QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

40 km NNW of Keswick Ridge, Canada

· 5.0 km deep · released about 5.4 lb of TNT

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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
5.0 km below the surface
Felt
no reports yet
Nearest
Aroostook County, 126 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1442 days ago

A magnitude 1.5 earthquake was recorded 40 km NNW of Keswick Ridge, Canada at 23:29 UTC on 2022-08-11. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 5.4 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 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 46.3418, -67.0534. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aroostook County, ME 126 km (78 mi) WNW earthquakes near Aroostook 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. 1.9 69 km ENE of Florenceville-Bristol, Canada
  2. 1.8 60 km ENE of Florenceville-Bristol, Canada
  3. 1.9 20 km E of Florenceville-Bristol, Canada
  4. 2.2 7 km NNW of Fredericton, Canada
  5. 1.7 35 km NNW of Keswick Ridge, Canada
  6. 2.0 36 km NNE of Florenceville-Bristol, Canada
  7. 1.6 41 km E of Florenceville-Bristol, Canada
  8. 1.7 36 km NNW of Keswick Ridge, Canada
  9. 1.9 62 km ENE of Florenceville-Bristol, 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.