QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

9km NNE of Oakhurst, CA

· 46 km deep · released about 74 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 24 kmMariposa County 33 kmFresno County 71 kmTuolumne County 76 kmMono County 86 kmMerced County 101 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 2.3 (md)
Depth
46 km below the surface
Felt
no reports yet
Nearest
Madera County, 24 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2634 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 74 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 13× the energy of this one
  4. This earthquake M 2.3 about 74 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 37.3975, -119.6057. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 24 km (15 mi) NNE of here earthquakes near Madera County
Mariposa County, CA 33 km (21 mi) SE of here earthquakes near Mariposa County
Fresno County, CA 71 km (44 mi) N of here earthquakes near Fresno County
Tuolumne County, CA 76 km (47 mi) SSE of here earthquakes near Tuolumne County
Mono County, CA 86 km (54 mi) SW of here earthquakes near Mono County
Merced County, CA 101 km (63 mi) ENE 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. 1.9 30km NE of Oakhurst, CA
  2. 1.5 2km S of Oakhurst, CA
  3. 2.0 18km SSW of Bootjack, CA
  4. 1.6 21km SSW of Bootjack, CA
  5. 2.0 14km E of North Fork, CA
  6. 1.8 5km WSW of Oakhurst, CA
  7. 2.1 7km SSE of Shaver Lake, CA
  8. 2.0 5km ESE of Yosemite Lakes, CA
  9. 2.0 8km WSW of Mariposa, CA
  10. 1.6 20km SE of Yosemite Valley, CA
  11. 2.8 10km N of North Fork, CA
  12. 1.9 14km SSW of Bootjack, CA
  13. 1.6 7km ESE of Coarsegold, CA
  14. 1.9 24km SE of Yosemite Valley, CA
  15. 2.3 6km S of Shaver Lake, 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.