QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

14km SSW of Huntington Beach, CA

· 10 km deep · released about 22 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 30 kmLos Angeles County 70 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 1.9 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Orange County, 30 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1419 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 22 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 680,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 480,000× the energy of this one
  3. Around the size people start to feel M 3.0 43× the energy of this one
  4. This earthquake M 1.9 about 22 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 33.5883, -118.0785. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 30 km (18 mi) WSW of here earthquakes near Orange County
Los Angeles County, CA 70 km (43 mi) SSE of here earthquakes near Los Angeles County
Ventura County, CA 130 km (81 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

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

  1. 1.9 4km NNW of Orange, CA
  2. 1.5 2km SW of La Habra, CA
  3. 1.6 2km SW of La Habra, CA
  4. 1.7 2km SE of Placentia, CA
  5. 2.7 2km SSE of Placentia, CA
  6. 1.8 2km NNE of Villa Park, CA
  7. 1.7 20km SSW of Rancho Palos Verdes, CA
  8. 1.7 1km W of Brea, CA
  9. 1.8 22km SSE of San Pedro, CA
  10. 2.0 32km SW of Dana Point, CA
  11. 1.9 6km ENE of Villa Park, CA
  12. 2.5 1km NW of Bell, CA
  13. 1.7 11km WSW of Manhattan Beach, CA
  14. 1.9 4km NW of San Clemente, CA
  15. 1.9 10km WSW of Rancho Palos Verdes, 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.