QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

9 km SW of Aspen Springs, California

· 0.9 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 46 kmMadera County 90 kmMariposa County 98 kmEsmeralda County 107 kmFresno County 112 kmTuolumne County 117 kmMineral County 118 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
0.9 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Mono County, 46 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3331 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

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 37.5040, -118.8022. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 46 km (29 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 98 km (61 mi) E of here earthquakes near Mariposa County
Esmeralda County, NV 107 km (67 mi) WSW of here earthquakes near Esmeralda County
Fresno County, CA 112 km (70 mi) NE of here earthquakes near Fresno County
Tuolumne County, CA 117 km (73 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

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

  1. 2.3 11km SE of Mammoth Lakes, CA
  2. 1.6 11km SE of Mammoth Lakes, CA
  3. 1.5 2 km W of Dixon Lane-Meadow Creek, California
  4. 2.2 14 km SSE of Mammoth Lakes, California
  5. 2.6 2km W of Dixon Lane-Meadow Creek, CA
  6. 2.7 15km SW of Toms Place, CA
  7. 2.2 2 km WNW of Dixon Lane-Meadow Creek, California
  8. 1.9 15km SW of Toms Place, CA
  9. 1.8 15km SW of Toms Place, CA
  10. 1.6 15km SW of Toms Place, CA
  11. 1.8 18km SW of Toms Place, CA
  12. 1.7 18km SW of Toms Place, CA
  13. 2.2 16km SW of Toms Place, CA
  14. 2.2 16km WSW of Toms Place, CA
  15. 2.4 9km SE of Mammoth Lakes, 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 8,500 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.