QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

1km SW of Mariposa, CA

· 25 km deep · released about 20 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mariposa County 12 kmMadera County 36 kmTuolumne County 60 kmMerced County 73 kmFresno County 85 kmStanislaus County 91 kmCalaveras County 94 kmMono County 108 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
25 km below the surface
Felt
no reports yet
Nearest
Mariposa County, 12 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1933 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 20 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 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 37.4792, -119.9757. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mariposa County, CA 12 km (7 mi) SSW of here earthquakes near Mariposa County
Madera County, CA 36 km (22 mi) NNW of here earthquakes near Madera County
Tuolumne County, CA 60 km (37 mi) S of here earthquakes near Tuolumne County
Merced County, CA 73 km (46 mi) ENE of here earthquakes near Merced County
Fresno County, CA 85 km (53 mi) NNW of here earthquakes near Fresno County
Stanislaus County, CA 91 km (57 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

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

  1. 2.1 17km SSW of Mariposa, CA
  2. 2.1 6km ESE of Coarsegold, CA
  3. 1.7 8km SSE of Bootjack, CA
  4. 2.1 20km ENE of Le Grand, CA
  5. 2.5 21km S of Mariposa, CA
  6. 2.1 17km NE of Midpines, CA
  7. 1.9 18km E of Groveland-Big Oak Flat, CA
  8. 1.7 11km ENE of Midpines, CA
  9. 1.9 14km ENE of Midpines, CA
  10. 1.9 16km ENE of Midpines, CA
  11. 2.2 12km N of Madera Acres, CA
  12. 1.8 8km NE of Ahwahnee, CA
  13. 2.2 3km SE of Yosemite Lakes, CA
  14. 2.4 21km S of Mariposa, CA
  15. 2.2 21km ENE of Le Grand, 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.