QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

6km W of Topanga, CA

· 15 km deep · released about 1,500 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 39 kmVentura County 52 kmOrange County 95 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 3.1 (ml)
Depth
15 km below the surface
Felt
572 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Los Angeles County, 39 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3133 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 572 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,500 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,200× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× 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 34.0952, -118.6710. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 39 km (24 mi) WSW of here earthquakes near Los Angeles County
Ventura County, CA 52 km (32 mi) SE of here earthquakes near Ventura County
Orange County, CA 95 km (59 mi) WNW of here earthquakes near Orange County

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

Aftershocks so far

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

  1. 1.7 8km S of Malibu Beach, CA
  2. 1.7 11km N of Piru, CA
  3. 2.4 16km SW of Malibu, CA
  4. 1.9 4km WSW of Compton, CA
  5. 1.8 2km NE of Silver Lake, CA
  6. 1.7 18km SSE of Malibu, CA
  7. 1.5 6km NNE of Granada Hills, CA
  8. 2.5 3km N of Carson, CA
  9. 1.7 12km S of Malibu Beach, CA
  10. 1.5 2km WSW of East Los Angeles, CA
  11. 1.7 6km ESE of Port Hueneme, CA
  12. 1.7 3km WSW of Culver City, CA
  13. 1.6 3km NW of Inglewood, CA
  14. 1.6 2km WNW of Inglewood, CA
  15. 1.7 7km NNW of Fillmore, 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.