QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

2km WNW of Las Flores, CA

· 7.2 km deep · released about 1.4 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 40 kmVentura County 56 kmOrange County 91 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 3.3 (ml)
Depth
7.2 km below the surface
Felt
727 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
Nearest
Los Angeles County, 40 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1134 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 727 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 120,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,200× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,700× the energy of this one
  4. This earthquake M 3.3 about 1.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3× 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 34.0453, -118.6537. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 40 km (25 mi) WSW of here earthquakes near Los Angeles County
Ventura County, CA 56 km (35 mi) SE of here earthquakes near Ventura County
Orange County, CA 91 km (56 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

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

  1. 1.7 6 km E of Moorpark, CA
  2. 2.3 32 km W of Rancho Palos Verdes, CA
  3. 1.7 14 km SSW of Thousand Oaks, CA
  4. 1.5 10 km W of Malibu, CA
  5. 1.7 4 km ESE of Gardena, CA
  6. 2.1 3 km NNE of Granada Hills, CA
  7. 1.7 10 km E of Santa Clarita, CA
  8. 1.7 1 km ENE of Lennox, CA
  9. 1.6 6km NNE of Chatsworth, CA
  10. 1.8 4km SW of Compton, CA
  11. 1.8 4km SSE of Highland Park, CA
  12. 2.8 2km ENE of Walnut Park, CA
  13. 2.7 2km WSW of Bell, CA
  14. 2.0 18km W of Malibu, CA
  15. 1.5 1km SSW of Century City, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2021-09-18 — it released about 28 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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