QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7ml

19km NE of Avalon, CA

· 11 km deep · released about 5.5 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 45 kmLos Angeles County 82 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 3.7 (ml)
Depth
11 km below the surface
Felt
95 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Orange County, 45 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3175 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 95 people have reported feeling it to USGS.

How big was it?

This earthquake released about 5.5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 31,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 970× the energy of this one
  4. This earthquake M 3.7 about 5.5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 12× 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 33.4618, -118.1837. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 45 km (28 mi) WSW of here earthquakes near Orange County
Los Angeles County, CA 82 km (51 mi) S of here earthquakes near Los Angeles County
Ventura County, CA 133 km (82 mi) SE of here earthquakes near Ventura County

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

Aftershocks so far

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

  1. 1.5 4km SE of Rancho Palos Verdes, CA
  2. 1.6 22km N of Avalon, CA
  3. 1.6 2km SSE of Dana Point, CA
  4. 2.9 2km S of Buena Park, CA
  5. 1.8 4km WSW of Irvine, CA
  6. 1.5 24km SW of Dana Point, CA
  7. 1.8 1km NNW of Rolling Hills Estates, CA
  8. 2.0 2km S of Newport Beach, CA
  9. 1.7 9km SW of Rancho Palos Verdes, CA
  10. 2.2 1km NNE of Hermosa Beach, CA
  11. 1.9 4km WSW of Compton, CA
  12. 2.0 4km W of Dana Point, CA
  13. 2.7 18km NNE of Avalon, CA
  14. 1.7 4km SW of Paramount, CA
  15. 2.5 3km N of Carson, 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.