QuakeIndex

Earthquake · reviewed by a seismologist

M 4.5mw

19km NNE of Ridgecrest, CA

· 3.6 km deep · released about 76 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Inyo County 89 kmKern County 112 kmTulare County 116 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 4.5 (mw)
Depth
3.6 km below the surface
Felt
240 reports · strongest reported intensity IV
Measured shaking
intensity VI (ShakeMap)
USGS impact alert
green
Nearest
Inyo County, 89 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1852 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 240 people have reported feeling it to USGS.

How big was it?

This earthquake released about 76 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 2,200× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 99× the energy of this one
  3. Magna, Utah 2020 M 5.7 70× the energy of this one
  4. This earthquake M 4.5 about 76 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 160× 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 35.7837, -117.6143. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Inyo County, CA 89 km (55 mi) SSW of here earthquakes near Inyo County
Kern County, CA 112 km (70 mi) ENE of here earthquakes near Kern County
Tulare County, CA 116 km (72 mi) ESE 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. 3.2 10km NE of Coso Junction, CA
  2. 2.4 10km NE of Coso Junction, CA
  3. 3.1 10km NNE of Coso Junction, CA
  4. 2.2 10km NE of Coso Junction, CA
  5. 2.7 10km NE of Coso Junction, CA
  6. 3.3 10km NNE of Coso Junction, CA
  7. 4.4 10km NE of Coso Junction, CA
  8. 2.0 10km NE of Coso Junction, CA
  9. 1.6 10km NE of Coso Junction, CA
  10. 2.1 11km SW of Searles Valley, CA
  11. 1.5 25km N of Searles Valley, CA
  12. 1.9 17km SSW of Trona, CA
  13. 2.5 17km S of Trona, CA
  14. 3.1 17km SSW of Searles Valley, CA
  15. 1.6 18km E of Little Lake, 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 8,800 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.