QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0mb_lg

3 km ENE of Morrisburg, Canada

· 12 km deep · released about 30 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N St. Lawrence County 47 kmFranklin County 74 kmClinton County 114 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 2.0 (mb_lg)
Depth
12 km below the surface
Felt
no reports yet
Nearest
St. Lawrence County, 47 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2907 days ago

A magnitude 2.0 earthquake was recorded 3 km ENE of Morrisburg, Canada at 08:52 UTC on 2018-08-06. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Norfolk, Massena, Norwood, Potsdam.

How big was it?

This earthquake released about 30 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 350,000× the energy of this one
  3. Around the size people start to feel M 3.0 32× the energy of this one
  4. This earthquake M 2.0 about 30 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 44.9075, -75.1352. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
St. Lawrence County, NY 47 km (29 mi) S earthquakes near St. Lawrence County
Franklin County, NY 74 km (46 mi) ESE earthquakes near Franklin County
Clinton County, NY 114 km (71 mi) E earthquakes near Clinton County
Jefferson County, NY 125 km (78 mi) SW earthquakes near Jefferson County
Essex County, NY 139 km (87 mi) SE earthquakes near Essex County

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

Aftershocks so far

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

  1. 2.0 7 km NE of Potsdam, New York
  2. 1.6 1 km S of Massena, New York
  3. 2.2 5 km SE of Osgoode, Canada
  4. 2.2 8 km W of Saint Regis Falls, New York
  5. 1.6 8 km NNE of Rensselaer Falls, New York
  6. 2.8 8 km NNW of Canton, New York
  7. 1.8 1 km W of Ogdensburg, New York
  8. 2.1 7 km SW of Cornwall, Canada
  9. 2.2 9 km WNW of Massena, New York
  10. 1.7 New York
  11. 2.2 5 km NNE of Morrisburg, Canada
  12. 1.8 7 km SE of Metcalfe, Canada
  13. 2.8 8 km WNW of Massena, New York
  14. 1.8 4 km S of Winthrop, New York
  15. 2.7 19 km SW of Winchester, 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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