QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

30km NE of Oakhurst, CA

· 12 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 46 kmMariposa County 49 kmMono County 65 kmTuolumne County 79 kmFresno County 85 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
12 km below the surface
Felt
no reports yet
Nearest
Madera County, 46 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1972 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 11 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 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 970,000× the energy of this one
  3. Around the size people start to feel M 3.0 86× the energy of this one
  4. This earthquake M 1.7 about 11 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 37.4888, -119.3718. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 46 km (28 mi) NE of here earthquakes near Madera County
Mariposa County, CA 49 km (30 mi) E of here earthquakes near Mariposa County
Mono County, CA 65 km (40 mi) SW of here earthquakes near Mono County
Tuolumne County, CA 79 km (49 mi) SE of here earthquakes near Tuolumne County
Fresno County, CA 85 km (53 mi) NNE of here earthquakes near Fresno County
Merced County, CA 124 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

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

  1. 1.9 13km W of Toms Place, CA
  2. 1.7 13km W of Toms Place, CA
  3. 1.8 11km ESE of Mammoth Lakes, CA
  4. 2.5 14km SE of Mammoth Lakes, CA
  5. 1.8 12km N of Yosemite Village, CA
  6. 1.7 12km S of Bootjack, CA
  7. 1.7 14km SE of Mammoth Lakes, CA
  8. 2.3 6km SE of Shaver Lake, CA
  9. 1.5 Central California
  10. 1.6 22km NE of North Fork, CA
  11. 1.6 16km WSW of Toms Place, CA
  12. 1.6 12km SE of Mammoth Lakes, CA
  13. 1.8 22km SSE of Mammoth Lakes, CA
  14. 2.2 29km NE of Oakhurst, CA
  15. 1.7 20km 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 4.0 on 2020-04-05 — it released about 3,200 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.