QuakeIndex

mining explosion · reviewed by a seismologist

M 3.2mb_lg

6 km N of Keewatin, Minnesota

· 0.0 km deep · released about 1,900 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Itasca County 40 kmSt. Louis County 44 kmAitkin County 99 kmCarlton County 100 kmKoochiching County 102 kmCass County 110 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 3.2 (mb_lg)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Itasca County, 40 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2607 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

USGS catalogues this as mining explosion, not an earthquake.

How big was it?

This earthquake released about 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 180,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 5,600× the energy of this one
  4. This earthquake M 3.2 about 1,900 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 2× more

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 47.4575, -93.0750. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Itasca County, MN 40 km (25 mi) E of here earthquakes near Itasca County
St. Louis County, MN 44 km (27 mi) WSW of here earthquakes near St. Louis County
Aitkin County, MN 99 km (61 mi) NNE of here earthquakes near Aitkin County
Carlton County, MN 100 km (62 mi) NNW of here earthquakes near Carlton County
Koochiching County, MN 102 km (64 mi) SSE of here earthquakes near Koochiching County
Cass County, MN 110 km (69 mi) ENE of here earthquakes near Cass County

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

Aftershocks so far

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

  1. 3.1 3 km N of Mountain Iron, Minnesota
  2. 3.2 10 km N of Mountain Iron, Minnesota
  3. 3.1 12 km N of Parkville, Minnesota
  4. 3.0 3 km NE of Nashwauk, Minnesota
  5. 3.0 0 km NE of Leonidas, Minnesota
  6. 3.1 7 km NNW of Mountain Iron, Minnesota
  7. 2.7 10 km NNW of Mountain Iron, Minnesota
  8. 3.4 7 km N of Parkville, Minnesota
  9. 2.8 Minnesota
  10. 3.0 6 km N of Mountain Iron, Minnesota
  11. 3.1 9 km NNW of Mountain Iron, Minnesota
  12. 3.1 4 km NNW of Mountain Iron, Minnesota
  13. 3.0 5 km NW of Mountain Iron, Minnesota
  14. 3.1 9 km NNW of Kinney, Minnesota
  15. 3.2 3 km N of Leonidas, Minnesota

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

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