QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9ml

7 km WSW of Westbrook, Texas

· 7.9 km deep · released about 680 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mitchell County 15 kmHoward County 34 kmScurry County 49 kmSterling County 55 kmBorden County 57 kmNolan County 62 kmCoke County 65 kmGlasscock County 66 kmFisher County 79 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 2.9 (ml)
Depth
7.9 km below the surface
Felt
no reports yet
Nearest
Mitchell County, 15 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 269 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 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 16,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.4× the energy of this one
  4. This earthquake M 2.9 about 680 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 32.3260, -101.0820. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mitchell County, TX 15 km (9 mi) W of here earthquakes near Mitchell County
Howard County, TX 34 km (21 mi) E of here earthquakes near Howard County
Scurry County, TX 49 km (31 mi) SSW of here earthquakes near Scurry County
Sterling County, TX 55 km (34 mi) N of here earthquakes near Sterling County
Borden County, TX 57 km (35 mi) SE of here earthquakes near Borden County
Nolan County, TX 62 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

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

  1. 1.5 11 km W of Forsan, Texas
  2. 1.8 12 km W of Forsan, Texas
  3. 1.7 4 km E of Coahoma, Texas
  4. 1.8 8 km NNW of Forsan, Texas
  5. 1.6 24 km E of Forsan, Texas
  6. 1.9 8 km NNW of Forsan, Texas
  7. 2.3 8 km NNW of Forsan, Texas
  8. 1.6 23 km S of Westbrook, Texas
  9. 1.9 8 km NNW of Forsan, Texas
  10. 2.5 8 km NNW of Forsan, Texas
  11. 1.9 8 km NNW of Forsan, Texas
  12. 1.5 8 km NNW of Forsan, Texas
  13. 2.8 6 km WSW of Westbrook, Texas
  14. 3.1 6 km WSW of Westbrook, Texas
  15. 1.5 8 km NNW of Forsan, 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 130 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.