth Lakes, CA
  3. 2.6 6km SE of Round Valley, CA
  4. 2.0 14km SE of Mammoth Lakes, CA
  5. 1.7 27km WSW of Wilkerson, CA
  6. 1.8 27km WSW of Wilkerson, CA
  7. 1.7 11km ESE of Mammoth Lakes, CA
  8. 2.2 11km E of Mammoth Lakes, CA
  9. 2.1 6km ESE of Round Valley, CA
  10. 1.8 13km SW of Toms Place, CA
  11. 1.8 6km SE of Round Valley, CA
  12. 1.8 6km SE of Round Valley, CA
  13. 2.7 6km SE of Round Valley, CA
  14. 1.7 7km SE of Round Valley, CA
  15. 2.1 6km SE of Round Valley, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.