QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

8km E of Mammoth Lakes, CA

· -0.6 km deep · released about 430 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 31 kmMadera County 90 kmMariposa County 90 kmTuolumne County 103 kmMineral County 106 kmEsmeralda County 112 kmFresno 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 2.8 (md)
Depth
-0.6 km below the surface
Felt
2 reports · strongest reported intensity III
Nearest
Mono County, 31 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1492 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 430 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 35,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 25,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.2× the energy of this one
  4. This earthquake M 2.8 about 430 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 37.6402, -118.8907. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 31 km (19 mi) S of here earthquakes near Mono County
Madera County, CA 90 km (56 mi) ENE of here earthquakes near Madera County
Mariposa County, CA 90 km (56 mi) E of here earthquakes near Mariposa County
Tuolumne County, CA 103 km (64 mi) ESE of here earthquakes near Tuolumne County
Mineral County, NV 106 km (66 mi) SSW of here earthquakes near Mineral County
Esmeralda County, NV 112 km (69 mi) W of here earthquakes near Esmeralda 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. 1.6 10km E of Mammoth Lakes, CA
  2. 1.9 10km E of Mammoth Lakes, CA
  3. 2.0 16km WSW of Toms Place, CA
  4. 2.2 16km WSW of Toms Place, CA
  5. 1.6 11km SW of Toms Place, CA
  6. 2.0 10km WSW of Toms Place, CA
  7. 2.1 10km WSW of Toms Place, CA
  8. 2.0 8km E of Mammoth Lakes, CA
  9. 1.6 9km E of Mammoth Lakes, CA
  10. 1.7 8km E of Mammoth Lakes, CA
  11. 1.5 9km E of Mammoth Lakes, CA
  12. 1.8 7km E of Mammoth Lakes, CA
  13. 2.8 0km SSW of Round Valley, CA
  14. 2.5 9km WSW of Round Valley, CA
  15. 1.6 9km E 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 5.2 on 2020-04-11 — it released about 5,100 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.