QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6ml

13km NE of Trabuco Canyon, CA

· 11 km deep · released about 4.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 28 kmLos Angeles County 89 kmSan Diego County 102 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 3.6 (ml)
Depth
11 km below the surface
Felt
824 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
Orange County, 28 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1451 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 824 people have reported feeling it to USGS.

How big was it?

This earthquake released about 4.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 42,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,300× the energy of this one
  4. This earthquake M 3.6 about 4.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 8.5× 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 33.7323, -117.4787. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 28 km (18 mi) ENE of here earthquakes near Orange County
Los Angeles County, CA 89 km (55 mi) SE of here earthquakes near Los Angeles County
San Diego County, CA 102 km (64 mi) NW of here earthquakes near San Diego County

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

Aftershocks so far

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

  1. 1.5 4km SE of Home Gardens, CA
  2. 1.6 1km NE of Mira Loma, CA
  3. 1.6 6km NW of Glen Avon, CA
  4. 2.1 4km S of Huntington Beach, CA
  5. 1.7 5km N of Lake Elsinore, CA
  6. 1.9 4km N of Fountain Valley, CA
  7. 1.5 4km SE of Home Gardens, CA
  8. 2.6 4km SSW of Redlands, CA
  9. 1.7 8km ESE of Yorba Linda, CA
  10. 1.6 3km WNW of Beaumont, CA
  11. 1.8 1km W of Yorba Linda, CA
  12. 1.9 8km WSW of Corona, CA
  13. 2.4 8km WSW of Corona, CA
  14. 2.0 3km ESE of Villa Park, CA
  15. 1.8 4km SE of Home Gardens, 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.