QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

23 km NW of Westbrook, Texas

· 6.5 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Howard County 32 kmMitchell County 33 kmBorden County 35 kmScurry County 37 kmSterling County 75 kmNolan County 75 kmMartin County 76 kmDawson County 76 kmGarza 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 1.8 (ml)
Depth
6.5 km below the surface
Felt
no reports yet
Nearest
Howard County, 32 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 84 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 32.5020, -101.1890. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Howard County, TX 32 km (20 mi) NE of here earthquakes near Howard County
Mitchell County, TX 33 km (21 mi) NW of here earthquakes near Mitchell County
Borden County, TX 35 km (22 mi) SE of here earthquakes near Borden County
Scurry County, TX 37 km (23 mi) SW of here earthquakes near Scurry County
Sterling County, TX 75 km (47 mi) N of here earthquakes near Sterling County
Nolan County, TX 75 km (47 mi) WNW 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. 1.6 25 km SSW of Westbrook, Texas
  2. 1.7 19 km NW of Westbrook, Texas
  3. 1.5 15 km NNW of Sand Springs, Texas
  4. 1.5 14 km NNW of Sand Springs, Texas
  5. 2.3 6 km SE of Ackerly, Texas
  6. 1.5 14 km SW of Westbrook, Texas
  7. 1.5 19 km NW of Westbrook, Texas
  8. 1.5 22 km S of Westbrook, Texas
  9. 1.5 6 km ESE of Big Spring, Texas
  10. 1.5 7 km NNE of Westbrook, Texas
  11. 1.7 11 km NNW of Snyder, Texas
  12. 1.7 17 km SE of Ackerly, Texas
  13. 1.9 17 km SE of Ackerly, Texas
  14. 2.8 17 km SE of Ackerly, Texas
  15. 1.7 23 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2025-10-12 — it released about 5,600 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.