QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

14km SW of Coronado, CA

· 16 km deep · released about 1.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 68 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 3.3 (ml)
Depth
16 km below the surface
Felt
126 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
San Diego County, 68 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1525 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 126 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 150,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,700× the energy of this one
  4. This earthquake M 3.3 about 1.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.4× 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 32.5917, -117.2900. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Diego County, CA 68 km (42 mi) SW 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

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

  1. 1.5 5km ESE of Chula Vista, CA
  2. 1.6 5km NE of San Ysidro, CA
  3. 1.6 6km NNW of Lakeside, CA
  4. 1.7 30km WSW of La Jolla, CA
  5. 1.7 18km WSW of La Jolla, CA
  6. 1.6 5km NE of Rancho San Diego, CA
  7. 1.6 4km NNE of San Ysidro, CA
  8. 1.6 3km NNE of San Ysidro, CA
  9. 1.6 6km NNW of Lakeside, CA
  10. 2.0 13km NW of Rosarito, B.C., MX
  11. 1.6 3km ENE of Rancho San Diego, CA
  12. 2.7 33km WSW of La Jolla, CA
  13. 1.6 5km SE of Chula Vista, CA
  14. 1.6 6km NNW of Lakeside, CA
  15. 1.6 6km NE of Rancho San Diego, 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.