QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

24 km NNW of Westbrook, Texas

· 8.4 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Scurry County 30 kmMitchell County 34 kmBorden County 35 kmHoward County 39 kmGarza County 72 kmFisher County 72 kmNolan County 73 kmKent County 79 kmDawson 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 2.1 (ml)
Depth
8.4 km below the surface
Felt
no reports yet
Nearest
Scurry County, 30 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 851 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 32.5500, -101.1400. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Scurry County, TX 30 km (19 mi) SW of here earthquakes near Scurry County
Mitchell County, TX 34 km (21 mi) NW of here earthquakes near Mitchell County
Borden County, TX 35 km (22 mi) SE of here earthquakes near Borden County
Howard County, TX 39 km (24 mi) NE of here earthquakes near Howard County
Garza County, TX 72 km (45 mi) SSE of here earthquakes near Garza County
Fisher County, TX 72 km (45 mi) WSW of here earthquakes near Fisher County

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

Aftershocks so far

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

  1. 1.7 22 km S of Westbrook, Texas
  2. 2.5 22 km S of Westbrook, Texas
  3. 2.1 24 km SSW of Westbrook, Texas
  4. 2.4 24 km SSW of Westbrook, Texas
  5. 1.7 7 km WNW of Westbrook, Texas
  6. 2.3 14 km E of Coahoma, Texas
  7. 1.8 20 km NW of Westbrook, Texas
  8. 1.8 14 km SW of Westbrook, Texas
  9. 1.7 15 km E of Coahoma, Texas
  10. 1.9 14 km E of Coahoma, Texas
  11. 1.9 14 km WSW of Westbrook, Texas
  12. 1.7 14 km NE of Hermleigh, Texas
  13. 2.0 20 km SSW of Westbrook, Texas
  14. 2.1 25 km S of Westbrook, Texas
  15. 2.0 23 km SSW 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 4.7 on 2023-02-16 — it released about 7,900 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.