Earthquake · reviewed by a seismologist
M 3.2ml
3 km NE of Seeley Lake, Montana
- When
- Magnitude
- M 3.2 (ml)
- Depth
- 20 km below the surface
- Felt
- 7 reports · strongest reported intensity II
- Nearest
- Missoula County, 39 km WSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 5 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 7 people have reported feeling it to USGS.
How big was it?
This earthquake released about 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 180,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
- Magna, Utah 2020 M 5.7 5,600× the energy of this one
- This earthquake M 3.2 about 1,900 lb of TNT
- Around the size people start to feel M 3.0 this one released 2× more
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 47.1965, -113.4473. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Missoula County, MT | 39 km (24 mi) | ENE of here | earthquakes near Missoula County |
| Powell County, MT | 55 km (34 mi) | NW of here | earthquakes near Powell County |
| Lake County, MT | 69 km (43 mi) | SE of here | earthquakes near Lake County |
| Lewis and Clark County, MT | 81 km (50 mi) | W of here | earthquakes near Lewis and Clark County |
| Granite County, MT | 89 km (55 mi) | N of here | earthquakes near Granite County |
| Teton County, MT | 112 km (69 mi) | SW of here | earthquakes near Teton County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
1 earthquake has been recorded within 50 km since this one.
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.