QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

32 km SSW of Anaconda, Montana

· 5.0 km deep · released about 8.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Deer Lodge County 24 kmSilver Bow County 39 kmGranite County 61 kmRavalli County 76 kmBeaverhead County 86 kmJefferson County 89 kmPowell County 108 kmMadison County 115 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
5.0 km below the surface
Felt
no reports yet
Nearest
Deer Lodge County, 24 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 95 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 8.7 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 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 45.8820, -113.1577. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Deer Lodge County, MT 24 km (15 mi) S of here earthquakes near Deer Lodge County
Silver Bow County, MT 39 km (24 mi) W of here earthquakes near Silver Bow County
Granite County, MT 61 km (38 mi) SSE of here earthquakes near Granite County
Ravalli County, MT 76 km (47 mi) ESE of here earthquakes near Ravalli County
Beaverhead County, MT 86 km (53 mi) NNW of here earthquakes near Beaverhead County
Jefferson County, MT 89 km (55 mi) WSW of here earthquakes near Jefferson 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. 2.7 10 km WNW of Wisdom, 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.