84 km W of Miramichi, Canada

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
3. Around the size people start to feel M 3.0 11× the energy of this one
4. This earthquake M 2.3 about 85 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 46.9896, -66.6073. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 2.3 82 km W of Miramichi, Canada 21:31 UTC
2. 2.5 61 km SW of Bathurst, Canada 23:07 UTC
3. 1.9 69 km ENE of Florenceville-Bristol, Canada 21:10 UTC
4. 2.1 76 km W of Miramichi, Canada 06:11 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 11:34 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

• The official USGS event page — the source of record for every value above
• Did you feel it? Report it to USGS — reports go to USGS, not to us
• ShakeMap for this event, when USGS has produced one

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.