QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

19 km WSW of Charlotte, Texas

· 4.1 km deep · released about 120 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Frio County 23 kmAtascosa County 36 kmLa Salle County 53 kmMcMullen County 55 kmMedina County 66 kmBexar County 81 kmZavala County 85 kmWilson County 89 kmLive Oak County 89 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 2.4 (ml)
Depth
4.1 km below the surface
Felt
no reports yet
Nearest
Frio County, 23 km WNW
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 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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 28.7940, -98.8880. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Frio County, TX 23 km (14 mi) ESE of here earthquakes near Frio County
Atascosa County, TX 36 km (22 mi) WSW of here earthquakes near Atascosa County
La Salle County, TX 53 km (33 mi) NNE of here earthquakes near La Salle County
McMullen County, TX 55 km (34 mi) NNW of here earthquakes near McMullen County
Medina County, TX 66 km (41 mi) SSE of here earthquakes near Medina County
Bexar County, TX 81 km (50 mi) SSW of here earthquakes near Bexar County

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

Aftershocks so far

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

  1. 1.6 24 km NNW of Fowlerton, Texas
  2. 2.1 22 km NNW of Fowlerton, Texas
  3. 2.4 24 km NNW of Fowlerton, Texas
  4. 1.8 14 km NNW of Fowlerton, Texas
  5. 1.8 15 km NW of Fowlerton, Texas
  6. 1.9 15 km NW of Fowlerton, Texas
  7. 1.8 7 km N of Hilltop, Texas
  8. 1.8 25 km SW of Charlotte, Texas
  9. 1.9 25 km SW of Charlotte, Texas
  10. 1.5 7 km ENE of Charlotte, Texas
  11. 1.9 10 km W of Charlotte, Texas
  12. 2.3 6 km ESE of Pearsall, Texas
  13. 2.1 11 km SSE of Pearsall, Texas
  14. 1.7 6 km SSE of Fowlerton, Texas
  15. 1.7 7 km ENE of Charlotte, 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.