QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3ml

26 km WNW of Robert Lee, Texas

· 8.6 km deep · released about 1.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Coke County 17 kmSterling County 36 kmMitchell County 37 kmNolan County 45 kmTom Green County 73 kmRunnels County 73 kmHoward County 74 kmGlasscock County 76 kmIrion County 82 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 3.3 (ml)
Depth
8.6 km below the surface
Felt
no reports yet
Nearest
Coke County, 17 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 758 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 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× 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 32.0100, -100.7320. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Coke County, TX 17 km (11 mi) NNW of here earthquakes near Coke County
Sterling County, TX 36 km (22 mi) ENE of here earthquakes near Sterling County
Mitchell County, TX 37 km (23 mi) SSE of here earthquakes near Mitchell County
Nolan County, TX 45 km (28 mi) SW of here earthquakes near Nolan County
Tom Green County, TX 73 km (45 mi) NNW of here earthquakes near Tom Green County
Runnels County, TX 73 km (45 mi) WNW of here earthquakes near Runnels 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. 1.7 23 km SSW of Westbrook, Texas
  2. 1.6 25 km E of Forsan, Texas
  3. 1.5 23 km SSW of Westbrook, Texas
  4. 2.5 24 km SSW of Westbrook, Texas
  5. 2.2 23 km S of Westbrook, Texas
  6. 1.7 5 km WSW of Westbrook, Texas
  7. 1.7 27 km E of Forsan, Texas
  8. 1.7 24 km SSW of Westbrook, Texas
  9. 1.6 22 km S of Westbrook, Texas
  10. 2.3 23 km S of Westbrook, Texas
  11. 1.7 23 km S of Westbrook, Texas
  12. 2.1 23 km SSW of Westbrook, Texas
  13. 1.7 27 km S of Westbrook, Texas
  14. 2.2 23 km SSW of Westbrook, Texas
  15. 2.3 23 km SSW of Westbrook, 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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