QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

13 km NE of Tilden, Texas

· 3.0 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N McMullen County 21 kmLive Oak County 37 kmAtascosa County 40 kmLa Salle County 67 kmBee County 70 kmKarnes County 71 kmFrio County 75 kmWilson County 79 kmDuval 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
3.0 km below the surface
Felt
no reports yet
Nearest
McMullen County, 21 km SW
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 28.5380, -98.4450. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
McMullen County, TX 21 km (13 mi) NE of here earthquakes near McMullen County
Live Oak County, TX 37 km (23 mi) NW of here earthquakes near Live Oak County
Atascosa County, TX 40 km (25 mi) SSE of here earthquakes near Atascosa County
La Salle County, TX 67 km (42 mi) ENE of here earthquakes near La Salle County
Bee County, TX 70 km (43 mi) WNW of here earthquakes near Bee County
Karnes County, TX 71 km (44 mi) SW of here earthquakes near Karnes County

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

Aftershocks so far

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

  1. 1.5 7 km ENE of Charlotte, Texas
  2. 2.4 10 km N of Three Rivers, Texas
  3. 1.7 6 km SSE of Fowlerton, Texas
  4. 2.5 13 km NNE of Three Rivers, Texas
  5. 2.7 7 km N of Three Rivers, Texas
  6. 1.8 18 km NW of Three Rivers, Texas
  7. 1.9 20 km SW of Falls City, Texas
  8. 1.7 20 km SW of Falls City, Texas
  9. 2.6 20 km SW of Falls City, 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.