QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

28km SSW of San Clemente, CA

· 18 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 53 kmSan Diego County 92 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 1.7 (ml)
Depth
18 km below the surface
Felt
no reports yet
Nearest
Orange County, 53 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2644 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 970,000× the energy of this one
  3. Around the size people start to feel M 3.0 86× the energy of this one
  4. This earthquake M 1.7 about 11 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 33.2012, -117.7423. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 53 km (33 mi) S of here earthquakes near Orange County
San Diego County, CA 92 km (57 mi) WNW of here earthquakes near San Diego County
Los Angeles County, CA 121 km (75 mi) SSE 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

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

  1. 2.4 46km SSW of Dana Point, CA
  2. 1.8 31km E of Avalon, CA
  3. 2.0 1km NNE of Laguna Beach, CA
  4. 1.8 4km SE of Dana Point, CA
  5. 1.9 25km WSW of Carlsbad, CA
  6. 2.1 26km WSW of Carlsbad, CA
  7. 3.1 26km WSW of Carlsbad, CA
  8. 2.0 32km SW of Dana Point, CA
  9. 1.9 4km NW of San Clemente, CA
  10. 1.9 8km W of Encinitas, CA
  11. 2.6 38km WSW of Encinitas, CA
  12. 1.8 31km W of La Jolla, CA
  13. 2.3 26km WSW of Carlsbad, CA
  14. 1.8 32km WSW of Encinitas, CA
  15. 1.6 31km W of La Jolla, 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.