QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

8km SSE of Bootjack, CA

· 15 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mariposa County 20 kmMadera County 23 kmTuolumne County 70 kmFresno County 73 kmMerced County 81 kmMono County 103 kmStanislaus County 104 kmCalaveras 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 1.7 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Mariposa County, 20 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1530 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 11 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 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 37.3993, -119.8453. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mariposa County, CA 20 km (13 mi) SSE of here earthquakes near Mariposa County
Madera County, CA 23 km (14 mi) NNW of here earthquakes near Madera County
Tuolumne County, CA 70 km (43 mi) S of here earthquakes near Tuolumne County
Fresno County, CA 73 km (45 mi) NNW of here earthquakes near Fresno County
Merced County, CA 81 km (50 mi) ENE of here earthquakes near Merced County
Mono County, CA 103 km (64 mi) WSW of here earthquakes near Mono County

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

Aftershocks so far

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

  1. 2.2 20km ESE of Yosemite Valley, CA
  2. 2.0 5km NE of Oakhurst, CA
  3. 1.7 5km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  4. 2.6 8km W of Ahwahnee, CA
  5. 1.5 19km SE of Yosemite Valley, CA
  6. 2.2 16km SSW of Yosemite Village, CA
  7. 2.0 5km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  8. 2.2 20km SSW of Mariposa, CA
  9. 1.9 14km S of Mariposa, CA
  10. 2.0 10km S of Mariposa, CA
  11. 1.8 11km S of Mariposa, CA
  12. 2.4 20km ENE of Le Grand, CA
  13. 1.6 7km NE of Ahwahnee, CA
  14. 2.0 10km SSW of Mariposa, CA
  15. 2.3 10km 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.