QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

8 km ESE of Smiley, Texas

· 8.3 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gonzales County 25 kmDeWitt County 26 kmKarnes County 47 kmWilson County 52 kmGuadalupe County 54 kmLavaca County 63 kmGoliad County 66 kmCaldwell County 66 kmVictoria County 75 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
8.3 km below the surface
Felt
no reports yet
Nearest
Gonzales County, 25 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 452 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 29.2420, -97.5530. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Gonzales County, TX 25 km (16 mi) SSW of here earthquakes near Gonzales County
DeWitt County, TX 26 km (16 mi) NW of here earthquakes near DeWitt County
Karnes County, TX 47 km (29 mi) NE of here earthquakes near Karnes County
Wilson County, TX 52 km (33 mi) E of here earthquakes near Wilson County
Guadalupe County, TX 54 km (33 mi) SE of here earthquakes near Guadalupe County
Lavaca County, TX 63 km (39 mi) WSW of here earthquakes near Lavaca County

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

Aftershocks so far

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

  1. 1.6 16 km S of Smiley, Texas
  2. 1.7 12 km SSE of Smiley, Texas
  3. 1.6 11 km SSE of Smiley, Texas
  4. 2.1 9 km WNW of Yorktown, Texas
  5. 1.5 16 km S of Nixon, Texas
  6. 2.4 11 km SSE of Smiley, Texas
  7. 2.0 13 km ENE of Falls City, Texas
  8. 1.6 12 km ENE of Falls City, Texas
  9. 1.5 11 km ENE of Falls City, Texas
  10. 1.8 12 km ENE of Falls City, Texas
  11. 1.8 12 km ENE of Falls City, Texas
  12. 2.0 12 km ENE of Falls City, Texas
  13. 2.9 11 km ENE of Falls City, Texas
  14. 2.5 12 km ENE of Falls City, Texas
  15. 2.0 11 km ENE of Falls City, 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.