QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

5 km W of Parkwood, CA

· 15 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fresno County 43 kmMadera County 44 kmMerced County 64 kmMariposa County 75 kmSan Benito County 95 kmKings County 97 kmStanislaus 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 2.9 (md)
Depth
15 km below the surface
Felt
5 reports · strongest reported intensity III
Nearest
Fresno County, 43 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 660 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 36.9195, -120.0948. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fresno County, CA 43 km (27 mi) WNW of here earthquakes near Fresno County
Madera County, CA 44 km (28 mi) SW of here earthquakes near Madera County
Merced County, CA 64 km (40 mi) ESE of here earthquakes near Merced County
Mariposa County, CA 75 km (46 mi) SSW of here earthquakes near Mariposa County
San Benito County, CA 95 km (59 mi) ENE of here earthquakes near San Benito County
Kings County, CA 97 km (61 mi) NNW of here earthquakes near Kings County

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

Aftershocks so far

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

  1. 2.2 17 km NW of Yosemite Lakes, CA
  2. 2.1 12 km NNW of Friant, CA
  3. 2.1 17 km NW of Yosemite Lakes, CA
  4. 2.7 6 km WSW of Friant, CA
  5. 1.8 12 km S of Yosemite Lakes, CA
  6. 2.5 6 km E of Cantua Creek, CA
  7. 2.1 7 km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  8. 2.3 11 km S of Yosemite Lakes, CA
  9. 2.3 1 km W of Madera, CA
  10. 1.8 12 km NNW of Friant, CA
  11. 2.3 12 km E of Cantua Creek, CA
  12. 2.0 2 km ESE of Yosemite Lakes, CA
  13. 2.5 3 km SE of Yosemite Lakes, CA
  14. 2.0 13 km WSW of Madera, CA
  15. 1.9 6 km SSW 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.