QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

15 km E of Smiley, Texas

· 7.1 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N DeWitt County 22 kmGonzales County 24 kmKarnes County 52 kmLavaca County 56 kmGuadalupe County 59 kmWilson County 60 kmGoliad County 65 kmCaldwell County 67 kmVictoria County 70 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
7.1 km below the surface
Felt
no reports yet
Nearest
DeWitt County, 22 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 367 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 29.2470, -97.4790. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
DeWitt County, TX 22 km (13 mi) NNW of here earthquakes near DeWitt County
Gonzales County, TX 24 km (15 mi) S of here earthquakes near Gonzales County
Karnes County, TX 52 km (32 mi) NE of here earthquakes near Karnes County
Lavaca County, TX 56 km (35 mi) WSW of here earthquakes near Lavaca County
Guadalupe County, TX 59 km (37 mi) SE of here earthquakes near Guadalupe County
Wilson County, TX 60 km (37 mi) E of here earthquakes near Wilson 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. 1.8 17 km ENE of Smiley, Texas
  2. 2.0 18 km ENE of Smiley, Texas
  3. 2.1 17 km S of Nixon, Texas
  4. 2.4 16 km S of Nixon, Texas
  5. 2.6 17 km S of Nixon, Texas
  6. 2.7 17 km S of Nixon, Texas
  7. 2.2 17 km S of Nixon, Texas
  8. 2.0 17 km S of Nixon, Texas
  9. 1.8 18 km S of Nixon, Texas
  10. 1.7 19 km S of Nixon, Texas
  11. 2.4 17 km S of Nixon, Texas
  12. 1.7 18 km S of Nixon, Texas
  13. 1.7 17 km S of Nixon, Texas
  14. 1.6 17 km S of Nixon, Texas
  15. 1.8 18 km S of Nixon, 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.