QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Thompson Falls, MT

USGS: 20 km ENE of Trout Creek, Montana

8:20 pm MDT, Jul 10, 2016 · · 6.0 km deep · released about 12 lb of TNT

Every earthquake near Thompson Falls Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sanders County 25 kmLincoln County 69 kmShoshone County 76 kmMineral County 92 kmLake County 102 kmBonner County 103 kmKootenai County 103 kmFlathead County 106 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
8:20 pm MDT on 10 July 2016 ()
Where
38 km (24 mi) N of Thompson Falls, MT · earthquakes near Thompson Falls
Magnitude
M 1.7 (ml)
Depth
6.0 km below the surface
Felt
no reports yet
Nearest
Sanders County, 25 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3735 days ago

A magnitude 1.7 earthquake was recorded 38 km (24 mi) N of Thompson Falls, MT, at 8:20 pm MDT on 10 July 2016 (02:20 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 12 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 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 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 47.9387, -115.3718. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Sanders County, MT 25 km (15 mi) SE earthquakes near Sanders County
Lincoln County, MT 69 km (43 mi) N earthquakes near Lincoln County
Shoshone County, ID 76 km (47 mi) SSW earthquakes near Shoshone County
Mineral County, MT 92 km (57 mi) SSE earthquakes near Mineral County
Lake County, MT 102 km (63 mi) ESE earthquakes near Lake County
Bonner County, ID 103 km (64 mi) WNW earthquakes near Bonner County

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

Aftershocks so far

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

  1. 1.7 19 km SW of Marion, Montana
  2. 2.3 18 km SW of Marion, Montana
  3. 2.0 19 km SW of Marion, Montana
  4. 1.7 21 km SSE of Happys Inn, Montana
  5. 2.4 23 km ENE of Noxon, Montana
  6. 2.0 17 km W of Niarada, Montana
  7. 1.8 3 km NW of Happys Inn, Montana
  8. 2.6 4 km NW of Happys Inn, Montana
  9. 1.8 17 km WNW of Niarada, Montana
  10. 2.2 16 km ENE of Happys Inn, Montana
  11. 1.7 18 km NW of Marion, Montana
  12. 1.7 6 km S of Happys Inn, Montana
  13. 2.1 22 km NNE of Trout Creek, Montana
  14. 1.7 2 km NNW of Happys Inn, Montana
  15. 1.7 20 km ENE of Trout Creek, 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.