QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

2 km WNW of Santa Monica, California

· 9.6 km deep · released about 1,200 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 30 kmVentura County 67 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 3.1 (ml)
Depth
9.6 km below the surface
Felt
2482 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
Nearest
Los Angeles County, 30 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1341 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2482 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,200 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 6.7 290,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,100× the energy of this one
  4. This earthquake M 3.1 about 1,200 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.2× 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 34.0263, -118.5193. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 30 km (19 mi) SW of here earthquakes near Los Angeles County
Ventura County, CA 67 km (42 mi) ESE of here earthquakes near Ventura County
Orange County, CA 79 km (49 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

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

  1. 2.1 5km WNW of Willowbrook, CA
  2. 1.6 4km N of Gardena, CA
  3. 1.6 11km S of San Pedro, CA
  4. 1.8 3km WSW of East Los Angeles, CA
  5. 1.9 17km S of Malibu Beach, CA
  6. 1.6 3km SE of Malibu Beach, CA
  7. 1.7 2km NE of La Canada Flintridge, CA
  8. 1.5 1km NNW of Florence-Graham, CA
  9. 1.6 10km SSW of Malibu, CA
  10. 1.9 3km SE of Chatsworth, CA
  11. 2.5 8km SSE of San Pedro, CA
  12. 1.5 4km WNW of Willowbrook, CA
  13. 1.5 4km S of Highland Park, CA
  14. 1.9 5km NW of Westwood, CA
  15. 3.6 5km NW of Westwood, 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.