QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

5km E of Seal Beach, CA

· 15 km deep · released about 74 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 27 kmLos Angeles County 55 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 2.3 (ml)
Depth
15 km below the surface
Felt
15 reports · strongest reported intensity III
Nearest
Orange County, 27 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2445 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 15 people have reported feeling it to USGS.

How big was it?

This earthquake released about 74 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 140,000× the energy of this one
  3. Around the size people start to feel M 3.0 13× the energy of this one
  4. This earthquake M 2.3 about 74 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 33.7333, -118.0558. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 27 km (17 mi) WNW of here earthquakes near Orange County
Los Angeles County, CA 55 km (34 mi) SSE of here earthquakes near Los Angeles County
Ventura County, CA 121 km (75 mi) SE of here earthquakes near Ventura County
San Diego County, CA 143 km (89 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

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

  1. 1.6 1km NNE of Lennox, CA
  2. 1.9 4km SSW of Huntington Beach, CA
  3. 1.5 2 km SSW of Brea, CA
  4. 1.9 3 km E of Lennox, CA
  5. 2.0 0km SSW of South El Monte, CA
  6. 2.2 3km SE of San Pedro, CA
  7. 1.9 2km NNE of Gardena, CA
  8. 2.0 4km W of Culver City, CA
  9. 1.5 12km ENE of North Tustin, CA
  10. 1.7 3km NNE of Montebello, CA
  11. 1.9 13km WSW of Hermosa Beach, CA
  12. 1.7 10km WSW of Corona, CA
  13. 1.5 1km NNE of Baldwin Hills, CA
  14. 1.9 9km SW of Corona, CA
  15. 2.1 12km SSE 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.