QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

7 km ENE of Charlotte, Texas

· 3.4 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Atascosa County 10 kmFrio County 46 kmMcMullen County 56 kmWilson County 63 kmBexar County 64 kmMedina County 70 kmLa Salle County 74 kmKarnes County 76 kmLive Oak County 77 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 1.5 (ml)
Depth
3.4 km below the surface
Felt
no reports yet
Nearest
Atascosa County, 10 km E
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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 28.8830, -98.6370. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Atascosa County, TX 10 km (6 mi) W of here earthquakes near Atascosa County
Frio County, TX 46 km (29 mi) E of here earthquakes near Frio County
McMullen County, TX 56 km (35 mi) N of here earthquakes near McMullen County
Wilson County, TX 63 km (39 mi) WSW of here earthquakes near Wilson County
Bexar County, TX 64 km (40 mi) S of here earthquakes near Bexar County
Medina County, TX 70 km (43 mi) SE of here earthquakes near Medina County

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

Aftershocks so far

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

  1. 1.7 11 km WNW of Tilden, Texas
  2. 1.9 11 km WNW of Tilden, Texas
  3. 1.7 10 km WNW of Tilden, Texas
  4. 2.7 11 km WNW of Tilden, Texas
  5. 1.8 11 km WNW of Tilden, Texas
  6. 1.7 10 km NW of Tilden, Texas
  7. 1.6 18 km SW of Floresville, Texas
  8. 1.8 18 km SW of Floresville, Texas
  9. 2.2 12 km WNW of Tilden, Texas
  10. 1.9 15 km NW of Fowlerton, Texas
  11. 1.7 22 km NE of Tilden, Texas
  12. 1.8 22 km NE of Tilden, Texas
  13. 1.7 22 km NE of Tilden, Texas
  14. 1.6 23 km NW of Three Rivers, Texas
  15. 1.7 23 km SSE of Christine, 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.