Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near Belgrade, MT
No earthquake was likely felt in Belgrade in the 24 hours to 9:59 am MST (16:59 UTC). The last one was M 1.6, 8 km (5 mi) WSW, at 4:23 pm MDT on 28 September 2025, estimated intensity II (weak) in town. Every earthquake near Belgrade
This page: a magnitude 1.7 earthquake was recorded 47 km (29 mi) southwest of Belgrade, MT, at 10:33 pm MST on 11 January 2023 (05:33 UTC), 7.9 km deep.
USGS: 19 km NNE of Ennis, Montana
51 km (31 mi) WSW of Bozeman, MT
- When
- 10:33 pm MST on 11 January 2023 ()
- Where
- 47 km (29 mi) southwest of Belgrade, MT · earthquakes near Belgrade
- Montana today
- every earthquake in Montana in the last 24 hours
- Magnitude
- M 1.7 (ml)
- Depth
- 7.9 km below the surface
- Felt
- no reports yet
- Nearest
- Madison County, 29 km SW
- Nearest mapped fault
- Madison fault, 9 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1332 days ago
Earthquake alerts for Belgrade, MT
Get a notification in this browser when USGS records an earthquake near Belgrade, MT. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 9 km (6 mi) from the epicentre. In Belgrade, 47 km away, the estimate is intensity I (not felt). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
How big was it?
This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
- Around the size people start to feel M 3.0 89× the energy of this one
- This earthquake M 1.7 about 11 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.
For this area
The largest earthquake within 50 km since 2016 was M 4.2 on 2019-08-16 — about 5,600 times the energy of this one.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 45.5173, -111.6598. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Madison County, MT | 29 km (18 mi) | SW | earthquakes near Madison County |
| Gallatin County, MT | 39 km (24 mi) | E | earthquakes near Gallatin County |
| Jefferson County, MT | 74 km (46 mi) | NNW | earthquakes near Jefferson County |
| Park County, MT | 88 km (55 mi) | E | earthquakes near Park County |
| Silver Bow County, MT | 88 km (55 mi) | WNW | earthquakes near Silver Bow County |
| Broadwater County, MT | 91 km (57 mi) | N | earthquakes near Broadwater County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 2.0 4 km ESE of Three Forks, Montana
- 2.4 7 km NW of Willow Creek, Montana
- 2.0 7 km SE of Pony, Montana
- 1.5 29 km SE of Virginia City, Montana
- 1.8 6 km NNW of Logan, Montana
- 1.6 5 km NW of Logan, Montana
- 1.6 28 km S of Ennis, Montana
- 1.6 5 km NW of Logan, Montana
- 1.5 28 km SE of Virginia City, Montana
- 1.5 18 km W of Pony, Montana
- 2.5 13 km SSE of Harrison, Montana
- 2.8 0 km NW of Cardwell, Montana
- 2.4 2 km E of Three Forks, Montana
- 1.5 11 km N of Ennis, Montana
- 3.0 1 km N of Belgrade, 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.