QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

12km WNW of Midpines, CA

· 26 km deep · released about 47 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mariposa County 12 kmMadera County 48 kmTuolumne County 50 kmMerced County 73 kmCalaveras County 82 kmStanislaus County 84 kmFresno County 97 kmMono County 110 kmAmador County 110 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
26 km below the surface
Felt
no reports yet
Nearest
Mariposa County, 12 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1977 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 47 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 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 37.5740, -120.0510. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mariposa County, CA 12 km (8 mi) W of here earthquakes near Mariposa County
Madera County, CA 48 km (30 mi) NNW of here earthquakes near Madera County
Tuolumne County, CA 50 km (31 mi) S of here earthquakes near Tuolumne County
Merced County, CA 73 km (45 mi) NE of here earthquakes near Merced County
Calaveras County, CA 82 km (51 mi) SSE of here earthquakes near Calaveras County
Stanislaus County, CA 84 km (52 mi) E of here earthquakes near Stanislaus County

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

Aftershocks so far

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

  1. 2.3 21km SSW of Bootjack, CA
  2. 2.4 10km SSW of Mariposa, CA
  3. 1.6 22km SSW of Bootjack, CA
  4. 2.3 21km S of Mariposa, CA
  5. 2.3 21km S of Mariposa, CA
  6. 1.7 22km SSW of Bootjack, CA
  7. 1.8 12km NW of Yosemite Lakes, CA
  8. 1.7 22km ENE of Le Grand, CA
  9. 3.0 19km SSW of Mariposa, CA
  10. 2.3 21km S of Mariposa, CA
  11. 2.8 14km ENE of Midpines, CA
  12. 2.1 17km SSW of Mariposa, CA
  13. 1.7 8km SSE of Bootjack, CA
  14. 2.1 20km ENE of Le Grand, CA
  15. 2.5 21km 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.