QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Earthquake near Missoula, MT

No earthquake was likely felt in Missoula in the 24 hours to 10:36 am MST (17:36 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 1.6 earthquake was recorded 49 km (31 mi) east of Missoula, MT, at 6:56 pm MST on 11 January 2019 (01:56 UTC), 7.7 km deep.

USGS: 23 km SW of Ovando, Montana

52 km (32 mi) E of Missoula, MT

6:56 pm MST, Jan 11, 2019 · · 7.7 km deep · released about 8.1 lb of TNT

10 km30 km60 km120 km N Powell County 31 kmMissoula County 46 kmGranite County 52 kmLewis and Clark County 78 kmDeer Lodge County 86 kmLake County 103 kmRavalli County 105 kmSilver Bow County 119 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
6:56 pm MST on 11 January 2019 ()
Where
49 km (31 mi) east of Missoula, MT · earthquakes near Missoula
Montana today
every earthquake in Montana in the last 24 hours
Magnitude
M 1.6 (ml)
Depth
7.7 km below the surface
Felt
no reports yet
Nearest
Powell County, 31 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2860 days ago

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 8 km (5 mi) from the epicentre. In Missoula, 49 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: Clinton.

How big was it?

This earthquake released about 8.1 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 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 8.1 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 46.8600, -113.3433. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Powell County, MT 31 km (20 mi) E earthquakes near Powell County
Missoula County, MT 46 km (28 mi) WNW earthquakes near Missoula County
Granite County, MT 52 km (32 mi) S earthquakes near Granite County
Lewis and Clark County, MT 78 km (49 mi) ENE earthquakes near Lewis and Clark County
Deer Lodge County, MT 86 km (54 mi) S earthquakes near Deer Lodge County
Lake County, MT 103 km (64 mi) NNW earthquakes near Lake County

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

Aftershocks so far

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

  1. 1.5 20 km ENE of Seeley Lake, Montana
  2. 2.5 25 km ENE of Seeley Lake, Montana
  3. 1.8 2 km S of Turah, Montana
  4. 1.6 10 km WSW of Drummond, Montana
  5. 2.4 21 km ENE of Seeley Lake, Montana
  6. 1.6 21 km NE of Drummond, Montana
  7. 1.7 15 km WSW of Drummond, Montana
  8. 2.3 13 km ESE of Ovando, Montana
  9. 1.5 21 km NNW of Drummond, Montana
  10. 2.1 16 km ESE of Ovando, Montana
  11. 2.8 17 km ESE of Ovando, Montana
  12. 1.6 6 km NW of Drummond, Montana
  13. 1.8 12 km SE of Seeley Lake, Montana
  14. 1.5 4 km S of Drummond, Montana
  15. 2.0 25 km NE of Ovando, 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.