QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

5 km W of Mammoth Lakes, CA

· -0.9 km deep · released about 390 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 34 kmMariposa County 77 kmMadera County 78 kmTuolumne County 92 kmFresno County 111 kmMineral County 112 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 2.7 (md)
Depth
-0.9 km below the surface
Felt
6 reports · strongest reported intensity III
Nearest
Mono County, 34 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 456 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 390 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 39,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 28,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.5× the energy of this one
  4. This earthquake M 2.7 about 390 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 37.6350, -119.0408. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 34 km (21 mi) SSW of here earthquakes near Mono County
Mariposa County, CA 77 km (48 mi) E of here earthquakes near Mariposa County
Madera County, CA 78 km (49 mi) NE of here earthquakes near Madera County
Tuolumne County, CA 92 km (57 mi) ESE of here earthquakes near Tuolumne County
Fresno County, CA 111 km (69 mi) NNE of here earthquakes near Fresno County
Mineral County, NV 112 km (70 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

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

  1. 1.7 15 km SSE of Mammoth Lakes, CA
  2. 2.2 13 km SW of Toms Place, CA
  3. 1.6 26 km SSW of Mammoth Lakes, CA
  4. 1.7 17 km W of Toms Place, CA
  5. 1.7 2 km S of Round Valley, CA
  6. 1.6 19 km WSW of Toms Place, CA
  7. 2.5 15 km SSE of Mammoth Lakes, CA
  8. 1.8 15 km SSE of Mammoth Lakes, CA
  9. 2.4 15 km SSE of Mammoth Lakes, CA
  10. 1.6 13 km W of Round Valley, CA
  11. 1.8 13 km W of Toms Place, CA
  12. 2.6 16 km WSW of Toms Place, CA
  13. 1.7 30 km NE of North Fork, CA
  14. 2.7 19 km WSW of Toms Place, CA
  15. 2.6 15 km WSW of Toms Place, 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 320 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.