QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

4 km SE of Round Mountain, Texas

· 3.1 km deep · released about 120 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Blanco County 17 kmBurnet County 44 kmHays County 47 kmLlano County 49 kmGillespie County 61 kmTravis County 63 kmKendall County 64 kmComal County 66 kmWilliamson County 73 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 2.4 (ml)
Depth
3.1 km below the surface
Felt
no reports yet
Nearest
Blanco County, 17 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 958 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 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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 30.4050, -98.3150. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Blanco County, TX 17 km (11 mi) NNE of here earthquakes near Blanco County
Burnet County, TX 44 km (27 mi) SSW of here earthquakes near Burnet County
Hays County, TX 47 km (29 mi) NW of here earthquakes near Hays County
Llano County, TX 49 km (30 mi) SE of here earthquakes near Llano County
Gillespie County, TX 61 km (38 mi) E of here earthquakes near Gillespie County
Travis County, TX 63 km (39 mi) WNW of here earthquakes near Travis County

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

Aftershocks so far

1 earthquake has been recorded within 50 km since this one.

  1. 2.0 4 km SSE of Burnet, 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.