QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

Earthquake near Kalispell, MT

No earthquake was likely felt in Kalispell in the 24 hours to 3:12 pm MST (22:12 UTC). The last one was M 2.6, 22 km (13 mi) NNW, at 1:53 am MST on 1 March 2021, estimated intensity II (weak) in town. Every earthquake near Kalispell

This page: a magnitude 1.8 earthquake was recorded 28 km (18 mi) south-southwest of Kalispell, MT, at 6:59 am MST on 23 November 2024 (13:59 UTC), 7.7 km deep.

USGS: 6 km WNW of Lake Mary Ronan, Montana

6:59 am MST, Nov 23, 2024 · · 7.7 km deep · released about 13 lb of TNT

10 km30 km60 km120 km N Lake County 47 kmFlathead County 48 kmSanders County 57 kmLincoln County 98 kmMineral County 104 kmMissoula County 114 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
6:59 am MST on 23 November 2024 ()
Where
28 km (18 mi) south-southwest of Kalispell, MT · earthquakes near Kalispell
Montana today
every earthquake in Montana in the last 24 hours
Magnitude
M 1.8 (ml)
Depth
7.7 km below the surface
Felt
no reports yet
Nearest
Lake County, 47 km SE
Nearest mapped fault
Mission fault, 15 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 718 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 10 km (6 mi) from the epicentre. In Kalispell, 28 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.

Earthquakes near other towns within 30 km: Lakeside, Somers.

How big was it?

This earthquake released about 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 47.9683, -114.4802. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Lake County, MT 47 km (29 mi) SE earthquakes near Lake County
Flathead County, MT 48 km (30 mi) NE earthquakes near Flathead County
Sanders County, MT 57 km (36 mi) WSW earthquakes near Sanders County
Lincoln County, MT 98 km (61 mi) NW earthquakes near Lincoln County
Mineral County, MT 104 km (64 mi) SSW earthquakes near Mineral County
Missoula County, MT 114 km (71 mi) SSE earthquakes near Missoula County

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

Aftershocks so far

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

  1. 1.2 3 km E of Somers, Montana
  2. 1.4 4 km NE of Bear Dance, Montana
  3. 1.8 3 km NE of Bear Dance, Montana
  4. 1.1 2 km E of Bear Dance, Montana
  5. 1.7 19 km SW of Marion, Montana
  6. 2.3 18 km SW of Marion, Montana
  7. 2.0 19 km SW of Marion, Montana
  8. 2.4 9 km SSW of Bear Dance, Montana
  9. 1.6 1 km SSW of Dayton, Montana
  10. 1.8 12 km NE of Forest Hill Village, Montana
  11. 1.9 12 km ESE of Evergreen, Montana
  12. 1.6 6 km SW of Woods Bay, Montana
  13. 1.7 1 km S of Woods Bay, Montana
  14. 2.1 6 km SW of Woods Bay, Montana
  15. 1.6 6 km SW of Woods Bay, 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.