QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

13 km ESE of Ovando, Montana

· 11 km deep · released about 98 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Powell County 17 kmLewis and Clark County 46 kmMissoula County 71 kmGranite County 76 kmDeer Lodge County 101 kmTeton County 105 kmLake County 111 kmJefferson 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
Magnitude
M 2.3 (ml)
Depth
11 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Powell County, 17 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1540 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 98 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 150,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 110,000× the energy of this one
  3. Around the size people start to feel M 3.0 9.8× the energy of this one
  4. This earthquake M 2.3 about 98 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.

Where

Epicentre 46.9942, -112.9590. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Powell County, MT 17 km (10 mi) N of here earthquakes near Powell County
Lewis and Clark County, MT 46 km (29 mi) WSW of here earthquakes near Lewis and Clark County
Missoula County, MT 71 km (44 mi) E of here earthquakes near Missoula County
Granite County, MT 76 km (47 mi) NNE of here earthquakes near Granite County
Deer Lodge County, MT 101 km (63 mi) N of here earthquakes near Deer Lodge County
Teton County, MT 105 km (65 mi) SSW of here earthquakes near Teton County

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

Aftershocks so far

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

  1. 1.8 20 km SSE of Lincoln, Montana
  2. 1.7 10 km ESE of Ovando, Montana
  3. 2.1 18 km SSE of Lincoln, Montana
  4. 2.3 Western Montana
  5. 2.2 12 km ESE of Lincoln, Montana
  6. 1.5 20 km ENE of Seeley Lake, Montana
  7. 1.7 19 km NNW of Marysville, Montana
  8. 1.5 11 km ESE of Lincoln, Montana
  9. 2.3 Western Montana
  10. 1.7 11 km SE of Lincoln, Montana
  11. 1.8 14 km SE of Lincoln, Montana
  12. 1.5 39 km NNE of Ovando, Montana
  13. 2.5 25 km ENE of Seeley Lake, Montana
  14. 2.5 8 km SE of Lincoln, Montana
  15. 1.9 8 km SE of Lincoln, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.8 on 2017-07-06 — it released about 150,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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