QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

20km ESE of Yosemite Valley, CA

· 16 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 49 kmMariposa County 51 kmMadera County 64 kmTuolumne County 65 kmFresno County 107 kmAlpine County 111 kmCalaveras County 119 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
16 km below the surface
Felt
no reports yet
Nearest
Mono County, 49 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1812 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 17 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 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 37.6902, -119.3537. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 49 km (30 mi) WSW of here earthquakes near Mono County
Mariposa County, CA 51 km (32 mi) ENE of here earthquakes near Mariposa County
Madera County, CA 64 km (40 mi) NNE of here earthquakes near Madera County
Tuolumne County, CA 65 km (40 mi) SE of here earthquakes near Tuolumne County
Fresno County, CA 107 km (66 mi) NNE of here earthquakes near Fresno County
Alpine County, CA 111 km (69 mi) SSE of here earthquakes near Alpine County

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

Aftershocks so far

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

  1. 1.6 17km WSW of Toms Place, CA
  2. 1.5 11km E of Mammoth Lakes, CA
  3. 1.8 29km NE of Oakhurst, CA
  4. 1.6 17km WSW of Mammoth Lakes, CA
  5. 1.9 30km NE of Oakhurst, CA
  6. 2.4 17km WSW of Mammoth Lakes, CA
  7. 1.6 7km ENE of Mammoth Lakes, CA
  8. 1.9 14km WNW of Toms Place, CA
  9. 2.0 14km WNW of Toms Place, CA
  10. 1.5 14km WNW of Toms Place, CA
  11. 1.7 14km WSW of Toms Place, CA
  12. 2.0 14km WNW of Toms Place, CA
  13. 1.8 20km SE of Yosemite Valley, CA
  14. 1.7 18km WSW of Toms Place, CA
  15. 1.6 7km N of Oakhurst, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2020-02-01 — it released about 7,400 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.