QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

15 km E of Smiley, Texas

· 4.4 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gonzales County 20 kmDeWitt County 25 kmKarnes County 55 kmLavaca County 55 kmGuadalupe County 57 kmWilson County 60 kmCaldwell County 63 kmGoliad County 69 kmVictoria County 73 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
4.4 km below the surface
Felt
no reports yet
Nearest
Gonzales County, 20 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 319 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 29.2780, -97.4790. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gonzales County, TX 20 km (13 mi) S of here earthquakes near Gonzales County
DeWitt County, TX 25 km (15 mi) NNW of here earthquakes near DeWitt County
Karnes County, TX 55 km (34 mi) NE of here earthquakes near Karnes County
Lavaca County, TX 55 km (34 mi) WSW of here earthquakes near Lavaca County
Guadalupe County, TX 57 km (35 mi) SE of here earthquakes near Guadalupe County
Wilson County, TX 60 km (37 mi) ENE of here earthquakes near Wilson County

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

Aftershocks so far

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

  1. 1.9 12 km E of Smiley, Texas
  2. 1.8 8 km N of Nordheim, Texas
  3. 1.8 8 km WNW of Yorktown, Texas
  4. 2.8 12 km WNW of Yorktown, Texas
  5. 2.6 8 km WNW of Yorktown, Texas
  6. 2.6 8 km WNW of Yorktown, Texas
  7. 1.5 6 km NNW of Nordheim, Texas
  8. 1.6 8 km N of Nordheim, Texas
  9. 2.1 8 km WNW of Yorktown, Texas
  10. 2.0 7 km NNW of Nordheim, Texas
  11. 1.5 9 km WNW of Yorktown, Texas
  12. 2.2 8 km WNW of Yorktown, Texas
  13. 2.3 8 km N of Nordheim, Texas
  14. 1.5 7 km NNW of Nordheim, Texas
  15. 1.5 7 km NNW of Nordheim, 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.