Earthquake · reviewed by a seismologist
M 1.5ml
Earthquake near Dillon, MT
No earthquake was likely felt in Dillon in the 24 hours to 2:50 pm MST (21:50 UTC). The last one was M 2.0, 14 km (9 mi) N, at 2:45 pm MDT on 7 May 2026, estimated intensity II (weak) in town. Every earthquake near Dillon
This page: a magnitude 1.5 earthquake was recorded 12 km (8 mi) north of Dillon, MT, at 1:32 pm MDT on 20 July 2025 (19:32 UTC), 7.4 km deep.
USGS: 12 km N of Dillon, Montana
- When
- 1:32 pm MDT on 20 July 2025 ()
- Where
- 12 km (8 mi) north of Dillon, MT · earthquakes near Dillon
- Montana today
- every earthquake in Montana in the last 24 hours
- Magnitude
- M 1.5 (ml)
- Depth
- 7.4 km below the surface
- Felt
- no reports yet
- Nearest
- Beaverhead County, 31 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 478 days ago
Earthquake alerts for Dillon, MT
Get a notification in this browser when USGS records an earthquake near Dillon, 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 7 km (4 mi) from the epicentre. In Dillon, 12 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.
How big was it?
This earthquake released about 5.7 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 2,600,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
- Around the size people start to feel M 3.0 170× the energy of this one
- This earthquake M 1.5 about 5.7 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.
For this area
The largest earthquake within 50 km since 2016 was M 4.1 on 2024-10-07 — about 7,400 times the energy of this one.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.6 16 km N of Dillon, Montana · 5 km N 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 45.3232, -112.6083. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Beaverhead County, MT | 31 km (19 mi) | SW | earthquakes near Beaverhead County |
| Madison County, MT | 54 km (34 mi) | E | earthquakes near Madison County |
| Silver Bow County, MT | 64 km (40 mi) | N | earthquakes near Silver Bow County |
| Deer Lodge County, MT | 95 km (59 mi) | NNW | earthquakes near Deer Lodge County |
| Jefferson County, MT | 99 km (61 mi) | NNE | earthquakes near Jefferson County |
| Lemhi County, ID | 109 km (68 mi) | WSW | earthquakes near Lemhi County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
16 earthquakes have been recorded within 50 km since this one.
- 1.4 19 km N of Dillon, Montana
- 1.0 11 km WSW of Sheridan, Montana
- 2.1 15 km ENE of Twin Bridges, Montana
- 1.9 19 km NNE of Dillon, Montana
- 2.0 15 km NNE of Dillon, Montana
- 2.1 26 km SE of Dillon, Montana
- 2.3 14 km NNE of Twin Bridges, Montana
- 2.9 14 km NNE of Twin Bridges, Montana
- 1.8 14 km NNE of Twin Bridges, Montana
- 2.0 13 km N of Dillon, Montana
- 1.6 11 km NNE of Dillon, Montana
- 2.5 9 km NNE of Dillon, Montana
- 1.5 14 km NNE of Dillon, Montana
- 2.5 10 km NNE of Dillon, Montana
- 1.8 27 km SW of Dillon, 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.