Earthquake · reviewed by a seismologist
M 2.4ml
32 km ENE of Wilsall, Montana
- When
- Magnitude
- M 2.4 (ml)
- Depth
- 5.0 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Sweet Grass County, 47 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3189 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 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
- Magna, Utah 2020 M 5.7 89,000× the energy of this one
- Around the size people start to feel M 3.0 7.9× the energy of this one
- This earthquake M 2.4 about 120 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 46.1531, -110.3013. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Sweet Grass County, MT | 47 km (29 mi) | NW of here | earthquakes near Sweet Grass County |
| Wheatland County, MT | 51 km (32 mi) | SW of here | earthquakes near Wheatland County |
| Meagher County, MT | 68 km (42 mi) | SE of here | earthquakes near Meagher County |
| Park County, MT | 79 km (49 mi) | NNE of here | earthquakes near Park County |
| Stillwater County, MT | 90 km (56 mi) | NW of here | earthquakes near Stillwater County |
| Golden Valley County, MT | 90 km (56 mi) | WSW of here | earthquakes near Golden Valley County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
4 earthquakes have been recorded within 50 km since this one.
- 1.8 23 km ENE of Wilsall, Montana
- 2.2 30 km ENE of Wilsall, Montana
- 1.9 23 km SE of White Sulphur Springs, Montana
- 2.7 32 km NE of Wilsall, 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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.