QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

22 km E of Dilley, Texas

· 6.8 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Frio County 27 kmLa Salle County 39 kmAtascosa County 46 kmMcMullen County 48 kmMedina County 77 kmZavala County 83 kmDimmit County 86 kmLive Oak County 87 kmBexar 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 3.1 (ml)
Depth
6.8 km below the surface
Felt
no reports yet
Nearest
Frio County, 27 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 17 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× more

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 28.6780, -98.9390. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Frio County, TX 27 km (17 mi) SE of here earthquakes near Frio County
La Salle County, TX 39 km (25 mi) NNE of here earthquakes near La Salle County
Atascosa County, TX 46 km (29 mi) WSW of here earthquakes near Atascosa County
McMullen County, TX 48 km (30 mi) NW of here earthquakes near McMullen County
Medina County, TX 77 km (48 mi) SSE of here earthquakes near Medina County
Zavala County, TX 83 km (51 mi) ESE of here earthquakes near Zavala County

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

Aftershocks so far

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

  1. 2.8 17 km W of Charlotte, Texas
  2. 2.6 14 km ESE of Pearsall, Texas
  3. 2.7 16 km ESE of Pearsall, Texas
  4. 1.6 5 km S of Pearsall, Texas
  5. 1.6 18 km ESE of Pearsall, Texas
  6. 1.9 11 km ESE of Pearsall, Texas
  7. 1.9 17 km ESE of Pearsall, Texas
  8. 2.2 17 km ESE of Pearsall, Texas
  9. 1.7 12 km E of Pearsall, Texas
  10. 1.4 16 km E of Pearsall, Texas
  11. 1.9 12 km ESE of Pearsall, Texas
  12. 2.3 10 km SSE of Pearsall, Texas
  13. 2.2 11 km ESE of Pearsall, Texas
  14. 1.9 11 km ESE of Pearsall, Texas
  15. 2.5 17 km ESE of Pearsall, 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

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