QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

10 km NW of Auberry, CA

· 23 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 18 kmFresno County 40 kmMariposa County 59 kmMerced County 101 kmTuolumne County 106 kmMono County 109 kmKings County 118 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 1.8 (md)
Depth
23 km below the surface
Felt
no reports yet
Nearest
Madera County, 18 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 818 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 37.1142, -119.5858. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 18 km (11 mi) SE of here earthquakes near Madera County
Fresno County, CA 40 km (25 mi) N of here earthquakes near Fresno County
Mariposa County, CA 59 km (36 mi) SSE of here earthquakes near Mariposa County
Merced County, CA 101 km (63 mi) E of here earthquakes near Merced County
Tuolumne County, CA 106 km (66 mi) SSE of here earthquakes near Tuolumne County
Mono County, CA 109 km (68 mi) SW of here earthquakes near Mono County

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

Aftershocks so far

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

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