QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

10km SSW of Mammoth Lakes, CA

· 2.8 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 42 kmMadera County 76 kmMariposa County 80 kmTuolumne County 99 kmFresno County 105 kmMineral 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
2.8 km below the surface
Felt
no reports yet
Nearest
Mono County, 42 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1426 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 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 37.5545, -119.0055. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 42 km (26 mi) SSW of here earthquakes near Mono County
Madera County, CA 76 km (47 mi) ENE of here earthquakes near Madera County
Mariposa County, CA 80 km (50 mi) E of here earthquakes near Mariposa County
Tuolumne County, CA 99 km (62 mi) ESE of here earthquakes near Tuolumne County
Fresno County, CA 105 km (65 mi) NNE of here earthquakes near Fresno County
Mineral County, NV 119 km (74 mi) SSW of here earthquakes near Mineral County

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

Aftershocks so far

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

  1. 1.6 13km SE of Mammoth Lakes, CA
  2. 1.8 14km SE of Mammoth Lakes, CA
  3. 1.8 16km SE of Yosemite Valley, CA
  4. 1.8 10km WSW of Toms Place, CA
  5. 1.5 15km W of Round Valley, CA
  6. 2.6 10km WSW of Toms Place, CA
  7. 1.6 16km WSW of Toms Place, CA
  8. 1.7 6km NNE of Round Valley, CA
  9. 1.8 14km SE of Yosemite Valley, CA
  10. 1.8 28km NE of Oakhurst, CA
  11. 1.6 3km E of Round Valley, CA
  12. 1.9 28km NE of Oakhurst, CA
  13. 1.9 13km W of Toms Place, CA
  14. 1.6 10km SSE of Mammoth Lakes, CA
  15. 1.6 25km SSW of Mammoth Lakes, 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 9,100 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.