Earthquake · reviewed by a seismologist
M 2.1ml
32 km S of Virginia City, Montana
Yes. A magnitude 2.1 earthquake was recorded 32 km S of Virginia City, Montana, at 11:47 am MDT on 10 May 2022 (17:47 UTC), 5.8 km deep.
- When
- Montana today
- every earthquake in Montana in the last 24 hours
- Magnitude
- M 2.1 (ml)
- Depth
- 5.8 km below the surface
- Felt
- no reports yet
- Nearest
- Madison County, 35 km N
- Nearest mapped fault
- Madison fault, 23 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 1646 days ago
Earthquake alerts for Big Sky, MT
Get a notification in this browser when USGS records an earthquake near Big Sky, 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 16 km (10 mi) from the epicentre. 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 37 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 410,000× the energy of this one
- Magna, Utah 2020 M 5.7 290,000× the energy of this one
- Around the size people start to feel M 3.0 26× the energy of this one
- This earthquake M 2.1 about 37 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 4.3 on 2016-06-13 — about 2,600 times the energy of this one.
Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:
- 6.1 30 km SSW of Big Sky, Montana · 26 km E of this epicentre
- 5.2 32 km WNW of Hebgen Lake Estates, Montana · 29 km ESE of this epicentre
- 5.2 26 km WNW of Hebgen Lake Estates, Montana · 35 km ESE of this epicentre
- 5.0 31 km W of Hebgen Lake Estates, Montana · 31 km SE of this epicentre
- 5.0 39 km W of Hebgen Lake Estates, Montana · 37 km SSE 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 45.0082, -111.8830. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Madison County, MT | 35 km (22 mi) | N | earthquakes near Madison County |
| Gallatin County, MT | 80 km (50 mi) | NE | earthquakes near Gallatin County |
| Beaverhead County, MT | 81 km (50 mi) | W | earthquakes near Beaverhead County |
| Clark County, ID | 88 km (55 mi) | SSW | earthquakes near Clark County |
| Fremont County, ID | 93 km (58 mi) | SSE | earthquakes near Fremont County |
| Silver Bow County, MT | 116 km (72 mi) | NNW | earthquakes near Silver Bow County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
54 earthquakes have been recorded within 50 km since this one.
- 1.6 28 km S of Ennis, Montana
- 1.6 34 km S of Virginia City, Montana
- 2.3 34 km S of Virginia City, Montana
- 1.5 28 km SE of Virginia City, Montana
- 2.4 27 km W of Hebgen Lake Estates, Montana
- 1.7 30 km NW of Hebgen Lake Estates, Montana
- 1.6 36 km NNE of Spencer, Idaho
- 2.0 38 km NNE of Spencer, Idaho
- 1.7 37 km SSE of Virginia City, Montana
- 1.9 29 km WNW of Hebgen Lake Estates, Montana
- 1.8 29 km NNE of Spencer, Idaho
- 1.5 17 km ESE of Dillon, Montana
- 1.5 29 km NNE of Spencer, Idaho
- 1.5 43 km NE of Spencer, Idaho
- 2.1 34 km S of Virginia City, 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.