QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

28km SW of Dana Point, CA

· 17 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 47 kmSan Diego County 107 kmLos Angeles County 109 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
no reports yet
Nearest
Orange County, 47 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1685 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 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 33.2677, -117.8912. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 47 km (29 mi) SSW of here earthquakes near Orange County
San Diego County, CA 107 km (67 mi) WNW of here earthquakes near San Diego County
Los Angeles County, CA 109 km (68 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

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

  1. 2.0 4km SW of Newport Beach, CA
  2. 1.8 3km SSW of Newport Beach, CA
  3. 1.8 3km SW of Newport Beach, CA
  4. 1.8 5km WSW of Huntington Beach, CA
  5. 1.6 9km SSE of San Clemente, CA
  6. 1.8 22km SSW of Newport Beach, CA
  7. 1.8 22km SSE of San Pedro, CA
  8. 1.6 2km SSE of Dana Point, CA
  9. 2.0 22km SSW of Seal Beach, CA
  10. 2.2 28km E of Avalon, CA
  11. 2.3 42km WSW of Encinitas, CA
  12. 2.4 26km SW of Laguna Beach, CA
  13. 2.5 44km SE of Avalon, CA
  14. 1.6 25km WSW of Encinitas, CA
  15. 2.1 29km WSW of Carlsbad, 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.