QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

30km SSE of Avalon, CA

· 5.8 km deep · released about 830 lb of TNT

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10 km30 km60 km120 km N Orange County 71 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 3.0 (ml)
Depth
5.8 km below the surface
Felt
32 reports · strongest reported intensity III
Nearest
Orange County, 71 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3110 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 32 people have reported feeling it to USGS.

How big was it?

This earthquake released about 830 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 410,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 18,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 830 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 33.1205, -118.1517. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 71 km (44 mi) SSW of here earthquakes near Orange County
Los Angeles County, CA 120 km (75 mi) S of here earthquakes near Los Angeles County

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

Aftershocks so far

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

  1. 2.3 5km WNW of San Clemente Is. (SE tip), CA
  2. 2.4 12km WNW of San Clemente Is. (SE tip), CA
  3. 3.3 14km W of San Clemente Is. (SE tip), CA
  4. 2.9 16km WNW of San Clemente Is. (SE tip), CA
  5. 2.6 11km W of San Clemente Is. (SE tip), CA
  6. 4.3 15km W of San Clemente Is. (SE tip), CA
  7. 4.3 13km W of San Clemente Is. (SE tip), CA
  8. 3.0 41km WSW of Camp Pendleton South, CA
  9. 2.2 41km WSW of Carlsbad, CA
  10. 1.6 45km WSW of Carlsbad, CA
  11. 1.6 40km WSW of Carlsbad, CA
  12. 2.5 45km ENE of San Clemente Is. (SE tip), CA
  13. 1.8 39km WSW of Carlsbad, CA
  14. 2.9 12km NW of San Clemente Is. (NW tip), CA
  15. 2.1 21km NE of San Clemente Is. (SE tip), 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.