Earthquake · reviewed by a seismologist
M 2.1md
7 km NNE of Iron City, Tennessee
- When
- Magnitude
- M 2.1 (md)
- Depth
- 2.0 km below the surface
- Felt
- 2 reports · strongest reported intensity II
- Nearest
- Lawrence County, 21 km NE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2588 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.
How big was it?
This earthquake released about 51 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 300,000× the energy of this one
- Magna, Utah 2020 M 5.7 210,000× the energy of this one
- Around the size people start to feel M 3.0 19× the energy of this one
- This earthquake M 2.1 about 51 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 35.0885, -87.5585. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Lawrence County, TN | 21 km (13 mi) | SW of here | earthquakes near Lawrence County |
| Lauderdale County, AL | 22 km (14 mi) | NNE of here | earthquakes near Lauderdale County |
| Wayne County, TN | 29 km (18 mi) | SE of here | earthquakes near Wayne County |
| Colbert County, AL | 48 km (30 mi) | NNE of here | earthquakes near Colbert County |
| Lewis County, TN | 49 km (30 mi) | S of here | earthquakes near Lewis County |
| Giles County, TN | 49 km (31 mi) | WSW of here | earthquakes near Giles County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
5 earthquakes have been recorded within 50 km since this one.
- 2.4 11 km W of Elkton, Tennessee
- 2.0 19 km W of Collinwood, Tennessee
- 2.3 8 km S of Killen, Alabama
- 1.7 5 km NNE of Underwood-Petersville, Alabama
- 2.3 6 km W of Lexington, Alabama
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.