QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

5 km W of Jourdanton, Texas

· 4.1 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Atascosa County 7 kmFrio County 50 kmWilson County 58 kmMcMullen County 59 kmBexar County 60 kmMedina County 70 kmKarnes County 73 kmLive Oak County 78 kmLa Salle County 79 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
4.1 km below the surface
Felt
no reports yet
Nearest
Atascosa County, 7 km ESE
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 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 28.9140, -98.6010. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Atascosa County, TX 7 km (4 mi) WNW of here earthquakes near Atascosa County
Frio County, TX 50 km (31 mi) E of here earthquakes near Frio County
Wilson County, TX 58 km (36 mi) WSW of here earthquakes near Wilson County
McMullen County, TX 59 km (37 mi) N of here earthquakes near McMullen County
Bexar County, TX 60 km (37 mi) S of here earthquakes near Bexar County
Medina County, TX 70 km (43 mi) SE of here earthquakes near Medina County

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

Aftershocks so far

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

  1. 1.8 19 km NW of Three Rivers, Texas
  2. 1.8 5 km ENE of Christine, Texas
  3. 1.6 15 km WSW of Falls City, Texas
  4. 2.4 6 km ENE of Christine, Texas
  5. 1.8 5 km E of Christine, Texas
  6. 2.1 16 km WSW of Falls City, Texas
  7. 1.6 15 km WSW of Falls City, Texas
  8. 1.6 16 km E of Pleasanton, Texas
  9. 1.6 7 km ENE of Christine, Texas
  10. 1.5 6 km ENE of Christine, Texas
  11. 2.2 6 km ENE of Christine, Texas
  12. 1.5 6 km ENE of Christine, Texas
  13. 2.2 18 km W of Pawnee, Texas
  14. 2.0 19 km W of Pawnee, Texas
  15. 1.8 19 km W of Pawnee, 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.