QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

14 km NNW of Sand Springs, Texas

· 7.7 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Howard County 13 kmBorden County 37 kmMitchell County 45 kmMartin County 55 kmScurry County 58 kmGlasscock County 61 kmDawson County 64 kmSterling County 71 kmGarza County 87 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 1.7 (ml)
Depth
7.7 km below the surface
Felt
no reports yet
Nearest
Howard County, 13 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 752 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 32.4080, -101.3890. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Howard County, TX 13 km (8 mi) NNE of here earthquakes near Howard County
Borden County, TX 37 km (23 mi) S of here earthquakes near Borden County
Mitchell County, TX 45 km (28 mi) WNW of here earthquakes near Mitchell County
Martin County, TX 55 km (34 mi) ENE of here earthquakes near Martin County
Scurry County, TX 58 km (36 mi) SW of here earthquakes near Scurry County
Glasscock County, TX 61 km (38 mi) NNE of here earthquakes near Glasscock County

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

Aftershocks so far

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

  1. 2.0 25 km E of Forsan, Texas
  2. 1.8 24 km E of Forsan, Texas
  3. 2.6 23 km S of Westbrook, Texas
  4. 2.1 23 km S of Westbrook, Texas
  5. 1.6 7 km WNW of Sand Springs, Texas
  6. 2.4 24 km S of Westbrook, Texas
  7. 1.9 20 km NNW of Stanton, Texas
  8. 1.5 24 km E of Forsan, Texas
  9. 1.9 24 km E of Forsan, Texas
  10. 2.0 23 km S of Westbrook, Texas
  11. 1.6 2 km SSE of Coahoma, Texas
  12. 1.6 23 km S of Westbrook, Texas
  13. 3.0 21 km NNW of Stanton, Texas
  14. 1.7 24 km SSW of Westbrook, Texas
  15. 1.6 23 km S 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 22,000 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.