Earthquake · reviewed by a seismologist
M 2.2md
Earthquake near Graysville, TN
No earthquake was likely felt in Graysville in the 24 hours to 3:42 pm EST (20:42 UTC). The last one was M 2.5, 42 km (26 mi) WNW, at 8:54 am EST on 2 November 2026, estimated intensity II (weak) in town; 3 felt reports to USGS. Every earthquake near Graysville
This page: a magnitude 2.2 earthquake was recorded 9 km (6 mi) north-northwest of Graysville, TN, at 7:56 am EDT on 20 July 2024 (11:56 UTC), 13 km deep.
USGS: 9 km NNW of Graysville, Tennessee
52 km (32 mi) NNE of Chattanooga, TN · 45 km (28 mi) NNW of Cleveland, TN
- When
- 7:56 am EDT on 20 July 2024 ()
- Where
- 9 km (6 mi) north-northwest of Graysville, TN · earthquakes near Graysville
- Magnitude
- M 2.2 (md)
- Depth
- 13 km below the surface
- Felt
- no reports yet
- Nearest
- Bledsoe County, 10 km NW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 844 days ago
Earthquake alerts for Graysville, TN
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 29 km (18 mi) from the epicentre. In Graysville, 9 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Pikeville, Dayton, Sale Creek, Mowbray Mountain, Dunlap.
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.
For this area
The largest earthquake within 50 km since 2016 was M 4.4 on 2018-12-12 — about 2,100 times the energy of this one.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 35.5203, -85.1360. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Bledsoe County, TN | 10 km (6 mi) | NW | earthquakes near Bledsoe County |
| Rhea County, TN | 19 km (12 mi) | ENE | earthquakes near Rhea County |
| Meigs County, TN | 29 km (18 mi) | E | earthquakes near Meigs County |
| Sequatchie County, TN | 30 km (19 mi) | WSW | earthquakes near Sequatchie County |
| Van Buren County, TN | 35 km (22 mi) | NW | earthquakes near Van Buren County |
| Hamilton County, TN | 40 km (25 mi) | S | earthquakes near Hamilton County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
15 earthquakes have been recorded within 50 km since this one.
- 2.5 13 km NE of Beersheba Springs, Tennessee
- 1.9 4 km ENE of Riceville, Tennessee
- 2.1 7 km SSW of Dunlap, Tennessee
- 1.8 11 km NNE of Decatur, Tennessee
- 2.4 10 km NNE of Decatur, Tennessee
- 2.0 6 km WSW of Riceville, Tennessee
- 1.9 5 km SSW of Riceville, Tennessee
- 2.2 2 km W of Dayton, Tennessee
- 2.1 4 km NNW of Dayton, Tennessee
- 1.8 6 km SW of Decatur, Tennessee
- 2.3 7 km SSE of Charleston, Tennessee
- 2.2 10 km SSE of Dayton, Tennessee
- 2.3 3 km S of Lone Oak, Tennessee
- 2.1 6 km NNE of Hopewell, Tennessee
- 1.6 9 km SW of Spring City, 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.