QuakeIndex

explosion · reviewed by a seismologist

M 1.9ml

7 km ENE of Troy, Idaho

· -0.9 km deep · released about 22 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Latah County 8 kmNez Perce County 47 kmBenewah County 51 kmLewis County 61 kmWhitman County 68 kmGarfield County 75 kmAsotin County 77 kmClearwater County 78 kmShoshone County 89 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 1.9 (ml)
Depth
-0.9 km below the surface
Felt
no reports yet
Nearest
Latah County, 8 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 340 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 22 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 680,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 480,000× the energy of this one
  3. Around the size people start to feel M 3.0 43× the energy of this one
  4. This earthquake M 1.9 about 22 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 46.7563, -116.6722. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Latah County, ID 8 km (5 mi) SSE of here earthquakes near Latah County
Nez Perce County, ID 47 km (29 mi) N of here earthquakes near Nez Perce County
Benewah County, ID 51 km (32 mi) S of here earthquakes near Benewah County
Lewis County, ID 61 km (38 mi) NNW of here earthquakes near Lewis County
Whitman County, WA 68 km (42 mi) ESE of here earthquakes near Whitman County
Garfield County, WA 75 km (47 mi) ENE of here earthquakes near Garfield County

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

Aftershocks so far

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

  1. 2.1 5 km ENE of Pullman, Washington
  2. 2.3 9 km ESE of Princeton, Idaho
  3. 1.7 4 km E of Uniontown, Washington
  4. 2.3 4 km ENE of Pullman, Washington
  5. 2.3 5 km SSW of Moscow, Idaho
  6. 1.7 6 km WSW of Troy, Idaho
  7. 1.6 8 km SSE of Pullman, Washington
  8. 2.1 2 km SSE of Lewiston Orchards, Idaho
  9. 2.2 8 km SW of Potlatch, Idaho
  10. 2.2 2 km NE of Lewiston Orchards, Idaho
  11. 1.6 10 km ESE of Moscow, Idaho
  12. 1.9 7 km WSW of Deary, 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.