QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

9km WSW of Round Valley, CA

· 11 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 62 kmMadera County 95 kmEsmeralda County 104 kmFresno County 109 kmMariposa County 110 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, 62 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1650 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 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 37.3753, -118.6913. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 62 km (39 mi) SSE of here earthquakes near Mono County
Madera County, CA 95 km (59 mi) ENE of here earthquakes near Madera County
Esmeralda County, NV 104 km (64 mi) WSW of here earthquakes near Esmeralda County
Fresno County, CA 109 km (68 mi) NE of here earthquakes near Fresno County
Mariposa County, CA 110 km (68 mi) E of here earthquakes near Mariposa County
Tuolumne County, CA 133 km (83 mi) ESE of here earthquakes near Tuolumne County

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

Aftershocks so far

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

  1. 2.9 5km NE of Big Pine, CA
  2. 1.8 4km NE of Big Pine, CA
  3. 2.2 7km NE of Big Pine, CA
  4. 1.8 12km W of Toms Place, CA
  5. 1.7 5km E of Big Pine, CA
  6. 2.0 5km NE of Big Pine, CA
  7. 2.0 5km NE of Big Pine, CA
  8. 1.8 16km WSW of Toms Place, CA
  9. 2.3 9km WSW of Round Valley, CA
  10. 2.2 5km ENE of Dixon Lane-Meadow Creek, CA
  11. 1.8 9km NE of Big Pine, CA
  12. 3.3 7km N of Big Pine, CA
  13. 2.5 11km W of Toms Place, CA
  14. 1.6 1km SSE of Round Valley, CA
  15. 2.8 1km ESE of Round Valley, 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 31,000 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.