QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5mw

4 km E of Round Valley, CA

· 5.5 km deep · released about 3.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 63 kmEsmeralda County 91 kmMadera County 108 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 3.5 (mw)
Depth
5.5 km below the surface
Felt
45 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
Nearest
Mono County, 63 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 886 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 45 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 53,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,700× the energy of this one
  4. This earthquake M 3.5 about 3.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 6.7× more

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 37.4075, -118.5500. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 63 km (39 mi) SSE of here earthquakes near Mono County
Esmeralda County, NV 91 km (56 mi) WSW of here earthquakes near Esmeralda County
Madera County, CA 108 km (67 mi) ENE of here earthquakes near Madera County
Fresno County, CA 122 km (76 mi) NE of here earthquakes near Fresno County
Inyo County, CA 139 km (86 mi) NW of here earthquakes near Inyo 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 17 km SSE of Mammoth Lakes, CA
  2. 1.9 17 km SSE of Mammoth Lakes, CA
  3. 1.7 18 km SSE of Mammoth Lakes, CA
  4. 2.1 9 km W of West Bishop, CA
  5. 1.8 16 km WSW of Toms Place, CA
  6. 1.7 8 km W of Round Valley, CA
  7. 1.9 9 km NNE of Big Pine, CA
  8. 1.8 17 km SSE of Mammoth Lakes, CA
  9. 2.8 17 km SSE of Mammoth Lakes, CA
  10. 1.9 18 km SSE of Mammoth Lakes, CA
  11. 1.6 8 km W of Round Valley, CA
  12. 2.6 19 km W of Wilkerson, CA
  13. 1.6 9 km ENE of Big Pine, CA
  14. 1.5 8 km W of Round Valley, CA
  15. 1.6 16 km SW of Deep Springs, 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 4.8 on 2016-02-16 — it released about 68 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.