Earthquake · reviewed by a seismologist
M 2.2md
8 km WNW of Roan Mountain, Tennessee
- When
- Magnitude
- M 2.2 (md)
- Depth
- 8.2 km below the surface
- Felt
- 4 reports · strongest reported intensity IV
- Nearest
- Carter County, 6 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1005 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 4 people have reported feeling it to USGS.
How big was it?
This earthquake released about 69 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 220,000× the energy of this one
- Magna, Utah 2020 M 5.7 150,000× the energy of this one
- Around the size people start to feel M 3.0 14× the energy of this one
- This earthquake M 2.2 about 69 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 36.2352, -82.1497. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Carter County, TN | 6 km (4 mi) | SSW of here | earthquakes near Carter County |
| Mitchell County, NC | 25 km (15 mi) | N of here | earthquakes near Mitchell County |
| Avery County, NC | 27 km (17 mi) | NW of here | earthquakes near Avery County |
| Unicoi County, TN | 28 km (18 mi) | ENE of here | earthquakes near Unicoi County |
| Washington County, TN | 32 km (20 mi) | ESE of here | earthquakes near Washington County |
| Sullivan County, TN | 33 km (21 mi) | SSE of here | earthquakes near Sullivan County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
3 earthquakes have been recorded within 50 km since this one.
- 1.7 6 km WSW of Newland, North Carolina
- 1.8 8 km W of Bakersville, North Carolina
- 1.9 1 km SW of Fall Branch, Tennessee
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.