QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

21 km ESE of Yosemite Valley, CA

· 1.6 km deep · released about 10 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mariposa County 49 kmMono County 52 kmMadera County 60 kmTuolumne County 66 kmFresno County 102 kmAlpine County 114 kmCalaveras County 120 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 1.7 (md)
Depth
1.6 km below the surface
Felt
no reports yet
Nearest
Mariposa County, 49 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 147 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 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 95× the energy of this one
  4. This earthquake M 1.7 about 10 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 37.6530, -119.3693. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mariposa County, CA 49 km (30 mi) E of here earthquakes near Mariposa County
Mono County, CA 52 km (33 mi) SW of here earthquakes near Mono County
Madera County, CA 60 km (37 mi) NE of here earthquakes near Madera County
Tuolumne County, CA 66 km (41 mi) SE of here earthquakes near Tuolumne County
Fresno County, CA 102 km (64 mi) NNE of here earthquakes near Fresno County
Alpine County, CA 114 km (71 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

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

  1. 1.0 18 km WSW of Toms Place, CA
  2. 1.1 15 km SSE of Mammoth Lakes, CA
  3. 2.7 25 km SW of Toms Place, CA
  4. 1.7 22 km SE of Yosemite Valley, CA
  5. 2.5 22 km SE of Yosemite Valley, CA
  6. 1.9 16 km ESE of Yosemite Valley, CA
  7. 1.6 13 km ESE of Mammoth Lakes, CA
  8. 3.4 16 km WSW of Toms Place, CA
  9. 1.6 18 km WSW of Toms Place, CA
  10. 1.7 9 km E of Mammoth Lakes, CA
  11. 1.7 23 km WSW of Mammoth Lakes, CA
  12. 1.5 29 km S of Mammoth Lakes, CA
  13. 2.0 17 km WSW of Toms Place, CA
  14. 1.6 31 km NNE of North Fork, CA
  15. 1.7 16 km SE of Yosemite Valley, 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 12,000 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.