QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

26km WSW of Carlsbad, CA

· 14 km deep · released about 1,500 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 67 kmSan Diego County 79 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 3.1 (ml)
Depth
14 km below the surface
Felt
29 reports · strongest reported intensity IV
Nearest
Orange County, 67 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1718 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 29 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,500 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 220,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,900× the energy of this one
  4. This earthquake M 3.1 about 1,500 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.6× more

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 33.0897, -117.6228. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 67 km (41 mi) SSE of here earthquakes near Orange County
San Diego County, CA 79 km (49 mi) W 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

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

  1. 1.8 23 km WSW of Encinitas, CA
  2. 1.5 9km SSW of Escondido, CA
  3. 1.6 24km WSW of Carlsbad, CA
  4. 1.7 44km WSW of Carlsbad, CA
  5. 1.6 26km WSW of Carlsbad, CA
  6. 1.7 10km SW of La Jolla, CA
  7. 1.8 29km SSW of Dana Point, CA
  8. 2.4 15km SW of La Jolla, CA
  9. 1.6 9km SSE of San Clemente, CA
  10. 1.6 2km SSE of Dana Point, CA
  11. 2.2 28km E of Avalon, CA
  12. 2.3 42km WSW of Encinitas, CA
  13. 2.4 26km SW of Laguna Beach, CA
  14. 2.5 44km SE of Avalon, CA
  15. 1.6 25km WSW of Encinitas, 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.