QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6ml

5km NW of Westwood, CA

· 10 km deep · released about 3.9 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 23 kmVentura County 68 kmOrange County 79 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 (ml)
Depth
10 km below the surface
Felt
5861 reports · strongest reported intensity V
Measured shaking
intensity V (ShakeMap)
Nearest
Los Angeles County, 23 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1905 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5861 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.9 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 43,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,400× the energy of this one
  4. This earthquake M 3.6 about 3.9 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 8.2× 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 34.0867, -118.4757. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 23 km (14 mi) WSW of here earthquakes near Los Angeles County
Ventura County, CA 68 km (42 mi) ESE of here earthquakes near Ventura County
Orange County, CA 79 km (49 mi) NW of here earthquakes near Orange County

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

Aftershocks so far

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

  1. 2.3 1km WSW of Manhattan Beach, CA
  2. 2.5 4km SE of Piru, CA
  3. 1.6 1km SSE of Silver Lake, CA
  4. 2.2 0km ESE of Silver Lake, CA
  5. 2.4 15km WNW of Malibu, CA
  6. 1.6 12km SSW of Agua Dulce, CA
  7. 2.9 1km SE of Silver Lake, CA
  8. 2.4 12km SSW of Agua Dulce, CA
  9. 1.6 6km WSW of Valencia, CA
  10. 1.6 2km NNE of Granada Hills, CA
  11. 1.7 7km SSW of Castaic, CA
  12. 2.1 2km WSW of Hermosa Beach, CA
  13. 1.7 7km WSW of Malibu, CA
  14. 1.6 3km N of Monrovia, CA
  15. 1.6 4km WNW of La Mirada, 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.