QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

southern Ontario, Canada

· 4.9 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Erie County 37 kmAshtabula County 70 kmChautauqua County 71 kmCrawford County 83 kmWarren County 103 kmLake County 106 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
4.9 km below the surface
Felt
2 reports · strongest reported intensity I
Nearest
Erie County, 37 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2062 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 42.4279, -80.2592. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Erie County, PA 37 km (23 mi) NNW of here earthquakes near Erie County
Ashtabula County, OH 70 km (44 mi) NE of here earthquakes near Ashtabula County
Chautauqua County, NY 71 km (44 mi) WNW of here earthquakes near Chautauqua County
Crawford County, PA 83 km (52 mi) N of here earthquakes near Crawford County
Warren County, PA 103 km (64 mi) NW of here earthquakes near Warren County
Lake County, OH 106 km (66 mi) NE of here earthquakes near Lake County

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

Aftershocks so far

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

  1. 2.3 7 km SE of Northwest Harborcreek, Pennsylvania
  2. 2.4 32 km SE of Jarvis, 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

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