Earthquake · reviewed by a seismologist
M 1.2ml
Earthquake near West Yellowstone, MT
No earthquake was likely felt in West Yellowstone in the 24 hours to 7:48 pm MDT (01:48 UTC). The last one was M 2.8, 11 km (7 mi) NNW, at 1:21 am MDT on 8 September 2026, estimated intensity II (weak) in town. Every earthquake near West Yellowstone
This page: a magnitude 1.2 earthquake was recorded 47 km (29 mi) east-northeast of West Yellowstone, MT, at 10:49 pm MDT on 24 October 2026 (04:49 UTC), 6.8 km deep.
USGS: 24 km SSE of Mammoth, Wyoming
- When
- 10:49 pm MDT on 24 October 2026 ()
- Where
- 47 km (29 mi) east-northeast of West Yellowstone, MT · earthquakes near West Yellowstone
- Magnitude
- M 1.2 (ml)
- Depth
- 6.8 km below the surface
- Felt
- no reports yet
- Nearest
- Park County, 75 km N
- Nearest mapped fault
- Mirror Plateau faults, 19 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 12 hours ago
Earthquake alerts for West Yellowstone, MT
Get a notification in this browser when USGS records an earthquake near West Yellowstone, 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 it was probably too small to be felt, even directly above it. 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 1.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 8,800,000× the energy of this one
- Magna, Utah 2020 M 5.7 6,200,000× the energy of this one
- Around the size people start to feel M 3.0 560× the energy of this one
- This earthquake M 1.2 about 1.7 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 4.4 on 2017-06-16 — about 61,000 times the energy of this one.
Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:
- 6.5 14 km N of Madison Junction, Wyoming · 28 km W of this epicentre
- 6.3 22 km SW of Mammoth, Wyoming · 26 km W of this epicentre
- 6.0 21 km E of West Yellowstone, Montana · 29 km WSW of this epicentre
- 5.9 26 km SSE of Mammoth, Wyoming · 7 km SW of this epicentre
- 5.7 13 km SSW of Mammoth, Wyoming · 19 km WNW 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 44.7870, -110.5332. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Park County, MT | 75 km (47 mi) | N | earthquakes near Park County |
| Park County, WY | 81 km (50 mi) | ESE | earthquakes near Park County |
| Teton County, WY | 83 km (51 mi) | S | earthquakes near Teton County |
| Gallatin County, MT | 95 km (59 mi) | NNW | earthquakes near Gallatin County |
| Fremont County, ID | 98 km (61 mi) | SW | earthquakes near Fremont County |
| Sweet Grass County, MT | 123 km (76 mi) | NNE | earthquakes near Sweet Grass 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.