QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

11km SW of Huntington Beach, CA

· 11 km deep · released about 5.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 28 kmLos Angeles County 67 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 1.5 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Orange County, 28 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3421 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 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 33.6147, -118.0737. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 28 km (18 mi) WSW of here earthquakes near Orange County
Los Angeles County, CA 67 km (42 mi) SSE of here earthquakes near Los Angeles County
Ventura County, CA 128 km (80 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

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

  1. 3.7 19km NE of Avalon, CA
  2. 1.5 1km NNW of Florence-Graham, CA
  3. 2.5 8km SSE of San Pedro, CA
  4. 1.5 4km WNW of Willowbrook, CA
  5. 2.2 3km ENE of North Tustin, CA
  6. 1.7 15km SW of Rancho Palos Verdes, CA
  7. 1.5 2km NW of Lennox, CA
  8. 1.7 6km SW of Signal Hill, CA
  9. 1.6 6km S of MacArthur Park, CA
  10. 1.8 4km WSW of Huntington Beach, CA
  11. 1.8 0km WNW of View Park-Windsor Hills, CA
  12. 1.7 0km SSE of View Park-Windsor Hills, CA
  13. 1.7 6km WSW of Huntington Beach, CA
  14. 2.0 5km NNW of Yorba Linda, CA
  15. 1.6 2km WSW of San Pedro, 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.