QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2ml

36 km W of Pinesdale, Montana

· 7.9 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Ravalli County 56 kmClearwater County 81 kmIdaho County 85 kmMineral County 88 kmMissoula County 93 kmGranite County 96 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 (ml)
Depth
7.9 km below the surface
Felt
no reports yet
Nearest
Ravalli County, 56 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 804 days ago

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

How big was it?

This earthquake released about 60 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 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 46.3887, -114.6807. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ravalli County, MT 56 km (35 mi) NW of here earthquakes near Ravalli County
Clearwater County, ID 81 km (50 mi) ESE of here earthquakes near Clearwater County
Idaho County, ID 85 km (53 mi) NE of here earthquakes near Idaho County
Mineral County, MT 88 km (55 mi) SSE of here earthquakes near Mineral County
Missoula County, MT 93 km (58 mi) SW of here earthquakes near Missoula County
Granite County, MT 96 km (60 mi) W of here earthquakes near Granite County

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

Aftershocks so far

1 earthquake has been recorded within 50 km since this one.

  1. 1.6 6 km N of Charlos Heights, Montana

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.