QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

31km W of La Jolla, CA

· 17 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 79 kmOrange County 91 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 1.8 (ml)
Depth
17 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
San Diego County, 79 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2162 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 32.8663, -117.6033. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Diego County, CA 79 km (49 mi) WSW of here earthquakes near San Diego County
Orange County, CA 91 km (57 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

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

  1. 1.6 26km WSW of Carlsbad, CA
  2. 1.7 10km SW of La Jolla, CA
  3. 1.8 29km SSW of Dana Point, CA
  4. 2.4 15km SW of La Jolla, CA
  5. 2.6 43km SE of San Clemente Is. (SE tip), CA
  6. 2.3 42km WSW of Encinitas, CA
  7. 2.5 44km SE of Avalon, CA
  8. 1.6 25km WSW of Encinitas, CA
  9. 2.1 29km WSW of Carlsbad, CA
  10. 1.7 17km W of La Jolla, CA
  11. 2.0 49km ENE of San Clemente Is. (SE tip), CA
  12. 1.9 47km SSW of San Clemente, CA
  13. 1.6 49km ENE of San Clemente Is. (SE tip), CA
  14. 2.3 36km NE of San Clemente Is. (SE tip), CA
  15. 2.3 45km 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.