QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

15 km N of Big Spring, Texas

· 7.5 km deep · released about 120 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Howard County 10 kmBorden County 39 kmMartin County 48 kmMitchell County 52 kmGlasscock County 58 kmDawson County 60 kmScurry County 65 kmSterling County 73 kmMidland County 82 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 2.4 (ml)
Depth
7.5 km below the surface
Felt
no reports yet
Nearest
Howard County, 10 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 927 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 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.9× the energy of this one
  4. This earthquake M 2.4 about 120 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 32.3900, -101.4650. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Howard County, TX 10 km (6 mi) NNW of here earthquakes near Howard County
Borden County, TX 39 km (24 mi) S of here earthquakes near Borden County
Martin County, TX 48 km (30 mi) E of here earthquakes near Martin County
Mitchell County, TX 52 km (32 mi) W of here earthquakes near Mitchell County
Glasscock County, TX 58 km (36 mi) N of here earthquakes near Glasscock County
Dawson County, TX 60 km (37 mi) SE of here earthquakes near Dawson County

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

Aftershocks so far

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

  1. 2.1 29 km WSW of Ackerly, Texas
  2. 1.5 14 km ESE of Stanton, Texas
  3. 1.5 14 km SSE of Stanton, Texas
  4. 1.8 24 km SSW of Westbrook, Texas
  5. 2.1 24 km SSW of Westbrook, Texas
  6. 1.8 23 km S of Westbrook, Texas
  7. 2.3 14 km ESE of Stanton, Texas
  8. 2.6 23 km SSW of Westbrook, Texas
  9. 1.7 12 km W of Forsan, Texas
  10. 2.6 14 km ESE of Stanton, Texas
  11. 1.6 13 km ESE of Stanton, Texas
  12. 1.6 19 km SSW of Westbrook, Texas
  13. 1.5 28 km WSW of Ackerly, Texas
  14. 1.8 24 km SSW of Westbrook, Texas
  15. 2.0 24 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 4.6 on 2021-12-28 — 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.