QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1mb_lg

18 km N of Yorktown, Texas

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

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N DeWitt County 13 kmGonzales County 35 kmKarnes County 45 kmGoliad County 54 kmLavaca County 59 kmWilson County 60 kmVictoria County 62 kmGuadalupe County 67 kmCaldwell County 78 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 (mb_lg)
Depth
5.0 km below the surface
Felt
7 reports · strongest reported intensity IV
Nearest
DeWitt County, 13 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 452 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 7 people have reported feeling it to USGS.

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 29.1439, -97.4706. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
DeWitt County, TX 13 km (8 mi) WNW of here earthquakes near DeWitt County
Gonzales County, TX 35 km (22 mi) S of here earthquakes near Gonzales County
Karnes County, TX 45 km (28 mi) NE of here earthquakes near Karnes County
Goliad County, TX 54 km (33 mi) N of here earthquakes near Goliad County
Lavaca County, TX 59 km (37 mi) WSW of here earthquakes near Lavaca County
Wilson County, TX 60 km (37 mi) E of here earthquakes near Wilson County

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

Aftershocks so far

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

  1. 1.5 17 km ENE of Falls City, Texas
  2. 3.1 21 km ENE of Falls City, Texas
  3. 2.0 12 km ENE of Falls City, Texas
  4. 1.9 9 km ENE of Falls City, Texas
  5. 2.0 12 km ENE of Falls City, Texas
  6. 1.8 19 km ENE of Falls City, Texas
  7. 2.6 19 km ENE of Falls City, Texas
  8. 1.6 15 km W of Shiner, Texas
  9. 2.0 6 km ENE of Falls City, Texas
  10. 2.9 9 km E of Falls City, Texas
  11. 1.7 18 km SSW of Nixon, Texas
  12. 2.0 18 km ENE of Falls City, Texas
  13. 2.3 7 km E of Falls City, Texas
  14. 1.7 6 km ENE of Falls City, Texas
  15. 2.5 18 km ENE 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.