QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

21 km E of Forsan, Texas

· 8.7 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mitchell County 29 kmSterling County 33 kmHoward County 34 kmGlasscock County 46 kmCoke County 55 kmNolan County 71 kmScurry County 72 kmBorden County 74 kmMartin County 80 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
8.7 km below the surface
Felt
no reports yet
Nearest
Mitchell County, 29 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 353 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 32.1250, -101.1440. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mitchell County, TX 29 km (18 mi) SW of here earthquakes near Mitchell County
Sterling County, TX 33 km (21 mi) NNW of here earthquakes near Sterling County
Howard County, TX 34 km (21 mi) SE of here earthquakes near Howard County
Glasscock County, TX 46 km (28 mi) NE of here earthquakes near Glasscock County
Coke County, TX 55 km (34 mi) WNW of here earthquakes near Coke County
Nolan County, TX 71 km (44 mi) WSW of here earthquakes near Nolan County

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

Aftershocks so far

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

  1. 1.8 8 km NNW of Forsan, Texas
  2. 1.6 24 km E of Forsan, Texas
  3. 1.9 8 km NNW of Forsan, Texas
  4. 2.3 16 km ESE of Stanton, Texas
  5. 2.3 8 km NNW of Forsan, Texas
  6. 1.6 23 km S of Westbrook, Texas
  7. 1.9 8 km NNW of Forsan, Texas
  8. 2.5 8 km NNW of Forsan, Texas
  9. 1.9 8 km NNW of Forsan, Texas
  10. 1.5 8 km NNW of Forsan, Texas
  11. 2.8 6 km WSW of Westbrook, Texas
  12. 3.1 6 km WSW of Westbrook, Texas
  13. 1.5 8 km NNW of Forsan, Texas
  14. 2.4 24 km SSW of Westbrook, Texas
  15. 1.6 28 km S 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

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