QuakeIndex

Earthquake · reviewed by a seismologist

M 4.6mw

9km NE of Coso Junction, CA

· 1.6 km deep · released about 140 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Inyo County 66 kmTulare County 81 kmKern County 114 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 4.6 (mw)
Depth
1.6 km below the surface
Felt
140 reports · strongest reported intensity V
Measured shaking
intensity VI (ShakeMap)
USGS impact alert
green
Nearest
Inyo County, 66 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1817 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 140 people have reported feeling it to USGS.

How big was it?

This earthquake released about 140 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 1,200× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 55× the energy of this one
  3. Magna, Utah 2020 M 5.7 39× the energy of this one
  4. This earthquake M 4.6 about 140 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 290× 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 36.1130, -117.8875. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Inyo County, CA 66 km (41 mi) SW of here earthquakes near Inyo County
Tulare County, CA 81 km (50 mi) E of here earthquakes near Tulare County
Kern County, CA 114 km (71 mi) NE of here earthquakes near Kern 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. 1.9 9km NE of Coso Junction, CA
  2. 1.6 11km NE of Coso Junction, CA
  3. 2.8 8km ENE of Coso Junction, CA
  4. 1.5 20km ESE of Little Lake, CA
  5. 1.8 9km NE of Coso Junction, CA
  6. 1.8 12km NE of Coso Junction, CA
  7. 1.5 16km ESE of Little Lake, CA
  8. 1.7 12km NE of Coso Junction, CA
  9. 1.8 12km NE of Coso Junction, CA
  10. 1.6 10km NE of Coso Junction, CA
  11. 1.6 12km NE of Coso Junction, CA
  12. 1.6 9km NNE of Coso Junction, CA
  13. 2.2 10km NE of Coso Junction, CA
  14. 2.0 17km W of Searles Valley, CA
  15. 1.8 10km ENE of Coso Junction, 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 7.1 on 2019-07-06 — it released about 4,900 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.