QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

17 km SW of Round Valley, CA

· 9.7 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mono County 73 kmMadera County 94 kmFresno County 103 kmEsmeralda County 109 kmMariposa County 113 kmTulare County 117 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 3.1 (ml)
Depth
9.7 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
Mono County, 73 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 772 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 270,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,500× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.3× 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 37.2793, -118.6898. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mono County, CA 73 km (45 mi) SSE of here earthquakes near Mono County
Madera County, CA 94 km (58 mi) E of here earthquakes near Madera County
Fresno County, CA 103 km (64 mi) NE of here earthquakes near Fresno County
Esmeralda County, NV 109 km (67 mi) WSW of here earthquakes near Esmeralda County
Mariposa County, CA 113 km (70 mi) ESE of here earthquakes near Mariposa County
Tulare County, CA 117 km (73 mi) N of here earthquakes near Tulare County

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

Aftershocks so far

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

  1. 3.5 14 km WNW of Round Valley, CA
  2. 1.5 13 km WNW of Round Valley, CA
  3. 1.9 13 km WNW of Round Valley, CA
  4. 2.7 6 km NNW of Dixon Lane-Meadow Creek, CA
  5. 3.4 7 km NNW of Dixon Lane-Meadow Creek, CA
  6. 2.1 7 km NNW of Dixon Lane-Meadow Creek, CA
  7. 1.6 9 km S of Round Valley, CA
  8. 1.9 9 km NNW of Round Valley, CA
  9. 1.8 7 km SE of Big Pine, CA
  10. 1.6 9 km ENE of Round Valley, CA
  11. 1.8 14 km WSW of Toms Place, CA
  12. 2.3 15 km WSW of Toms Place, CA
  13. 1.6 11 km ESE of Toms Place, CA
  14. 2.2 1 km ESE of Dixon Lane-Meadow Creek, CA
  15. 1.6 13 km SSE of Mammoth Lakes, 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 340 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.