QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

Earthquake near Missoula, MT

No earthquake was likely felt in Missoula in the 24 hours to 5:15 pm MST (00:15 UTC). The last one was M 3.8, 76 km (47 mi) NE, at 4:46 am MDT on 5 July 2024, estimated intensity II (weak) in town; 131 felt reports to USGS. Every earthquake near Missoula

This page: a magnitude 2.9 earthquake was recorded 47 km (29 mi) east of Missoula, MT, at 8:06 am MDT on 15 August 2025 (14:06 UTC), 5.1 km deep.

USGS: 22 km WSW of Ovando, Montana

49 km (31 mi) E of Missoula, MT

8:06 am MDT, Aug 15, 2025 · · 5.1 km deep · released about 680 lb of TNT

10 km30 km60 km120 km N Powell County 35 kmMissoula County 41 kmGranite County 57 kmLewis and Clark County 79 kmDeer Lodge County 93 kmLake County 97 kmRavalli County 108 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
8:06 am MDT on 15 August 2025 ()
Where
47 km (29 mi) east of Missoula, MT · earthquakes near Missoula
Montana today
every earthquake in Montana in the last 24 hours
Magnitude
M 2.9 (ml)
Depth
5.1 km below the surface
Felt
no reports yet
Nearest
Powell County, 35 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 372 days ago

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 32 km (20 mi) from the epicentre. In Missoula, 47 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: Seeley Lake 31 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 46.9113, -113.3781. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Powell County, MT 35 km (22 mi) ESE earthquakes near Powell County
Missoula County, MT 41 km (26 mi) WNW earthquakes near Missoula County
Granite County, MT 57 km (36 mi) S earthquakes near Granite County
Lewis and Clark County, MT 79 km (49 mi) ENE earthquakes near Lewis and Clark County
Deer Lodge County, MT 93 km (58 mi) SSE earthquakes near Deer Lodge County
Lake County, MT 97 km (60 mi) NNW earthquakes near Lake County

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

Aftershocks so far

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

  1. 1.0 22 km N of Ovando, Montana
  2. 2.3 22 km N of Ovando, Montana
  3. 1.2 22 km SW of Ovando, Montana
  4. 1.1 27 km ENE of Seeley Lake, Montana
  5. 1.2 17 km WNW of Lincoln, Montana
  6. 3.1 5 km NW of Ovando, Montana
  7. 3.2 3 km NE of Seeley Lake, Montana
  8. 2.6 31 km ENE of Seeley Lake, Montana
  9. 2.1 25 km ENE of Seeley Lake, Montana
  10. 1.9 15 km N of Seeley Lake, Montana
  11. 1.7 16 km W of Lincoln, Montana
  12. 3.1 27 km NE of Seeley Lake, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.