QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

12km N of Madera Acres, CA

· 23 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 28 kmMariposa County 51 kmFresno County 53 kmMerced County 61 kmStanislaus County 98 kmTuolumne County 100 kmSan Benito County 109 kmKings County 119 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 2.2 (md)
Depth
23 km below the surface
Felt
no reports yet
Nearest
Madera County, 28 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1575 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 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 37.1265, -120.0423. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 28 km (17 mi) WSW of here earthquakes near Madera County
Mariposa County, CA 51 km (32 mi) SSW of here earthquakes near Mariposa County
Fresno County, CA 53 km (33 mi) NW of here earthquakes near Fresno County
Merced County, CA 61 km (38 mi) E of here earthquakes near Merced County
Stanislaus County, CA 98 km (61 mi) ESE of here earthquakes near Stanislaus County
Tuolumne County, CA 100 km (62 mi) S of here earthquakes near Tuolumne County

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

Aftershocks so far

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

  1. 1.6 12km NNW of Friant, CA
  2. 2.3 21km SSW of Bootjack, CA
  3. 1.8 5km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  4. 1.6 11km SSW of Mariposa, CA
  5. 2.1 11km SSW of Mariposa, CA
  6. 2.0 2km WSW of Oakhurst, CA
  7. 1.9 12km S of Mariposa, CA
  8. 1.6 9km W of Ahwahnee, CA
  9. 2.3 21km SSW of Mariposa, CA
  10. 2.6 5km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  11. 3.4 21km ENE of Le Grand, CA
  12. 2.4 21km S of Mariposa, CA
  13. 2.2 14km SSW of Bootjack, CA
  14. 2.4 21km S of Mariposa, CA
  15. 1.7 11km SSW 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.