QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

16 km NNW of Fowlerton, Texas

· 5.3 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N La Salle County 33 kmFrio County 37 kmMcMullen County 39 kmAtascosa County 49 kmLive Oak County 80 kmDimmit County 86 kmMedina County 88 kmZavala County 89 kmWebb County 102 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
5.3 km below the surface
Felt
no reports yet
Nearest
La Salle County, 33 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 332 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 28.5880, -98.9010. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
La Salle County, TX 33 km (20 mi) NE of here earthquakes near La Salle County
Frio County, TX 37 km (23 mi) SSE of here earthquakes near Frio County
McMullen County, TX 39 km (24 mi) NW of here earthquakes near McMullen County
Atascosa County, TX 49 km (31 mi) SW of here earthquakes near Atascosa County
Live Oak County, TX 80 km (50 mi) WNW of here earthquakes near Live Oak County
Dimmit County, TX 86 km (54 mi) ENE of here earthquakes near Dimmit County

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

Aftershocks so far

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

  1. 2.1 4 km N of Hilltop, Texas
  2. 1.9 9 km WSW of Hilltop, Texas
  3. 2.0 6 km SW of Dilley, Texas
  4. 1.9 21 km SW of Charlotte, Texas
  5. 2.0 19 km SSW of Charlotte, Texas
  6. 2.0 21 km SSW of Charlotte, Texas
  7. 2.2 10 km SSE of Fowlerton, Texas
  8. 2.0 17 km SSW of Charlotte, Texas
  9. 2.0 16 km E of Dilley, Texas
  10. 1.7 14 km ENE of Hilltop, Texas
  11. 1.8 14 km SSE of Pearsall, Texas
  12. 1.8 6 km NE of North Pearsall, Texas
  13. 2.1 6 km SW of West Pearsall, Texas
  14. 1.5 18 km NE of Tilden, Texas
  15. 2.0 17 km NE of Tilden, 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.