Earthquake · reviewed by a seismologist
M 1.5ml
14 km NNW of Emigrant, Montana
- When
- Magnitude
- M 1.5 (ml)
- Depth
- 17 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Park County, 22 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 458 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 5.9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,800,000× the energy of this one
- Around the size people start to feel M 3.0 160× the energy of this one
- This earthquake M 1.5 about 5.9 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 45.4883, -110.8125. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Park County, MT | 22 km (14 mi) | W of here | earthquakes near Park County |
| Gallatin County, MT | 28 km (17 mi) | E of here | earthquakes near Gallatin County |
| Sweet Grass County, MT | 76 km (47 mi) | WSW of here | earthquakes near Sweet Grass County |
| Madison County, MT | 88 km (55 mi) | ENE of here | earthquakes near Madison County |
| Broadwater County, MT | 108 km (67 mi) | SSE of here | earthquakes near Broadwater County |
| Stillwater County, MT | 113 km (70 mi) | W of here | earthquakes near Stillwater 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.
- 1.2 21 km ESE of Pray, Montana
- 1.7 4 km SW of Churchill, Montana
- 1.6 2 km E of Churchill, Montana
- 1.7 13 km S of Bozeman, 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.