QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

23 km E of Fish Camp, California

· 4.5 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 45 kmMariposa County 48 kmMono County 66 kmTuolumne County 80 kmFresno County 84 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 1.8 (md)
Depth
4.5 km below the surface
Felt
no reports yet
Nearest
Madera County, 45 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3540 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 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 37.4783, -119.3755. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 45 km (28 mi) NE of here earthquakes near Madera County
Mariposa County, CA 48 km (30 mi) ESE of here earthquakes near Mariposa County
Mono County, CA 66 km (41 mi) SW of here earthquakes near Mono County
Tuolumne County, CA 80 km (49 mi) SE of here earthquakes near Tuolumne County
Fresno County, CA 84 km (52 mi) NNE of here earthquakes near Fresno County
Merced County, CA 123 km (77 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

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

  1. 2.2 19 km SW of Aspen Springs, California
  2. 1.6 8 km ESE of Mammoth Lakes, California
  3. 2.0 8km NNW of Ahwahnee, CA
  4. 1.9 14 km WSW of Aspen Springs, California
  5. 2.3 15 km SW of Aspen Springs, California
  6. 1.5 19 km ESE of Yosemite Valley, California
  7. 1.7 10 km ESE of Mammoth Lakes, California
  8. 1.7 10 km ESE of Mammoth Lakes, California
  9. 2.3 10 km ESE of Mammoth Lakes, California
  10. 2.3 10 km ESE of Mammoth Lakes, California
  11. 2.1 10 km ESE of Mammoth Lakes, California
  12. 1.5 16 km SE of Yosemite Valley, California
  13. 1.6 10 km ESE of Mammoth Lakes, California
  14. 2.4 10 km ESE of Mammoth Lakes, California
  15. 1.9 10 km ESE of Mammoth Lakes, California

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.