mining explosion · reviewed by a seismologist
M 3.0ml
7 km N of Warba, Minnesota
- When
- Magnitude
- M 3.0 (ml)
- Depth
- 0.0 km below the surface
- Felt
- no reports yet
- Nearest
- Itasca County, 41 km NW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1890 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 950 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 350,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
- Magna, Utah 2020 M 5.7 11,000× the energy of this one
- This earthquake M 3.0 about 950 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 47.1966, -93.2823. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Itasca County, MN | 41 km (25 mi) | SE of here | earthquakes near Itasca County |
| Aitkin County, MN | 67 km (42 mi) | N of here | earthquakes near Aitkin County |
| St. Louis County, MN | 72 km (45 mi) | SW of here | earthquakes near St. Louis County |
| Carlton County, MN | 81 km (50 mi) | NW of here | earthquakes near Carlton County |
| Cass County, MN | 84 km (52 mi) | ENE of here | earthquakes near Cass County |
| Crow Wing County, MN | 99 km (61 mi) | NE of here | earthquakes near Crow Wing County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
4 earthquakes have been recorded within 50 km since this one.
- 2.9 7 km S of Buhl, Minnesota
- 3.0 3 km N of Chisholm, Minnesota
- 3.1 5 km NW of Hibbing, Minnesota
- 3.2 3 km NW of Buhl, 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
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.