QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7mb_lg

19 km SW of Winchester, Canada

· 10 km deep · released about 340 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N St. Lawrence County 62 kmFranklin County 103 kmJefferson 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 2.7 (mb_lg)
Depth
10 km below the surface
Felt
396 reports · strongest reported intensity IV
Nearest
St. Lawrence County, 62 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1949 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 396 people have reported feeling it to USGS.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 44.9518, -75.5209. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
St. Lawrence County, NY 62 km (39 mi) NW of here earthquakes near St. Lawrence County
Franklin County, NY 103 km (64 mi) WNW of here earthquakes near Franklin County
Jefferson County, NY 114 km (71 mi) NNE of here earthquakes near Jefferson County

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

Aftershocks so far

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

  1. 2.2 5 km SE of Osgoode, Canada
  2. 1.6 8 km NNE of Rensselaer Falls, New York
  3. 2.8 8 km NNW of Canton, New York
  4. 1.8 1 km W of Ogdensburg, New York
  5. 2.2 9 km WNW of Massena, New York
  6. 1.7 New York
  7. 2.2 5 km NNE of Morrisburg, Canada
  8. 1.8 7 km SE of Metcalfe, Canada
  9. 2.8 8 km WNW of Massena, New York

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.