QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

11 km W of Ahwahnee, CA

· 28 km deep · released about 350 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 18 kmMariposa County 25 kmFresno County 68 kmTuolumne County 75 kmMerced County 79 kmStanislaus County 104 kmMono County 106 kmCalaveras County 112 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 2.7 (md)
Depth
28 km below the surface
Felt
7 reports · strongest reported intensity III
Nearest
Madera County, 18 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 932 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 7 people have reported feeling it to USGS.

How big was it?

This earthquake released about 350 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 43,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 31,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.7× the energy of this one
  4. This earthquake M 2.7 about 350 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 37.3520, -119.8492. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 18 km (11 mi) NNW of here earthquakes near Madera County
Mariposa County, CA 25 km (16 mi) SSE of here earthquakes near Mariposa County
Fresno County, CA 68 km (42 mi) NNW of here earthquakes near Fresno County
Tuolumne County, CA 75 km (47 mi) S of here earthquakes near Tuolumne County
Merced County, CA 79 km (49 mi) ENE of here earthquakes near Merced County
Stanislaus County, CA 104 km (65 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

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

  1. 1.5 26 km NE of North Fork, CA
  2. 1.6 27 km NE of North Fork, CA
  3. 1.9 6 km E of Bonadelle Ranchos-Madera Ranchos, CA
  4. 2.3 15 km SW of Mariposa, CA
  5. 3.0 16 km SE of Yosemite Valley, CA
  6. 1.9 22 km SW of Bootjack, CA
  7. 2.7 9 km SE of Yosemite Valley, CA
  8. 2.2 6 km SW of Yosemite Lakes, CA
  9. 2.2 11 km SSW of Mariposa, CA
  10. 2.4 9 km SSW of Mariposa, CA
  11. 2.1 6 km E of Bonadelle Ranchos-Madera Ranchos, CA
  12. 1.8 9 km ESE of North Fork, CA
  13. 1.9 6 km E of Bonadelle Ranchos-Madera Ranchos, CA
  14. 2.3 6 km E of Bonadelle Ranchos-Madera Ranchos, CA
  15. 2.4 7 km 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.