QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

4km SE of San Fernando, CA

· 8.7 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 15 kmVentura County 67 kmOrange County 87 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 1.7 (ml)
Depth
8.7 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 15 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2735 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 34.2543, -118.4148. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Los Angeles County, CA 15 km (10 mi) WNW of here earthquakes near Los Angeles County
Ventura County, CA 67 km (42 mi) E of here earthquakes near Ventura County
Orange County, CA 87 km (54 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

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

  1. 1.8 4km SW of MacArthur Park, CA
  2. 2.0 2km SW of Montebello, CA
  3. 1.6 2km N of Inglewood, CA
  4. 1.8 6km SW of Calabasas, CA
  5. 1.8 5km SE of Agoura Hills, CA
  6. 2.3 2km NE of Granada Hills, CA
  7. 2.2 3km N of East Los Angeles, CA
  8. 2.0 1km WNW of Redondo Beach, CA
  9. 2.2 9km SW of Castaic, CA
  10. 2.0 7km SSW of Pearblossum, CA
  11. 2.2 9km NW of Malibu, CA
  12. 2.0 12km WSW of Lake Hughes, CA
  13. 2.1 8km NW of Malibu, CA
  14. 2.0 9km NW of Malibu, CA
  15. 1.7 6km NNW of Pacoima, 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.