QuakeIndex

mining explosion · reviewed by a seismologist

M 2.7mb_lg

4 km NNW of Nashwauk, Minnesota

· 0.0 km deep · released about 340 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Itasca County 33 kmSt. Louis County 53 kmAitkin County 93 kmCarlton County 98 kmCass County 101 kmKoochiching County 102 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 2.7 (mb_lg)
Depth
0.0 km below the surface
Felt
no reports yet
Nearest
Itasca County, 33 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2213 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 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 47.4183, -93.1798. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Itasca County, MN 33 km (21 mi) ESE of here earthquakes near Itasca County
St. Louis County, MN 53 km (33 mi) WSW of here earthquakes near St. Louis County
Aitkin County, MN 93 km (57 mi) N of here earthquakes near Aitkin County
Carlton County, MN 98 km (61 mi) NNW of here earthquakes near Carlton County
Cass County, MN 101 km (63 mi) ENE of here earthquakes near Cass County
Koochiching County, MN 102 km (64 mi) SSE of here earthquakes near Koochiching County

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

Aftershocks so far

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

  1. 2.6 6 km NW of Mountain Iron, Minnesota
  2. 2.7 2 km NNE of Kinney, Minnesota
  3. 2.9 7 km S of Buhl, Minnesota
  4. 2.9 6 km NNE of Kinney, Minnesota
  5. 2.7 4 km NNW of Buhl, Minnesota
  6. 2.6 4 km NNW of Mountain Iron, Minnesota
  7. 3.0 3 km N of Kinney, Minnesota
  8. 2.9 Minnesota
  9. 2.9 9 km N of Kinney, Minnesota
  10. 3.0 7 km N of Kinney, Minnesota
  11. 3.0 2 km NNW of Mountain Iron, Minnesota
  12. 3.0 4 km NE of Kinney, Minnesota
  13. 3.0 3 km W of Mountain Iron, Minnesota
  14. 3.0 6 km NNE of Kinney, Minnesota
  15. 3.0 3 km N of Chisholm, 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

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