QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

7 km WNW of Westbrook, Texas

· 9.8 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mitchell County 18 kmHoward County 35 kmScurry County 43 kmBorden County 51 kmSterling County 61 kmNolan County 63 kmCoke County 71 kmGlasscock County 71 kmFisher County 75 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 1.7 (ml)
Depth
9.8 km below the surface
Felt
no reports yet
Nearest
Mitchell County, 18 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 320 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 32.3870, -101.0840. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mitchell County, TX 18 km (11 mi) WNW of here earthquakes near Mitchell County
Howard County, TX 35 km (21 mi) ENE of here earthquakes near Howard County
Scurry County, TX 43 km (27 mi) SSW of here earthquakes near Scurry County
Borden County, TX 51 km (32 mi) SE of here earthquakes near Borden County
Sterling County, TX 61 km (38 mi) N of here earthquakes near Sterling County
Nolan County, TX 63 km (39 mi) W of here earthquakes near Nolan County

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

Aftershocks so far

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

  1. 2.1 27 km S of Westbrook, Texas
  2. 2.4 10 km W of Forsan, Texas
  3. 1.9 27 km E of Forsan, Texas
  4. 2.0 27 km S of Westbrook, Texas
  5. 2.5 26 km S of Westbrook, Texas
  6. 1.9 5 km NW of Westbrook, Texas
  7. 2.5 8 km NE of Hermleigh, Texas
  8. 1.8 14 km WSW of Westbrook, Texas
  9. 2.0 27 km S of Westbrook, Texas
  10. 1.6 19 km SE of Ackerly, Texas
  11. 2.0 24 km SSW of Westbrook, Texas
  12. 1.8 27 km S of Westbrook, Texas
  13. 2.1 6 km ESE of Big Spring, Texas
  14. 2.0 27 km E of Forsan, Texas
  15. 1.5 5 km NW 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.