QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

Earthquake near Varnell, GA

No earthquake was likely felt in Varnell in the 24 hours to 5:01 pm EST (22:01 UTC). The last one was M 2.1, 3 km (2 mi) SW, at 3:35 pm EDT on 16 March 2026, estimated intensity II (weak) in town. Every earthquake near Varnell

This page: a magnitude 1.6 earthquake was recorded 6 km (4 mi) west-northwest of Varnell, GA, at 3:11 am EST on 18 January 2020 (08:11 UTC), 19 km deep.

USGS: 5 km WNW of Varnell, Georgia

25 km (16 mi) SE of Chattanooga, TN

3:11 am EST, Jan 18, 2020 · · 19 km deep · released about 7.6 lb of TNT

10 km30 km60 km120 km N Catoosa County 11 kmWhitfield County 15 kmBradley County 29 kmMurray County 30 kmHamilton County 31 kmWalker County 33 kmDade County 45 kmPolk County 49 kmGordon County 49 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
3:11 am EST on 18 January 2020 ()
Where
6 km (4 mi) west-northwest of Varnell, GA · earthquakes near Varnell
Magnitude
M 1.6 (md)
Depth
19 km below the surface
Felt
no reports yet
Nearest
Catoosa County, 11 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2448 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Varnell, 6 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: Ringgold, Apison, East Brainerd, Collegedale, Dalton, Fort Oglethorpe.

How big was it?

This earthquake released about 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

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 34.9295, -85.0265. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Catoosa County, GA 11 km (7 mi) WSW earthquakes near Catoosa County
Whitfield County, GA 15 km (9 mi) SSE earthquakes near Whitfield County
Bradley County, TN 29 km (18 mi) NNE earthquakes near Bradley County
Murray County, GA 30 km (19 mi) ESE earthquakes near Murray County
Hamilton County, TN 31 km (19 mi) NNW earthquakes near Hamilton County
Walker County, GA 33 km (21 mi) SW earthquakes near Walker County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

42 earthquakes have been recorded within 50 km since this one.

  1. 2.4 9 km WNW of Hopewell, Tennessee
  2. 1.9 6 km NW of Eton, Georgia
  3. 2.3 8 km W of Tunnel Hill, Georgia
  4. 1.7 8 km ENE of Wildwood Lake, Tennessee
  5. 2.2 7 km ENE of East Cleveland, Tennessee
  6. 2.0 2 km SSE of Varnell, Georgia
  7. 2.0 8 km N of Trion, Georgia
  8. 1.5 13 km SW of Dalton, Georgia
  9. 2.0 13 km SW of Dalton, Georgia
  10. 2.3 13 km SW of Dalton, Georgia
  11. 2.2 13 km SW of Dalton, Georgia
  12. 2.2 2 km NW of Eton, Georgia
  13. 2.2 4 km SSE of Lakesite, Tennessee
  14. 1.9 7 km E of Benton, Tennessee
  15. 2.3 4 km ESE of East Cleveland, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.