QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

7 km SSE of Oakhurst, CA

· 40 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 14 kmMariposa County 43 kmFresno County 57 kmTuolumne County 89 kmMono County 96 kmMerced County 99 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
40 km below the surface
Felt
no reports yet
Nearest
Madera County, 14 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 620 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 37.2703, -119.6063. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 14 km (9 mi) ENE of here earthquakes near Madera County
Mariposa County, CA 43 km (27 mi) SE of here earthquakes near Mariposa County
Fresno County, CA 57 km (35 mi) N of here earthquakes near Fresno County
Tuolumne County, CA 89 km (55 mi) SSE of here earthquakes near Tuolumne County
Mono County, CA 96 km (60 mi) SW of here earthquakes near Mono County
Merced County, CA 99 km (62 mi) E of here earthquakes near Merced County

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

Aftershocks so far

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

  1. 1.8 16 km ESE of Yosemite Valley, CA
  2. 2.4 10 km S of Mariposa, CA
  3. 2.5 3 km SE of Yosemite Lakes, CA
  4. 2.5 2 km WNW of North Fork, CA
  5. 2.1 13 km S of Mariposa, CA
  6. 2.8 9 km SSW of Mariposa, CA
  7. 1.5 16 km ESE of Yosemite Valley, CA
  8. 2.2 9 km SSW of Mariposa, CA
  9. 1.9 6 km SSW of Yosemite Lakes, CA
  10. 1.8 26 km SSW of Mammoth Lakes, CA
  11. 1.8 6 km NNW of Yosemite Lakes, CA
  12. 1.5 14 km SE of Yosemite Valley, CA
  13. 1.8 6 km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  14. 1.8 12 km NNW of Friant, CA
  15. 1.9 5 km E of Yosemite 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.

On USGS

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