Earthquake near Bozeman, MT

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 10 km (6 mi) from the epicentre. In Bozeman, 48 km away, the estimate is intensity I (not felt). 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.

Earthquakes near other towns within 30 km: Three Forks, Manhattan.

How big was it?

This earthquake released about 7.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
3. Around the size people start to feel M 3.0 130× the energy of this one
4. This earthquake M 1.6 about 7.3 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 4.2 on 2019-08-16 — about 8,200 times the energy of this one.

Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:

1. 6.6 The 1925 Clarkston Valley, Montana Earthquake · 10 km NW of this epicentre Jun 28, 1925
2. 6.4 Clarkston Valley, Montana (Aftershock) · 10 km NW of this epicentre Jun 28, 1925
3. 5.5 Clarkston Valley, Montana (Aftershock) · 10 km NW of this epicentre Jun 28, 1925
4. 5.5 Clarkston Valley, Montana (Aftershock) · 10 km NW of this epicentre Jun 28, 1925
5. 5.5 Clarkston Valley, Montana (Aftershock) · 10 km NW of this epicentre Jul 10, 1925

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 46.0200, -111.4110. 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. 2.4 10 km E of Toston, Montana 14:45 UTC
2. 1.8 8 km S of Ponderosa Pines, Montana 21:53 UTC
3. 2.1 8 km S of Ponderosa Pines, Montana 19:22 UTC
4. 2.9 6 km S of Ponderosa Pines, Montana 07:11 UTC
5. 1.6 7 km SSW of The Silos, Montana 19:15 UTC
6. 2.0 4 km ESE of Three Forks, Montana 10:41 UTC
7. 2.4 7 km NW of Willow Creek, Montana 15:52 UTC
8. 1.7 7 km SSW of The Silos, Montana 22:14 UTC
9. 1.9 8 km WSW of Townsend, Montana 20:38 UTC
10. 1.5 10 km NNE of Three Forks, Montana 09:14 UTC
11. 1.8 4 km WNW of Ponderosa Pines, Montana 06:02 UTC
12. 1.6 8 km W of Townsend, Montana 22:05 UTC
13. 2.2 11 km S of Radersburg, Montana 15:15 UTC
14. 1.5 6 km SSW of The Silos, Montana 19:22 UTC
15. 1.8 6 km NNW of Logan, Montana 18:40 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 21:26 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.