QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

3km SSW of Oakhurst, CA

· 24 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 13 kmMariposa County 38 kmFresno County 60 kmTuolumne County 85 kmMerced County 95 kmMono County 97 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 1.8 (md)
Depth
24 km below the surface
Felt
no reports yet
Nearest
Madera County, 13 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3194 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 37.2993, -119.6600. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 13 km (8 mi) NE of here earthquakes near Madera County
Mariposa County, CA 38 km (23 mi) SE of here earthquakes near Mariposa County
Fresno County, CA 60 km (37 mi) N of here earthquakes near Fresno County
Tuolumne County, CA 85 km (53 mi) SSE of here earthquakes near Tuolumne County
Merced County, CA 95 km (59 mi) E of here earthquakes near Merced County
Mono County, CA 97 km (60 mi) SW of here earthquakes near Mono 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. 2.0 10km NW of Yosemite Lakes, CA
  2. 2.6 6km E of Friant, CA
  3. 1.9 17km SE of Yosemite Valley, CA
  4. 1.6 16km SE of Yosemite Valley, CA
  5. 1.7 23km NNE of North Fork, CA
  6. 1.8 4km E of Madera Acres, CA
  7. 1.5 22km SSE of Yosemite Valley, CA
  8. 2.2 16km ESE of Yosemite Valley, CA
  9. 1.6 13km ESE of Yosemite Valley, CA
  10. 1.6 4km ESE of Mariposa, CA
  11. 1.7 17km SE of Yosemite Valley, CA
  12. 2.3 23km ESE of Yosemite Valley, CA
  13. 1.7 15km ESE of Yosemite Valley, CA
  14. 1.8 12km NNW of Yosemite Lakes, CA
  15. 1.5 24km SE of Yosemite 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.