QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7mw

1km S of View Park-Windsor Hills, CA

· 12 km deep · released about 5.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 24 kmOrange County 63 kmVentura County 83 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 3.7 (mw)
Depth
12 km below the surface
Felt
20412 reports · strongest reported intensity V
Measured shaking
intensity V (ShakeMap)
Nearest
Los Angeles County, 24 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2199 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 20412 people have reported feeling it to USGS.

How big was it?

This earthquake released about 5.2 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 33,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,000× the energy of this one
  4. This earthquake M 3.7 about 5.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 11× 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 33.9890, -118.3495. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 24 km (15 mi) SSW of here earthquakes near Los Angeles County
Orange County, CA 63 km (39 mi) WNW of here earthquakes near Orange County
Ventura County, CA 83 km (52 mi) ESE of here earthquakes near Ventura County

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

Aftershocks so far

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

  1. 3.7 1km NNE of San Fernando, CA
  2. 2.1 1km SE of Sylmar, CA
  3. 1.9 1km NW of San Fernando, CA
  4. 3.1 1km N of San Fernando, CA
  5. 2.1 1km NNW of San Fernando, CA
  6. 2.1 1km ESE of Sylmar, CA
  7. 1.9 1km W of Sylmar, CA
  8. 2.1 1km WSW of Sylmar, CA
  9. 2.4 1km WSW of Sylmar, CA
  10. 2.5 1km WSW of Sylmar, CA
  11. 4.2 1km SE of Sylmar, CA
  12. 1.8 14km SSE of Malibu Beach, CA
  13. 1.6 10km S of Malibu Beach, CA
  14. 2.2 4km NNW of Santa Monica, CA
  15. 1.8 1km W of Baldwin Park, 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.