QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

4km NNE of Santa Clarita, CA

· 18 km deep · released about 350 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 35 kmVentura County 60 kmKern County 102 kmOrange County 108 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 2.7 (ml)
Depth
18 km below the surface
Felt
23 reports · strongest reported intensity IV
Nearest
Los Angeles County, 35 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 712 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 23 people have reported feeling it to USGS.

How big was it?

This earthquake released about 350 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 43,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 31,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.7× the energy of this one
  4. This earthquake M 2.7 about 350 lb of TNT

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 34.4532, -118.4865. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 35 km (22 mi) NW of here earthquakes near Los Angeles County
Ventura County, CA 60 km (37 mi) E of here earthquakes near Ventura County
Kern County, CA 102 km (63 mi) SSE of here earthquakes near Kern County
Orange County, CA 108 km (67 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

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

  1. 1.6 14km N of Castaic, CA
  2. 2.5 7km WNW of Lake Hughes, CA
  3. 2.0 4km W of Culver City, CA
  4. 1.5 18km SSW of Gorman, CA
  5. 2.3 8 km SW of Green Valley, California
  6. 1.7 2km SSE of Castaic, CA
  7. 2.4 13km N of Piru, CA
  8. 1.9 2km ENE of Northridge, CA
  9. 1.6 14km N of Castaic, CA
  10. 1.5 14km N of Castaic, CA
  11. 2.2 14km N of Castaic, CA
  12. 2.9 1km W of Chatsworth, CA
  13. 3.1 1km NW of Chatsworth, CA
  14. 1.8 9km NE of Piru, CA
  15. 1.5 3km W of Highland 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.