Earthquake · reviewed by a seismologist
M 2.2md
8 km ENE of Mountain City, Tennessee
- When
- Magnitude
- M 2.2 (md)
- Depth
- 4.2 km below the surface
- Felt
- 15 reports · strongest reported intensity IV
- Nearest
- Johnson County, 14 km WSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1626 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 15 people have reported feeling it to USGS.
How big was it?
This earthquake released about 56 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 5.8 270,000× the energy of this one
- Magna, Utah 2020 M 5.7 190,000× the energy of this one
- Around the size people start to feel M 3.0 17× the energy of this one
- This earthquake M 2.2 about 56 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 36.5045, -81.7227. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Johnson County, TN | 14 km (8 mi) | ENE of here | earthquakes near Johnson County |
| Ashe County, NC | 21 km (13 mi) | WNW of here | earthquakes near Ashe County |
| Watauga County, NC | 30 km (19 mi) | N of here | earthquakes near Watauga County |
| Washington County, VA | 34 km (21 mi) | SE of here | earthquakes near Washington County |
| Bristol city, VA | 41 km (25 mi) | ESE of here | earthquakes near Bristol city |
| Smyth County, VA | 41 km (25 mi) | SSW of here | earthquakes near Smyth 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.
- 2.2 16 km E of Jefferson, North Carolina
- 2.2 8 km WNW of Roan Mountain, Tennessee
- 1.8 9 km SSE of West Jefferson, North Carolina
- 2.1 5 km NNE of Blowing Rock, North Carolina
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.