Earthquake near West Yellowstone, MT

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 26 km (16 mi) from the epicentre. In West Yellowstone, 15 km away, the estimate is intensity II (weak). 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.

Likely felt in: West Yellowstone 15 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 490 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 31,000× the energy of this one
2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
3. Around the size people start to feel M 3.0 1.9× the energy of this one
4. This earthquake M 2.8 about 490 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 210 times the energy of this one.

Before 2016, the USGS record lists 16 earthquakes of M5 or more within 50 km; the five largest:

1. 7.2 The 1959 Hebgen Lake, Montana Earthquake · 11 km W of this epicentre Aug 18, 1959
2. 6.5 14 km N of Madison Junction, Wyoming · 14 km ESE of this epicentre Aug 18, 1959
3. 6.3 22 km SW of Mammoth, Wyoming · 16 km E of this epicentre Aug 18, 1959
4. 6.1 30 km SSW of Big Sky, Montana · 48 km NW of this epicentre Nov 23, 1947
5. 6.0 21 km E of West Yellowstone, Montana · 24 km SE of this epicentre Aug 19, 1959

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 44.7963, -111.0645. Map © OpenStreetMap contributors.

Nearby places

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

52 earthquakes have been recorded within 50 km since this one.

1. 1.7 18 km WNW of Hebgen Lake Estates, Montana 20:14 UTC
2. 2.3 18 km NW of Hebgen Lake Estates, Montana 20:14 UTC
3. 2.0 26 km W of Hebgen Lake Estates, Montana 20:42 UTC
4. 1.7 22 km ENE of West Yellowstone, Montana 03:44 UTC
5. 1.8 14 km E of Hebgen Lake Estates, Montana 08:44 UTC
6. 1.8 22 km ENE of West Yellowstone, Montana 00:51 UTC
7. 1.7 13 km NE of West Yellowstone, Montana 02:34 UTC
8. 1.7 5 km ESE of Hebgen Lake Estates, Montana 21:51 UTC
9. 1.7 4 km E of Hebgen Lake Estates, Montana 14:06 UTC
10. 1.8 3 km S of West Yellowstone, Montana 04:50 UTC
11. 1.8 20 km S of Mammoth, Wyoming 01:39 UTC
12. 1.9 6 km E of Hebgen Lake Estates, Montana 01:10 UTC
13. 1.6 5 km E of Hebgen Lake Estates, Montana 17:15 UTC
14. 1.6 7 km ESE of Hebgen Lake Estates, Montana 18:33 UTC
15. 2.1 6 km NNW of West Yellowstone, Montana 01:54 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 17:38 UTC. 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.