QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

10km N of North Fork, CA

· 40 km deep · released about 530 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 23 kmMariposa County 44 kmFresno County 63 kmTuolumne County 87 kmMono County 88 kmMerced County 106 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 2.8 (md)
Depth
40 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Madera County, 23 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2363 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 530 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 29,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 20,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.8× the energy of this one
  4. This earthquake M 2.8 about 530 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 37.3165, -119.5335. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 23 km (14 mi) ENE of here earthquakes near Madera County
Mariposa County, CA 44 km (27 mi) SE of here earthquakes near Mariposa County
Fresno County, CA 63 km (39 mi) N of here earthquakes near Fresno County
Tuolumne County, CA 87 km (54 mi) SSE of here earthquakes near Tuolumne County
Mono County, CA 88 km (55 mi) SW of here earthquakes near Mono County
Merced County, CA 106 km (66 mi) E of here earthquakes near Merced County

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

Aftershocks so far

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

  1. 1.9 4km NW of Yosemite Lakes, CA
  2. 3.2 5km ESE of Shaver Lake, CA
  3. 2.1 7km SSW of Yosemite Lakes, CA
  4. 1.8 18km SE of Yosemite Valley, CA
  5. 1.6 18km SE of Yosemite Valley, CA
  6. 2.8 18km SE of Yosemite Valley, CA
  7. 1.9 18km SE of Yosemite Valley, CA
  8. 1.8 20km SSW of Bootjack, CA
  9. 1.9 7km N of North Fork, CA
  10. 1.9 6km W of Yosemite Lakes, CA
  11. 1.6 3km NNW of Yosemite Lakes, CA
  12. 1.7 16km SE of Yosemite Valley, CA
  13. 1.9 20km SSW of Bootjack, CA
  14. 2.1 6km SSE of Shaver Lake, CA
  15. 2.1 18km 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.