QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

18 km SE of Yosemite Valley, California

· -1.9 km deep · released about 1.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mariposa County 44 kmMadera County 55 kmMono County 57 kmTuolumne County 65 kmFresno County 99 kmAlpine County 115 kmCalaveras County 117 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 3.3 (ml)
Depth
-1.9 km below the surface
Felt
24 reports · strongest reported intensity III
Nearest
Mariposa County, 44 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3516 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 24 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 140,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,600× the energy of this one
  4. This earthquake M 3.3 about 1.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.5× more

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 37.6317, -119.4205. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mariposa County, CA 44 km (27 mi) E of here earthquakes near Mariposa County
Madera County, CA 55 km (34 mi) NNE of here earthquakes near Madera County
Mono County, CA 57 km (36 mi) WSW of here earthquakes near Mono County
Tuolumne County, CA 65 km (40 mi) SE of here earthquakes near Tuolumne County
Fresno County, CA 99 km (62 mi) NNE of here earthquakes near Fresno County
Alpine County, CA 115 km (71 mi) SSE of here earthquakes near Alpine County

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

Aftershocks so far

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

  1. 4.0 4 km ESE of Mammoth Lakes, California
  2. 2.9 4 km ESE of Mammoth Lakes, California
  3. 2.3 1 km ESE of Mammoth Lakes, California
  4. 1.7 8 km ESE of Mammoth Lakes, California
  5. 1.7 1 km ESE of Mammoth Lakes, California
  6. 2.1 1 km ESE of Mammoth Lakes, California
  7. 1.6 15 km SE of Yosemite Valley, California
  8. 1.9 23 km ESE of Yosemite Valley, California
  9. 1.5 23 km ESE of Yosemite Valley, California
  10. 1.6 5 km SSE of Fish Camp, California
  11. 1.6 24 km ESE of Yosemite Valley, California
  12. 2.6 22 km ESE of Yosemite Valley, California
  13. 2.0 23 km ESE of Yosemite Valley, California
  14. 1.9 23 km ESE of Yosemite Valley, California
  15. 1.5 6 km SSE of Fish Camp, California

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.