QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

12 km WNW of Yorktown, Texas

· 6.5 km deep · released about 480 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N DeWitt County 24 kmKarnes County 28 kmGoliad County 46 kmGonzales County 48 kmWilson County 49 kmVictoria County 68 kmGuadalupe County 69 kmBee County 71 kmLavaca County 77 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 2.8 (ml)
Depth
6.5 km below the surface
Felt
no reports yet
Nearest
DeWitt County, 24 km E
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.

How big was it?

This earthquake released about 480 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 32,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 2× the energy of this one
  4. This earthquake M 2.8 about 480 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 29.0400, -97.6090. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
DeWitt County, TX 24 km (15 mi) W of here earthquakes near DeWitt County
Karnes County, TX 28 km (17 mi) ENE of here earthquakes near Karnes County
Goliad County, TX 46 km (28 mi) NNW of here earthquakes near Goliad County
Gonzales County, TX 48 km (30 mi) SSW of here earthquakes near Gonzales County
Wilson County, TX 49 km (30 mi) ESE of here earthquakes near Wilson County
Victoria County, TX 68 km (42 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

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

  1. 2.0 7 km WSW of Kenedy, Texas
  2. 1.9 18 km ENE of Falls City, Texas
  3. 1.6 16 km E of Smiley, Texas
  4. 2.8 2 km SSE of Falls City, Texas
  5. 1.8 16 km E of Smiley, Texas
  6. 1.5 2 km NNW of Falls City, Texas
  7. 2.7 3 km SE of Falls City, Texas
  8. 2.7 3 km SE of Falls City, Texas
  9. 3.0 3 km W of Falls City, Texas
  10. 1.6 16 km E of Smiley, Texas
  11. 2.6 15 km E of Smiley, Texas
  12. 1.8 15 km E of Smiley, Texas
  13. 2.2 17 km ESE of Smiley, Texas
  14. 2.5 16 km E of Smiley, Texas
  15. 1.8 15 km E of Smiley, 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 63 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.