QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

9 km WSW of Port Colborne, Canada

· 3.8 km deep · released about 38 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Erie County 47 kmChautauqua County 61 kmNiagara County 63 kmCattaraugus County 88 kmWyoming County 92 kmGenesee County 94 kmErie County 103 kmOrleans County 106 kmWarren County 113 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 2.1 (ml)
Depth
3.8 km below the surface
Felt
18 reports · strongest reported intensity III
Nearest
Erie County, 47 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1962 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 18 people have reported feeling it to USGS.

How big was it?

This earthquake released about 38 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 42.8540, -79.3320. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Erie County, NY 47 km (29 mi) WNW of here earthquakes near Erie County
Chautauqua County, NY 61 km (38 mi) N of here earthquakes near Chautauqua County
Niagara County, NY 63 km (39 mi) SW of here earthquakes near Niagara County
Cattaraugus County, NY 88 km (54 mi) NW of here earthquakes near Cattaraugus County
Wyoming County, NY 92 km (57 mi) W of here earthquakes near Wyoming County
Genesee County, NY 94 km (59 mi) W of here earthquakes near Genesee County

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

Aftershocks so far

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

  1. 3.8 1 km NE of West Seneca, New York
  2. 2.4 32 km SE of Jarvis, Canada
  3. 2.3 1 km N of Wanakah, 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.