QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Ontario-Quebec border region, Canada

· 10 km deep · released about 5.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Franklin County 68 kmSt. Lawrence County 73 kmClinton County 93 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 1.5 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Franklin County, 68 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2985 days ago

A magnitude 1.5 earthquake was recorded at Ontario-Quebec border region, Canada at 20:09 UTC on 2018-07-29. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Massena, Fort Covington Hamlet.

How big was it?

This earthquake released about 5.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.7 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 45.1078, -74.7730. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Franklin County, NY 68 km (42 mi) SSE earthquakes near Franklin County
St. Lawrence County, NY 73 km (45 mi) SSW earthquakes near St. Lawrence County
Clinton County, NY 93 km (58 mi) ESE earthquakes near Clinton County
Grand Isle County, VT 121 km (75 mi) ESE earthquakes near Grand Isle County
Essex County, NY 136 km (85 mi) SE earthquakes near Essex County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 2.0 7 km NE of Potsdam, New York
  2. 1.6 5 km S of Fort Covington Hamlet, New York
  3. 1.6 6 km ESE of Fort Covington Hamlet, New York
  4. 1.6 1 km S of Massena, New York
  5. 1.8 13 km SE of Hawkesbury, Canada
  6. 1.6 6 km SW of Rigaud, Canada
  7. 2.2 8 km W of Saint Regis Falls, New York
  8. 2.5 6 km SSE of Fort Covington Hamlet, New York
  9. 1.5 13 km SW of L'Orignal, Canada
  10. 1.8 6 km WNW of Huntingdon, Canada
  11. 2.1 8 km WNW of Huntingdon, Canada
  12. 3.1 6 km WNW of Huntingdon, Canada
  13. 1.9 8 km ESE of Fort Covington Hamlet, New York
  14. 1.6 Ontario-Quebec border region, Canada
  15. 2.1 7 km SW of Cornwall, 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

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