QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

40km N of Toms Place, CA

· 11 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 22 kmMineral County 69 kmEsmeralda County 89 kmTuolumne County 118 kmMariposa 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 1.8 (md)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Mono County, 22 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1518 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 37.9145, -118.6288. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 22 km (13 mi) E of here earthquakes near Mono County
Mineral County, NV 69 km (43 mi) SSW of here earthquakes near Mineral County
Esmeralda County, NV 89 km (55 mi) W of here earthquakes near Esmeralda County
Tuolumne County, CA 118 km (73 mi) E of here earthquakes near Tuolumne County
Mariposa County, CA 119 km (74 mi) ENE of here earthquakes near Mariposa County
Madera County, CA 126 km (78 mi) NE of here earthquakes near Madera 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. 1.9 California-Nevada border region
  2. 2.0 14km WNW of Toms Place, CA
  3. 1.6 15km SE of Mammoth Lakes, CA
  4. 1.6 10km W of Toms Place, CA
  5. 1.7 10km W of Toms Place, CA
  6. 2.3 11km ESE of Mammoth Lakes, CA
  7. 2.9 11km ESE of Mammoth Lakes, CA
  8. 1.6 11km ESE of Mammoth Lakes, CA
  9. 2.5 11km ESE of Mammoth Lakes, CA
  10. 2.2 11km ESE of Mammoth Lakes, CA
  11. 1.6 11km ESE of Mammoth Lakes, CA
  12. 2.3 40km SSW of Qualeys Camp, NV
  13. 1.8 13km W of Toms Place, CA
  14. 1.8 11km SE of Mammoth Lakes, CA
  15. 2.5 California-Nevada border region

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 150,000 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.