Earthquake · reviewed by a seismologist
M 0.8ml
Earthquake near West Yellowstone, MT
USGS: 25 km SSE of West Yellowstone, Montana
- When
- 7:33 pm MDT on 1 October 2026 ()
- Where
- 26 km (16 mi) SSE of West Yellowstone, MT · earthquakes near West Yellowstone
- Magnitude
- M 0.8 (ml)
- Depth
- 5.2 km below the surface
- Felt
- no reports yet
- Nearest
- Fremont County, 46 km WSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 8 hours ago
A magnitude 0.8 earthquake was recorded 26 km (16 mi) SSE of West Yellowstone, MT, at 7:33 pm MDT on 1 October 2026 (01:33 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 0.55 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 1.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 28,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 19,000,000× the energy of this one
- Around the size people start to feel M 3.0 1,700× the energy of this one
- This earthquake M 0.8 about 0.55 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 190,000 times the energy of this one.
Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:
- 7.2 The 1959 Hebgen Lake, Montana Earthquake · 42 km NNW of this epicentre
- 6.5 14 km N of Madison Junction, Wyoming · 37 km NNE of this epicentre
- 6.3 22 km SW of Mammoth, Wyoming · 42 km NNE of this epicentre
- 6.0 21 km E of West Yellowstone, Montana · 26 km NNE of this epicentre
- 5.9 26 km SSE of Mammoth, Wyoming · 46 km NE 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 44.4433, -110.9980. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Fremont County, ID | 46 km (29 mi) | WSW | earthquakes near Fremont County |
| Teton County, WY | 63 km (39 mi) | SE | earthquakes near Teton County |
| Teton County, ID | 78 km (48 mi) | SSW | earthquakes near Teton County |
| Madison County, ID | 90 km (56 mi) | SW | earthquakes near Madison County |
| Clark County, ID | 109 km (68 mi) | W | earthquakes near Clark County |
| Park County, WY | 112 km (69 mi) | E | earthquakes near Park County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
No further earthquakes have 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.