QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5ml

23km SSW of Newport Beach, CA

· 10.0 km deep · released about 3.2 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 36 kmLos Angeles County 89 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 3.5 (ml)
Depth
10.0 km below the surface
Felt
77 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Orange County, 36 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1461 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 77 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 53,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,700× the energy of this one
  4. This earthquake M 3.5 about 3.2 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 6.7× 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 33.4197, -118.0090. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 36 km (22 mi) SW of here earthquakes near Orange County
Los Angeles County, CA 89 km (56 mi) SSE of here earthquakes near Los Angeles County
San Diego County, CA 123 km (76 mi) WNW of here earthquakes near San Diego County
Ventura County, CA 147 km (91 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

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

  1. 2.1 18km S of San Pedro, CA
  2. 1.8 22km SSW of Newport Beach, CA
  3. 1.7 12km SSW of Rancho Palos Verdes, CA
  4. 1.8 22km SSE of San Pedro, CA
  5. 1.6 2km SSE of Dana Point, CA
  6. 2.0 22km SSW of Seal Beach, CA
  7. 1.7 9km S of San Pedro, CA
  8. 2.6 2km S of Placentia, CA
  9. 2.2 28km E of Avalon, CA
  10. 2.4 26km SW of Laguna Beach, CA
  11. 2.5 44km SE of Avalon, CA
  12. 2.0 49km ENE of San Clemente Is. (SE tip), CA
  13. 1.6 3km S of Westminster, CA
  14. 1.5 4km S of Westminster, CA
  15. 1.9 17km NE of Avalon, 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.