QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3ml

9 km SSE of Fowlerton, Texas

· 9.3 km deep · released about 85 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N McMullen County 18 kmLa Salle County 33 kmAtascosa County 60 kmLive Oak County 63 kmFrio County 63 kmDuval County 83 kmWebb County 90 kmDimmit County 98 kmJim Wells County 98 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 2.3 (ml)
Depth
9.3 km below the surface
Felt
no reports yet
Nearest
McMullen County, 18 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 249 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 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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 28.3890, -98.7660. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
McMullen County, TX 18 km (11 mi) W of here earthquakes near McMullen County
La Salle County, TX 33 km (20 mi) E of here earthquakes near La Salle County
Atascosa County, TX 60 km (37 mi) SSW of here earthquakes near Atascosa County
Live Oak County, TX 63 km (39 mi) W of here earthquakes near Live Oak County
Frio County, TX 63 km (39 mi) SSE of here earthquakes near Frio County
Duval County, TX 83 km (52 mi) NNW of here earthquakes near Duval County

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

Aftershocks so far

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

  1. 1.7 19 km NW of Three Rivers, Texas
  2. 1.5 15 km NW of Three Rivers, Texas
  3. 1.7 22 km E of Dilley, Texas
  4. 1.7 18 km WNW of Three Rivers, Texas
  5. 1.5 19 km WNW of Three Rivers, Texas
  6. 3.0 23 km E of Dilley, Texas
  7. 1.6 17 km NW of Three Rivers, Texas
  8. 1.5 20 km NW of Three Rivers, Texas
  9. 2.1 20 km WNW of Three Rivers, Texas
  10. 1.6 9 km NW of Tilden, Texas
  11. 1.5 18 km NW of Three Rivers, Texas
  12. 1.9 8 km SE of Fowlerton, Texas
  13. 1.5 16 km NW of Three Rivers, Texas
  14. 2.1 9 km SSE of Fowlerton, Texas
  15. 2.1 8 km SSE of Fowlerton, 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.