QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

8 km N of Bass Lake, California

· 4.2 km deep · released about 9.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 26 kmMariposa County 35 kmFresno County 72 kmTuolumne County 77 kmMono County 85 kmMerced County 103 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
4.2 km below the surface
Felt
no reports yet
Nearest
Madera County, 26 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3322 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 37.4017, -119.5850. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 26 km (16 mi) NE of here earthquakes near Madera County
Mariposa County, CA 35 km (22 mi) ESE of here earthquakes near Mariposa County
Fresno County, CA 72 km (44 mi) N of here earthquakes near Fresno County
Tuolumne County, CA 77 km (48 mi) SSE of here earthquakes near Tuolumne County
Mono County, CA 85 km (53 mi) SW of here earthquakes near Mono County
Merced County, CA 103 km (64 mi) ENE of here earthquakes near Merced County

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

Aftershocks so far

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

  1. 1.6 22km ESE of Yosemite Valley, CA
  2. 1.7 17km S of Bootjack, CA
  3. 1.6 18km W of Yosemite Lakes, CA
  4. 1.9 27km SSW of Mammoth Lakes, CA
  5. 2.0 11km SSW of Bootjack, CA
  6. 1.9 2km E of Yosemite Lakes, CA
  7. 2.5 14km W of Mammoth Lakes, CA
  8. 2.0 5km E of Yosemite Lakes, CA
  9. 1.9 5km E of Yosemite Lakes, CA
  10. 2.0 3km ENE of Yosemite Lakes, CA
  11. 2.6 17km SE of Yosemite Valley, CA
  12. 3.1 10km NNE of Oakhurst, CA
  13. 1.7 21km SSW of Bootjack, CA
  14. 1.6 9km NE of North Fork, CA
  15. 2.4 11km NNW of Yosemite Lakes, 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.