QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

7 km WNW of Yorktown, Texas

· 6.5 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N DeWitt County 22 kmKarnes County 29 kmGoliad County 41 kmGonzales County 52 kmWilson County 53 kmVictoria County 63 kmBee County 67 kmGuadalupe County 74 kmLavaca County 76 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 1.5 (ml)
Depth
6.5 km below the surface
Felt
no reports yet
Nearest
DeWitt County, 22 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 314 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 29.0040, -97.5720. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
DeWitt County, TX 22 km (14 mi) WSW of here earthquakes near DeWitt County
Karnes County, TX 29 km (18 mi) ENE of here earthquakes near Karnes County
Goliad County, TX 41 km (25 mi) NNW of here earthquakes near Goliad County
Gonzales County, TX 52 km (32 mi) S of here earthquakes near Gonzales County
Wilson County, TX 53 km (33 mi) ESE of here earthquakes near Wilson County
Victoria County, TX 63 km (39 mi) WNW of here earthquakes near Victoria County

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

Aftershocks so far

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

  1. 2.4 15 km E of Smiley, Texas
  2. 2.4 16 km ESE of Smiley, Texas
  3. 1.5 15 km ESE of Smiley, Texas
  4. 1.8 16 km E of Smiley, Texas
  5. 1.7 15 km ESE of Smiley, Texas
  6. 1.5 6 km NW of Nordheim, Texas
  7. 1.5 14 km ESE of Smiley, Texas
  8. 2.3 16 km E of Smiley, Texas
  9. 2.6 16 km E of Smiley, Texas
  10. 1.8 17 km ENE of Falls City, Texas
  11. 2.1 11 km E of Smiley, Texas
  12. 2.9 11 km E of Smiley, Texas
  13. 1.9 12 km E of Smiley, Texas
  14. 1.9 2 km ESE of Falls City, Texas
  15. 1.7 2 km SE 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.0 on 2018-05-01 — it released about 5,600 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.