QuakeIndex

explosion · reviewed by a seismologist

M 2.2md

8 km NW of Ponderay, Idaho

· -1.0 km deep · released about 69 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Bonner County 5 kmBoundary County 46 kmPend Oreille County 50 kmKootenai County 77 kmLincoln County 87 kmStevens County 92 kmSpokane County 102 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 2.2 (md)
Depth
-1.0 km below the surface
Felt
no reports yet
Nearest
Bonner County, 5 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 387 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 69 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 220,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 150,000× the energy of this one
  3. Around the size people start to feel M 3.0 14× the energy of this one
  4. This earthquake M 2.2 about 69 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 48.3668, -116.6067. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Bonner County, ID 5 km (3 mi) NNE of here earthquakes near Bonner County
Boundary County, ID 46 km (28 mi) S of here earthquakes near Boundary County
Pend Oreille County, WA 50 km (31 mi) ESE of here earthquakes near Pend Oreille County
Kootenai County, ID 77 km (48 mi) N of here earthquakes near Kootenai County
Lincoln County, MT 87 km (54 mi) WSW of here earthquakes near Lincoln County
Stevens County, WA 92 km (57 mi) E of here earthquakes near Stevens County

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

Aftershocks so far

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

  1. 2.3 2 km NE of Dover, Idaho
  2. 2.2 8 km WNW of Dover, Idaho
  3. 1.6 13 km NNW of Athol, Idaho
  4. 1.9 6 km NNW of Priest River, Idaho
  5. 2.1 12 km NNW of Kootenai, Idaho
  6. 1.6 11 km NNW of Kootenai, Idaho
  7. 2.1 7 km WSW of Clark Fork, Idaho
  8. 1.6 18 km N of Kootenai, Idaho

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.