QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

7 km SSW of Orofino, Idaho

· 1.6 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lewis County 23 kmNez Perce County 37 kmLatah County 56 kmClearwater County 56 kmAsotin County 77 kmIdaho County 90 kmBenewah County 93 kmGarfield County 96 kmShoshone County 108 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
1.6 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Lewis County, 23 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 327 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 46.4185, -116.2906. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lewis County, ID 23 km (14 mi) NNE of here earthquakes near Lewis County
Nez Perce County, ID 37 km (23 mi) ENE of here earthquakes near Nez Perce County
Latah County, ID 56 km (35 mi) SE of here earthquakes near Latah County
Clearwater County, ID 56 km (35 mi) WSW of here earthquakes near Clearwater County
Asotin County, WA 77 km (48 mi) ENE of here earthquakes near Asotin County
Idaho County, ID 90 km (56 mi) NW of here earthquakes near Idaho County

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

Aftershocks so far

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

  1. 1.9 7 km WSW of Deary, Idaho
  2. 1.9 7 km ENE of Troy, 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.