QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

10km NE of Ahwahnee, CA

· 2.2 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 26 kmMariposa County 29 kmTuolumne County 72 kmFresno County 74 kmMono County 87 kmMerced County 99 kmCalaveras County 117 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
2.2 km below the surface
Felt
no reports yet
Nearest
Madera County, 26 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3093 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 10 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 1,500,000× 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 95× the energy of this one
  4. This earthquake M 1.7 about 10 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 37.4277, -119.6412. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 26 km (16 mi) NNE of here earthquakes near Madera County
Mariposa County, CA 29 km (18 mi) SE of here earthquakes near Mariposa County
Tuolumne County, CA 72 km (45 mi) SSE of here earthquakes near Tuolumne County
Fresno County, CA 74 km (46 mi) N of here earthquakes near Fresno County
Mono County, CA 87 km (54 mi) SW of here earthquakes near Mono County
Merced County, CA 99 km (62 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

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

  1. 2.1 16km SSW of Bootjack, CA
  2. 1.6 17km SSW of Bootjack, CA
  3. 1.9 17km SSW of Bootjack, CA
  4. 1.9 12km NNE of North Fork, CA
  5. 1.8 22km ESE of Yosemite Valley, CA
  6. 1.9 30km SE of Yosemite Valley, CA
  7. 1.9 30km SE of Yosemite Valley, CA
  8. 1.7 23km NE of North Fork, CA
  9. 2.0 11km SSW of Mariposa, CA
  10. 1.6 22km NE of Ahwahnee, CA
  11. 2.3 9km NNE of Oakhurst, CA
  12. 2.1 3km NW of Yosemite Lakes, CA
  13. 1.5 21km ESE of Yosemite Valley, CA
  14. 2.0 10km NW of Yosemite Lakes, CA
  15. 2.6 6km E of Friant, 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.