QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

9 km WNW of Yoakum, Texas

· 6.1 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gonzales County 29 kmLavaca County 30 kmDeWitt County 31 kmVictoria County 65 kmCaldwell County 67 kmFayette County 68 kmGuadalupe County 75 kmJackson County 75 kmColorado County 76 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 1.8 (ml)
Depth
6.1 km below the surface
Felt
no reports yet
Nearest
Gonzales County, 29 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 453 days ago

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

How big was it?

This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 29.3330, -97.2330. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gonzales County, TX 29 km (18 mi) ESE of here earthquakes near Gonzales County
Lavaca County, TX 30 km (19 mi) W of here earthquakes near Lavaca County
DeWitt County, TX 31 km (19 mi) NNE of here earthquakes near DeWitt County
Victoria County, TX 65 km (40 mi) NNW of here earthquakes near Victoria County
Caldwell County, TX 67 km (42 mi) SE of here earthquakes near Caldwell County
Fayette County, TX 68 km (42 mi) SSW of here earthquakes near Fayette County

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

Aftershocks so far

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

  1. 2.1 12 km ESE of Smiley, Texas
  2. 2.5 10 km SE of Smiley, Texas
  3. 2.5 12 km ESE of Smiley, Texas
  4. 3.1 1 km SSE of Smiley, Texas
  5. 3.1 18 km N of Yorktown, Texas
  6. 1.6 15 km S of Smiley, Texas
  7. 1.8 14 km ESE of Smiley, Texas
  8. 1.8 13 km ESE of Smiley, Texas
  9. 1.9 13 km ESE of Smiley, Texas
  10. 1.8 12 km ESE of Smiley, Texas
  11. 2.5 14 km ESE of Smiley, Texas
  12. 1.8 13 km ESE of Smiley, Texas
  13. 2.5 14 km ESE of Smiley, Texas
  14. 2.1 13 km ESE of Smiley, Texas
  15. 1.5 13 km ESE 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.