QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

12km S of Bootjack, CA

· 29 km deep · released about 9.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 20 kmMariposa County 25 kmFresno County 69 kmTuolumne County 75 kmMerced County 77 kmStanislaus County 102 kmMono County 108 kmCalaveras County 111 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 1.7 (md)
Depth
29 km below the surface
Felt
no reports yet
Nearest
Madera County, 20 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1879 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 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 37.3527, -119.8782. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 20 km (12 mi) NW of here earthquakes near Madera County
Mariposa County, CA 25 km (15 mi) S of here earthquakes near Mariposa County
Fresno County, CA 69 km (43 mi) NNW of here earthquakes near Fresno County
Tuolumne County, CA 75 km (46 mi) S of here earthquakes near Tuolumne County
Merced County, CA 77 km (48 mi) ENE of here earthquakes near Merced County
Stanislaus County, CA 102 km (63 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

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

  1. 2.4 21km SSW of Mariposa, CA
  2. 1.6 1km WSW of Auberry, CA
  3. 1.7 21km E of Le Grand, CA
  4. 1.9 6km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  5. 2.1 19km SSW of Mariposa, CA
  6. 1.7 20km SE of Yosemite Valley, CA
  7. 2.0 7km NE of Bonadelle Ranchos-Madera Ranchos, CA
  8. 2.0 17km SSW of Bootjack, CA
  9. 2.0 8km W of North Fork, CA
  10. 2.2 7km SE of Fairmead, CA
  11. 2.1 12km WNW of Yosemite Lakes, CA
  12. 2.1 19km SE of Yosemite Valley, CA
  13. 2.5 18km SSW of Mariposa, CA
  14. 1.5 7km NE of Bonadelle Ranchos-Madera Ranchos, CA
  15. 1.9 4km NE of Fairmead, 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.