QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

10 km SSW of Mariposa, CA

· 17 km deep · released about 24 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mariposa County 21 kmMadera County 30 kmMerced County 68 kmTuolumne County 70 kmFresno County 77 kmStanislaus County 91 kmCalaveras County 101 kmMono County 114 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 1.9 (md)
Depth
17 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Mariposa County, 21 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 858 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 24 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 640,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 450,000× the energy of this one
  3. Around the size people start to feel M 3.0 40× the energy of this one
  4. This earthquake M 1.9 about 24 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 37.3950, -119.9937. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mariposa County, CA 21 km (13 mi) SSW of here earthquakes near Mariposa County
Madera County, CA 30 km (19 mi) NW of here earthquakes near Madera County
Merced County, CA 68 km (42 mi) ENE of here earthquakes near Merced County
Tuolumne County, CA 70 km (43 mi) S of here earthquakes near Tuolumne County
Fresno County, CA 77 km (48 mi) NNW of here earthquakes near Fresno County
Stanislaus County, CA 91 km (57 mi) ESE of here earthquakes near Stanislaus County

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

Aftershocks so far

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

  1. 1.6 6 km E of Bonadelle Ranchos-Madera Ranchos, CA
  2. 2.1 15 km SSW of Bootjack, CA
  3. 1.8 6 km E of Bonadelle Ranchos-Madera Ranchos, CA
  4. 2.0 5 km S of Oakhurst, CA
  5. 2.0 6 km E of Bonadelle Ranchos-Madera Ranchos, CA
  6. 1.9 6 km E of Bonadelle Ranchos-Madera Ranchos, CA
  7. 1.8 18 km SW of Bootjack, CA
  8. 1.6 5 km NE of Oakhurst, CA
  9. 2.1 3 km WNW of Oakhurst, CA
  10. 1.9 4 km W of Oakhurst, CA
  11. 1.6 5 km NE of Oakhurst, CA
  12. 2.2 11 km SSW of Mariposa, CA
  13. 1.8 6 km E of Bonadelle Ranchos-Madera Ranchos, CA
  14. 1.8 6 km E of Bonadelle Ranchos-Madera Ranchos, CA
  15. 1.7 7 km E of Bonadelle Ranchos-Madera Ranchos, 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.