QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

6 km WSW of Westbrook, Texas

· 7.1 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mitchell County 15 kmHoward County 34 kmScurry County 48 kmSterling County 56 kmBorden County 56 kmNolan County 62 kmCoke County 66 kmGlasscock County 67 kmFisher 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 3.1 (ml)
Depth
7.1 km below the surface
Felt
no reports yet
Nearest
Mitchell County, 15 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 219 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 250,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,900× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× 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 32.3380, -101.0760. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mitchell County, TX 15 km (9 mi) WNW of here earthquakes near Mitchell County
Howard County, TX 34 km (21 mi) E of here earthquakes near Howard County
Scurry County, TX 48 km (30 mi) SSW of here earthquakes near Scurry County
Sterling County, TX 56 km (35 mi) N of here earthquakes near Sterling County
Borden County, TX 56 km (35 mi) SE of here earthquakes near Borden County
Nolan County, TX 62 km (38 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

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

  1. 1.9 24 km SSW of Westbrook, Texas
  2. 2.6 24 km SSW of Westbrook, Texas
  3. 2.3 20 km NW of Westbrook, Texas
  4. 1.5 14 km SSW of Big Spring, Texas
  5. 2.1 24 km SSW of Westbrook, Texas
  6. 2.2 16 km SE of Coahoma, Texas
  7. 2.5 16 km SE of Coahoma, Texas
  8. 1.5 23 km S of Westbrook, Texas
  9. 1.9 19 km NW of Westbrook, Texas
  10. 1.6 25 km S of Westbrook, Texas
  11. 2.2 16 km SE of Coahoma, Texas
  12. 1.6 9 km E of Coahoma, Texas
  13. 1.9 10 km E of Coahoma, Texas
  14. 1.7 10 km E of Coahoma, Texas
  15. 1.6 18 km SSE 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 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.