QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

34 km WSW of Encinitas, CA

· 10 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 80 kmOrange County 85 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
10 km below the surface
Felt
no reports yet
Nearest
San Diego County, 80 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 993 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 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× 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 32.9255, -117.6303. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Diego County, CA 80 km (50 mi) W of here earthquakes near San Diego County
Orange County, CA 85 km (53 mi) S of here earthquakes near Orange 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. 1.7 26 km WSW of Carlsbad, CA
  2. 1.8 36 km W of La Jolla, CA
  3. 1.7 31 km W of La Jolla, CA
  4. 2.3 27 km SW of Carlsbad, CA
  5. 1.6 21 km WNW of La Jolla, CA
  6. 1.9 27 km NE of San Clemente Is. (SE tip), CA
  7. 1.6 31 km ESE of Avalon, CA
  8. 1.9 12 km SW of La Jolla, CA
  9. 2.6 25 km ESE of San Clemente Is. (SE tip), CA
  10. 2.2 40 km WSW of Carlsbad, CA
  11. 1.8 6 km SW of Carlsbad, CA
  12. 2.5 47 km SSW of Dana Point, CA
  13. 2.0 41 km WSW of Encinitas, CA
  14. 1.8 30 km SSW of Dana Point, CA
  15. 1.6 17 km SW 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.