QuakeIndex

Earthquake · reviewed by a seismologist

M 3.9mw

41km NNE of Toms Place, CA

· 7.7 km deep · released about 11 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 30 kmMineral County 68 kmEsmeralda County 81 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 3.9 (mw)
Depth
7.7 km below the surface
Felt
9 reports · strongest reported intensity IV
Measured shaking
intensity V (ShakeMap)
Nearest
Mono County, 30 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2010 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 9 people have reported feeling it to USGS.

How big was it?

This earthquake released about 11 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.9 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 16,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 710× the energy of this one
  3. Magna, Utah 2020 M 5.7 500× the energy of this one
  4. This earthquake M 3.9 about 11 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 22× 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 37.9107, -118.5385. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 30 km (18 mi) E of here earthquakes near Mono County
Mineral County, NV 68 km (42 mi) S of here earthquakes near Mineral County
Esmeralda County, NV 81 km (50 mi) W of here earthquakes near Esmeralda County
Madera County, CA 132 km (82 mi) NE of here earthquakes near Madera County
Alpine County, CA 135 km (84 mi) SE of here earthquakes near Alpine County
Douglas County, NV 145 km (90 mi) SE of here earthquakes near Douglas County

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

Aftershocks so far

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

  1. 1.7 32 km S of Mina, Nevada
  2. 1.9 24 km S of Mina, Nevada
  3. 2.0 24 km S of Mina, Nevada
  4. 1.6 26 km S of Mina, Nevada
  5. 1.5 27 km S of Mina, Nevada
  6. 2.1 40km NNE of Toms Place, CA
  7. 1.7 26 km S of Mina, Nevada
  8. 1.9 40km NNE of Toms Place, CA
  9. 1.7 40km NNE of Toms Place, CA
  10. 1.7 41km NNE of Toms Place, CA
  11. 1.8 40km NNE of Toms Place, CA
  12. 1.7 41km NNE of Toms Place, CA
  13. 1.5 9 km NW of Benton, California
  14. 2.0 40km NNE of Toms Place, CA
  15. 2.5 40km NNE 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 5.2 on 2020-04-11 — it released about 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.