QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6mw

8km WSW of Ludlow, CA

· 2.4 km deep · released about 4.5 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Bernardino County 19 kmRiverside County 109 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 3.6 (mw)
Depth
2.4 km below the surface
Felt
3 reports · strongest reported intensity I
Measured shaking
intensity V (ShakeMap)
Nearest
San Bernardino County, 19 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1565 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 4.5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 38,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,200× the energy of this one
  4. This earthquake M 3.6 about 4.5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 9.4× 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 34.6920, -116.2368. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Bernardino County, CA 19 km (12 mi) SSW of here earthquakes near San Bernardino County
Riverside County, CA 109 km (68 mi) NNW of here earthquakes near Riverside 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. 1.9 8km WSW of Ludlow, CA
  2. 2.2 8km WSW of Ludlow, CA
  3. 1.7 9km WSW of Ludlow, CA
  4. 1.7 8km WSW of Ludlow, CA
  5. 2.0 8km WSW of Ludlow, CA
  6. 2.8 8km WSW of Ludlow, CA
  7. 2.0 8km WSW of Ludlow, CA
  8. 2.6 8km WSW of Ludlow, CA
  9. 2.0 9km WSW of Ludlow, CA
  10. 1.9 8km WSW of Ludlow, CA
  11. 2.9 8km WSW of Ludlow, CA
  12. 4.1 8km WSW of Ludlow, CA
  13. 3.5 8km WSW of Ludlow, CA
  14. 1.6 34km N of Yucca Valley, CA
  15. 1.7 36km ENE of Lucerne 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.