Earthquake · reviewed by a seismologist
M 1.6ml
11 km NNE of Dillon, Montana
- When
- Magnitude
- M 1.6 (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 152 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 7.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- This earthquake M 1.6 about 7.1 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 45.3128, -112.5882. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Beaverhead County, MT | 31 km (19 mi) | NE of here | earthquakes near Beaverhead County |
| Madison County, MT | 53 km (33 mi) | W of here | earthquakes near Madison County |
| Silver Bow County, MT | 65 km (40 mi) | S of here | earthquakes near Silver Bow County |
| Deer Lodge County, MT | 97 km (60 mi) | SSE of here | earthquakes near Deer Lodge County |
| Jefferson County, MT | 99 km (62 mi) | SSW of here | earthquakes near Jefferson County |
| Lemhi County, ID | 111 km (69 mi) | ENE of here | earthquakes near Lemhi County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
5 earthquakes have been recorded within 50 km since this one.
- 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
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.
For this area
The largest earthquake within 50 km in our catalogue was M 4.1 on 2024-10-07 — it released about 6,000 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
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.