QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

17km NE of Midpines, CA

· 24 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mariposa County 15 kmTuolumne County 46 kmMadera County 48 kmMono County 84 kmCalaveras County 92 kmMerced County 98 kmFresno County 99 kmAlpine County 109 kmStanislaus County 109 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
24 km below the surface
Felt
no reports yet
Nearest
Mariposa County, 15 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1552 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 37 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 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 37.6425, -119.7682. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mariposa County, CA 15 km (9 mi) ENE of here earthquakes near Mariposa County
Tuolumne County, CA 46 km (28 mi) SSE of here earthquakes near Tuolumne County
Madera County, CA 48 km (30 mi) N of here earthquakes near Madera County
Mono County, CA 84 km (52 mi) WSW of here earthquakes near Mono County
Calaveras County, CA 92 km (57 mi) SE of here earthquakes near Calaveras County
Merced County, CA 98 km (61 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

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

  1. 2.6 20km ESE of Yosemite Valley, CA
  2. 2.2 19km ESE of Yosemite Valley, CA
  3. 1.8 19km ESE of Yosemite Valley, CA
  4. 1.6 21km ESE of Yosemite Valley, CA
  5. 2.2 20km ESE of Yosemite Valley, CA
  6. 2.0 5km NE of Oakhurst, CA
  7. 2.6 8km W of Ahwahnee, CA
  8. 1.5 19km SE of Yosemite Valley, CA
  9. 2.2 16km SSW of Yosemite Village, CA
  10. 1.8 32km NE of North Fork, CA
  11. 1.5 32km SW of Mammoth Lakes, CA
  12. 2.2 20km SSW of Mariposa, CA
  13. 1.9 14km S of Mariposa, CA
  14. 2.0 10km S of Mariposa, CA
  15. 1.8 11km S of Mariposa, 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.