Earthquake · reviewed by a seismologist
M 2.4ml
Earthquake near Butte, MT
No earthquake was likely felt in Butte in the 24 hours to 7:48 am MST (14:48 UTC). The last one was M 2.0, 5 km (3 mi) E, at 12:56 pm MST on 9 November 2026, estimated intensity II (weak) in town. Every earthquake near Butte
This page: a magnitude 2.4 earthquake was recorded 42 km (26 mi) southeast of Butte, MT, at 11:27 am MDT on 4 September 2024 (17:27 UTC), less than 1 km deep.
USGS: 18 km NNE of Twin Bridges, Montana
- When
- 11:27 am MDT on 4 September 2024 ()
- Where
- 42 km (26 mi) southeast of Butte, MT · earthquakes near Butte
- Montana today
- every earthquake in Montana in the last 24 hours
- Magnitude
- M 2.4 (ml)
- Depth
- 0.2 km below the surface
- Felt
- no reports yet
- Nearest
- Silver Bow County, 40 km WNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 795 days ago
Earthquake alerts for Butte, MT
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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 21 km (13 mi) from the epicentre. In Butte, 42 km away, the estimate is intensity II (weak). 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.
Earthquakes near other towns within 30 km: Whitehall.
How big was it?
This earthquake released about 110 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 5.8 140,000× the energy of this one
- Magna, Utah 2020 M 5.7 99,000× the energy of this one
- Around the size people start to feel M 3.0 8.8× the energy of this one
- This earthquake M 2.4 about 110 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 4.0 on 2016-09-03 — about 310 times the energy of this one.
Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:
- 5.6 16 km N of Dillon, Montana · 48 km SW of this epicentre
- 5.4 Near Butte, Montana · 40 km NNW of this epicentre
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 45.6970, -112.2287. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Silver Bow County, MT | 40 km (25 mi) | WNW | earthquakes near Silver Bow County |
| Madison County, MT | 48 km (30 mi) | SSE | earthquakes near Madison County |
| Jefferson County, MT | 49 km (31 mi) | NNE | earthquakes near Jefferson County |
| Beaverhead County, MT | 81 km (51 mi) | SW | earthquakes near Beaverhead County |
| Deer Lodge County, MT | 83 km (52 mi) | WNW | earthquakes near Deer Lodge County |
| Gallatin County, MT | 85 km (53 mi) | ESE | earthquakes near Gallatin County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 1.9 5 km ENE of Butte, Montana
- 1.6 6 km E of Butte, Montana
- 1.8 5 km ESE of Walkerville, Montana
- 1.6 5 km E of Butte, Montana
- 1.6 5 km E of Butte, Montana
- 1.6 5 km E of Butte, Montana
- 1.5 4 km E of Butte, Montana
- 1.6 5 km E of Butte, Montana
- 1.6 5 km E of Butte, Montana
- 1.5 6 km ENE of Butte, Montana
- 1.9 6 km ENE of Butte, Montana
- 1.5 5 km E of Butte, Montana
- 1.5 1 km NNE of Twin Bridges, Montana
- 1.6 5 km ENE of Butte, Montana
- 1.6 5 km E of Butte, 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.