QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

18 km SW of Bynum, Montana

· 5.9 km deep · released about 8.1 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Teton County 15 kmPondera County 46 kmLewis and Clark County 82 kmGlacier County 102 kmCascade County 104 kmToole County 104 kmPowell County 117 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 1.6 (ml)
Depth
5.9 km below the surface
Felt
no reports yet
Nearest
Teton County, 15 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 911 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 8.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 8.1 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 47.8547, -112.4767. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Teton County, MT 15 km (9 mi) WNW of here earthquakes near Teton County
Pondera County, MT 46 km (28 mi) SSW of here earthquakes near Pondera County
Lewis and Clark County, MT 82 km (51 mi) N of here earthquakes near Lewis and Clark County
Glacier County, MT 102 km (63 mi) SSE of here earthquakes near Glacier County
Cascade County, MT 104 km (64 mi) NW of here earthquakes near Cascade County
Toole County, MT 104 km (64 mi) SSW of here earthquakes near Toole 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. 1.5 26 km W of Augusta, Montana
  2. 1.6 24 km W of Augusta, 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.