QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

29km SE of San Clemente Is. (SE tip), CA

· 27 km deep · released about 650 lb of TNT

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10 km30 km60 km120 km N Orange County 117 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 2.9 (ml)
Depth
27 km below the surface
Felt
12 reports · strongest reported intensity IV
Nearest
Orange County, 117 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2682 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 12 people have reported feeling it to USGS.

How big was it?

This earthquake released about 650 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 23,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 650 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 32.6577, -118.1077. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 117 km (73 mi) SSW of here earthquakes near Orange County

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

Aftershocks so far

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

  1. 2.3 36km NE of San Clemente Is. (SE tip), CA
  2. 2.3 45km NE of San Clemente Is. (SE tip), CA
  3. 2.1 39km W of La Jolla, CA
  4. 2.3 15km NW of San Clemente Is. (SE tip), CA
  5. 1.5 38km W of La Jolla, CA
  6. 2.5 7km W of San Clemente Is. (SE tip), CA
  7. 3.1 10km WNW of San Clemente Is. (SE tip), CA
  8. 2.6 52km ESE of San Clemente Is. (SE tip), CA
  9. 2.7 33km WSW of La Jolla, CA
  10. 2.7 43km WSW of Encinitas, CA
  11. 2.9 45km SSE of San Clemente Is. (SE tip), CA
  12. 1.7 46km WSW of Coronado, CA
  13. 1.8 49km SE of San Clemente Is. (SE tip), CA
  14. 1.9 68km WSW of Coronado, CA
  15. 2.2 59km WSW of Coronado, 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.