QuakeIndex

explosion · reviewed by a seismologist

M 2.1ml

2 km W of Rockford Bay, Idaho

· -0.7 km deep · released about 37 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kootenai County 25 kmBenewah County 38 kmSpokane County 39 kmLatah County 78 kmShoshone County 79 kmWhitman County 81 kmBonner County 94 kmLincoln County 113 kmPend Oreille County 118 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
-0.7 km below the surface
Felt
no reports yet
Nearest
Kootenai County, 25 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1144 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 37 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 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 47.5052, -116.9147. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kootenai County, ID 25 km (16 mi) SW of here earthquakes near Kootenai County
Benewah County, ID 38 km (24 mi) NNW of here earthquakes near Benewah County
Spokane County, WA 39 km (24 mi) ESE of here earthquakes near Spokane County
Latah County, ID 78 km (48 mi) N of here earthquakes near Latah County
Shoshone County, ID 79 km (49 mi) WNW of here earthquakes near Shoshone County
Whitman County, WA 81 km (51 mi) NE of here earthquakes near Whitman County

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

Aftershocks so far

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

  1. 1.9 2 km NE of Fairwood, Washington
  2. 2.1 4 km NW of Rockford Bay, Idaho
  3. 2.2 2 km NW of Mead, Washington
  4. 1.8 7 km SSW of Tekoa, Washington
  5. 1.8 6 km SSW of Athol, Idaho
  6. 1.6 7 km SSE of Saint Maries, Idaho
  7. 1.7 6 km SE of Spangle, Washington
  8. 1.6 3 km ESE of Veradale, Washington
  9. 1.7 4 km SSW of Liberty Lake, Washington
  10. 1.6 13 km SSE of Liberty Lake, Washington
  11. 2.0 3 km N of Harrison, Idaho
  12. 1.8 2 km NNE of Fairwood, Washington
  13. 2.3 2 km NNE of Fairwood, Washington
  14. 2.1 10 km SSW of Saint Maries, Idaho
  15. 1.9 4 km SSE of Saint Maries, 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

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