QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9mb_lg

5 km W of Flatonia, Texas

· 3.1 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fayette County 32 kmGonzales County 40 kmLavaca County 40 kmCaldwell County 48 kmBastrop County 49 kmColorado County 64 kmDeWitt County 69 kmLee County 74 kmGuadalupe County 77 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
Magnitude
M 2.9 (mb_lg)
Depth
3.1 km below the surface
Felt
8 reports · strongest reported intensity II
Nearest
Fayette County, 32 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 452 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 8 people have reported feeling it to USGS.

How big was it?

This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 29.6797, -97.1635. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fayette County, TX 32 km (20 mi) SW of here earthquakes near Fayette County
Gonzales County, TX 40 km (25 mi) NE of here earthquakes near Gonzales County
Lavaca County, TX 40 km (25 mi) NW of here earthquakes near Lavaca County
Caldwell County, TX 48 km (30 mi) ESE of here earthquakes near Caldwell County
Bastrop County, TX 49 km (30 mi) SSE of here earthquakes near Bastrop County
Colorado County, TX 64 km (40 mi) W of here earthquakes near Colorado County

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

Aftershocks so far

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

  1. 2.2 15 km SSE of Gonzales, Texas
  2. 1.9 17 km SSE of Gonzales, Texas
  3. 2.6 17 km SSE of Gonzales, Texas
  4. 2.5 17 km SSE of Gonzales, Texas
  5. 1.9 18 km SSE of Gonzales, Texas
  6. 1.9 17 km SSE of Gonzales, Texas
  7. 2.5 17 km SSE of Gonzales, Texas
  8. 2.2 18 km SSE of Gonzales, Texas
  9. 1.9 10 km W of Shiner, Texas
  10. 2.3 11 km W of Shiner, Texas
  11. 1.7 10 km W of Shiner, Texas
  12. 1.7 10 km W of Shiner, Texas
  13. 2.0 10 km W of Shiner, Texas
  14. 2.6 3 km NNW of Hallettsville, Texas
  15. 1.9 17 km ENE of Smiley, Texas

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.