QuakeIndex

explosion · reviewed by a seismologist

M 2.1ml

3 km NNW of Saint Maries, Idaho

· -0.7 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Benewah County 15 kmKootenai County 38 kmShoshone County 52 kmLatah County 60 kmSpokane County 69 kmWhitman County 87 kmClearwater County 102 kmBonner County 109 kmNez Perce 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
-0.7 km below the surface
Felt
no reports yet
Nearest
Benewah County, 15 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1972 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 51 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 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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 47.3455, -116.5762. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Benewah County, ID 15 km (9 mi) NNE of here earthquakes near Benewah County
Kootenai County, ID 38 km (24 mi) SSE of here earthquakes near Kootenai County
Shoshone County, ID 52 km (32 mi) W of here earthquakes near Shoshone County
Latah County, ID 60 km (37 mi) NNE of here earthquakes near Latah County
Spokane County, WA 69 km (43 mi) ESE of here earthquakes near Spokane County
Whitman County, WA 87 km (54 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

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

  1. 2.1 4 km NW of Rockford Bay, Idaho
  2. 1.6 7 km SSE of Saint Maries, Idaho
  3. 1.6 13 km SSE of Liberty Lake, Washington
  4. 2.1 6 km N of Onaway, Idaho
  5. 2.0 3 km N of Harrison, Idaho
  6. 2.1 10 km SSW of Saint Maries, Idaho
  7. 1.9 4 km SSE of Saint Maries, Idaho
  8. 2.0 4 km E of Plummer, Idaho
  9. 1.6 9 km NNE of Parkline, Idaho
  10. 1.6 4 km N of Rockford Bay, Idaho
  11. 1.9 4 km SW of Farmington, Washington
  12. 1.9 7 km S of Chatcolet, Idaho
  13. 1.6 7 km WNW of Rockford Bay, Idaho
  14. 2.1 2 km W of Rockford Bay, Idaho
  15. 1.9 3 km NE of Princeton, 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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