QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0mw

20 km E of Mono City, California

· 9.2 km deep · released about 13 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 16 kmMineral County 67 kmTuolumne County 92 kmAlpine County 99 kmMariposa County 103 kmLyon County 110 kmDouglas County 112 kmEsmeralda County 117 kmMadera County 120 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 4.0 (mw)
Depth
9.2 km below the surface
Felt
121 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Mono County, 16 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3009 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 121 people have reported feeling it to USGS.

How big was it?

This earthquake released about 13 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 13,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 600× the energy of this one
  3. Magna, Utah 2020 M 5.7 420× the energy of this one
  4. This earthquake M 4.0 about 13 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 27× 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 38.0602, -118.9173. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 16 km (10 mi) NNW of here earthquakes near Mono County
Mineral County, NV 67 km (42 mi) SW of here earthquakes near Mineral County
Tuolumne County, CA 92 km (57 mi) E of here earthquakes near Tuolumne County
Alpine County, CA 99 km (62 mi) SE of here earthquakes near Alpine County
Mariposa County, CA 103 km (64 mi) ENE of here earthquakes near Mariposa County
Lyon County, NV 110 km (68 mi) SSE of here earthquakes near Lyon County

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

Aftershocks so far

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

  1. 1.7 31 km SSW of Hawthorne, Nevada
  2. 1.6 31 km SSW of Hawthorne, Nevada
  3. 1.7 4 km ESE of Mammoth Lakes, California
  4. 1.9 4 km ESE of Mammoth Lakes, California
  5. 2.0 4 km ESE of Mammoth Lakes, California
  6. 1.7 6 km WSW of Mammoth Lakes, California
  7. 2.0 28 km WSW of Hawthorne, Nevada
  8. 2.2 29 km WSW of Hawthorne, Nevada
  9. 1.6 7 km ESE of Mammoth Lakes, California
  10. 1.8 3 km ESE of Mammoth Lakes, California
  11. 1.7 30 km ENE of Lee Vining, California
  12. 1.6 10 km ENE of Bridgeport, California
  13. 1.8 California-Nevada border region
  14. 2.0 29 km WSW of Hawthorne, Nevada
  15. 3.5 29 km SW of Hawthorne, Nevada

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 5.6 on 2016-12-28 — it released about 300 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.