QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

5 km SW of Westbrook, Texas

· 7.9 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mitchell County 14 kmHoward County 35 kmScurry County 49 kmSterling County 54 kmBorden County 58 kmNolan County 61 kmCoke County 64 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 2.1 (ml)
Depth
7.9 km below the surface
Felt
no reports yet
Nearest
Mitchell County, 14 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 118 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 32.3250, -101.0660. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mitchell County, TX 14 km (8 mi) W of here earthquakes near Mitchell County
Howard County, TX 35 km (22 mi) E of here earthquakes near Howard County
Scurry County, TX 49 km (30 mi) SSW of here earthquakes near Scurry County
Sterling County, TX 54 km (34 mi) N of here earthquakes near Sterling County
Borden County, TX 58 km (36 mi) SE of here earthquakes near Borden County
Nolan County, TX 61 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

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

  1. 1.5 19 km E of Forsan, Texas
  2. 1.9 24 km SSW of Westbrook, Texas
  3. 2.1 24 km SSW of Westbrook, Texas
  4. 1.5 15 km NNW of Westbrook, Texas
  5. 1.8 23 km SSW of Westbrook, Texas
  6. 1.5 9 km WSW of Westbrook, Texas
  7. 2.1 9 km SE of Big Spring, Texas
  8. 2.1 10 km W of Forsan, Texas
  9. 1.6 10 km W of Forsan, Texas
  10. 1.9 10 km SSW of Big Spring, Texas
  11. 2.1 14 km SW of Westbrook, Texas
  12. 1.8 25 km E of Forsan, Texas
  13. 1.6 22 km NW of Westbrook, Texas
  14. 2.2 9 km SSW of Big Spring, Texas
  15. 3.9 23 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2025-10-12 — it released about 2,000 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.