QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

10km NNE of Oakhurst, CA

· 43 km deep · released about 1,200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 26 kmMariposa County 33 kmFresno County 72 kmTuolumne County 75 kmMono County 85 kmMerced County 102 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 3.1 (ml)
Depth
43 km below the surface
Felt
195 reports · strongest reported intensity III
Nearest
Madera County, 26 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2817 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 195 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,200 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 290,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,100× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.2× 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 37.4098, -119.6053. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 26 km (16 mi) NNE of here earthquakes near Madera County
Mariposa County, CA 33 km (20 mi) SE of here earthquakes near Mariposa County
Fresno County, CA 72 km (45 mi) N of here earthquakes near Fresno County
Tuolumne County, CA 75 km (47 mi) SSE of here earthquakes near Tuolumne County
Mono County, CA 85 km (53 mi) SW of here earthquakes near Mono County
Merced County, CA 102 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 7km W of Yosemite Lakes, CA
  2. 1.6 7km NNE of Oakhurst, CA
  3. 1.6 18km SSW of Bootjack, CA
  4. 1.9 16km ESE of Yosemite Valley, CA
  5. 2.3 19km WNW of Yosemite Lakes, CA
  6. 1.8 20km SE of Yosemite Valley, CA
  7. 2.1 19km SE of Yosemite Valley, CA
  8. 1.7 10km W of Ahwahnee, CA
  9. 1.6 2km NW of Oakhurst, CA
  10. 2.6 17km SSW of Bootjack, CA
  11. 1.8 17km SSW of Bootjack, CA
  12. 2.1 22km ESE of Yosemite Valley, CA
  13. 2.1 16km SSW of Bootjack, CA
  14. 1.6 17km SSW of Bootjack, CA
  15. 1.9 17km SSW of Bootjack, 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.