QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3mwr

15 km NW of St-Jean-Port-Joli, Canada

· 3.7 km deep · released about 1.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N
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 (mwr)
Depth
3.7 km below the surface
Felt
4 reports · strongest reported intensity III
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2508 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1.3 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 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× 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 47.3030, -70.4340. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.5 9 km ESE of La Malbaie, Canada
  2. 2.6 St. Lawrence Valley region, Quebec, Canada
  3. 1.9 17 km E of Baie-Saint-Paul, Canada
  4. 1.7 10 km WSW of La Malbaie, Canada
  5. 1.9 4 km N of Baie-Saint-Paul, Canada
  6. 2.2 15 km NNW of La Pocatière, Canada
  7. 1.9 11 km NW of Saint-Pacôme, Canada
  8. 2.2 13 km SW of La Malbaie, Canada
  9. 2.9 15 km NNW of La Pocati?re, Canada
  10. 1.8 17 km SSW of La Malbaie, Canada
  11. 2.0 9 km WNW of Saint-Pascal, Canada
  12. 2.3 10 km WSW of La Pocatière, Canada
  13. 2.3 11 km E of Baie-Saint-Paul, Canada
  14. 2.0 8 km SSW of La Malbaie, Canada
  15. 2.1 15 km ESE of Baie-Saint-Paul, Canada

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.