QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

11 km SE of Fowlerton, Texas

· 7.4 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N McMullen County 15 kmLa Salle County 35 kmAtascosa County 60 kmLive Oak County 60 kmFrio County 65 kmDuval County 82 kmWebb County 91 kmJim Wells County 96 kmBee County 97 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 2.1 (ml)
Depth
7.4 km below the surface
Felt
no reports yet
Nearest
McMullen County, 15 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 28.3860, -98.7370. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
McMullen County, TX 15 km (10 mi) W of here earthquakes near McMullen County
La Salle County, TX 35 km (22 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 60 km (37 mi) W of here earthquakes near Live Oak County
Frio County, TX 65 km (40 mi) SE of here earthquakes near Frio County
Duval County, TX 82 km (51 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

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

  1. 1.7 18 km WNW of Three Rivers, Texas
  2. 1.5 19 km WNW of Three Rivers, Texas
  3. 3.0 23 km E of Dilley, Texas
  4. 1.6 17 km NW of Three Rivers, Texas
  5. 1.5 20 km NW of Three Rivers, Texas
  6. 2.1 20 km WNW of Three Rivers, Texas
  7. 1.6 9 km NW of Tilden, Texas
  8. 1.5 18 km NW of Three Rivers, Texas
  9. 1.9 8 km SE of Fowlerton, Texas
  10. 1.5 16 km NW of Three Rivers, Texas
  11. 2.1 9 km SSE of Fowlerton, Texas
  12. 2.1 8 km SSE of Fowlerton, Texas
  13. 1.8 7 km SE of Fowlerton, Texas
  14. 1.9 southern Texas
  15. 1.9 8 km ESE 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.