QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

11 km W of Tilden, Texas

· 6.6 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N McMullen County 14 kmLa Salle County 45 kmAtascosa County 47 kmLive Oak County 54 kmFrio County 61 kmBee County 90 kmDuval County 91 kmKarnes County 92 kmWilson County 95 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
6.6 km below the surface
Felt
no reports yet
Nearest
McMullen County, 14 km SE
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 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 28.4820, -98.6640. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
McMullen County, TX 14 km (8 mi) NW of here earthquakes near McMullen County
La Salle County, TX 45 km (28 mi) ENE of here earthquakes near La Salle County
Atascosa County, TX 47 km (29 mi) SSW of here earthquakes near Atascosa County
Live Oak County, TX 54 km (34 mi) WNW of here earthquakes near Live Oak County
Frio County, TX 61 km (38 mi) SE of here earthquakes near Frio County
Bee County, TX 90 km (56 mi) W of here earthquakes near Bee County

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

Aftershocks so far

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

  1. 1.7 6 km SSE of Fowlerton, Texas
  2. 2.7 7 km N of Three Rivers, Texas
  3. 1.8 18 km NW of Three Rivers, Texas
  4. 1.8 13 km NE of Tilden, Texas
  5. 2.7 8 km N of Three Rivers, Texas
  6. 1.7 7 km ENE of Charlotte, Texas
  7. 2.4 12 km E of Tilden, Texas
  8. 1.8 12 km E of Tilden, Texas
  9. 1.7 12 km E of Tilden, Texas
  10. 1.9 12 km E of Tilden, Texas
  11. 1.6 22 km W of Pawnee, Texas
  12. 1.7 22 km W of Pawnee, Texas
  13. 1.9 20 km SW of Charlotte, Texas
  14. 2.0 13 km SSW of Fowlerton, Texas
  15. 1.6 8 km NNE of Three Rivers, 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.